43-101 2008 Technical Report On The La Fortuna Project, Durango ...
43-101 2008 Technical Report On The La Fortuna Project, Durango ...
43-101 2008 Technical Report On The La Fortuna Project, Durango ...
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Toward the center of the mineralized area, just below the alluvial cover, is an area with abundant<br />
chalcedonic silica. This silica occurs as veins and irregular masses and is occasionally mineralized,<br />
although it is more likely that mineralization will occur in the immediate, argillized wallrocks (Plate 4).<br />
Chalcedonic silica ranges in color from white through ochre and red to black and occasionally is cut by<br />
narrow brecciated intervals ranging in width from a few millimeters to a few centimetres. In at least one<br />
location, dark gray to black chalcedonic silica is intimately associated with chrysocolla.<br />
Plate 3. Mineralized fractures in dacite porphyry.<br />
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