Dissertation/Thesis Abstract

A stable isotope study of the southern White Pine Range, East-Central Nevada
by Toneva, Denitsa Stoyanova, M.S., California State University, Long Beach, 2009, 134; 1481597
Abstract (Summary)

Stable isotope results indicate a complex history of hydrothermal activity during brittle deformation and magma intrusion into the lower plate of the recently defined Currant Gap detachment fault at the southern White Pine Range, East-Central Nevada Circulation of large amounts of meteoric-hydrothermal fluids through the entire complex is indicated by (1) low muscovite δD values from altered intrusive rocks, (2) low vein calcite δ18 O values from the upper plate, (3) lower plate vein calcite δ 18O values as low as -4.4‰, and (4) low vein and host-rock calcite δ18O values within the detachment fault zone. High biotite δD values from some intrusions and the high δ 18O values of some veins proximal to the sills indicate the involvement of magmatic waters. Higher and less variable host-rock carbonate δ 18O values suggest a channelized fracture-controlled flow system during detachment faulting.

Indexing (document details)
Advisor: Holk, Gregory J.
School: California State University, Long Beach
School Location: United States -- California
Source: MAI 48/04M, Masters Abstracts International
Subjects: Geology, Geochemistry
Publication Number: 1481597
ISBN: 978-1-109-65818-7
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