Regional structural setting of Yucca Mountain, southwestern Nevada, and late Cenozoic rates of tectonic activity in part of the southwestern Great Basin, Nevada and California

Carr, W.J.

doi:10.3133/ofr84854

Cited by 109 publications

(162 citation statements)

References 40 publications

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“…4.3) indicate a dominant west to northwest electrical strike that indicates conductive anisotropy aligned in that direction. This strike roughly agrees with the trend of the Walker Lane belt (Stewart, 1980, fig.3, p.80;Carr, 1984), a belt of inferred crustal mobility of probable Mesozoic age and the location of more recent Miocene volcanism. The Walker Lane belt roughly follows a zone whose boundaries are marked by the Las Vegas Shear Zone and the Furnace Creek and Death Valley Fault Zone ( fig.…”

Section: Oqsupporting

confidence: 70%

“…Furgerson (1982) noted that two of the anomalous soundings border the edges of the Timber Mountain Caldera, and features of magmatic origin as well as faults may thus contribute to the anomalies. The northeast-striking fault zones within and transverse to the Walker Lane Belt are presently more seismically active (Carr, 1984) than faults of other orientation, but, as also suggested by Carr (1984), this activity may be largely the result of the present stress field rather than more pronounced northeast-striking crustal weaknesses. The inference of a major conductive anisotropy roughly parallel to the Walker Lane belt suggests the potential of westerly to northwesterly crustal weakness which may be subject to seismic reactivation given a suitable reorientation of stress conditions.…”

Section: Oqmentioning

confidence: 89%

“…4.3) suggest additional conductive zones that have rotated the electrical strike more northeastwardly. Based on the major strike indication at other stations, it is likely that the anomalous strikes reflect a superimposed influence of structures along the Walker Lane belt and structures that trend northeast across the Walker Lane Belt such as north-to northeast-striking tectonic zones described by Carr (1984). Furgerson (1982) noted that two of the anomalous soundings border the edges of the Timber Mountain Caldera, and features of magmatic origin as well as faults may thus contribute to the anomalies.…”

Section: Oqmentioning

confidence: 99%

“…1 Ma in later studies (Crowe and others, 1995), and at southern Yucca Mountain (southeastern Crater Flat) 10,000 to 150,000 years ago (Crowe and others, 1992;Crowe and others, 1995). These occurrences are part of the Death Valley-Pancake Range volcanic zone (Carr, 1984(Carr, , 1990), a diffise region of late Pliocene and Quaternary basaltic eruptive rocks ( fig. 1.5) The distribution of late Pliocene and Quaternary basaltic cones within 10 km of the Potential Site is shown on the detailed geologic map ( fig.…”

Section: Regional Geologic Problemsmentioning

confidence: 99%

“…(Thompson and Burke, 1974). The traverses also span the Walker Lane structural belt (Carr, 1984), which is a zone of deformation roughly bounded by the Las Vegas Shear Zone and the Furnace Creek-Death Valley Fault Zone. In the western Amargosa Desert, the MT survey crosses an area underlain by middle Tertiary detachment faults.…”

Section: Introductionmentioning

confidence: 99%

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Major results of geophysical investigations at Yucca Mountain and vicinity, southern Nevada

