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.
|Advisor:||Holk, Gregory J.|
|School:||California State University, Long Beach|
|School Location:||United States -- California|
|Source:||MAI 48/04M, Masters Abstracts International|
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