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    Westra Keith 1982 Stockwork molybdenum deposits reply EG
    October 14, 2020
    Westra Keith 1981 Classification genesis stockwork Mo deposits
    October 14, 2020

    Swan et al 1981 Precambrian stratiform gold Yavapa co AZ

    By: MagmaChem Research Institute

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    1-19 Swan, M.M., Hausen, D.M., and Newell, R.A., 1981, Lithological, structural, chemical, and mineralogical patterns in a Precambrian stratiform gold occurrence, Yavapai County, Arizona, in Hausen, D.M., and Parks, W.C., eds., Process Metallurgy: New York, American Institute of Mining, Metallurgical, and Petroleum Engineers, Proceedings of the 110th A.I.M.E. Annual Meeting, Chicago, Illinois, Feb. 22-26, 1981, p. 143-157.

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    Description

    1-19 Swan, M.M., Hausen, D.M., and Newell, R.A., 1981, Lithological, structural, chemical, and mineralogical patterns in a Precambrian stratiform gold occurrence, Yavapai County, Arizona, in Hausen, D.M., and Parks, W.C., eds., Process Metallurgy: New York, American Institute of Mining, Metallurgical, and Petroleum Engineers, Proceedings of the 110th A.I.M.E. Annual Meeting, Chicago, Illinois, Feb. 22-26, 1981, p. 143-157.

    ABS
    A stratiform gold occurrence of Precambrian age located 20 milessoutheast of Prescott, Arizona, within the Agua Fria Mining District,displays chemical, mineralogical, structural and lithological patternsindicative of a distal, exhalative volcanogenic environment. Metavolcanicand metasedimentary rocks of the Proterozoic Yavapai Series (1775-1820 m.y.)host the mineralization and are characterized by greenschist grade metamorphism,steeply-plunging penetrative folds and steeply-dipping schistosity.Mineralization is confined to a 100m thick stratigraphic section that iscomprised of a series of thin auriferous massive sulfide beds• and intercalatedschist containing disseminated sulfides. The mineralization extendsmore than 4km along strike. Coincident with ,and largely confined to themineralized strata, are anomalous amounts of As, Sb, Cu, Pb, Zn and Ag andassociated silicification, sericiti2;ation and carbonatization. This exhalativemineralized system is interpreted to have been deposited in apaleotopographic low on the distal flank of a submarine rhyolite dome andto represent the final episode of a Precambrian volcanic cycle.

    Product details

    1-19 Swan, M.M., Hausen, D.M., and Newell, R.A., 1981, Lithological, structural, chemical, and mineralogical patterns in a Precambrian stratiform gold occurrence, Yavapai County, Arizona, in Hausen, D.M., and Parks, W.C., eds., Process Metallurgy: New York, American Institute of Mining, Metallurgical, and Petroleum Engineers, Proceedings of the 110th A.I.M.E. Annual Meeting, Chicago, Illinois, Feb. 22-26, 1981, p. 143-157.

    ABS
    A stratiform gold occurrence of Precambrian age located 20 milessoutheast of Prescott, Arizona, within the Agua Fria Mining District,displays chemical, mineralogical, structural and lithological patternsindicative of a distal, exhalative volcanogenic environment. Metavolcanicand metasedimentary rocks of the Proterozoic Yavapai Series (1775-1820 m.y.)host the mineralization and are characterized by greenschist grade metamorphism,steeply-plunging penetrative folds and steeply-dipping schistosity.Mineralization is confined to a 100m thick stratigraphic section that iscomprised of a series of thin auriferous massive sulfide beds• and intercalatedschist containing disseminated sulfides. The mineralization extendsmore than 4km along strike. Coincident with ,and largely confined to themineralized strata, are anomalous amounts of As, Sb, Cu, Pb, Zn and Ag andassociated silicification, sericiti2;ation and carbonatization. This exhalativemineralized system is interpreted to have been deposited in apaleotopographic low on the distal flank of a submarine rhyolite dome andto represent the final episode of a Precambrian volcanic cycle.

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