heap leaching
SONORO ANNOUNCES RESULTS OF ANNUAL GENERAL MEETING
Tocvan Announces Completion of Gold-Silver Bulk Sample Leaching Process More Positive Results as Final Recovery Pending
Colibri Option Partner Announces Completion of Leach Process on Bulk Sample Material at Pilar
Aztec Outlines Expansion Drill Targets and Receives Drill Permit for Planned RC Drill Program at Cervantes Gold-Copper Project, Sonora, Mexico
The Mining and Exploration News in Mexico: Highlights on the Third Week of May, 2023.
Quartz blade texture in a low-sulphidation epithermal vein
By Miguel A Heredia
During the 20th week of the year (May 17th to May 21st, 2023), at least 16 press releases were announced by companies working in Mexico, with four reporting resources and developments of their properties, four communicating production and financial results, three disclosing deals and corporate issues, two announcing financing issues, two informing on exploration results, and one commenting on Mexican issues. ON MEXICO ISSUES, Alamos Gold and Guanajuato Silver reported the best drilling intercepts in Mexico on the third week of May, 2023. ON EXPLORATION, In Sonora, Colibri reported a strong soil gas hydrocarbon gold anomaly at its Evelyn-Plomo project. In Oaxaca, Vortex initiated environmental and surface geological studies at its Zaachila project. ON MINING, Americas Gold and Silver reported Q1, 2023 production and financial results. Sierra Metals announced Q1, 2023 production and financial results from their Bolivar and Cusi mines in Chihuahua. Starcore reported Q4, 2023 production results from its San Martin mine in Queretaro. Excellon announced Q1, 2023 financial results. ON FINANCING, Fabled announced that it intends to complete a non-brokered private placement for gross proceeds of up to CAD $500K (Mecatona project, Chihuahua). Excellon announced a private placement financing for up to CAD $10M of subscription receipts (La Negra mine, Queretaro). ON RESOURCES AND DEVELOPMENT, Guanajuato Silver released drill results from their San Ignacio mine in Guanajuato and Topia mine in Durango. Alamos Gold reported results from its ongoing drilling program at Puerto del Aire deposit and Capulin target within its Mulatos mine in Sonora. GoGold announced results of its initial Preliminary Economic Assessment (PEA) at its Los Ricos North project in Jalisco. Tocvan provided an update and sampling results from a bulk sample completed at its Pilar project in Sonora. ON DEALS AND CORPORATE ISSUES, Vizsla granted stock options to Directors, Officers, Employees, and Consultants (Panuco project, Sinaloa). Fabled provided an update on the agreement with Kootenay to acquire the Mecatona property in Chihuahua. Excellon provided corporate highlights for the three month ended March 31, 2023. ON SOCIAL RESPONSIBILITY, no relevant news.
ON MEXICO ISSUE
- Alamos Gold Inc., and Guanajuato Silver Company Ltd., reported the best drilling intercepts in Mexico on the third week of May, 2023. Details are shown in the table below:
ON EXPLORATION
- Colibri Resource Corporation reported a strong soil gas hydrocarbon gold anomaly (SGH) south of the main Zone at its Evelyn-Plomo project in Sonora. To define this anomaly, a total of 110 soils samples were collected at 25m stations along 100m spaced lines. “Collectively, these interpreted features indicate a robust SGH response with a high degree of confidence that it is indicative of blind mineralization underlying the southern SGH gold anomaly”. Colibri plans to drill test this target with the hopes of expanding the Main Zone, as well as to continue evaluating the SGH method as a tool for future exploration on the Evelyn-Plomo project.
- Vortex Metals Inc., initiated environmental and surface geological studies at its Zaachila project in Oaxaca. It will allow protecting the local environment and deepening the understanding of the project´s potential to advance its pursuit of multiple high-grade copper targets.
ON MINING
- Americas Gold and Silver Corporation reported Q1, 2023 production and financial results from its Cosala operation in Sinaloa. The company produced approximately 265K Oz Ag, 2.7M Lb Pb, and 7.2M Lb Zn. Cash cost and AISC were USD $4.61 per Oz Ag and USD $9.52 per Oz Ag respectively. Production for 2023 is expected to be between 1.2-1.4M Oz Ag,11-13M Lb Pb, and 33-37M Lb Zn, benefiting from more production from the higher-grade silver areas in the Upper Zone of the San Rafael mine.
- Sierra Metals Inc., announced Q1, 2023 production and financial results from their Bolivar and Cusi mines in Chihuahua. At Bolivar mine, the company processed 299K tonnes at a cash and AISC of USD $1.85 and USD $3.1 per CuEq payable pound. It reported cost of sales of USD $14.93M; a total cash cost of USD $13.16M; and a cash cost of USD $43.99 per ton processed. At Cusi mine, the company processed 59.1K tonnes at a cash and AISC of USD $23.02 and USD $29.8 per Oz AgEq payable. It reported cost of sales of USD $5.8M; a total cash cost of USD $5.23M; and a cash cost of USD $88.43 per ton processed.
- Starcore International Mines Ltd., reported Q4, 2023 production results from its San Martin mine in Queretaro. The company milled 56,821 tonnes of 1.46 g/t Au and 11 g/t Ag with metallurgical recoveries of 86.12% and 48.72% respectively to produce 2,409 Oz AuEq.
- Excellon Resources Inc., announced Q1, 2023 financial results. Excellon reported a reversal of the USD $22M litigation liability relating to the previously disclosed judgment against one of the company’s subsidiaries in Mexico; a gain on the deconsolidation of San Pedro of USD $24.25M; other income of USD $1.58M; and a net income of USD $15.9M. The company announced in its 2022 Preliminary Economic Assessment (PEA) a post-tax NPV (using a discount rate of 5%) of USD $132.4M and estimated restart capital of USD $20.9M, based on the PEA.
ON FINANCING
- Fabled Silver Gold Corp., announced that it intends to complete a non-brokered private placement for gross proceeds of up to CAD $500K at a price of CAD $0.05 per unit. Gross proceeds will be used to complete a phase 1 exploration program at the Mecatona project in Chihuahua, and for general working capital purposes.
- Excellon Resources Inc., announced a private placement financing for up to CAD $10M of subscription receipts at an offer price of CADS $0.35 per subscription receipt (La Negra mine, Queretaro).
ON RESOURCES AND DEVELOPMENT
- Guanajuato Silver Company Ltd., released drill results from their San Ignacio mine in Guanajuato and Topia mine in Durango. At San Ignacio mine, drilling highlights reported in true widths include hole UGSI23-008 with 1.95 g/t Au and 501 g/t Ag (657 g/t AgEq) over 1.90m, including 3.42 g/t Au and 744 g/t Ag (1,018 g/t AgEq) over 0.70m, plus 2.01 g/t Au and 2 g/t Ag (163 g/t AgEq) over 0.22m, plus 0.23 g/t Au and 94 g/t Ag (113 g/t AgEq) over 0.35m; hole UGSI23-009 with 1.26 g/t Au and 415 g/t Ag (516 g/t AgEq) over 1.93m, including 4.14 g/t Au and 2,020 g/t Ag (2,351 g/t AgEq) over 0.22m, plus 0.25 g/t Au and 113 g/t Ag (133 g/t AgEq) over 0.77m, including 0.46 g/t Au and 215 g/t Ag (252 g/t AgEq) over 0.40m; and hole UGSI23-010 with 1.78 g/t Au and 557 g/t Ag (699 g/t AgEq) over 0.45m, plus 1.68 g/t Au and 8 g/t Ag (142 g/t AgEq) over 1.68m, including 2.57 g/t Au and 9 g/t Ag (215 g/t AgEq) over 0.64m, plus 1.72 g/t Au and 122 g/t Ag (260 g/t AgEq) over 1.72m, including 2.94 g/t Au and 151 g/t Ag (386 g/t AgEq) over 0.60m, plus 0.32 g/t Au and 334 g/t Ag (359 g/t AgEq) over 4.89m, including 1.25 g/t Au and 1,947 g/t Ag (2,047 g/t AgEq) over 0.37m. At Topia mine, drilling highlights reported in true widths include hole UT23-458 with 4.39 g/t Au, 660 g/t Ag, 3.2% Pb, and 8.5% Zn (1,435 g/t AgEq) over 0.45m, plus 13.89 g/t Au, 152 g/t Ag, 1% Pb, and 5.6% Zn (1,551 g/t AgEq) over 0.10m; hole UT23-459 with 2.02 g/t Au, 938 g/t Ag, 24.6% Pb, and 9.8% Zn (2,150 g/t AgEq) over 0.42m; hole UT23-460 with 8.16 g/t Au, 113 g/t Ag, 2.1% Pb, and 1.9% Zn (923 g/t AgEq) over 0.45m; hole UT23-461 with 3.53 g/t Au, 905 g/t Ag, 1.1% Pb, and 7.8% Zn (1,525 g/t AgEq) over 0.10m; hole UT23-463 with 6.55 g/t Au, 1,424 g/t Ag, 4.8% Pb, and 13.8% Zn (2,674 g/t AgEq) over 0.60m; and hole UT23-465 with 0.0 g/t Au, 731 g/t Ag, 4% Pb, and 0.2% Zn (851 g/t AgEq) over 0.15m.
