Geology and mineralization of the southeastern Gillis Range, Mineral County, Nevada
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Authors
Smith, Michael Roy
Issue Date
1981
Type
Thesis
Language
en_US
Keywords
Fitting District , Gillis Range , Mineral county , Nevada , Upper Triassic Luning Formation Sediments , Jurassic Dunlap Formation Sediments , Luning Formation Rocks , Cretaceous Dioritic , Granitic Rocks , Cenozoic Volcanic Rocks , Sedimentary Rocks , Mineralizations , Skarn Deposits , Minor Quartz-sulphide Veins , Thorium/uranium-bearing Pegmatite-like Occurrences , Tungsten Skarns , Copper-bearing Skarn Vein , Andesitic Tuffs , Discontinuous Meta-somatic Zones , Scapolite Zones , Grandite Zones , Copper-bearing Skarn Veins , Metasomatic Zones , Andraditic Grandite , Diopsidic Pyroxene , Mackay Theses and Dissertations Grant Collection
Alternative Title
Abstract
Geological studies in the eastern part of the Fitting District, which is located in the southern Gillis Range, Mineral County, Nevada, revealed the presence of Upper Triassic Luning Formation sediments, Jurassic Dunlap Formation sediments (which are thrust upon Luning Formation rocks), Cretaceous dioritic to granitic rocks, and assorted Cenozoic volcanic and sedimentary rocks. Several types of mineralization were observed, including significant skarn deposits, and minor quartz-sulphide veins and thorium/uranium-bearing pegmatite-like occurrences. Tungsten- and copper-bearing bedding-controlled skarn veins occur at the White Hills claims. The tungsten skarns replace potassically altered andesitic tuffs; up to two discontinuous meta- somatic zones are present: an early formed scapolite zone and a later grandite (Ad10_25) zone. Tungsten mineralization is confined to the grandite zone. The copper-bearing skarn veins replace calc-silicate hornfels; up to four metasomatic zones are present: the later-formed zones contain more andraditic grandite and more diopsidic pyroxene than early-formed zones.
Description
Theses Number: 1585.
Online access for this thesis was created in part with support from the Institute of Museum and Library Services (IMLS) administered by the Nevada State Library, Archives and Public Records through the Library Services and Technology Act (LSTA). To obtain a high quality image or document please contact the DeLaMare Library at https://unr.libanswers.com/ or call: 775-784-6945.
Online access for this thesis was created in part with support from the Institute of Museum and Library Services (IMLS) administered by the Nevada State Library, Archives and Public Records through the Library Services and Technology Act (LSTA). To obtain a high quality image or document please contact the DeLaMare Library at https://unr.libanswers.com/ or call: 775-784-6945.
Citation
Publisher
University of Nevada, Reno
License
In Copyright(All Rights Reserved)