Geophysical borehole logging in the unsaturated zone, Yucca Mountain, Nevada

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Edited by: Anon


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Borehole geophysical logging for site characterization in the volcanic rocks at the proposed nuclear waste repository at Yucca Mountain, Nevada, requires data collection under rather unusual conditions. Logging tools must operate in rugose, dry holes above the water table in the unsaturated zone. Not all logging tools will operate in this environment, therefore; careful consideration must be given to selection and calibration. A sample suite of logs is presented that demonstrates correlation of geological formations from borehole to borehole, the definition of zones of altered mineralogy, and the quantitative estimates of rock properties. We show the results of an exploratory calculation of porosity and water saturation based upon density and epithermal neutron logs. Comparison of the results with a few core samples is encouraging, particularly because the logs can provide continuous data in boreholes where core samples are not available.
Publication type Conference Paper
Publication Subtype Conference Paper
Title Geophysical borehole logging in the unsaturated zone, Yucca Mountain, Nevada
ISBN 0872628310
Year Published 1991
Language English
Publisher Publ by ASCE
Publisher location New York, NY, United States
Larger Work Title High Level Radioactive Waste Management
First page 795
Last page 801
Conference Title Proceedings of the 2nd Annual International Conference on High Level Radioactive Waste Management
Conference Location Las Vegas, NV, USA
Conference Date 28 April 1991 through 3 May 1991
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