Triassic and Jurassic stratigraphy and paleogeography of west-central Nevada and eastern California

Stewart, John H.; Silberling, Norman J.; Harwood, David S.

doi:10.3133/ofr97495

Cited by 11 publications

(22 citation statements)

References 35 publications

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“…Silurian and Devonian strata consist largely of carbonate and sandy carbonate rocks in the western United States Johnson et al, 1991;Sheehan and Boucot, 1991;Poole, 1992a, 1992b) and in Sonora (Poole et al, , 1998(Poole et al, , 2000aStewart et al, 1997;Stewart and Poole, 2002). These rocks show the same apparent left-lateral offset as other Neoproterozoic to Lower Jurassic strata (Fig.…”

Section: Silurian and Devonian Miogeoclinal Stratamentioning

confidence: 64%

“…Interstratifi ed volcanic rocks are locally present in Upper Triassic strata. The exact southward continuation of these rocks is uncertain, but they appear to connect with strata in the northern Sierra Nevada (Schweickert, 1978;Stewart, 1997) and then southward to form the Kings sequence in the central and southern Sierra Nevada. The Kings sequence (Saleeby et al, 1978;Saleeby and Busby-Spera, 1992;Saleeby and Busby, 1993) is a complex assemblage of quartzite, marble, calc-silicate rocks, schist, chert-argillite, and slate, silicic metavolcanic rocks, and basalt-andesite metavolcanic rocks.…”

Section: Marine Upper Triassic and Lower Jurassic Rocksmentioning

confidence: 95%

“…The Upper Permian Monos Formation in the El Antimonio area of northwest Sonora (Cooper et al, 1953;Stewart et al, 1990Stewart et al, , 1997 may lie near or outboard of the Cordilleran margin (Fig. 10).…”

Section: Pennsylvanian and Permian Miogeoclinal Stratamentioning

confidence: 96%

“…Distribution of Upper Triassic and Lower Jurassic marine and nonmarine continental margin strata. Based on Stewart (1980Stewart ( , 1997, Nokleberg (1983), Saleeby et al (1978), and Stewart et al (1997). Distribution of the Early Jurassic bivalve Weyla after Saleeby and Busby (1993), Estep (1997, 1999), Damborenea and González-León (1997), and N.J. Silberling (2002, personal commun.…”

Section: Marine Upper Triassic and Lower Jurassic Rocksmentioning

confidence: 97%

“…Outboard terranes such as the Taylorsville area in the northern Sierra Nevada, the Klamath Mountains in northern California, and the Blue Mountains in southeastern Oregon are excluded. In central and western Nevada, marine Upper Triassic and Lower Jurassic rocks (Silberling and Roberts, 1962;Nichols and Silberling, 1977;Stewart, 1980Stewart, , 1997 consist of limestone, shale, sandstone, and conglomerate, largely of Late Triassic age, overlain by a thick succession of generally fi ne-grained clastic strata of Early Jurassic age. Interstratifi ed volcanic rocks are locally present in Upper Triassic strata.…”

Section: Marine Upper Triassic and Lower Jurassic Rocksmentioning

confidence: 99%

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Evidence for Mojave-Sonora megashear—Systematic left-lateral offset of Neoproterozoic to Lower Jurassic strata and facies, western United States and northwestern Mexico

Stewart¹

2005

The Mojave-Sonora Megashear Hypothesis: Development, Assessment, and Alternatives