- Alamos Gold Inc., reported results from its ongoing drilling program at Puerto del Aire deposit and Capulin target within its Mulatos mine in Sonora. At Puerto del Aire deposit, drilling highlights reported in true widths and values > 40 g/t Au capped include hole 23MUL117 with 20.95 g/t Au (11.14 g/t Au cut) over 14.15m; hole 23MUL119 3.52 g/t Au over 17.05m, plus 8.33 g/t Au over 18m; hole 23MUL112 with 14.81 g/t Au (12.34 g/t Au cut) over 9.1m; hole 23MUL108 with 16.19 g/t Au (7.63 g/t Au cut) over 7.75m; hole 23MUL98 with 10.8 g/t Au over 3m, plus 33.14 g/t Au over 3.05m: and hole 23MUL115 with 15.49 g/t Au (13.89 g/t Au cut) over 6m. These results extend high-grade gold mineralization outside of Mineral Reserves and Resources at Puerto Del Aire. At Capulin target, drilling highlights include hole 23REF012 with 2.01 g/t Au over 82.45m, including 4.81 g/t Au over 16.40m, including 5.38 g/t Au over 12.35m. Capulin target is located 2km east of the former San Carlos open pit.
- GoGold Resources Inc., announced results of its initial Preliminary Economic Assessment (PEA) at its Los Ricos North project in Jalisco. Highlights of the PEA include an after-tax NPV (using a discount rate of 5%) of USD $413M, with an after-tax IRR of USD $29%; a 13-year mine life producing a total of 110.3M payable Oz AgEq, consisting of 68M Oz Ag, 221.7K Oz Au, 22.8M Lb Cu, 144.1M Lb Pb, and 242.2M Lb Zn; an initial capital costs of USD $221M, including USD $29M in contingency costs, over an expected 18 month build, additional expansion capital of USD $137M, and sustaining capital costs of USD $6M over the life of mine (LOM); an average LOM operating cash costs of USD $9.50 per Oz AgEq, and all in sustaining costs (AISC) of USD $9.68 per Oz AgEq; an average annual production of 8.8M Oz AgEq in years one through twelve; and approximately 3/4 of LOM production is from four open pits containing oxide mineralization and approximately 1/4 is from a separate open pit which contains only sulphide mineralization.
- Tocvan Ventures Corp., provided an update and sampling results from a bulk sample completed at its Pilar project in Sonora. Tocvan reported bulk sample material averaging grades of 1.9 g/t Au and 13 g/t Ag from 148 samples ranging from 0.8 to 3.4 g/t Au and from 5 to 26 g/t Ag. Additionally, 32 fine fraction samples excluded from heap leach process returned Au values from 1.2 to 2.8 g/t Au, with a weighted mean of 2.02 g/t Au, and Ag values from 9 to 25 g/t Ag, with a weighted mean of 16 g/t Ag. The fine fraction along with additional bulk sample material will be used in testing gravity recovery methods. “The heap leach process is currently underway for the Bulk Sample. Over 800 tonnes of Bulk Sample material have been prepared for heap leach processing, an additional 350 tonnes of crushed material and 250 tonnes of raw-bulk sample are available for gravity recovery and later agitated leach testing”.
ON DEALS AND CORPORATE ISSUES
- Vizsla Silver Corporation granted 3.85M stock options at an exercise price of $1.60 to Directors, Officers, Employees, and Consultants. The options are exercisable for a period of five years and will vest over the next two years (Panuco project, Sinaloa).
- Fabled Silver Gold Corp., provided an update on the agreement with Kootenay to acquire the Mecatona property in Chihuahua. “The company has been in the process of preparing required documentation in respect of the Proposed Transaction including a NI 43-101 Technical Report on the Mecatona Property. The Company is continuing to correspond with the TSX Venture Exchange regarding the Proposed Transaction and will provide further updates in due course”.
- Excellon Resources Inc., provided corporate highlights for the three month ended March 31, 2023. The company announced the acquisition of the post-producing La Negra mine in Queretaro. La Negra is a fully permitted mine with Indicated Mineral Resources of approximately 15.1M Oz AgEq at 191 g/t AgEq and Inferred Mineral Resources of approximately 41.8M Oz AgEq at 202 g/t AgEq.
ON SOCIAL RESPONSIBILITY
- No relevant news.
Content like what you have just read can be seen at https://gambusinoprospector.com/ and at LinkedIn’s Mexico Mineral Exploration Group.
On the picture above, quartz blade texture in a low-sulphidation epithermal vein system in a prospect in Zacatecas, Mexico. Photo by Miguel A Heredia.
The Mining and Exploration News in Mexico: Highlights on the Fifth Week of December, 2022.
Ginguro texture in banded quartz vein-breccia
By Miguel A Heredia
During the 52nd week of the year (December 26th to January 1st, 2022), at least 9 press releases were announced by companies working in Mexico, and 1 news published by the media with three disclosing deals and corporate issues, two informing on exploration results, two reporting resources and developments of their properties, and two announcing financing issues. ON MEXICO ISSUES, Mining in Mexico closed 2022 with more expenses in exploration due to lack of mining concessions. ON EXPLORATION, In Sonora, Tocvan provided an annual summary of the activities carried out in 2022 at its Pilar and Picacho properties. In Chihuahua, Mammoth provided a year-end update on activities developed at its Tenoriba project. Zacatecas Silver provided a summary of the 2022 exploration activities developed at its Zacatecas Silver and Esperanza projects located in Zacatecas and Morelos States respectively. ON MINING, no relevant news. ON FINANCING, Guanajuato Silver closed the first tranche of its non-brokered private placement for gross proceeds of CAD $6.8M (El Cubo, San Ignacio, and Valenciana mines, Guanajuato). Regency completed a non-brokered private placement for gross proceeds of CAD $2,159,000 (Dios Padre Project, Sonora). ON RESOURCES AND DEVELOPMENT, MAG Silver reported that final testing of the downstream power distribution and control systems at its Juanicipio project in Zacatecas is now complete. Zacatecas Silver provided a summary of the 2022 exploration activities developed at its Zacatecas Silver and Esperanza projects located in Zacatecas and Morelos States respectively. ON DEALS AND CORPORATE ISSUES, Sierra Madre provided an update on its proposed acquisition of the La Guitarra mine in the State of Mexico. Gatos Silver provided a bi-weekly default status report in accordance with National Policy 12-203 – Management Cease Trade Orders (Cerro Los Gatos mine, Chihuahua). Mammoth announced the issuance of 2,206,000 common share stock options to directors, officers, and contract employees, exercisable at a price of $0.05 per common share (Tenoriba project, Chihuahua). ON SOCIAL RESPONSIBILITY, no relevant news.
ON MEXICO ISSUE
- Mining in Mexico closed 2022 with more expenses in exploration due to lack of mining concessions. The current administration of President Andres Manuel Lopez Obrador has not approved new mining concessions, which has led mining companies to invest more in exploration, with a view of finding new deposits in previously granted ground. In 2018, the concessioned area for mining activities in Mexico was of 10.64%, a figure that by the end of this 2022 stands at 8.59%, according to data from the Ministry of Economy.
