4-8-016: quartz monzonite - Pima District - Pima Mine

Details

Specimen Number4-8-016Alternate NumberP-6CommentsQuartz monzonite porphyry. Specimen comes from 150 ft. wide dike-like mat of porphyry intruded along a N20E structure (the Pima system is more dike-like than stock-like). In contact with skarn material laterally and with hanging wall metasediments above. Sample contains several vein types, including K-spar, milky quartz+molybdenite, sericite+talc, and late fibrous gypsum. Molybdenite is common with chalcopyrite and pyrite in veinlets, with quartz in quartz+moly veinlets, and as disseminated grains. Specimen would run 0.03 to 0.04% Mo and 0.15% Cu. Overall unit is pervasively sericitized.In Teaching CollectionNoMineral(s)feldsparpyritequartzsericiteRock Namequartz monzoniteDistrictPimaMinePimaExternal LinkMindatGeo-LocationundefinedSub-LocationundefinedDeposit TypePorphyry CopperGeo-Coords^[1]Reference MaterialACL-109: Thurmond, R.E., and Storms, W.R., 1958, Discovery and Development of the Pima Copper Deposit, Pima Mining Co., Pima County, Arizona, Bur. Mines Inform. Circ. 7822, 19 p.

ACL-113: Thurmond, R.E., Olk, J.F., Komadina, G.A., Journeay, J.A., Spaulding, E.D., and Hernlund, R.W., 1958, PIMA: a three-part story, Min. Eng., p. 453-462.

ACL-121: Langlois, J.D., 1976, Geology of the Cyprus Pima mine, Pima County, Arizona, in Jenney, J.P., and Hauck, H.R., eds., AZ Geol. Soc. Digest Volume XI, Proceedings of the Porphyry Copper Symposium, Tucson, AZ, March 18-20, p. 103-114.

ACL-153: Cooper, J.R., 1960, Some Geologic Features of the Pima Mining District, Pima County, Arizona; U.S. Geol. Surv. Bull. 1112-C, Washington, D.C., 40 p.

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4-8-016: quartz monzonite - Pima District - Pima Mine

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4-8-016: quartz monzonite - Pima District - Pima Mine