Effects of magmatic processes on the potential Yucca Mountain repository: Field and computational studies

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Assessing the risk of future magmatic activity at a potential Yucca Mountain radioactive waste repository requires, in addition to event probabilities, some knowledge of the consequences of such activity. Magmatic consequences are divided into an eruptive component, which pertains to the possibility of radioactive waste being erupted onto the surface of Yucca Mountain, and a subsurface component, which occurs whether there is an accompanying eruption or not. The subsurface component pertains to a suite of processes such as hydrothermal activity, changes in country rock properties, and long term alteration of the hydrologic flow field which change the waste isolation system. ... continued below

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27 p.

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Valentine, G.A.; Groves, K.R.; Gable, C.W.; Perry, F.V. & Crowe, B.M. October 1, 1993.

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Description

Assessing the risk of future magmatic activity at a potential Yucca Mountain radioactive waste repository requires, in addition to event probabilities, some knowledge of the consequences of such activity. Magmatic consequences are divided into an eruptive component, which pertains to the possibility of radioactive waste being erupted onto the surface of Yucca Mountain, and a subsurface component, which occurs whether there is an accompanying eruption or not. The subsurface component pertains to a suite of processes such as hydrothermal activity, changes in country rock properties, and long term alteration of the hydrologic flow field which change the waste isolation system. This paper is the second in a series describing progress on studies of the effects of magmatic activity. We describe initial results of field analog studies at small volume basaltic centers where detailed measurements are being conducted of the amount of wall rock debris that can be erupted as a function of depth in the volcanic plumbing system. Constraints from field evidence of wall rock entrainment mechanisms are also discussed. Evidence is described for a mechanism of producing subhorizontal sills versus subvertical dikes, an issue that is important for assessing subsurface effects. Finally, new modeling techniques, which are being developed in order to capture the three dimensional complexities of real geologic situations in subsurface effects, are described.

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27 p.

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INIS; OSTI as DE94000896

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  • Focus 93: site characterization and model validation, Las Vegas, NV (United States), 26-29 Sep 1993

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  • Other: DE94000896
  • Report No.: LA-UR--93-3299
  • Report No.: CONF-9309228--2
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 140061
  • Archival Resource Key: ark:/67531/metadc618705

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Office of Scientific & Technical Information Technical Reports

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

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  • October 1, 1993

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 29, 2016, 2:18 p.m.

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Valentine, G.A.; Groves, K.R.; Gable, C.W.; Perry, F.V. & Crowe, B.M. Effects of magmatic processes on the potential Yucca Mountain repository: Field and computational studies, article, October 1, 1993; New Mexico. (digital.library.unt.edu/ark:/67531/metadc618705/: accessed April 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.