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Santa Maria District (Planet District; Swansea District; Bill Williams District), Buckskin Mts, La Paz Co., Arizona, USA
Chalcanthite
Planet Mine, Planet Mine group, Planet, Santa Maria District, Buckskin Mts, La Paz Co., Arizona, USA
Photo: Tony Peterson
Planet Mine, Planet Mine group, Planet, Santa Maria District, Buckskin Mts, La Paz Co., Arizona, USA
Photo: Tony Peterson
Latitude: 34°10'48"N
Longitude: 113°55'12"W
Longitude: 113°55'12"W
Bancroft, H. (1911), Reconnaissance of the ore deposits in northern Yuma County, Arizona, USGS Bull. 451: 46-59.
Darton, N.H. (1925), A Resumé of Arizona Geology, University of Arizona, Arizona Bureau of Mines Bull. 119: 215-218.
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: 127.
Harrer, C.M. (1964), Reconnaissance of Iron Resources in Arizona, US Bureau of Mines Information Circular 8236: 125-126.
Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geological Survey Branch Bull. 192, Index of Mining Properties in Yuma County, Arizona: 172 (Table 4).
Arizona Bureau of Mines file data.
A Cu-Fe-Mn-Au-Ag (Ti-Ni-V-Cr-Co-Zn-Pb-Ga-Zr-St-Be) mining district located in extreme northern La Paz Co., in the central Buckskin Mountains, immediately South of the Bill Williams River, which forms the boundary with Mohave Co., North of Bouse.
This area is a rugged, dissected region that consists of granitic gneiss and schist, overlain by metamorphosed limestones, amphibolites and mica schists. Mineralization is varied: (1) Oxidized and sulfide copper ores in irregular, lensing, and often massive iron oxide replacement bodies in bedded, faulted, folded and tilted Paleozoic limestone, marble and dolomite, and in Precambrian schist, usually close to the faulted and brecciated contact of carbonate beds with Precambrian gneiss and schist; (2) Hematite and specularite, usually with irregular deposition of oxidized copper mineralization and some gold, in irregular, lensing, replacement bodies or along faults in Paleozoic carbonate rocks to brecciated contacts; (3) Manganese oxides, associated with iron oxides, in irregular bodies along shear zones in Paleozoic quartzite and limestone and along Paleozoic limestone beds; (4) Free gold in fractures in Paleozoic or Precambrian quartzite; (5) and, Small, spotty gold placers along washes.
Workings include several large scale open pit and shaft operations and many smaller mines and prospects worked since the 1860's to recent times. Total estimated and recorded mine production of base and precious metals would be some 1.4 million tons of ore containing about 23,000 tons of copper, 1,008 oz. Au, and 35,000 oz. Ag. About 400 long tons of manganese ore and concentrates (20-34% Mn) have been shipped. Placer operations have produced some 120 oz. of gold with 12 oz. silver.
Mineral List
Mineral list contains entries from the region specified including sub-localities26 entries listed. 20 valid minerals.
Localities in this Region
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Locality Updated: Larson Exploration Prospect, Menominee Range, Florence Co., Wisconsin, USAFrom Bill Cordua, 19th Jun 2013 03:45:17