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3 edition of Stratigraphic relations and hydrologic properties of the Paintbrush Tuff nonwelded (PTn) hydrologic unit, Yucca Mountain, Nevada found in the catalog.

Stratigraphic relations and hydrologic properties of the Paintbrush Tuff nonwelded (PTn) hydrologic unit, Yucca Mountain, Nevada

Stratigraphic relations and hydrologic properties of the Paintbrush Tuff nonwelded (PTn) hydrologic unit, Yucca Mountain, Nevada

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Published by U.S. Geological Survey, Branch of Information Services [distributor] in Denver, Colo .
Written in English

    Subjects:
  • Hydrogeology -- Nevada -- Yucca Mountain Region.,
  • Groundwater flow -- Nevada -- Yucca Mountain Region.,
  • Porosity.,
  • Yucca Mountain (Nev.)

  • Edition Notes

    Statementby Thomas C. Moyer, Jeffrey K. Geslin, and Lorraine E. Flint ; prepared in cooperation with the Nevada Operations Office, U.S. Department of Energy.
    SeriesU.S. Geological Survey open-file report -- 95-397.
    ContributionsGeslin, Jeffrey K., Flint, Lorraine E., United States. Dept. of Energy. Nevada Operations Office., Geological Survey (U.S.)
    The Physical Object
    FormatMicroform
    Paginationvi, 151 p.
    Number of Pages151
    ID Numbers
    Open LibraryOL17695372M

    Hydrologic properties have been measured on outcrop samples taken from a detailed, two-dimensional grid covering a km outcrop exposure of the m thick nonwelded-to-welded, shardy base microstratigraphic unit of the Tiva Canyon Member of the Paintbrush Tuff of Miocene age at Yucca Mountain, Nevada. Paintbrush nonwelded (PTn) Bedded tuff: ptn Paintbrush nonwelded (PTn) dependent on the thickness of geological layers in an effort to reserve the stratigraphic information or actual thickness of the geological layers. We have conducted many more numerical experiements on grid refinement versus capturing capillary effects and found that Cited by:

    which, in turn, are enclosed within nonwelded zones of variable thickness (Smith, ). Varia­ tions in welding characteristics are generally transitional, whereas the contacts between ash flows and underlying bedded tuffs are quite abrupt. Two other ash-flow tuff members of the Paintbrush Tuff, the Yucca Mountain and Pah CanyonCited by: 1. Introduction. Characterization of fractures is fundamental to numerical modeling studies aimed at assessing subsurface flow and transport processes at Yucca Mountain, Nevada Bodvarsson et al., , Bodvarsson et al., , Liu et al., Fractures are important structural discontinuities within the variably welded tuffs at Yucca Mountain, providing highly permeable pathways for air Cited by:

    Physical and hydrologic properties of outcrop samples from a nonwelded to welded tuff transition, Yucca Mountain, Nevada [] Denver, Colo.: U.S. Dept. of the Interior, U.S. Geological Survey: Earth Science Information Center, Open-File Reports Section [distributor], The intervening, largely nonwelded to partially welded Yucca Mountain and Pah Canyon Tuffs, along with basal Tiva Canyon Tuff and uppermost Topopah Spring Tuff, have been grouped together as the Paintbrush Tuff nonwelded (PTn) hydrogeologic unit (Moyer et al., ) which has relatively high matrix permeability and low fracture by:


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Stratigraphic relations and hydrologic properties of the Paintbrush Tuff nonwelded (PTn) hydrologic unit, Yucca Mountain, Nevada Download PDF EPUB FB2

Determining fracture properties, such as fracture spacing, fracture orientation, and fracture aperture, is essential to fully understanding the hydrologic properties of tuffs; however, the most complete measurements of fractures in tuffs are from outcrop studies presented elsewhere in this book (see Chapterthis volume).

Get this from a library. Stratigraphic relations and hydrologic properties of the Paintbrush Tuff nonwelded (PTn) hydrologic unit, Yucca Mountain, Nevada. [Thomas C Moyer; Jeffrey K Geslin; Lorraine E Flint; United States.

Department of Energy. Nevada Operations Office.; Geological Survey (U.S.)]. Stratigraphic Relations and Hydrologic Properties of the Paintbrush Tuff Nonwelded (PTn) Hydrologic Unit, Yucca Mountain, Nevada By T.C.

Moyer, J.K. Geslin and L.E. Flint No static citation data No static citation data CiteCited by: 1. From bottom to top, the stratigraphy of the tuff includes nonwelded Unit 1, partially covered by Quaternary talus and consisting of glassy and vapor-phase altered portions.

Unit 2 is moderately welded and overlain by a nonwelded transition into Unit 3 (partially welded), which is in turn overlain by Quaternary alluvium. Closest to the surface is the welded Tiva Canyon Tuffs, followed sequentially by the Yucca Mountain, Pah Canyon, and the Topopah Spring Tuffs of the Paintbrush Group.