ON EXPLORATION
- Tocvan Ventures Corp., provided an annual summary of the activities carried out in 2022 at its Pilar and Picacho properties in Sonora. At Pilar project, the company executed the first core drilling program which was successful in intersecting broad gold mineralization across the Main Zone with one hole returning 1.2 g/t Au over 116.9m, including 12 g/t Au over 10.2m, an a second hole returning 0.8 g/t Au over 108.9m, including 7.6 g/t Au over 9.4m. “Infill and recognizing drilling at Pilar has confirmed that gold mineralization occurs in at least three parallel zones to the Main Zone across a 600m wide area and so far defined along 600m of strike, the same that based on surface indications and historic workings seems to continue for another 600m towards the southeast”. Column Leach studies from surface material at Pilar returned above regional average recovery for gold, reporting over 85% recovery from initial metallurgical testing. At El Picacho property, surface work outlined key target areas across the large 24 square-km project area. An initial drill program was completed at its San Ramon Prospect, but results are pending to be released.
- Mammoth Resources Corp., provided a year-end update on activities developed at its Tenoriba project, Chihuahua. Highlights include the report of the final six drill holes of a 27-hole diamond drill program for a total of 3,244.25m. To date, Mammoth has drill-tested five targets zones within three project areas: El Moreno, Masuparia, and Carneritos, with 55 holes totalling 8,158.25m. “These project areas measure from hundreds of meters to over 1 km in strike length, along a 4km, east-west trend of gold-silver mineralization identified in 3-D modelling incorporating data from over 3,000 soil, chip and channel samples, 26 prior diamond drill holes, geological and structural mapping, and the potential continuity at depth of surface mineralization as indicated by an Induced Polarization/Magnetometer (IP/Mag) geophysical survey”. The company is currently conducting additional studies on the results of the 27 holes, including metallurgical testing, as well as the assessment by a third party resource modelling expert to recommend drill spacing to estimate a maiden mineral resource at the Tenoriba project. The company is also working on a technical report to communicate findings, conclusions, and recommendation for future work.
ON MINING
- No relevant news.
ON FINANCING
- Guanajuato Silver Company Ltd., issued a total of 15,952,196 units at a price of CAD $0.425 per unit to close the first tranche of its non-brokered private placement for gross proceeds of CAD $6.8M. Net proceeds will be used to ramp up production at the Company’s existing mines in and about Guanajuato, Mexico including El Cubo, San Ignacio and Valenciana, expand and modernize the processing facilities at the Topia mine in Durango, Mexico, increase brownfields’ exploration programs, and fund general and administrative expenses. The closing of a second tranche of the Offering is expected to occur on or about January 12, 2023.
- Regency Silver Corp., completed a non-brokered private placement of 10,795,000 common shares at a price of CAD $0.20 per share for gross proceeds of CAD $2,159,000. The company paid a finder´s fee of CAD $16K in cash in connection with part of the closing of the private placement. Net proceeds will be used for work programs on the properties of Regency Silver including drilling and geophysics in early January 2023 on our flagship Dios Padre property, for property payments on other properties of the Company and for general working capital.
ON RESOURCES AND DEVELOPMENT
- MAG Silver Corp., received confirmation from Fresnillo plc that final testing of the downstream power distribution and control systems at its Juanicipio project in Zacatecas is now complete. The entire system has now been energized and Juanicipio has been connected to the national power grid.
- Zacatecas Silver Corp., provided a summary of the 2022 exploration activities developed at its Zacatecas Silver project in Zacatecas State, and Esperanza project in Morelos State. At Zacatecas project, the company filed a NI 43-101 technical report to support its initial Mineral Resource Estimate on the Panuco Vein located within the Zacatecas Silver project. After filing the technical report, the company reported multiple high grade silver intercepts from drilling in an area north of the resource, named Panuco North and in an area of the property named El Cristo, which is an extension of the prolific Veta Grande Silver Vein on the Zacatecas Silver Property. At Esperanza project, the company completed an initial Mineral Resource Estimate outlining a high grade oxide gold deposit with significant exploration potential, and reported that a Pre-Feasibility Study is underway to support high margin, high grade, low capex, and low cost production. In addition, the company announced that multiple community programs continue to function and grow, including projects relating to health, education, and environment.
ON DEALS AND CORPORATE ISSUES
- Sierra Madre Gold and Silver ltd., entered an arm´s length definitive agreement with First Majestic on May 25, 2022 to acquire a 100% interest in the 39,714-hectare La Guitarra mine in the State of Mexico and provided an update on its proposed acquisition. Earlier this month, shareholders voted in favour of a resolution to approve the proposed acquisition of all the issued and outstanding shares of La Guitarra Compañia Minera S.A. de C.V from Corporacion First Majestic, S.A. de C.V., in exchange for 69,063,076 common shares of the company at a deemed price of CAD $0.65 per Consideration Share, having an aggregate value of CAD $44,890,999 (USD $35M). The ordinary resolution with respect to the transaction was approved by 99.99% of the votes cast by shareholders. The transaction has been conditionally accepted by the TSX Venture Exchange.
- Gatos Silver Inc., provided a bi-weekly default status report in accordance with National Policy 12-203 – Management Cease Trade Orders (MCTO). Pursuant to National Policy 12-203, the company must file bi-weekly status reports in the form of further news releases during the period from the Notice until the MCTO is revoked. “The company reports that since the Notice: (i) there have been no material changes regarding the information contained in the Notice that have not been disclosed in a bi-weekly default status report or in a news release referenced therein; (ii) there have been no failures by the company in fulfilling its stated intentions with respect to satisfying the provisions of the alternative information guidelines under NP 12-203; and (iii) there has not been any specified default subsequent to the defaults announced in the Notice and the news releases dated May 13, 2022, August 5, 2022 and November 11, 2022”. (Cerro Los Gatos mine, Chihuahua).
- Mammoth Resources Corp., announced the issuance of 2,206,000 common share stock options to directors, officers, and contract employees, exercisable at a price of $0.05 per common share (Tenoriba project, Chihuahua).
ON SOCIAL RESPONSIBILITY
- No relevant news.
Content like what you have just read can be seen at https://gambusinoprospector.com/ and at LinkedIn’s Mexico Mineral Exploration Group.
On the picture above, ginguro texture in a banded quartz vein-breccia from an intermediate sulphidation epithermal system in a project in Zacatecas, Mexico. Photo by Miguel A Heredia.
The Mining and Exploration News in Mexico: Highlights on the Third Week of December, 2022.

Panning gold in a cow´s horn
By Miguel A Heredia
During the 50th week of the year (December 12th to December 18th, 2022), at least 20 press releases were announced by companies working in Mexico with six informing on exploration results, five reporting resources and developments of their properties, five announcing financing issues, two commenting on Mexican issues, and two disclosing deals and corporate issues. ON MEXICO ISSUES, Trafigura announced that along with eFactor Network and a number of financing institutions are piloting a Sustainable Supply Chain Finance Program for mining companies in Mexico. GR Silver, Vizsla, Mammoth, GoGold, and Almadex reported the best drilling intercepts in Mexico on the third week of December, 2022. ON EXPLORATION, In Sonora, Aztec released final results from its 2021-2022 drilling program at its Cervantes project, and Minaurum provided an update on its optioned Adelita project. In Chihuahua, Mammoth presented results from six holes from its 27 holes diamond drilling program at its Tenoriba project, and Southern Empire has initiated the field exploration program work on its recently optioned Centauro property. In Coahuila, Monumental completed reconnaissance exploration program and defined drill targets at its Jemi Rare Earth Element project. In Jalisco, Almadex released results from the second hole drilled in 2022 at its San Pedro project. Minaurum provided and update on its optioned Taviche mining property. ON MINING, no relevant news. ON FINANCING, Guanajuato Silver announced a non-brokered listed issuer financing exemption private placement for gross proceeds of CAD $7.5M, subject to a minimum offering for gross proceeds of CAD $3M (El Cubo, San Ignacio, and Valenciana mines, Guanajuato). Prismo Metals closed its previously announced brokered private placement for gross proceeds of $3,016,000 (Palos Verdes project, Sinaloa). Tarachi announced a non-brokered private placement for gross proceeds of up to CAD $500K (Magistral Mill and tailings project, Durango). Fortuna announced that it has amendment its existing senior secured revolving credit facility to increase the maximum facility amount by USD $50M to USD $250M (San Jose Mine, Oaxaca). Regency Silver announced a non-brokered private placement for gross proceeds of CAD $2M (Dios Padre Project, Sonora). ON RESOURCES AND DEVELOPMENT, GoGold presented results of nine holes from its ongoing drilling program at its Los Ricos North project, Jalisco. GR Silver announced additional results from its 2022 underground infill drilling program at its Plomosas mine area in Sinaloa. Vizsla Silver Corp., released results from nineteen new drill holes targeting the Tajitos-Copala resource area at its Panuco project, Sinaloa. Tocvan announced plan to collect a bulk sample from its El Pilar project in Sonora. Silver Dollar reported progress on its new underexplored Noria target at its La Joya project, Durango. ON DEALS AND CORPORATE ISSUES, Osisko Development strengthened its Board of Directors with the appointment of a new Non-Executive Director, effective December 14, 2022 (San Antonio Gold project, Sonora). Sierra Metals completed voluntary delisting from the Lima Stock Exchange (Cusi and Bolivar mines, Chihuahua). Southern Empire entered into an option agreement to acquire 100% interest in the Centauro property in Chihuahua. ON SOCIAL RESPONSIBILITY, no relevant news.
