Geologic map of the Paiute Ridge quadrangle, Nye and Lincoln Counties, Nevada

Abstract

Report TEI-826 This report is preliminary and has not been edited for conformity with Geological Survey format.

A Hydrostratigraphic Model and Alternatives for the Groundwater Flow and Contaminant Transport Model of Corrective Action Unit 97: Yucca Flat-Climax Mine, Lincoln and Nye Counties, Nevada

“…Approximately 178 high-angle faults are included in the framework model (Figure 3-4). Faults are typically modeled with a 75-degree dip based on measured dips of faults exposed around Yucca Flat (which range from 50 to 85 degrees), and the stratal tilt (i.e., generally less than 15 degrees) of the Rainier Mesa and Ammonia Tanks Tuff within and along the eastern margin of the basin (Barnes et al, 1965;Byers and Barnes, 1967;and Hinrichs and McKay, 1965). Each fault typically is modeled as a single fault plane that extends to the base of the model.…”

A Natural Analogue for Thermal-Hydrological-Chemical Coupled Processes at the Proposed Nuclear Waste Repository at Yucca Mountain, Nevada

“…The intrusive complex is located in a fault-bounded valley surrounded by Paiute Ridge, Slanted Buttes, and Carbonate Ridge. The geology of the region was mapped by Byers and Barnes (1967) and remapped and studied in greater detail by Goff andothers in 1995 (Goff, 1995;Valentine et al, 1998) (Figure 1). (Sawyer et al, 199A Goff, 1995;Warren, 1995;Valentine et al, 1998).…”

“…Variable alteration associated with the original cooling of the deposits resulted in large variability in the vitric vs. zeolite content of the tuffs. The geologic map by Byers and Barnes (1967) delineates tuff stratigraphy and intrusion geometries and attempts to identify areas of "alteration" (associated with the intrusions) and "zeolitization" (of any origin). However, these characterizations must be reevaluated in light of the revised stratigraphic definitions of the study area developed by Goff and others (Goff, 1995;Valentine et al, 1998) and Warren (1995).…”

“…The age, primary mineralogy and textural character, and degree and ongin of alteration in these rocks has come into question and must be well established before meaningful interpretations can be made regarding the timing and nature of the observed alteration of the tuff (and its relationship, if any, to the intrusions). Some of the existing published research into the alteration of the tuff related to the intrusive event (Matyskiel% 1997) relied on the older map and stratigraphic designations of Byers and Barnes (1967), which has been found to be in error in several parts of the Paiute Ridge study area.…”

Map showing outcrops of basaltic rocks of early Quaternary and Tertiary age, Basin and Range Province, Nevada

“…Byers and Barnes (1967) describe unit as basalt flows and note cinder cones at base. Cross-sectional thickness is more than 200 ft. Luedke and Smith, 1981Ekren and others, 1967, 1971Luedke and Smith, 1981;others, 1967 Ekren andothers, 1971;Noble and Christiansen, 1968;others, 1968 Cornwall, 1972;others, 1966, 1971;others, 1966 Byers andGummings, 1967;others, 1966, 1976;Carr and Quinlivan, Christiansen and Lipman, 1965;Hinrichs and others, 1967;Kistler, 1968;Luedke andSmith, 1981 Byers andBarnes, 1967;Spengler and others, 1979 Cornwall, 1972;Cornwall and Kleinhampl, 1961, 1964Crowe and Carr, 1980Crowe and others, 1983;Ekren and Sargent, 1965;McKay and Williams, 1964;Sargent and others, 1970;Sargent and Stewart, 1971 PERSHING COUNTY (P) Thompson (1956) and Thompson andWhite (1964), but Bonham (1969) Bonham, 1969Bonham, 1969…”