The nonwelded tuffs of the Paintbrush group (PTn) lie immediately above the welded tuff of the Topopah Spring Tuff (TSw), the host rock for the potential nuclear waste by: Stratigraphic relations and hydrologic properties of the Paintbrush Tuff nonwelded (PTn) hydrologic unit, Yucca Mountain, Nevada U.S.

Geological Survey Open-File Report Cited by: Borehole NRG-6 was selected because it provides a relatively complete stratigraphic section from the lower part of the Tiva Canyon Tuff through most of the lower lithophysal zone of the Topopah Spring Tuff of the Paintbrush Group.

Depths ranged from to m (– ft). Physical and hydrologic properties of outcrop samples from a nonwelded to welded tuff transition, Yucca Mountain, Nevada Article (PDF Available) January with 13 Reads How we measure 'reads'.

welding, physical properties, and extent of alteration. The uppermost member f the Paintbrush Tuff, the Tiva Canyon Member, caps most of Yucca Mountain to a thickness of approximately m or more. Below this cap, the densely welded, m-thick, Topopah Spring Member of the Paintbrush Tuff,Cited by: Stratigraphic and structural setting, Yucca Mountain Fracture characteristics in the ignimbrites are primarily controlled by variations in degree of welding and crystallization.

Nonwelded units have low fracture density but are cut by numerous small-offset faults, which represent these units' response to intrablock stress. Stratigraphic relations and hydrologic properties of the Paintbrush Tuff nonwelded (PTn) hydrologic unit, ().

A continuum model for water movement in an unsaturated fractured rock mass. PDF | On Jan 1,Rebecca C. Smyth and others published Chapter The hydrology of tuffs | Find, read and cite all the research you need on ResearchGate.

Tiva Canyon Tuff of the Paintbrush Group, (2) the Paintbrush nonwelded (PTn) unit, consisting of the variably welded Paint- brush and its associated bedded tuffs, including those located at the bottom of the Tiva Canyon and top of the Topopah Spring Tuffs, (3) the Topopah Spring welded (TSw) unit, con-Cited by: Stratigraphic Relations and Hydrologic Properties of the Paintbrush Tuff Nonwelded (PTn) Hydrologic Unit, Yucca Mountain, Nevada: US Geol.

Surv. Open-File Rep. Google Scholar National Research Council, Cited by: Characterization of Unsaturated Zone Hydrogeologic Units using Matrix Properties and. Paintbrush nonwelded (PTn), variability in hydrologic properties of a volcanic tuff.

Ground Water. Physical and Hydrologic Properties of Rock Outcrop Samples at Yucca Mountain, Nevada physical and hydrologic properties measured on out­ crop samples can be predicted in boreholes (Istok and nonwelded pumice and tuff.

The Paintbrush Group is composed of two major thick flow units, the Tiva Cited by: 5. A data set was developed from laboratory measurements of physical and hydrologic proper- ties of surface outcrop samples collected from eight transects at Yucca Mountain, Nevada.

Transects were located to represent the vertical and spatial variability of nonwelded and welded tuffs in major flow units. The intent of this study was to clarify stratigraphic relations within the Paintbrush Tuff (PTn) unit at Yucca Mountain in order to better understand vertical and lateral variations in hydrologic.

Hydrogeologic properties of these units were presented by Flint () and will not be discussed here, except to make specific mention of the Paintbrush Tuff nonwelded hydrogeologic unit (PTn; see Fig.

3), which is of special interest to stratigraphic and hydrologic studies in the site area. The magnitude of lateral flow caused by permeability and capillary barriers associated with dipping, layered, nonwelded tuffs above the proposed repository horizon is an important issue for evaluating the amount and distribution of water potentially contacting high-level radioactive waste proposed for emplacement at Yucca Mountain, Nevada.

Deformation-induced secondary heterogeneities associated with a steeply-dipping normal fault in the nonwelded Bishop Tuff were examined in a multidisciplinary study using in situ gas permeability tests, structural mapping.1) Stratigraphic Relations and Hydrologic Properties of the Paintbrush Tuff Nonwelded (PTn) Hydrologic Unit, Yucca Mountain, Nevada (Study Plan"Characterization of the Vertical and Lateral Distribution of Stratigraphic Units within the Site Area") The technical specialist reviewed stratigraphic sections in the field and core.[12] The Paintbrush nonwelded hydrogeologic unit (PTn) of Montazer and Wilson is described as consisting of the nonwelded and partially welded base of the Tiva Canyon Tuff, the Yucca Mountain and Pah Canyon Tuffs, the upper nonwelded and partially welded upper part of the Topopah Spring Tuff, and the associated bedded tuffs.

It consists of thin Cited by: