The Ataspaca prospect is in the Cordillera Occidental, 45 km northwest of Tacna, Peru. Epizonal intrusions satellitic to the Caplina- Ataspaca pluton were emplaced 41 m.y. ago into limestones of the Lower Jurassic Pelado Formation along the northeast-trending Chucchuco fault system. Depths of emplacement ranged from 4.5 to 6.0 km....
The Bethlehem Copper Mine, a porphyry copper deposit, is
situated near the geographical center of the Guichon Creek batholith.
The Guichon Creek batholith is located on the east flank of the
Canadian Coast Range in south central British Columbia approximately
250 miles northeast of Vancouver, B. C. The batholith
trends...
The thesis area includes 54 square miles of the southeastern
Cuddy Mountains in west-central Idaho. The oldest rocks within the
area are plutonic phases of the Jurassic Cuddy Mountain complex.
These and Cretaceous (?) intrusive and associated (?) extrusive rocks
and nearby Triassic to Early Jurassic metasedimentary and metavolcanic
rocks...
The oldest rocks of the Sturgill Peak area are herein named the
grassy slope phyllites, and are of Permian (?) age. They are
divided into a phyllitic member, consisting of complexly folded and
highly sheared phyllites and phyllitic cherts, and a limestone member,
containing sheared limestone, silicified limestone, and chert....