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Full-Text Articles in Physical Sciences and Mathematics
Holocene Earthquakes And Late Pleistocene Slip Rate Estimates On The Wassuk Range Fault Zone, Nevada, Usa, J. M. Bormann, Benjamin E. Surpless, M. W. Caffee, S. G. Wesnousky
Holocene Earthquakes And Late Pleistocene Slip Rate Estimates On The Wassuk Range Fault Zone, Nevada, Usa, J. M. Bormann, Benjamin E. Surpless, M. W. Caffee, S. G. Wesnousky
Geosciences Faculty Research
The Wassuk Range fault zone is an 80‐km‐long, east‐dipping, high‐angle normal fault that flanks the eastern margin of the Wassuk Range in central Nevada. Observations from two alluvial fan systems truncated by the fault yield information on the vertical slip rate and Holocene earthquake history along the range front. At the apex of the Rose Creek alluvial fan, radiocarbon dating of offset stratigraphy exposed in two fault trenches shows that multiple earthquakes resulted in 7.0 m of vertical offset along the fault since ∼9400 cal B.P. These data yield a Holocene vertical slip rate of 0.7±0.1 mm/yr. The south trench …
A Detailed Record Of Shallow Hydrothermal Fluid Flow In The Sierra Nevada Magmatic Arc From Low-Δ18o Skarn Garnets, M. E. D'Errico, J. S. Lackey, Benjamin E. Surpless, S. L. Loewy, J. L. Wooden, J. D. Barnes, A. Strickland, J. W. Valley
A Detailed Record Of Shallow Hydrothermal Fluid Flow In The Sierra Nevada Magmatic Arc From Low-Δ18o Skarn Garnets, M. E. D'Errico, J. S. Lackey, Benjamin E. Surpless, S. L. Loewy, J. L. Wooden, J. D. Barnes, A. Strickland, J. W. Valley
Geosciences Faculty Research
Garnet from skarns exposed at Empire Mountain, Sierra Nevada (California, United States) batholith, have variable δ18O values including the lowest known δ18O values of skarn garnet (–4.0‰) in North America. Such values indicate that surface-derived meteoric water was a significant component of the fluid budget of the skarn-forming hydrothermal system, which developed in response to shallow emplacement (∼3.3 km) of the 109 Ma quartz diorite of Empire Mountain. Values of δ18O, measured in situ across single garnet crystals by secondary ion mass spectrometry, vary considerably (up to 7‰) and sometimes abruptly, indicating variable mixing …