Dec 7 2010
ECU Silver Mining Inc. (TSX:ECU) has announced that it has discovered a "mantos-type" mineralized zone in the new underground development at the Chicago mine.
The newly discovered zone included a cut assaying 350 grams per tonne (g/t) silver (Ag), 6.40% lead (Pb) and 12.13% Zn over a width of 3.0 meters (m) (10 feet).
Michel Roy, CEO and Chairman of ECU stated, "The mantos-type of mineralization is typically related to replacement bodies which is a very encouraging development for us, as some of the best orebodies in Mexico are of this type of mineralization. Historical mining in "mantos" style deposits have shown that these types of mineralization are generally associated with very high grades and good widths."
The new mineralization was discovered through an underground drift that was following the "Gambusinos" vein in the Chicago mine. The mantos is differentiated from the mineralized veins in that the mineralization consists of replacement bodies inserted between limestone beds. This type of mineralization, while normally limited in lateral extent, can be followed for significant distances along its plunge and is typically much wider than normal veins. The mantos deposits typically contains higher than normal grades of silver, lead and zinc. Assays to date are:
To date, six cuts have been assayed with an average grade of 161 g/t Ag, 2.45% Pb and 4.70% Zn over an average width of 3.3 m (11 feet). Much higher grades can commonly exist in mantos style deposits which would suggest that the newly discovered zone is near the top of the structure. Consequently it is expected that grades will improve as development goes further down plunge along the mantos.
Source: ECU Silver Mining Inc.