Fracture coatings in Topopah Spring Tuff along drill hole wash

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Fracture-lining minerals are being studied as part of site characterization to determine the suitability of Yucca Mountain, Nevada as a potential high level nuclear waste repository. Fracture coatings in the Paintbrush Group provide information on potential flow paths above the water table both toward and away from the potential repository and provide information on the distribution of fracture-lining minerals needed to model thermal effects of waste emplacement. Fracture coatings within the predominantly non-zeolitic Paintbrush Group vary both with depth and laterally across Yucca Mountain, whereas fracture coatings in tuffs below the Paintbrush Group are related to the mineralogy of the ... continued below

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5 p.

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Carlos, B.A.; Chipera, S.J. & Bish, D.L. December 1, 1994.

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Description

Fracture-lining minerals are being studied as part of site characterization to determine the suitability of Yucca Mountain, Nevada as a potential high level nuclear waste repository. Fracture coatings in the Paintbrush Group provide information on potential flow paths above the water table both toward and away from the potential repository and provide information on the distribution of fracture-lining minerals needed to model thermal effects of waste emplacement. Fracture coatings within the predominantly non-zeolitic Paintbrush Group vary both with depth and laterally across Yucca Mountain, whereas fracture coatings in tuffs below the Paintbrush Group are related to the mineralogy of the tuffs and follow a consistent pattern of distribution with predominantly quartz, calcite, and manganese oxides in the devitrified intervals and mordenite and clinoptilolite in the zeolitic intervals. The zeolites stellerite and heulandite are more abundant in fractures in the Topopah Spring Tuff in drill holes USW G-1 and UE-25 a{number_sign}l, located along Drill Hole Wash (at the northern end of Yucca Mountain) than in core from other parts of Yucca Mountain. Buesch et al. (2) present evidence for a complex fault system along Drill Hole Wash. To investigate the possibility that the abundant fracture-lining zeolites in USW G-1 and UE-25 a{number_sign} 1 are related to the Drill Hole Wash fault, the Topopah Spring Tuff was examined in drill cores from USW UZ-14, USW G-1, USW NRG-7/7a, and UE-25 a{number_sign}l.

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5 p.

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INIS; OSTI as DE95003692

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  • International high-level radioactive waste management conference: progress toward understanding, Las Vegas, NV (United States), 1-5 May 1995

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  • Other: DE95003692
  • Report No.: LA-UR--94-3820
  • Report No.: CONF-950570--1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 30271
  • Archival Resource Key: ark:/67531/metadc684029

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  • December 1, 1994

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 29, 2016, 3:14 p.m.

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Carlos, B.A.; Chipera, S.J. & Bish, D.L. Fracture coatings in Topopah Spring Tuff along drill hole wash, article, December 1, 1994; New Mexico. (digital.library.unt.edu/ark:/67531/metadc684029/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.