ON MEXICO ISSUE
- Trafigura Pte Ltd., announced that along with eFactor Network and a number of financial institutions are piloting a Sustainable Supply Chain Finance Program for mining companies in Mexico. The Program, the first of its type and providing a model that can be scaled across the region, is structured to improve mining companies’ working capital whilst driving responsible sourcing practices along the metals value chain.
- GR Silver Mining Ltd., Vizsla Silver Corp., Mammoth Resources Corp., GoGold Resources Inc., and Almadex Minerals Ltd., reported the best drilling intercepts in Mexico on the third week of December, 2022. Details are shown in the table below:

ON EXPLORATION
- Aztec Minerals Corp., released final results from its 2021-2022 drilling program at its Cervantes project. The 2022-2022 drilling program consisted of 27 RC totaling 5,249m, and 11 oriented core totaling 2,558.5m for a total combined amount drilled of 7,837.5m in 37 drill holes on the California Zone, California Norte, Jasper, and Purisima Este targets. It was successful in intercepting strong mineralization, as well as in expanding the targets. “The multi-element ICP values support the exploration model of the California zone being at the highest portion of a porphyry system, where an overlying high sulfidation zone has been eroded away”. Results of this drilling program are currently being analyzed in order to refine future targeting.
- Minaurum Gold Inc., provided an updated on its Adelita project in Sonora, which is under an option agreement with Infinitum Copper Corp. Infinitum has identified five main target areas of which Cerro Grande is being drilled and plans to drill Las Trancas target soon. Significant mineralization has been intersected at Cerro Grande target in hole AD-22-0018 with 1.91% Cu, 2 g/t Au, and 41 g/t Ag over a true width (TW) of 20.6m; and hole AD-22-0019 with 1.01% Cu, 0.52 g/t Au, and 40 g/t Ag over a TW of 32.25m, including 1.68% Cu, 0.83 g/t Au, and 59 g/t Ag over a TW of 17.05m. Cerro Grand Target is a mineralized zone of up to 36m thick, over 250m deep and has a strike 200m.
- Mammoth Resources Corp., presented results from six holes for a total of 620.7m from its 27 holes diamond drilling program at its Tenoriba project in Chihuahua. Highlights of the drilling include hole TEN21-22 collared on Carneritos Zone with 0.98 g/t Au and 10 g/t Ag (1.12 g/t AuEq) over 3m, and 0.57 g/t Au and 8 g/t Ag (0.68 g/t AuEq) over 10.5m; and hole TEN21 -24 with 1.14 g/t Au and 75 g/t Ag (1.13 g/t AuEq) over 39m, including 5.28 g/t Au and 13 g/t Ag (5.45 g/t AuEq) over 3m, including 1.45 g/t Au and 11 g/t Ag (1.60 g/t AuEq) over 9m, plus 0.46 g/t Au and 2 g/t Ag (0.48 g/t AuEq) over 42m, including 1.21 g/t Au and 5 g/t Ag (1.28 g/t AuEq) over 12m. These six holes bring the total meters drilled in the recent phase to 3,244.25m in twenty seven holes.
- Southern Empire Resources Corp., has initiated the field exploration program work on its recently optioned Centauro property. The company contracted PhotoSat Information Ltd to provide maps of alteration mineral suites typically associated with epithermal precious metal deposits, using their proprietary processing methods for16 band WorldView-3 and high-resolution ASTER satellite optical spectral data. Results of the PhotoSat studies show significant trends highlighting argillic, sericite, and chlorite alteration. Southern also collected 396 soil samples at 50m spacing along E-W lines, spaced 100-200m apart to cover a zone of prospective alteration and mineralization over 4km strike length. Assays are pending.
- Monumental Minerals Corp., completed reconnaissance exploration program, which consisted of detailed geological mapping, regional stream sediment sampling, ground radiometric geophysical surveys, and lithogeochemical sampling to delineate discreet drill targets at its Jemi Rare Earth Element project. To date, 37 whole-rock analytic results from rocks collected at the Jemi project of which 11 have returned values greater than 0.15% total Rare Earth Oxide (TREO), including six samples that returned values greater than 0.23% TREO and up to 0.43% TREO. Results for 269 samples are still pending to arrive. Heavy rare earth oxide (HREO) values (include dysprosium (Dy) and terbium (Tb)), ranged between 1614 ppm and 39 ppm in peralkaline pegmatites, averaging 447 ppm. Six samples exceeded 680 ppm, including three that exceeded 830 ppm. Light rare earth oxides (LREO) values including neodymium (Nd) and praseodymium (Pr), returned values up to 0.26% and 0.23%, with values in trend with HREO concentrations suggesting similar REE-hosting phases in the peralkaline rock samples. “Geological mapping has confirmed that samples with the highest TREO and HREO values are from pegmatitic bodies. Three-dimensional airborne magnetics modeling show that surface pegmatite bodies are spatially associated with a numerous larger magnetic anomalies at depth that may represent potential source intrusions. Specific drill locations will target these pegmatites”.
- Almadex Minerals Ltd., released results from the second hole drilled in 2022 at its San Pedro project in Jalisco. Hole SP-22-004 intersected 846 /t Au over 1.3m. The current drilling program intends to better understand the orientation and distribution of the breccia zone so that further, more focused drilling can eventually be carried out.
- Minaurum Gold Inc., provided an updated on its Taviche project in Oaxaca, which is under an option agreement with Fortuna Silver Corp. Fortuna is currently focused on the re-negotiation of surface rights to be followed by drill permits. “Review of historic data and field mapping over the last year identified the possible continuation of the Mezcal Fault for 3km to the northwest. Drill targeting is in progress along the Mezcal Fault to test for both Mezcal-style gold mineralization and silver bonanza style mineralization associated with jasperoid-related mantos”. Another goal is to develop additional concepts to test the potential at depth at the Cerro La Mina Zone where a drill hole encountered 235 g/t Ag and 0.19 g/t Au over 46.3m.
ON MINING
- No relevant news.
ON FINANCING
- Guanajuato Silver Company Ltd., announced a non-brokered listed issuer financing exemption private placement of up to 17,647,059 units at CAD $0.425 for gross proceeds of CADS $7.5M, subject to a minimum offering of 7,058,824 units for gross proceeds of CAD $3M. Gross proceeds will be used to ramp up production at El Cubo, San Ignacio, and Valenciana mines in Guanajuato; expand and modernize the processing facilities at the Topia mine in Durango; increase brownfield exploration programs across all company´s projects; and fund general working capital expenses and strengthen Guanajuato Silver’s balance sheet.
- Prismo Metals Inc., closed its previously announced brokered private placement for gross proceeds of $3,016,000. The gross proceeds will be used to continue drilling at its Palos Verdes project in Sinaloa, and to continue the mapping and sampling at its Pavitos project in Sonora, as well as to conduct an initial diamond drilling program.
- Tarachi Gold Corp., announced a non-brokered private placement of up to 10M units at a price of CAD $0.05 per unit for gross proceeds of up to CAD $500K. The gross proceeds will be used for exploration, working capital purposes, and for the ongoing development of the Company’s Magistral project in Mexico including, but not limited to, metallurgical test work, final design and permitting.
- Fortuna Silver Mines Inc., announced that it has amendment its existing senior secured revolving credit facility to increase the maximum facility amount by USD $50M to USD $250M (San Jose Mine, Oaxaca).
