Geology of Bullfrog quadrangle and ore deposits related to Bullfrog Hills Caldera, Nye County, Nevada, and Inyo County, California

Cornwall, Henry Rowland; Kleinhampl, F.J.

doi:10.3133/pp454j

Cited by 26 publications

(25 citation statements)

References 14 publications

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“…The redefined upper boundary of the Titus Canyon Formation is a disconformity occurring below strata of the green conglomerate facies, which we herein reassign to the Panuga Formation on the basis of chronologic, lithologic, and tectono-stratigraphic similarities. Although pre-Tertiary rocks below the Titus Canyon Formation locally are structurally complex (Reynolds, 1969;Cornwall and Kleinhampl, 1964), Titus Canyon and overlying Panuga strata are essentially concordant with underlying rocks in areas away from major pre-Cenozoic structures (Wright and Troxel, 1993). Thus, we assign strata of the Titus Canyon and Panuga Formations to the early extensional Grapevine Sequence.…”

Section: Titus Canyon Formationmentioning

confidence: 98%

Tectono-sequence stratigraphy of Tertiary rocks in the Cottonwood Mountains and northern Death Valley area, California and Nevada

Snow¹,

Lux²

1999

Cenozoic Basins of the Death Valley Region

153

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When considered within a regional, tectono-sequence stratigraphic framework, Cenozoic strata in the Cottonwood Mountains provide a relatively complete record of major extensional tectonism within the Death Valley region, California and Nevada. Using detailed mapping, measured stratigraphic sections, and 40 Ar/ 39 Ar geochronology on intercalated volcanic units, we erect a formal stratigraphy for Oligocene through recent strata in the Cottonwoods that serves as a reference section for much of the northern Death Valley area. We assign Tertiary strata throughout the Cottonwood, Panamint, Grapevine, and Funeral Mountains to time-transgressive tectonosequences of early, syn-, and late extensional age relative to development of the extended terrane. Strata of the early extensional Grapevine Sequence, comprising the Titus Canyon, Ubehebe, and Panuga Formations, were deposited prior to the onset of large-magnitude extension at about 15 Ma in the Death Valley region. This early phase of relative tectonic quiescence was interrupted twice, at around 36 and 25 Ma, by local normal faulting that accommodated limited regional extension. Strata of the synextensional Amargosa Sequence, including the Leadfield, Bat Mountain, Artist Drive, and Navadu Formations, were deposited within the Bullfrog, Furnace Creek, and Nova sedimentary basins that developed as range-scale crustal fragments progressively separated during regional large-magnitude extension. Strata of the late extensional sequence, including the Furnace Creek, Funeral, and Nova Formations, overlapped synextensional strata after the local cessation of significant extensional tectonism. The time-transgressive record of Amargosa deposition indicates an eastto-west migration in the locus of active extension, in accord with previous observations documenting a progressive westward shift in the cessation of major extension. Unconformities within the Amargosa Sequence document stratal tilting within the Cottonwood Mountains rollover system, a large fault-bend fold above a listric detachment. Such tilting, which is coupled to active extension, predates a surprisingly large fraction of deposition in the Nova basin, a graben that resulted from separation of the Cottonwood and Panamint Mountains during formation of the rollover. Thus, a significant time lag is apparent between major extensional events and infilling of concomitant sedimentary basins by locally eroded material. Recognition of such Snow, J. K.

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Section: Titus Canyon Formationmentioning

confidence: 98%

Tectono-sequence stratigraphy of Tertiary rocks in the Cottonwood Mountains and northern Death Valley area, California and Nevada

Snow¹,

Lux²

1999

Cenozoic Basins of the Death Valley Region

153

View full text Add to dashboard Cite

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“…The west-facing Beatty escarpment, along the west side of Bare Mountain, previously was interpreted as a Quaternary fault scarp (for example, Cornwall and Kleinhampl, 1964). More recent studies, however, have suggested that this escarpment may not be a tectonic feature, but rather an erosional escarpment cut by lateral migration of the Amargosa River into the lower parts of alluvial fans shed from the west side of Bare Mountain (Swadley and others 1988).…”

Section: Geologic Historymentioning

confidence: 99%

Geologic map of Bare Mountain, Nye County, Nevada

Monsen¹,

Carr²,

Rheis³

et al. 1990

Open-File Report

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“…1; Brocher et al, 1993) occurred between the onset of extension and the present. Lake beds related to calderas such as in the Bullfrog Hills (Cornwall and Kleinhampl, 1964; 30 km southwest of Yucca Mountain) would be potentially younger formed after the 17 Ma when activity in the southern Nevada volcanic field commenced (Table 1). As shown below, these lake beds are areally restricted and vary from poor to rich oil and gas source rocks.…”

Section: Neogenementioning

confidence: 99%

Thermal and petroleum generation history of the Mississippian Eleana Formation and Tertiary source rocks, Yucca Mountain area, southern Nye County, Nevada

Barker¹

1994

Open-File Report

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A geochemical and geologic assessment of petroleum potential in the Yucca Mountain area indicates little remaining potential for significant oil and gas generation in the Mississippian Eleana Formation or related Paleozoic rocks and a good, but areally restricted potential, in Tertiary rocks in area 8 of the Nevada Test Site. Mesozoic age source rocks are not present in the Yucca Mountain area. The Tertiary source rocks in Area 8 are typically carbon-rich, and where hydrogen-rich, are good oil-prone source rocks. These oil source rocks are immature to marginally mature with respect to oil and gas generation. The hydrothermally altered Tertiary source rocks at north Bare Mountain retain little generation capacity. A thermal history reconstructed for the Yucca Mountain area based on the Eleana Formation indicates petroleum was generated in the Late Paleozoic and possibly the Early Mesozoic and the oil has since been lost or was metamorphosed to pyrobitumen during later heating probably related to igneous activity. The Tertiary rocks are still capable of generating oil and gas, but little potential exists for a major hydrocarbon discovery due to the restricted occurrence of the good source rocks and their marginal thermal maturity away from intrusions.

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Geology of Bullfrog quadrangle and ore deposits related to Bullfrog Hills Caldera, Nye County, Nevada, and Inyo County, California

Abstract: _ ___________________ Introduction. Precambrian rocks._ Paleozoic rocks_______ Daylight Formation. Age and correlation. Corkscrew Quartzite._ Age and correlation. Carrara Formation__ Nopah Formation_ Pogonip Group,_________… Show more

Cited by 26 publications

References 14 publications

Tectono-sequence stratigraphy of Tertiary rocks in the Cottonwood Mountains and northern Death Valley area, California and Nevada

Tectono-sequence stratigraphy of Tertiary rocks in the Cottonwood Mountains and northern Death Valley area, California and Nevada

Geologic map of Bare Mountain, Nye County, Nevada

Thermal and petroleum generation history of the Mississippian Eleana Formation and Tertiary source rocks, Yucca Mountain area, southern Nye County, Nevada

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