The highest grade intercepts of the week are dominated by Discovery Silver’s release from Cordero, in Chihuahua, with top places for gold, lead and zinc, and second only (and not far behind) in silver to Endeavour Silver’s intercept of 7.28 m @ 1,129 Ag at Guanceví, Durango. As it happens with several of the largest mineral resources in Mexico, Cordero is one of these accumulation of metals not easily cajoled to only a deposit type, with high grade intermediate sulfidation epithermal veins cutting through (overprinting?) disseminated Ag-Pb-Zn mineralization (earlier?) related to the intrusion of felsic laccoliths, dikes and sills into a calcareous sedimentary sequence, with skarn and carbonate replacement mineralization dominating parts of the deposit. A very broad classification would put Cordero as polymetallic intrusive related mineralization. With the exception of the porphyry copper related skarn mineralization of La Adelita, in Sonora, the rest of the properties display intermediate sulfidation mineralization.
