Bedrock geologic Map of the Central Block Area, Yucca Mountain, Nye County, Nevada

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Description

Bedrock geologic maps form the foundation for investigations that characterize and assess the viability of the potential high-level radioactive waste repository at Yucca Mountain, Nevada. As such, this map focuses on the central block at Yucca Mountain, which contains the potential repository site. The central block is a structural block of Tertiary volcanic rocks bound on the west by the Solitario Canyon Fault, on the east by the Bow Ridge Fault, to the north by the northwest-striking Drill Hole Wash Fault, and on the south by Abandoned Wash. Earlier reconnaissance mapping by Lipman and McKay (1965) provided an overview of ... continued below

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19 pages

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Day, W.C.; Potter, C.; Sweetkind, D.; Dickerson, R.P. & Juan, C.A. San September 29, 1998.

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Description

Bedrock geologic maps form the foundation for investigations that characterize and assess the viability of the potential high-level radioactive waste repository at Yucca Mountain, Nevada. As such, this map focuses on the central block at Yucca Mountain, which contains the potential repository site. The central block is a structural block of Tertiary volcanic rocks bound on the west by the Solitario Canyon Fault, on the east by the Bow Ridge Fault, to the north by the northwest-striking Drill Hole Wash Fault, and on the south by Abandoned Wash. Earlier reconnaissance mapping by Lipman and McKay (1965) provided an overview of the structural setting of Yucca Mountain and formed the foundation for selecting Yucca Mountain as a site for further investigation. They delineated the main block-bounding faults and some of the intrablock faults and outlined the zoned compositional nature of the tuff units that underlie Yucca Mountain. Scott and Bonk (1984) provided a detailed reconnaissance geologic map of favorable area at Yucca Mountain in which to conduct further site-characterization studies. Of their many contributions, they presented a detailed stratigraphy for the volcanic units, defined several other block-bounding faults, and outlined numerous intrablock faults. This study was funded by the U.S. Department of Energy Yucca Mountain Project to provide a detailed (1:6,000-scale) bedrock geologic map for the area within and adjacent to the potential repository area at Yucca Mountain, Nye County, Nevada. Prior to this study, the 1:12,000-scale map of Scott and Bonk (1984) was the primary source of bedrock geologic data for the Yucca Mountain Project. However, targeted detailed mapping within the central block at Yucca Mountain revealed structural complexities along some of the intrablock faults that were not evident at 1:12,000 (Scott and Bonk, 1984). As a result, this study was undertaken to define the character and extent of the dominant structural features in the vicinity of the potential repository. In addition to structural considerations, ongoing subsurface excavation and geologic mapping within the Exploratory Studies Facility (ESF), development of a three-dimensional-framework geologic model, and borehole investigations required use of a consistent stratigraphic system to facilitate surface to underground comparisons. The map units depicted in this report correspond as closely as possible to the proposed stratigraphic nomenclature by Buesch and others (1996), as described.

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19 pages

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INIS; OSTI as DE00839536

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  • Other Information: PBD: 29 Sep 1998

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  • Report No.: MAP I-2601
  • Grant Number: NONE
  • DOI: 10.2172/839536 | External Link
  • Office of Scientific & Technical Information Report Number: 839536
  • Archival Resource Key: ark:/67531/metadc789105

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

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Creation Date

  • September 29, 1998

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • March 11, 2016, 1:51 p.m.

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Day, W.C.; Potter, C.; Sweetkind, D.; Dickerson, R.P. & Juan, C.A. San. Bedrock geologic Map of the Central Block Area, Yucca Mountain, Nye County, Nevada, report, September 29, 1998; Las Vegas, Nevada. (digital.library.unt.edu/ark:/67531/metadc789105/: accessed November 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.