Structural control, alteration and primary mineralization at the Big Springs gold mine, Elko County, Nevada
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Authors
Youngerman, Alan G
Issue Date
1992
Type
Thesis
Language
en_US
Keywords
Big Springs Mine , Independence Mountains , Elko County , Nevada , Sediment Hosted Disseminated Gold Deposit , Pennsylvania Age Siltstones , Mississippian Age Siltstones , Schoonover Formation , Gold Mineralization , Ore Structures , Faults , Pre-basin Extension , Range Extension , Dolomitization , Sericitization , Decalcification , Silicification , Gold , Free Grains , Arsenical Pyrite , Silica , Siltstone Matrix , Arsenic , Antimony , Mercury , Thallium , Cadmium , Thallium , Mackay Theses and Dissertations Grant Collection
Alternative Title
Abstract
The Big Springs Gold Mine is located in the Independence Mountains in northern Elko County. The mine is a sediment hosted disseminated gold deposit within Pennsylvanian to Mississippian age siltstones of the Schoonover formation. Gold mineralization is tightly structurally controlled. Ore structures are predominately east-west striking north dipping normal faults formed during Pre-Basin and Range extension. Alteration consists of dolomitization, sericitization, decalcification, and silicification. Gold is deposited syn or post genetically with decalcification and silicification. Gold occurs as free grains, up to seven microns in size, within the edges of arsenical pyrite as well as encapsulated in silica within the siltstone matrix. Arsenic, antimony, mercury, thallium, and cadmium are all associated with gold in the ore zones with cadmium and thallium showing the best correlation to gold.
Description
Thesis Number: 2979.
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)