Dissertation/Thesis Abstract

Silica Replacement in the Southern White Pine Range, East Central Nevada: A Stable Isotope Study
by De Baun, Derik K., M.S., California State University, Long Beach, 2018, 141; 10841608
Abstract (Summary)

In the southern White Pine Range (SWPR) silica is found to have been deposited from hydrothermal solution within the Currant Gap Detachment fault (CGD). Silica has been observed to occur in three modes of deposition: (1) narrow veins within the lower plate Pole Canyon limestone, (2) bulk silicification of carbonates and (3) breccia matrix found in proximity to the CGD.

Through stable isotope analysis of oxygen from quartz samples and hydrogen from fluid inclusions we see that there is a history of meteoric waters penetrating into the Lower Pole Canyon Formation, in the lower plate of the CGD. This study reveals that silica in the SWPR formed from aqueous fluids at temperatures between 260 °C and 315 °C within lower plate quartz veins and 150 °C to 300 °C within the upper plate of the CGD. These temperature ranges are in line with what would be expected in a brittle regime (T < 350 °C).

Indexing (document details)
Advisor: Holk, Gregory J.
Commitee: Francis, Robert D., Kelty, Thomas
School: California State University, Long Beach
Department: Geological Sciences
School Location: United States -- California
Source: MAI 58/02M(E), Masters Abstracts International
Source Type: DISSERTATION
Subjects: Geology, Geochemistry
Keywords: Detachment, Isotope, Nevada, Quartzite, Silica, White pine
Publication Number: 10841608
ISBN: 978-0-438-63377-3
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