Mammoth prospect (Apache No. 2 claim), La Paz District (Weaver District), Dome Rock Mts, Colorado River Indian Reservation, La Paz Co., Arizona, USA

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‡Ref.: Jones, Jr., E.L. (1915), Gold Deposits near Quartzsite, Arizona, in Contributions to Economic Geology by F.L. Ransome & H.S. Gale, USGS Bull. 620: 57.

Wilson, E.D., Cunningham, J.B., and Butler, G.M. (1934), Arizona Lode Gold Mines and Gold Mining (revised 1967), Arizona Bureau of Mines Bull. 137: 136.

MRDS database Dep. ID file #10027939, MRDS ID #M004569.

A gold prospect with underground workings located in sec. 12, T5N, R21W, near the base of eastward-trending ridge, about 4 miles S of Moon Mountain, on Native American reservation land.

Mineralization is a faulted quartz vein of variable width, which trends about N70ºE, and is traceable to the west for 1,000 feet (304.8 meters), mainly by abundant float. At the shaft the vein is 10 feet wide.

The country rock is a dark schistose porphyry containing prominent feldspars inclosed by biotite, chlorite, and epidote. The vein matter is a massive white quartz slightly stained with iron and copper salts, with sparsely disseminated pyrite.

Workings include an old incline, probably several hundred feet (121.92 meters ?) deep (already inaccessible by 1914). No production record.

Mineral List

Biotite 'Chlorite Group'

'Copper Stain' Epidote

'Feldspar Group' Pyrite

6 entries listed. 2 valid minerals.