Geology, alteration, and mineralization at the Western World Lakes Cu-Zn prospect, Yuba County, California
AuthorParr, Andrew J.
AdvisorLarson, L. T.
Geological Sciences and Engineering
AltmetricsView Usage Statistics
The Lower Volcanic Unit of the Jurassic aged Smartville Complex hosts the Western World Lakes massive sulfide deposit and other mineral prospects. The complex is a sequence of volcanoclastic sediments, pillowed lavas, sheeted dikes, and plutonic rocks similar to ophiolites found worldwide. At least four metamorphic and alteration events were responsible for the prehnite-pumpellyite metamorphic mineral assemblage developed in the complex. All lavas near the massive sulfide deposit are metamorphosed to a greenschist facies metamorphic mineral assemblage. Weakly altered Footwall unit lavas are locally sodium depleted and copper and zinc enriched. Strongly altered sodium depleted lavas are more abundant in the Gossan Hill unit and are weakly copper depleted. The massive sulfide body consists of primary pyrite, chalcopyrite, sphalerite, tetrahedrite, galena, hematite, pyrrhotite, electrum, and secondary covellite, bornite, chalcocite, and digenite. The massive sulfide, alteration, and metamorphism exhibit characteristics diagnostic of volcanogenic style mineralization.
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.
SubjectWestern World lakes
prehnite-pumpellyite metamorphic mineral assemblages
Western World Lakes Cu-Zn Prospect
Mackay Science Project
Showing items related by title, author, creator and subject.
.Wallace, Andy Bert (University of Nevada, Reno, 1975)The Pyramid district is thirty miles north-northeast of Reno, Nevada in the northern Pah Rah Range. Known mineralization in the district is confined to west and northwest trending veins along fracture zones and faults ...
.Barnes, James I. (University of Nevada, Reno, 1971)A method for determining the mercury content of soil gas has been developed and demonstrated. Additionally, resulting data shows a correlation between pronounced mercury accumulations and known copper, gold, molybdenum or ...
Alteration and mineralization of the northern half of the Aurora mining district, Mineral County, Nevada Osborne, Marla A (University of Nevada, Reno, 1985)Alteration and mineralization of the Aurora Mining District has been studied. Epithermal precious metal mineralization of the district is confined to 10.3 m. y. old quartz adularia veins in altered andesite. Alteration ...