Water-table fluctuations in the Amargosa Desert, Nye County, Nevada

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Pleistocene ground-water discharge deposits approximately 20 km southwest of Yucca Mountain were previously thought to represent pluvial water-table rises of 80 to 120 m. Data from new boreholes at two of the three discharge sites indicate that the modern water-table is at depths of only 17 to 30 m and that this shallow water is part of the regional ground-water flow system rather than being perched. Calcite in equilibrium with this modern ground water would have isotopic compositions similar to those in Pleistocene calcite associated with the discharge deposits. Carbon and uranium isotopes in both ground water and discharge deposits ... continued below

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4 p.

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Paces, James B. & Whelan, Joseph April 29, 2001.

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Description

Pleistocene ground-water discharge deposits approximately 20 km southwest of Yucca Mountain were previously thought to represent pluvial water-table rises of 80 to 120 m. Data from new boreholes at two of the three discharge sites indicate that the modern water-table is at depths of only 17 to 30 m and that this shallow water is part of the regional ground-water flow system rather than being perched. Calcite in equilibrium with this modern ground water would have isotopic compositions similar to those in Pleistocene calcite associated with the discharge deposits. Carbon and uranium isotopes in both ground water and discharge deposits imply that past discharge consisted of a mixture of both shallow and deep ground water. These data limit Pleistocene water-table fluctuations at the specified Amargosa Desert discharge sites to between 17 and 30 m and eliminate the need to invoke large water-table rises.

Physical Description

4 p.

Notes

INIS; OSTI as DE00794104

Medium: P; Size: 4 pages

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  • 2001 International High-Level Radioactive Waste Management Conference, Las Vegas, NV (US), 04/29/2001--05/03/2001

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  • Report No.: NONE
  • Grant Number: A108-97NV12033
  • Office of Scientific & Technical Information Report Number: 794104
  • Archival Resource Key: ark:/67531/metadc734308

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • April 29, 2001

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • April 10, 2017, 8:15 p.m.

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Paces, James B. & Whelan, Joseph. Water-table fluctuations in the Amargosa Desert, Nye County, Nevada, article, April 29, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc734308/: accessed July 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.