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Testing for fault activity at Yucca Mountain, Nevada, using independent GPS results from the BARGEN network.

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Testing for fault activity at Yucca Mountain, Nevada, using independent GPS results from the BARGEN network.

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Title: Testing for fault activity at Yucca Mountain, Nevada, using independent GPS results from the BARGEN network.
Author: Hill, Emma M.; Blewitt, Geoffrey.
Copyright year: 2006
Abstract: Data from BARGEN GPS stations around Yucca Mountain (YM) have been independently processed using GIPSY-OASIS and GAMIT/GLOBK. The RMS velocity differences between these solutions is 0.06 mm/yr ( east component) and 0.10 mm/yr ( north), indicating an ability to resolve tectonic signals > 0.3 mm/yr with high confidence. Inversion of GPS station velocities for Eastern California Shear Zone (ECSZ) fault parameters produces an unreasonably deep locking depth of similar to 30 km for the Death Valley-Furnace Creek fault system, contradicting seismological evidence. The GPS cluster locally west of YM observes a strain rate of 17.0 +/- 1.8 ns/yr, marginally higher than our ECSZ model predicts (13.9 +/- 0.7 ns/yr). Significantly, the cluster to the east observes 22.3 +/- 2.1 ns/yr, which is 6.2 sigma higher than the model (8.6 +/- 0.7 ns/yr), suggesting that additional sources of strain more local to YM (< 30 km) are currently active, collectively accumulating > 0.7 mm/yr.
Subject: DRNTU::Science::Geology.
Type: Journal Article
Series/ Journal Title: Geophysical research letters
Rights: © 2006 American Geophysical Union.This paper was published in Geophysical Research Letters and is made available as an electronic reprint (preprint) with permission of American Geophysical Union. The paper can be found at the following official URL: http://dx.doi.org/10.1029/2006GL026140. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Version: Published version

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