- Regency Silver Corp., announced a non-brokered private placement of 10M common shares at a price of CAD $0.20 per share for gross proceeds of CAD $2M. Net proceeds will be used for work programs including drilling and geophysics in its flagship Dios Padre project, Sonora, as well as for general working capital.
ON RESOURCES AND DEVELOPMENT
- GoGold Resources Inc., presented results of nine holes from its ongoing drilling program collared at El Favor East deposit within its Los Ricos North project, Jalisco. Highlights of the drilling include hole LRGF-22-140 with 1.39 g/t Au and 139 g/t Ag (3.24 g/t AuEq or 243 g/t AgEq) over 2.5m, plus 0.48 g/t Au and 257 g/t Ag (3.92 g/t AuEq or 294 g/t AgEq) over 13.9m, including 1.84 g/t Au and 960 g/t Ag (14.65 g/t AuEq or 1,099 g/t AgEq) over 3.2m, including 2.96 g/t Au and 2,307 g/t Ag (33.72 g/t AuEq or 2,529 g/t AgEq) over 0.7m; and hole LRGF-22-137 with 0.29 g/t Au and 143 g/t Ag (2.2 g/t AuEq or 165 g/t AgEq) over 61.5m, including 0.66 g/t Au and 300 g/t Ag (4.66 g/t AuEq or 350 g/t AgEq) over 24.3m, including 1.71 g/t Au and 881 g/t Ag (13.46 g/t AuEq or 1,009 g/t AuEq) over 0.7m.
- GR Silver Mining Ltd., announced additional results from its 2022 underground infill drilling program at its Plomosas Mine Area in Sinaloa. Highlights of the drilling include hole PLIP22-28 with 55 g/t Ag, 8.66 g/t Au, 2.7% Pb, 6.6% Zn, and 0.5% Cu (1,242 g/t AgEq) over a true width (TW) of 6.9m; hole PLI17-26 with 3 g/t Ag, 2.64 g/t Au, 0.1% Pb, and 0.1% Zn (257 g/t AgEq) over a TW of 10.7m; hole PLI22-42 with 43 g/t Ag, 1.96 g/t Au, 1.2% Pb, 2.1% Zn, and 0.3% Cu (369 g/t AgEq) over a TW of 20.9m, including 61 g/t Ag, 4.52 g/t Au, 2.9% Pb, 5.5% Zn, and 0.3% Cu (802 g/t AgEq) over a TW of 7.5m, plus 28 g/t Ag, 3.6 g/t Au, 0.6% Pb, 2.3% Zn, and 0.2% Cu (489 g/t AgEq) over a TW of 10.6m, including 46 g/t Ag, 11.5 g/t Au, 0.2% Pb, 3.7% Zn, and 0.4% Cu (1,263 g/t AgEq) over a TW of 2m, plus 87 g/t Ag, 7.13 g/t Au, 4.4% Pb, 8.3% Zn, and 0.2% Cu (1,184 g/t AgEq) over a TW of 0.8m, plus 42 g/t Ag, 3.90 g/t Au, 0.3% Pb, 1.2% Zn, and 0.2% Cu (479 g/t AgEq) over a TW of 1.7m, plus 28 g/t Ag, 6.05 g/t Au, 0.7% Pb, 1.9% Zn, and 0.1% Cu (695 g/t AgEq) over a TW of 1.5m; hole PLI22-47 with 281 g/t Ag, 2.15 g/t Au, 8.9% Pb, and 6% Zn (970 g/t AgEq) over a TW of 2.4m; and hole PLI22-46 with 44 g/t Ag, 1.9 g/t Au, 11.2% Pb, 10% Zn, and 0.1% Cu (940 g/t AgEq) over a TW of 4.9m, including 64 g/t Ag, 4.02 g/t Au, 19.5% Pb, 17% Zn, and 0.1% Cu (1,659 g/t AgEq) over a TW of 1.9m. “The infill drilling program at the Plomosas Mine Area continues to provide information for the Company to enhance the geological model and confirm the presence of high-grade structures on the hanging wall and footwall of the main mineralized breccia. Gold mineralized zones exceeding 20 m down hole width have been drilled in the current program in both the hanging wall and footwall”.
- Vizsla Silver Corp., released results from nineteen new drill holes targeting the Tajitos-Copala resource area at its Panuco project, Sinaloa. Highlights of the drilling include hole CS-22-205 with 2,101 g/t Ag and 9.54 g/t Au (2,640 g/t AgEq) over a true width (TW) of 5.30m, including 3,080 g/t Ag and 23.60 g/t Au (4,563 g/t AgEq) over a TW of 0.58m, plus 85 g/t Ag and 0.24 g/t Au (96 g/t AgEq) over a TW of 0.16m; hole CS-22-210 with 425 g/t Ag and 2.31 g/t Au (561 g/t AgEq) over a TW of 15.50m, including 2,710 g/t Ag and 22.30 g/t Au (4,125 g/t AgEq) over a TW of 0.41m, including 1,285 g/t Ag and 7.24 g/t Au (1,716 g/t AgEq) over a TW of 0.54m, including 1,800 g/t Ag and 9.69 g/t Au (2,371 g/t AgEq) over a TW of 0.41m, including 1,630 g/t Ag and 7.34 g/t Au (2,044 g/t AgEq) over a TW of 1.01m; hole CS-22-216 with 626 g/t Ag and 4.48 g/t Au (905 g/t AgEq) over a TW of 8.09m, including 1,250 g/t Ag and 14 g/t Au (2,170 g/t AgEq) over a TW of 0.81m, including 2,230 g/t Ag and 18.1 g/t Au (3,376 g/t AgEq) over a TW of 0.57m, including 1,170 g/t Ag and 7.54 g/t Au (1,631 g/t AgEq) over a TW of 0.75m; hole CS-22-201 with 237 g/t Ag and 1.74 g/t Au (346 g/t AgEq) over a TW of 2.18m, including 427 g/t Ag and 3.22 g/t Au (629 g/t AgEq) over a TW of 1.11m, plus 2,536 g/t Ag and 13.65 g/t Au (3,340 g/t AgEq) over a TW of 1.86m, including 7,740 g/t Ag and 57.6 g/t Au (11,343 g/t AgEq) over a TW of 0.19m, including 6,220 g/t Ag and 27.20 g/t Au (7,742 g/t AgEq) over a TW of 0.43m; and hole CS-22-217 with 1,496 g/t Ag and 6.56 g/t Au (1,862 g/t AgEq) over a TW of 2.71m, including 1,295 g/t Ag and 4.59 g/t Au (1,535 g/t AgEq) over a TW of 0.64m, including 13,118 g/t Ag and 63.7 g/t Au (16,783 g/t AgEq) over a TW of 0.20m. “The infill results support grade continuity in the south-central portion of Copala structure, while resource expansion drilling to the north and southeast continue to highlight mineralization remains open”.
- Tocvan Ventures Corp., entered into an agreement with a neighboring private mining company for the completion of its first bulk sampling for processing by heap-leach method from its El Pilar project in Sonora. The plan is to process up to 1,000 tonnes of material at a private mining operation less than 25km to the west of Pilar with the aim of providing a more detail account of expected head-grade and recovery percentage of gold. Processing and analysis of this bulk sample is expected to span three to four months. Other goals to accomplish are to continue drilling, update reporting and maiden resource estimate, and permitting for full-scale on-site mine facilities and processing.
- Silver Dollar Resources Inc., reported progress on its new underexplored Noria target at its La Joya project, Durango. The company recently completed a ground magnetic survey on the Coloradito area within the Noria portion of the property, which consisted of 14 lines spaced 50-100m and ranging over 1.3km in length for a total of approximately 19.8km of magnetic data. The geophysics contractor identified 3 relatively well-contrasted and thin magnetic beds striking N150°/N330°, which may underscore, sulphide and ferromagnesian horizons hosted along shear zones. In addition, a total of 125 rock samples have been collected and submitted to the lab of which 79 samples have been received to date. In one of the targets sample assays returned values up to 291 g/t Ag, 0.8 g/t Au, and 1.2% Zn, while in another one 7 samples returned elevated Zn and Pb, ranging from 0.3-1% and 1.4-6.2% respectively. Further follow-up work is being conducted in the areas where both geophysical and geochemical anomalies have been identified to develop new drill targets.
