Preliminary analysis of geophysical logs from the WT series of drill holes, Yucca Mountain, Nye County, Nevada
Geophysical logs from the WT series of drill holes correlate well with similar logs from other drill holes at Yucca Mountain, Nevada, in the unsaturated zone through the same geologic units. The in-situ physical properties of the rocks from well logs are consistent with laboratory-measured physical properties of core from other drill holes. The Topopah Spring Member is concluded to have zones that are highly fractured and lithophysal in holes where the density and neutron longs are very "spiky" as noted in other cored drill holes. Low levels on the uranium trace from the spectral gamma-ray log indicate that fractures are neither healed nor filled with materials that concentrate uranium. Therefore, fracture permeability is expected to be high. This conclusion is consistent with fracture analysis from other drill holes on Yucca Mountain. The dielectric constant and dielectric resistivity logs correlate well with the epithermal neutron, borehole compensated density, and induction resistivity logs in the unsaturated zone.
- Research Organization:
- Geological Survey, Denver, CO (United States)
- DOE Contract Number:
- AI08-78ET44802
- OSTI ID:
- 59863
- Report Number(s):
- USGS-OFR--86-46; ON: DE86010153
- Country of Publication:
- United States
- Language:
- English
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