Evaluation of the seismicity of the southern Great Basin and its relationship to the tectonic framework of the region

Rogers, A.M.; Harmsen, Stephen C.; Meremonte, Mark

doi:10.3133/ofr87408

Cited by 19 publications

(13 citation statements)

References 35 publications

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“…They include the Death Valley-Furnace Creek fault zone and extension along the Fish Lake Valley fault zone, the eastlwest seismic zone (Smith and Sbar 1974;Smith 1978), the Nevada-California seismic zone, and the Nevada Test Site Paleoseismic belt that now would be called the Kawich-Greenwater rift (Carr 1990). Rogers et al (1987) summarized earthquake hypocenters, selected focal mechanisms, and other inferred seismicity characteristics through 1987. Conclusions from this report are:…”

Section: A Seismic Studiesmentioning

confidence: 99%

“…Alternatively, the area could be a seismic gap with high stresses and locked faults. Rogers et al (1987) summarized several lines of evidence supporting seismic uncoupling but noted that other interpretations are possible.…”

Section: 3)mentioning

confidence: 99%

“…Gomberg noted that there is an absence of seismicity at Yucca Mountain. She discussed the same causes of low seismicity as Rogers et al (1987) but noted that seismic models predict a minimum in shear strain at Yucca Mountain. Additionally, she drew attention to relatively low levels of seismicity west of the Death Valley-Furnace Creek faults despite an abundance of young fault scarps indicative of recent tectonic activity.…”

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confidence: 98%

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Status of volcanism studies for the Yucca Mountain Site Characterization Project

Crowe¹,

Perry²,

Murrell³

et al. 1995

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; ifs unique idenfzfier assigned to fhis appendix is LA-EES-13-LV-12-95-002. To obtain rgerences bgore fhe appendix is issued, confacf Kean Finnegan at (7021-794-7273 ABSTRACTChapter 1 introduces the volcanism issue for the Yucca Mountain site and provides the reader with an overview of the organization, content, and significant conclusions of this report. The risk of future basaltic volcanism is the primary topic of concern including both events that intersect a potential repository and events that occur near or within the waste isolation system of a repository. Future volcanic events cannot be predicted with certainty but instead are estimated using formal methods of probabilistic volcanic hazard assessment. Chapter 2 describes the volcanic history of the Yucca Mountain region (YMR) and emphasizes the Pliocene and Quaternary volcanic record, the interval of primary concern for volcanic risk assessment. The distribution, eruptive history, and geochronology of Plio-Quaternary basalt centers are described by individual center emphasizing the two cycles of the Postcaldera basalt, the Older postcaldera basalt and the Younger postcaldera basalt. The Lathrop Wells volcanic center is described in detail because it is the youngest basalt center in the YMR, it has been problematic to establish the geochronology of the center; and it probably formed during multiple, timeseparate eruptive events, an unexpected difference from typical monogenetic basaltic volcanic centers. Chapter 3 describes the tectonic setting of the YMR and presents and assesses the significance of multiple alternative tectonic models. The Crater Flat volcanic zone is defined and described as one of many alternative models of the structural controls of the distribution of Plio-Quaternary basalt centers in the YMR. Geophysical data are described for the YMR and are used as an aid to understand the distribution of basaltic volcanic centers. Chapter 4 discusses the petrologic and geochemical features of basaltic volcanism in the YMR, the southern Great Basin and the Basin and Range province. Geochemical and isotopic data are described that indicate basalt of the southern Great Basin was derived from ancient lithospheric mantle. The long time of activity and characteristic small volume of the Postcaldera basalt of the YMR result in one of the lowest eruptive rates in a volcanic field in the southwest United States. Quaternary lavas of the YMR lack plagioclase phenocrysts and fractionated at high pressure in the lower crust or upper mantle before ascent and eruption. The compositional variation of the Lathrop Wells center provides strong evidence of formation from separate and unrelated magma batches. Chapter 5 summarizes current concepts of the segregation, ascent, and eruption of basalt magma. Magma ascending as dikes probably followed northwest-trending structure at depth and diverted at shallow depths following the direction of maximum compressive stress. Chapter 6 summarizes the history of volcanism studies (1979 through early 1994), including work f...

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Section: A Seismic Studiesmentioning

confidence: 99%

Section: 3)mentioning

confidence: 99%

mentioning

confidence: 98%

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Status of volcanism studies for the Yucca Mountain Site Characterization Project

Crowe¹,

Perry²,

Murrell³

et al. 1995

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show abstract

“…The upgrade was undertaken to provide both higher quality earthquake locations with the routine recording of horizontal S-waves at all stations and the capability of adapting modem waveform modeling techniques to study seismic source parameters to further refine models of the crustal structure in and around Yucca Mountain . Rogers et al (1987) summarized earthquake hypocenters and selected focal mechanisms and other inferred seismicity characteristics through 1987. Conclusions from this report are as follows.…”

Section: A Seismic Studiesmentioning

confidence: 99%

“…Alternatively, it could be ' w ' an area of low seismicity with high stresses and locked faults. Rogers et al (1987) summarized several lines of evidence supporting seismic uncoupling but noted that other interpretations are possible.…”

mentioning

confidence: 99%

Systhesis of Volcanism Studies for the Yucca Mountain Site Characterization Project

Perry¹,

Crowe²,

Valentine³

et al. 1997

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Strike-slip fault system in Amargosa Valley and Yucca Mountain, Nevada

Schweickert

Lahren

1997

Tectonophysics

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Evaluation of the seismicity of the southern Great Basin and its relationship to the tectonic framework of the region

Cited by 19 publications

References 35 publications

Status of volcanism studies for the Yucca Mountain Site Characterization Project

Status of volcanism studies for the Yucca Mountain Site Characterization Project

Systhesis of Volcanism Studies for the Yucca Mountain Site Characterization Project

Strike-slip fault system in Amargosa Valley and Yucca Mountain, Nevada

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