8 Km) northeast of Cretaceous quartz/granite porphyry intrusive rocks
historically explored for molybdenum and copper in the Spruce Mountain Mining District.
Gold mineralization is found in skarn material associated with intrusive rocks
and within veins hosted by both intrusive and sedimentary rocks.
One of the areas of interest, the El Oso project area, is located over Cretaceous and Tertiary age volcanic and intrusive rocks
The Property is underlain by rocks of the Proterozoic Wollaston Domain comprising ortho- and paragneisses, including Archean gneissic domes (basement) and minor younger intrusive rocks
including abundant pegmatite bodies.
The geological setting of the La Reforma Mine is complex and consists of Mesozoic age, carbonate rich, meta-sedimentary and meta-volcanic rocks which are intruded by several phases of intrusive rocks
from Cretaceous to Miocene time.
Recognition of these intrusive bodies at Bailey Hills was previously hampered by post-mineralization volcanic cover rocks, but geophysical surveys have identified intrusive rocks
and numerous high angle faults underlying the claim area.
Retrograded QSP altered granitic intrusive rocks
with molybdenite-quartz stringers persisted down to 258 m, where a 3 m wide fault zone was encountered, perhaps at the contact with a large intrusive body.
The intrusive rocks
are also mineralized with disseminated pyrite replacing biotite and pyrite and bismuthinite in quartz-carbonate veinlets.
This anomaly appears to be open to the east and west and coincides with a zone of weathered monzonitic intrusive rocks
that differ markedly from the intrusive rocks
elsewhere on the property.
Gold-silver mineralization occurs in veins and stockwork hosted in felsic tuffs which overly granitic intrusive rocks
The Twilight Zone breccia and San Pedro breccia are mineralized zones within and adjacent to granodiorite igneous rocks, thus there is an important relationship between the sedimentary rocks, veins, breccias and intrusive rocks
at Vianey Mine.
Along Rufin Kreek itself, a several hundred metre square surface area is currently being mined from the alluvial gravels up onto the surrounding hillsides where saprolitic intrusive rocks
and quartz veinlets are exposed.