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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commonly reach elevations of 2,500 m above mean sea level (amsl) and valleys vary from 1,500 m to<br />
1,800 m amsl. Northwest-trending range front faults, such as the Rodeo Fault, are common and east-west<br />
trending faults are found locally. <strong>The</strong> El Castillo <strong>Project</strong> is regionally associated with the intersection of<br />
the Rodeo Fault and a secondary east-west trending fault.<br />
<strong>The</strong> Sierra Madre Occidental is recognized as a gold-copper metallogenic province with potential for<br />
porphyry copper-gold mineralization and epithermal gold mineralization related to areas of Tertiary<br />
volcanic and subvolcanic intrusive activity.<br />
4.2 PROPERTY GEOLOGY<br />
<strong>The</strong> El Castillo property is underlain by massive to porphyritic andesitic rocks of the Tertiary Lower<br />
Series Volcanics. <strong>The</strong>se rocks have been intruded by dacite porphyry sills and dikes. <strong>The</strong> Lower Series<br />
Volcanics are unconformably overlain by felsic ignimbrites of the Upper Series Volcanics and Quaternary<br />
to recent rhyolite, conglomerate, and alluvium (Figure 3 and Figure 4).<br />
<strong>The</strong> rocks of the Lower Volcanic Series strike in a northwesterly direction and dip 40 to 75 degrees to the<br />
northeast in the immediate vicinity of the El Castillo <strong>Project</strong>.<br />
An orthogonal set of faults has been mapped on the Property; a northwest striking set related to the<br />
regional horst and graben basin and range structures and a northeast striking set. Complex offsetting<br />
relationships between the two fault sets suggest that they are contemporaneous.<br />
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