ON DEALS AND CORPORATE ISSUES
- Osisko Development Corporation strengthened its Board of Directors with the appointment of a new Non-Executive Director, effective December 14, 2022 (San Antonio Gold project, Sonora).
- Sierra Metals Inc., completed voluntary delisting from the Lima Stock Exchange, effective December 15, 2022. Sierra Metals’ common shares will continue to trade on the Toronto Stock Exchange (Cusi and Bolivar mines, Chihuahua).
- Southern Empire Resources Corp., entered into an option agreement to acquire 100% interest in the Centauro property in Chihuahua. Southern can earn 100% interest by making cash payments totalling USD $750K, issuing 1.5M common shares of Southern Empire and completing work commitment of USD $800K over a five years period. The option agreement include a 3% Net Smelter Return (NSR) and Southern Empire has the right to buy 2% of the NSR for USD $2M.
ON SOCIAL RESPONSIBILITY
- No relevant news.
Content like what you have just read can be seen at https://gambusinoprospector.com/ and at LinkedIn’s Mexico Mineral Exploration Group.
On the picture above, panning gold in a cow´s horn in a low sulphidation epithermal vein system project in Zacatecas, Mexico. Photo by Miguel A Heredia.
The Mining and Exploration News in Mexico: Highlights on the Third Week of October, 2022.
Cockade texture
By Miguel A Heredia
During the 42nd week of the year (October 17th to October 23th, 2022), at least 15 press releases were announced by companies working in Mexico, and 4 news published by the media with six communicating production and financial issues, four reporting resources and developments of their properties, four commenting on Mexican issues, two announcing financing issues, one discussing social issues, one discussing deals and corporate issues, and one informing on exploration results. ON MEXICO ISSUES, Hermosillo, the capital city of the Sonora State, hosted the 14th International Mining Congress in October 18-21, 2022 with the participation of over 5,000 people. The Mexican Mining Chamber (CAMIMEX) warned that thefts of output and goods like explosives in the mining industry continue to increase despite the support provided by the Secretary of National Defense (SEDENA). According to data from the Ministry of Economy, the Mining Chamber of Mexico (Camimex) and experts, there is a mining collapse in Mexico since 822 mining projects were postponed, 180 foreign capital firms have left the country and there are 25 concessions stopped. GoGold and GR Silver reported the best drilling intercepts in Mexico on the third week of October, 2022. ON EXPLORATION, In Sinaloa, Prismo provided an update on its ongoing drill program conducted at its Palos Verdes project located in the historic Panuco-Copala mining district. ON MINING, Avino, Santacruz, Golden Minerals, American Gold and Silver, and First Majestic reported Q3, 2022 production results from their Mexican mining operations, while Guanajuato Silver announced that it has recommenced mining at its Valenciana Mines Complex in Guanajuato, and provided a 6-month production estimate. ON FINANCING, Sierra Metals announced that it has commenced a process to evaluate and consider the company´s current financial and liquidity position, operational challenges and possible financing and restructuring alternatives that may be available to the company. Barksdale closed the final tranche of its previously announced non-brokered private placement for gross proceeds of $264K, and completed an extension of financial instruments (San Javier project in Sonora). ON RESOURCES AND DEVELOPMENT, Avino announced that the installation and commissioning of the dry-stack tailings at its Avino mine in Durango has been completed. GoGold reported the acquisition of the 1,107 Ha Eagle concession covering the northern strike of the Main Deposit on the Los Ricos South property in Jalisco. Equinox released an updated feasibility study (FS) for its Los Filos mine expansion located in Guerrero State. GR Silver presented drilling results and announced the extension of the SE Area Silver Discovery at its Plomosas deposit in Sinaloa. ON DEALS AND CORPORATE ISSUES, Avinois conducting community agreements in the nearby towns adjacent to its la Preciosa property in Durango as it is committed to moving this project forward as part of the company´s 5-year growth strategy. ON SOCIAL RESPONSIBILITY, Industrias Peñoles and Fresnillo plc mining companies reiterated their commitment in saving and energy efficiency to continue implementing actions that contribute to the fight against global warming in order to build the mining of the 21st century.
ON MEXICO ISSUES
- Hermosillo, the capital city of the Sonora State, hosted the 14th International Mining Congress during October 18-21, 2022, with the participation of over 5,000 people.
- The Mexican Mining Chamber (CAMIMEX) warned that thefts of output and goods like explosives in the mining industry continue to increase despite the support provided by the Secretary of National Defense (SEDENA). The General Director of CAMIMEX, Karen Flores, said that thefts remain a recurrent issue in the sector and highlighted that these crimes are probably perpetrated by organized crime.
- According to data from the Ministry of Economy, the Mining Chamber of Mexico (Camimex) and experts, there is a mining collapse in Mexico since 822 mining projects were postponed, 180 foreign capital firms have left the country and there are 25 concessions stopped. If the policy were to change, 30% more jobs would be created and the contribution to Mexico’s GDP would increase by 0.5%, according to estimates. Mining and metallurgical activity exceeded tourism by 19% in foreign exchange generation. The president of the Association of Mining Engineers, Metallurgists and Geologists of Mexico (AIMMGM), indicated that the uncertainty generated by this administration in the sector has caused a slowdown, which has left investments far from the more than USD $8 billion that were reached in previous years. GoGold Resources Inc., and GR Silver Mining Ltd., reported the best drilling intercepts in Mexico on the third week of October, 2022. Details are shown in the table below:
ON EXPLORATION
- Prismo Metals Inc., provided an update on its ongoing drill program conducted at its Palos Verdes project located in the historic Panuco-Copala mining district in the state of Sinaloa. A total of 1,203m in 4 holes have been drilled to date out of a planned minimum of 2,000m. Drilling has intersected wide structural zones at depth where the Palos Verdes vein is branching into several strands measuring from about 0.5m to 9m in width in andesitic rocks. Core sampling is being completed on the entire structural zone including wall rock with veinlets. Assay results are expected to arrive in early November, 2022.
ON MINING
- Avino Silver & Gold Mines Ltd., reported Q3, 2022 production results from its Avino mine in Durango. The company milled 162.1K tonnes of 59 g/t Ag, 0.31 g/t Au, and 0.66% Cu with metallurgical recoveries of 92%, 74%, and 89% respectively to produce 285.4K Oz Ag, 1.2K Oz Au and 2.1M Lb Cu (778K Oz AgEq).
- Santacruz Silver Mining Ltd., announced Q3, 2022 production results from its Zimapan mine in Hidalgo. It milled 215,765 tonnes of 79 g/t Ag, 2% Zn, 0.7% Pb, and 0.39% Cu to produce 368.6K Oz Ag, 6.8M Lb Zn, 2.6M Lb Pb, and 1.4M Lb Cu (988.6K Oz AgEq).
- Guanajuato Silver Company Ltd., has recommenced mining at its Valenciana Mines Complex (VMC) in Guanajuato. Cut & fill mining of high-grade epithermal veins at Valenciana is currently focused on the Los Pozos mine area where several mineralized blocks had been previously defined. Mineralized material from Valenciana is currently being transported to El Cubo for processing. The company expects to mine 5,000 tonnes per month at Valenciana throughout the remainder of 2022. “The Cata processing facility is centrally located within the Valenciana Mines Complex and has a production capacity of 36,000 tonnes per month. In November 2021 Cata was placed on care & maintenance by its previous owner. Guanajuato Silver had initially anticipated restarting the Cata mill in 2023, but with the rapid recommencement of mining at San Ignacio and the VMC, the company now expects to restart mineral processing at Cata before the end of 2022. The company also provided a 6-month production estimate. Guanajuato Silver expects to mine 125K-140K tonnes in Q4, 2022 to produce over 760K-985K and over 140K-160K tonnes in Q1, 2023 to produce over 910K-1.15M Oz AgEq.
- Golden Minerals Company announced Q3, 2022 production and financial results from its Rodeo mine in Durango. The company mined 192,545 tonnes and reported that 23,618 tonnes were placed in stockpiles awaiting processing and 121,202 tonnes were placed in low grade stockpiles. Golden processed 47,947 tonnes of 2.6 g/t Au and 10 g/t Ag with metallurgical recoveries of 74.6% and 77.6% respectively., to produce 2,972 payable Oz Au in Dore and 11,907 payable Oz Ag in Dore (3,103 payable Oz AuEq in Dore). The company sold 3,108 Oz Au and 11,609 Oz Ag (3,145 Oz AuEq) at an average realized price before refining and selling costs of USD $1,703.10 per Oz Au and USD $18.72 per Oz Ag.
