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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Strain accumulation near Yucca Mountain, Nevada, 1993-1998
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Strain accumulation near Yucca Mountain, Nevada, 1993-1998

机译:1993-1998年在内华达州丝兰山附近的应变积累

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摘要

A 50-km aperture geodetic network centered on the proposed high-level radioactive waste disposal site at Yucca Mountain, Nevada, was surveyed with GPS in 1993 and 1998. The average deformation rate across the area is described by the principal strain rates 22.8 +/-8.8 nstrain yr(-1) N77.6 degreesW +/- 13.5 degrees and -8.8 +/- 11.9 nstrain yr(-1) N12.5 degreesE +/- 13.5 degrees (extension reckoned positive) and a clockwise rotation rate about a vertical axis of 9.6 +/-7.4 nrad yr(-1) relative to fixed North America. Quoted uncertainties are standard deviations. Those strain rates are consistent with the geodetic strain rates (2 +/- 12 nstrain yr(-1) N87 degrees +/- 12 degreesW and -22 +/- 12 nstrain yr(-1) N03 degrees +/- 12 degreesE) previously reported by Savage et al. [1999] for the 1983-1998 interval and with the low extension rate (5-20 nstrain yr(-1)) [Marrett et al., 1998] inferred from the geologic record. None of those strain rates is consistent with the 50 +/-9 nstrain yr(-1) N65 degreesW extension rate for the area reported by Wernicke et al. [1998]. [References: 14]
机译:1993年和1998年使用GPS对以内华达州尤卡山拟议的高放射性废物处置场为中心的50公里孔径大地测量网络进行了测量。该区域的平均变形率由主应变率22.8 + /来描述。 -8.8 nstrain yr(-1)N77.6度W +/- 13.5度和-8.8 +/- 11.9 nstrain yr(-1)N12.5度E +/- 13.5度(扩展为正数),顺时针旋转速度约为垂直轴相对于固定的北美9.6 +/- 7.4 nrad yr(-1)。引用的不确定度是标准偏差。这些应变率与大地应变率一致(2 +/- 12 nstrain yr(-1)N87度+/- 12度W和-22 +/- 12 nstrain yr(-1)N03度+/- 12度E)先前由Savage等报道。 [1999]对于1983-1998年的间隔和低扩展率(5-20​​ nstrain yr(-1))[Marrett et al。,1998]从地质记录中推断。这些应变率均与Wernicke等人报道的区域的50 +/- 9 nstrain yr(-1)N65度W扩展率不一致。 [1998]。 [参考:14]

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