Poston Butte deposit (Continental Oil Co. property; Aztec Exploration and Development Co. property; Florence Conoco; Florence Copper Co. property), Florence, Florence District (Blackwater District; Black Rock District), Pinal Co., Arizona, USA
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|Latitude & Longitude (WGS84):||33° 3' 40'' North , 111° 24' 32'' West|
|Latitude & Longitude (decimal):||33.06116,-111.40899|
|Locality type:||Deposit (Inactive) - last checked 2018|
|Köppen climate type:||BSh : Hot semi-arid (steppe) climate|
A Cu deposit located in the NW¼ sec. 33, T4S, R9E (Florence 7.5 minute topo map), about 3¼ miles WNW of Florence, on the N side of the Gila River. Previously owned by the Continental Oil Co. - Conoco, of Colorado (1980).
Further exploration by BHP Billiton in the 1990s.
Mineralization is a porphyry copper orebody. Mineralization includes secondary copper minerals.
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
22 valid minerals.
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Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 15 (Table 1).
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 370.
Singer, D.A., Berger, V.I., and Moring, B.C. (2005): Porphyry Copper Deposits of the World: Database, Map, and Grade and Tonnage Models. USGS Open-File Report 05-1060.
Skillings Mining Review ( ) Conoco Oil Discovers Copper Minerals in Arizona: 59(44), 65(3), 66(1).
USGS Florence Quadrangle map.
Arizona Department of Mineral Resources Continental Oil Co. [Florence project] Active file.
MRDS database Dep. ID #10137610, MAS ID #0040210245.