- Americas Gold and Silver Corporation reported Q3, 2022 production results from its Cosalá operations in Sinaloa. It produced 186K Oz Ag, 3.8M Lb Pb, and 9.4M Lb Zn and announced that silver production from the Cosalá operations for the full year 2022 is expected to be at the lower end of the projected range of 0.7-0.9M Oz Ag, while zinc and lead production are expected to be towards the upper end of the projected ranges of 36 to 40M Lb Zn and 13 to 15M Lb Pb.
- First Majestic Silver Corp., reported Q3, 2022 production results from their Mexican Mining operations (San Dimas in Durango, Santa Elena in Sonora, and La Encantada in Coahuila). Figures by mine are shown in the table below:
ON FINANCING
- Sierra Metals Inc., announced that it has commenced a process to evaluate and consider the company´s current financial and liquidity position, operational challenges and possible financing and restructuring alternatives that may be available to the company. “The company faces liquidity challenges as a result of the recent previously announced suspension of operations at the Yauricocha Mine in Peru, and operating losses and negative cash flows that have accumulated, primarily from the Bolivar and Cusi operations in Mexico”.
- Barksdale Resources Corp., closed the final tranche of its previously announced non-brokered private placement with Teck Resources Limited for gross proceeds of $264K. The net proceeds will be used for general corporate and working capital purposes. Barksdale also completed an extension of the maturity date of the secured convertible debentures administered by Delbrook Capital Advisors Inc. by one year until December31, 2023. The debentures have a remaining principal amount of $1.5M and all other terms of the debentures remain unchanged except for the conversion price, which has increased to $0.55 per share from $0.45 per share (San Javier project in Sonora).
ON RESOURCES AND DEVELOPMENT
- Avino Silver & Gold Mines Ltd., announced that the installation and commissioning of the dry-stack tailings at its Avino mine in Durango has been completed. The company chose dry-stack tailings for its environmental, safety and economic advantages, as well as because it reduces the need to extract water from local sources by recycling the water removed from tailings.
- GoGold Resources Inc., reported the acquisition of the 1,107 Ha Eagle concession covering the northern strike of the Main Deposit on the Los Ricos South property in Jalisco by USD $2.1M to be paid over 4 years. As a result of this acquisition, all of the concessions in Los Ricos South are now contiguous. “This offers the potential for an additional bulk tonnage target in Los Ricos South, with continuity from the Main Area and Eagle”.
- Equinox Gold Corp., released an updated feasibility study (FS) for its Los Filos mine expansion located in Guerrero State. Highlights of the FS include an after-tax NVP at 5% discount rate of USD $625M at base case of USD $1,675 per Oz Au; after-tax IRR of 26% at USD $1,675 per Oz Au; 5.4M Oz Au of Proven + Probable Mineral Reserves with grades of 0.65 g/t Au for open pit ore material and 3.94 g/t Au for underground ore material (average grade of 0.86 g/t Au); 7.9M Oz Au of Measured and Indicated Resources (exclusive of Reserves) with grades of 0.71 g/t Au for open pit ore material and 3.65 g/t Au for underground ore material (average grade of 0.75 g/t Au); 3.97M Oz life-of-mine (LOM) Au production, with 360K Oz peak average annual gold production (2025-2030), 280K Oz average annual gold production LOM (2023-2036), 1.22M Oz Au produced from the heap leach with average recovery of 55%, 2.75M Oz Au produced from the CIL plant with average recovery of 88%; 11.83M Oz LOM silver production; USD $993M after-tax LOM cumulative net cash flow; USD $981/ Oz average LOM cash cost; USD $1,081/Oz average LOM AISC; USD $318M initial capital cost to build the CIL plant and associated infrastructure; and 14.5-year mine life with extension potential from Mineral Resources conversion and exploitation success.
- GR Silver Mining Ltd., presented drilling results and announced the extension of the SE Area Silver Discovery at its Plomosas deposit in Sinaloa. Drilling highlights include hole SMS22-16 which identified a wide hydrothermal breccia and stockwork system with multiple high grade Ag intervals such as 112 g/t Ag, 0.06 g/t Au, and 0.1% Zn over 123.1m, including 289 g/t Ag, 0.05 g/t Au, and 0.1% Zn over 13.1m, including 4,680 g/t Ag, 0.57 g/t Au, 0.1% Pb, and 0.1% Zn over 0.4m, and 250 g/t Ag, 0.1 g/t Au, 0.1% Pb, and 0.3% Zn over 27.3m, including 1,351 g/t Ag, 0.3 g/t Au, 0.1% Pb, and 0.2% Zn over 0.3m, and 635 g/t Ag, 0.08 g/t Au, 0.2% Pb, and 0.3% Zn over 6.4m, including 2,203 g/t Ag, 0.17 g/t Au, 0.8% Pb, and 1.4% Zn over 0.5m, and 102 g/t Ag and 2.6 g/t Au over 1.5m; and hole SMS22-14 with 23 g/t Au and 0.06 g/t Au over 10.5m, and 118 g/t Ag, 0.02 g/t Au, and 0.1% Zn over 3.5m, including 1,790 g/t Ag, 0.03 g/t Au, 0.7% Pb, and 2.9% Zn over 0.2m, and 22 g/t Ag, 0.08 g/t Au over 10.9m. The drilling program continues at the SE Area to define the geometry and lateral extents of the mineralization. “The occurrence of Ag anomalous zones on surface along the 1.5km target contact, further SE from the SE Area, provides new targets for the company to continue drilling, aimed at expanding the footprint of mineralization and potentially for incorporation into the planned resource estimation update in Q1, 2023”.
ON DEALS AND CORPORATE ISSUES
- Avino Silver & Gold Mines Ltd is conducting community agreements in the nearby towns adjacent to its la Preciosa property in Durango as it is committed to moving this project forward as part of the company´s 5-year growth strategy.
ON SOCIAL RESPONSIBILITY
- Industrias Peñoles S.A.B. de C.V. and Fresnillo plc mining companies reiterated their commitment in saving and energy efficiency to continue implementing actions that contribute to the fight against global warming in order to build the mining of the 21st century. In accordance with their sustainable development policies, both companies have programs to reduce greenhouse gas emissions, such as those from transportation, for which they implemented a strategy to save energy and use clean sources. Peñoles and Fresnillo plc are committed to caring for the environment and seek to achieve, in the near future, the objective of zero significant environmental impacts.
Content like what you have just read can be seen at https://gambusinoprospector.com/ and at LinkedIn’s Mexico Mineral Exploration Group.
On the picture above, cockade texture from a low-sulphidation epithermal Au-Ag vein system in a project in Sinaloa, Mexico. Photo by Miguel A Heredia.
The Mining and Exploration News in Mexico: Highlights on the Fourth Week of December, 2021

By Jorge Cirett
During the 51st week of the year (December 20th to December 26th, 2021), at least 16 press releases were announced by companies working in Mexico. To note, three companies posted exploration advances on their properties, one obtained an environmental permit to keep operating, three released financing/shares/stock exchange related news, while five companies posted on project development or resource definition and one more on a property sale. ON MEXICO ISSUES, the environmental permit needed to keep Fortuna Silver’s San José mine in operation was finally granted by SEMARNAT. ON EXPLORATION, In Sonora, Colibri Resources completed a 3,122 m RC drilling campaign at Evelyn; Silver Spruce is preparing to submit the environmental permit for El Mezquite. Southern Empire Resources initiated an air-borne magnetic and radiometric geophysical survey. ON MINING, Fortuna Silver Mines was granted the environmental permit to continue its operations at the San Jose mine in Oaxaca. The company had to sue SEMARNAT because the organism was not granting the permit although complaining with all regulations. In the end, not-public negotiations and technical reviews resulted in the permit being granted. ON FINANCING, Alamos Gold is to repurchase up to 30 M of its public shares. Prime Mining was added to the MVIS Global Junior Miners Index. Sonoro Gold closed its non-brokered placement for $3 M. ON RESOURCES AND DEVELOPMENT, Almaden Minerals updated on its 2022 plans at Ixtaca; The environmental permit is being prepared for re-submittal as well as the human rights impact assessment (HRIA) report; A favorable outcome on a Supreme Court lawsuit is expected for H2 2022. Guanajuato Silver Co. provided drilling results for El Cubo and Pinguico in Guanajuato. Avino Silver & Gold Mines filed the mineral resource estimate for La Preciosa, in Durango. Silver Dollar Resources informed on the drilling of 1,134 m at its La Joya project in Durango. Azucar Minerals defined a large lithocap at a new target zone on its El Cobre project, Veracruz. ON DEALS AND CORPORATE ISSUES, GR Silver Mining sold El Salto and El Salto Sur mining concessions (covering 56,910 ha) to Grupo Minero Venturex, for past taxes and a 0.5% NSR. ON SOCIAL RESPONSIBILITY, SilverCrest Metals, Peña Colorada and Industrias Peñoles informed on social measures for the betterment of communities near its operations.