Ponce¹,

Hunter²

1995

Open-File Report

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(irnteragency Agreement DE-AIO8-92WlO8 74)This report is preliminary and has not been reviewed for conformity with U.S. The use of trade, product, industry, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. .. 11Copies of this report can be purchased from: km) which includes hydrologic, geologic, and environmental study areas. In the consideration of Yucca Mountain as a possible site for storing high-level nuclear waste, a number of geologic concerns have been suggested for study by the National Academy of Sciences which include (1) natural geologic and geochemical barriers, (2) possible hture fluctuations in the water table that might flood a mined underground repository, (3) tectonic stability, and (4) considerations of shaking such as might be caused by nearby earthquakes or possible volcanic eruptions. U. S. Geological SurveyThis volume represents the third part of an overall plan of geophysical investigation of Yucca Mountain, preceded by the Site Characterization Plan (SCP; dated 1988) and the report referred to as the "Geophysical White Paper, Phase I," entitled Status ofData, Major Remlts, and Plum for Geophysical Activities, Yucca Mountain Project (Oliver and others, 1990). The SCP necessarily contained uncertainty about applicability and accuracy of methods then untried in the Yucca Mountain volcano-tectonic setting, and the White Paper, Phase I, focused on summarization of survey coverage, data quality, and applicability of results. For the most part, it did not present data or interpretation. The important distinction of the current volume ("Geophysical White Paper, Phase 11") lies in presentation of data, results, and interpretations of selected geophysical methods used in characterization activities at Yucca Mountain, largely through 1990. Constraints of funding, scheduling, and applicability or availability of methods resulted in unavoidable variability of time fiame of individual investigations. Separate chapters combined here were completed at various times over several years.Yucca Mountain consists of a series of north-trending, eastward-tilted structural blocks bounded by steeply westward-dipping Cenozoic faults. These blocks consist of temgenous volcanic and Some of the most important geologic questions that need to be answered are (1) the depth to, and nature of, the contact between the Cenozoic and Paleozoic rocks, (2) the origin and possible activity of the Quaternary faults, (3) the origin and stability of a rise of about 300 m in the potentiometric surface to the north of an approximate boundary of a potential repository, and (4) the possibility of fbture nearby volcanic activity. As the surface of Yucca Mountain is largely covered with Miocene volcanic flows assigned to the Tiva Canyon Tuff of the Paintbrush Group, geophysical methods and drilling are required to determine the subsurface structure and to answer these questions.Gravity investigations began about 1979 at Yucca Mo...

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Section: Oqsupporting

confidence: 70%

Section: Oqmentioning

confidence: 89%

Section: Oqmentioning

confidence: 99%

Section: Regional Geologic Problemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Major results of geophysical investigations at Yucca Mountain and vicinity, southern Nevada

Ponce¹,

Hunter²

1995

Open-File Report

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Using multivariate statistical analysis of groundwater major cation and trace element concentrations to evaluate groundwater flow in a regional aquifer

et al. 1999

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Abstract:Groundwater samples were collected from 11 springs in Ash Meadows National Wildlife Refuge in southern Nevada and seven springs from Death Valley National Park in eastern California. Concentrations of the major cations (Ca, Mg, Na and K) and 45 trace elements were determined in these groundwater samples. The resultant data were subjected to evaluation via the multivariate statistical technique principal components analysis (PCA), to investigate the chemical relationships between the Ash Meadows and Death Valley spring waters, to evaluate whether the results of the PCA support those of previous hydrogeological and isotopic studies and to determine if PCA can be used to help delineate potential groundwater¯ow patterns based on the chemical compositions of groundwaters. The results of the PCA indicated that groundwaters from the regional Paleozoic carbonate aquifers (all of the Ash Meadows springs and four springs from the Furnace Creek region of Death Valley) exhibited strong statistical associations, whereas other Death Valley groundwaters were chemically dierent. The results of the PCA support earlier studies, where potentiometric head levels, d18 O and dD, geological relationships and rare earth element data were used to evaluate groundwater¯ow, which suggest groundwater¯ows from Ash Meadows to the Furnace Creek springs in Death Valley. The PCA suggests that Furnace Creek groundwaters are moderately concentrated Ash Meadows groundwater, re¯ecting longer aquifer residence times for the Furnace Creek groundwaters. Moreover, PCA indicates that groundwater maȳ ow from springs in the region surrounding Scotty's Castle in Death Valley National Park, to a spring discharging on the valley¯oor. The study indicates that PCA may provide rapid and relatively cost-eective methods to assess possible groundwater¯ow regimes in systems that have not been previously investigated.

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Phylogenetic Relationships within the Aquatic Snail Genus Tryonia: Implications for Biogeography of the North American Southwest

Hershler

Liu

Mulvey³

1999

Molecular Phylogenetics and Evolution

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Regional structural setting of Yucca Mountain, southwestern Nevada, and late Cenozoic rates of tectonic activity in part of the southwestern Great Basin, Nevada and California

Cited by 109 publications

References 40 publications

Major results of geophysical investigations at Yucca Mountain and vicinity, southern Nevada

Major results of geophysical investigations at Yucca Mountain and vicinity, southern Nevada

Using multivariate statistical analysis of groundwater major cation and trace element concentrations to evaluate groundwater flow in a regional aquifer

Phylogenetic Relationships within the Aquatic Snail Genus Tryonia: Implications for Biogeography of the North American Southwest

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