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dc.contributor.advisorHolley, Elizabeth A.
dc.contributor.authorLowe, Justin
dc.date.accessioned2019-02-12T18:04:04Z
dc.date.accessioned2022-02-03T13:16:29Z
dc.date.available2019-02-12T18:04:04Z
dc.date.available2022-02-03T13:16:29Z
dc.date.issued2019
dc.identifierLowe_mines_0052N_11662.pdf
dc.identifierT 8654
dc.identifier.urihttps://hdl.handle.net/11124/172843
dc.descriptionIncludes bibliographical references.
dc.description2019 Spring.
dc.description.abstractThe Lone Tree gold deposit, located in the Battle Mountain district in Humboldt County, Nevada, is hosted in siliciclastic rocks positioned stratigraphically above the Roberts Mountains thrust fault. The gold mineralization is spatially associated with and cross-cuts several rhyolite dikes in the mine. Both the dikes and siliciclastic host rocks are variably argillized, sericitized, and silicified. The gold mineralization is associated with an alteration assemblage of quartz, sericite, pyrite, and arsenopyrite. Clay alteration and dolomitization were also observed with the gold mineralization. The strongest geochemical correlations to the gold mineralization are silver, arsenic, antimony, copper, and mercury. Electron microprobe characterization of sulfides at Lone Tree identified gold-bearing arsenopyrite, pyrite, and sphalerite. Arsenopyrite was the most common ore mineral and showed the highest gold grades. The ore texture is commonly gold-rich arsenopyrite rims around less mineralized pyrite cores, which are disseminated throughout the host rock and in veinlets and breccias. Chalcopyrite, tennantite and most of the sphalerite does not contain detectable gold, whereas most of the pyrite and arsenopyrite was above the EMP detection limit with respect to gold. Although most of the gold occurs in the quartz and sulfide breccia veins, some gold also occurs in rhyolitic dikes crosscutting the sedimentary rocks, with elevated grades at the dike margins where alteration is strongest. CA-TIMS analysis of zircon grains indicate that the intrusions were emplaced during the Eocene (40.95 ± 0.03 Ma), providing a maximum age of mineralization.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.rightsCopyright of the original work is retained by the author.
dc.subjectCarlin-type
dc.subjectgold
dc.subjectBattle Mountain
dc.subjectNevada
dc.subjectdistal-disseminated
dc.titlePetrographic, geochemical, and geochronological investigation of gold mineralization at the Lone Tree gold mine, Battle Mountain, Nevada, A
dc.typeText
dc.contributor.committeememberKuiper, Yvette
dc.contributor.committeememberPfaff, Katharina
thesis.degree.nameMaster of Science (M.S.)
thesis.degree.levelMasters
thesis.degree.disciplineGeology and Geological Engineering
thesis.degree.grantorColorado School of Mines


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