ON MEXICO ISSUES
- The Mexican environmental regulator (SEMARNAT) finally approved the environmental permit needed to keep Fortuna Silver’s San José mine (in Oaxaca) in operation. Thousands of workers and inhabitants of communities near the mine to be affected by the impending closure appreciate the outcome.
ON EXPLORATION
- Colibri Resource Corp. completed 3,122 m of reverse circulation (RC) drilling in 22 holes at its Evelyin project in Sonora. The drill program, geological mapping and outcrop sampling were paused for the holidays. “The Company will resume Phase I drilling at the El Sahuaro and Cerro Rojo targets, as well as other prioritized targets on the property in January, upon receipt and interpretation drill assay results”.
- Southern Empire Resources Corp. initiated a high-resolution airborne magnetic and radiometric geophysical surveys at its Pedro project in Durango. The geophysical program comprises 384 line-km in 96 flight lines at 50 m spacing. In addition, a nine-hole 2,000 m drill core program is expected to start in January of 2022 in the 1,750 hectares mineral concession.
- Silver Spruce Resources Inc. informed it is in the reviewing process for submission of the environmental report (Informe Preventivo) on its El Mezquite project in Sonora. The company intends to carry an additional phase of reverse circulation drilling with up to fourteen holes comprising 1,500 to 2,500 m in the 180 hectares project.
ON MINING
- Fortuna Silver Mines Inc. informed the Secretaría de Medio Ambiente y Recursos Naturales (SEMERNAT) granted a 12 year extension of the environmental impact authorization (abbreviated as MIA, in Spanish) at the San Jose mine in Oaxaca. SEMERNAT had previously denied the extension application and Fortuna had to appeal the decision. “After continued dialogue and technical evaluation, SEMARNAT confirmed operations at the San Jose Mine are conducted in accordance with all environmental obligations” and granted the extension on the existing MIA.
ON FINANCING
- Alamos Gold Inc. filed for a normal course issuer bid permitting Alamos to purchase for cancellation up to 30 M class A common shares, representing 10% of the company’s public float of the common shares to date. “The price for any repurchased Common Shares will be the prevailing market price at the time of the purchase. All Common Shares purchased by Alamos will be cancelled“ (Mulatos, Sonora).
- Prime Mining Corp. has been added to the MVIS Global Junior Miners Index as of December 17, 2021 (Los Reyes, Sinaloa).
- Sonoro Gold Corp. announced the closing of its previously announced non-brokered placement for aggregate proceeds of $3 M. In total the company paid $47.4 K in finder’s fees and 263.4 K in non-transferable Finder’s warrants.
ON RESOURCES AND DEVELOPMENT
- Almaden Minerals Ltd. presented its plans for 2022. The company is preparing the resubmittal of the environmental permit for the Ixtaca project in Puebla, documenting well beyond the legal and regulatory framework in Mexico for filing in H1 2022, as well as the human rights impact assessment (HRIA) report. Almaden expects a lawsuit at the Supreme Court of Justice of Mexico being used to dispute the constitutionality of the Mexican mineral title regime to be solved favorably, optimistically in H2 2022. Since the last press release in October 2021, three more drill holes have been completed in the South East Alteration zone target near Ixtaca, and “The geologic observations and complete assay data will be analysed and additional mineral studies will be conducted on the core in order to identify any geochemical or mineral vectors in order to plan follow-up work in this area”.
- Guanajuato Silver Company Ltd. provided drilling results from the El Cubo and Pinguico in Guanajuato. At the Cebolletas and 1850 Stope true width (TW) highlighted intervals comprise 2.00 m @ 1.10 gpt Au, 85 gpt Ag; 0.45 m @ 4.33 gpt Au, 192 gpt Ag; 3.87 m @ 1.38 gpt Au, 124 gpt Ag; 1.40 m @ 0.37 gpt Au, 99 gpt Ag in drilling by GR Silver and 1.62 m @ 2.85 gpt Au, 179 gpt Ag; 2.60 m @ 1.12 gpt Au, 131 gpt Ag; 1.71 m @ 0.46 gpt Au, 152 gpt Ag in drilling by Endeavour Silver. At El Cubo Villapando highlighted TW intervals comprise 6.35 m @ 0.69 gpt Au, 65 gpt Ag; 1.57 m @ 0.88 gpt Au, 98 gpt Ag. At El Pinguico, highlighted TW intervals comprise 4.05 m @ 0.68 gpt Au, 62 gpt Ag; 1.00 m @ 1.50 gpt Au, 122 gpt Ag; 0.55 m @ 2.11 gpt Au, 505 gpt Ag; 1.65 m @ 2.45 gpt Au, 125 gpt Ag; 7.95 m @ 1.35 gpt Au, 39 gpt Ag; 0.75 m @ 8.81 gpt Au, 208 gpt Ag; 8.10 m @ 1.00 gpt Au, 93 gpt Ag; 0.55 m @ 1.91 gpt Au, 75 gpt Ag.
- Avino Silver & Gold Mines Ltd. filed the mineral resource estimate report on the La Preciosa project in Durango, which the company is proposing to acquire. The indicated mineral resource estimate comprises 17.4 M tonnes @ 176 gpt Ag, 0.34 gpt Au (202 gpt AgEq), containing 99 M Oz Ag, 189 K Oz Au (113 M Oz AgEq), whereas the inferred mineral resource includes 4.4 M tonnes @ 151 gpt Ag, 0.25 gpt Au (170 gpt AgEq), containing 21 M Oz Ag, 35 K Oz Au (24 M Oz AgEq).
- Silver Dollar Resources Inc. informed 1,134 m of drilling have been completed in five holes at its La Joya project in Durango. “The initial drilling program is focused on target development on the Noria portion of the La Joya property with an emphasis on testing for possible structural extensions of known mineralized zones”.
- Azucar Minerals Ltd. defined a large area of lithocap alteration in a newly outlined target at El Cobre project in Veracruz.” The new spectral mineral mapping in this area ….. has further defined a strong alteration signature with clear zoning including a central diaspore-pyrophyllite-shallow alunite/dickite and concentric halos of paragonitic and muscovitic white mica and inner propylitic epidote halo”. A soil sampling program is being completed for spectral and geochemical analysis intending to identify vectors to focus a drill program.
ON DEALS AND CORPORATE ISSUES
- GR Silver Mining Ltd. announced the sale of El Salto and El Salto Sur non-core concessions, acquired from Mako Mining Corp. on March 2021, to the private Mexican company Grupo Minero Venturex S.A. de C.V.. The company received US$1 K, retaining a 0.5% NSR, and leaving Venturex responsible to pay all outstanding concession fees and related fines (Note by editor.- holding large titled mining concessions in Mexico is very expensive). In June GR Silver applied for the reduction of the surface of the 56,910 ha claims, but still has to receive the approval from the Dirección General de Minas (DGM).
ON SOCIAL RESPONSIBILITY
- SilverCrest Metals inaugurated the Tetuachi bridge across the Sonora River in Arizpe, Sonora.
- Peña Colorada donated material and equipment to the Biosfera Sierra de Manantlán.
- Industrias Peñoles invested seven million pesos in the park Bosque Venustiano Carranza in Torreon, Coahuila.
On the image below: epidote filled fractures with calc-sodic halo and late quartz veinlet in a copper project in the Sonoran Desert. Picture by Jorge Cirett.






