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Structural Character of the Ghost Dance Fault, Yucca Mountain, Nevada

by R. W. Spengler, U.S. Geological Survey, Denver, United States,
C. A. Braun, U.S. Geological Survey, Denver, United States,
R. M. Linden, U.S. Geological Survey, Denver, United States,
L. G. Martin, U.S. Geological Survey, Denver, United States,
D. M. Ross-Brown, U.S. Geological Survey, Denver, United States,
R. L. Blackburn, U.S. Geological Survey, Denver, United States,



Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1993

Abstract:

Detailed structural mapping of an area that straddles the southern part of the Ghost Dance Fault has revealed the presence of several additional subparallel to anastomosing faults. These faults, mapped at a scale of 1:240, are: 1) dominantly north trending, 2) present on both the upthrown and downthrown sides of the surface trace of the Ghost Dance fault, 3) near-vertical features that commonly offset strata down to the west by 3 to 6 m (10 to 20 ft), and 4) commonly spaced 15 to 46 m (50 to 150 ft) apart. The zone also exhibits a structural fabric, containing an abundance of northwest-trending fractures. The width of the zone appears to be at least 213 m (700 ft) near the southernmost boundary of the study area but remains unknown near the northern extent of the study area, where the width of the study area is only 183 m (600 ft).

Subject Headings: Radioactive wastes | Mapping | Cracking | Waste disposal | Geology | Fabric structures | Structural stability | Nevada | United States

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