Geophysical Investigations of Concealed Faults Near Yucca Mountain, Southwest Nevada

by D. A. Ponce, U.S. Geological Survey, Menlo Park, United States,

Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1993


Detailed gravity and ground magnetic data collected along surveyed traverses across Midway Valley, on the eastern flank of Yucca Mountain, Nevada reveal that these methods can be used to delineate concealed faults. These studies are part of an effort to evaluate faulting in the vicinity of the proposed surface facilities for a potential nuclear waste repository at Yucca Mountain. The largest gravity and magnetic anomaly in the vicinity of Midway Valley is associated with the Paintbrush fault on the west flank of Alice Ridge. Geophysical data infer a vertical offset of about 200 m (650 ft). Another prominent gravity and magnetic anomaly is associated with the Bow Ridge fault in the western part of Midway Valley.

Subject Headings: Radioactive wastes | Magnetic fields | Geophysical surveys | Geology | Waste disposal | Storage facilities | Data collection | Surveying methods | Nevada | United States

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