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Major successions as well as individual units of Neoproterozoic to Lower Jurassic strata and facies appear to be systematically offset left laterally from eastern California and western Nevada in the western United States to Sonora, Mexico. This pattern is most evident in units such as the "Johnnie oolite," a 1-to 2-m-thick oolite of the Neoproterozoic Rainstorm Member of the Johnnie Formation in the western United States and of the Clemente Formation in Sonora. The pattern is also evident in the Lower Cambrian Zabriskie Quartzite of the western United States and the correlative Proveedora Quartzite in Sonora. Matching of isopach lines of the Zabriskie Quartziteand Proveedora Quartzite suggests ~700-800 km of left-lateral offset. The offset pattern is also apparent in the distribution of distinctive lithologic types, unconformities, and fossil assemblages in other rocks ranging in age from Neoproterozoic to Early Jurassic. In the western United States, the distribution of facies in Neoproterozoic and Paleozoic strata indicates that the Cordilleran miogeocline trends north-south. A north-south trend is also suggested in Sonora, and if so is compatible with offset of the miogeocline but not with the ideas that the miogeocline wrapped around the continental margin and trends east-west in Sonora. An imperfect stratigraphic match of supposed offset segments along the megashear is apparent. Some units, such as the "Johnnie oolite" and Zabriskie-Proveedora, show almost perfect correspondence, but other units are signifi cantly different. The differences seem to indicate that the indigenous succession of the western United States and offset segments in Mexico were not precisely side by side before offset but were separated by an area-now buried, eroded, or destroyed-that contained strata of intermediate facies.

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Section: Silurian and Devonian Miogeoclinal Stratamentioning

confidence: 64%

Section: Marine Upper Triassic and Lower Jurassic Rocksmentioning

confidence: 95%

Section: Pennsylvanian and Permian Miogeoclinal Stratamentioning

confidence: 96%

Section: Marine Upper Triassic and Lower Jurassic Rocksmentioning

confidence: 97%

Section: Marine Upper Triassic and Lower Jurassic Rocksmentioning

confidence: 99%

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Evidence for Mojave-Sonora megashear—Systematic left-lateral offset of Neoproterozoic to Lower Jurassic strata and facies, western United States and northwestern Mexico

Stewart¹

2005

The Mojave-Sonora Megashear Hypothesis: Development, Assessment, and Alternatives

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Bottom‐Up and Top‐Down Control on Hydrothermal Resources in the Great Basin: An Example From Gabbs Valley, Nevada

Peacock

Siler

2021

Geophysical Research Letters

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Modern and ancient hydrothermal systems are associated with a variety of recoverable resources. Modern systems can be harnessed to produce electrical or heat energy (e.g., Hamm et al., 2019), whereas ancient hydrothermal systems could have deposited mineral resources in recoverable abundances (e.g., John, 2001;Tosdal et al., 2009). Whether ancient or modern, all hydrothermal systems require (a) an interconnected network of porosity through which fluids can circulate and (b) a heat source to drive circulation. The heat source of a hydrothermal system can play a significant role in controlling commercial development, including affecting the size, depth, and chemistry of the mineralizing or circulating fluids. Therefore, imaging crustal control on deep heat sources and fluid pathways toward the near surface provides critical information for locating and characterizing potential resources.The Gabbs Valley area in west-central Nevada encompasses the eastward transition from Walker Lane dextral strike-slip tectonics to Basin and Range extensional tectonics (Figure 1). Several known modern and ancient hydrothermal systems, including multiple commercial mineral deposits, are located in the Gabbs Valley area. Three known modern hydrothermal systems exist in the Gabbs Valley area: (a) the Don A. Campbell geothermal system, which supports a 39 MWe power station that produces electricity from ∼125°C hydrothermal fluids (Orensein & Delwiche, 2014), (b) the southeastern Gabbs Valley (SGV) geothermal system with temperatures of 125°C at 150 m depth (Craig, 2018;Craig et al., 2021), and (c) Rawhide hot springs which has a surface temperature of 60°C and geothermometry as high as 130-140°C (Kratt et al., 2008). Both Don A. Campell and SGV are blind,

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New data on the lithostratigraphy, detrital zircon and Nd isotope provenance, and paleogeographic setting of the El Antimonio Group, Sonora, Mexico

González–León¹,

Stanley²,

Gehrels³

et al. 2005

The Mojave-Sonora Megashear Hypothesis: Development, Assessment, and Alternatives

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The El Antimonio Group is herein proposed as a new lithostratigraphic unit that encompasses the Antimonio, Río Asunción, and Sierra de Santa Rosa Formations in a revised nomenclature from Lucas and Estep (1999b). The type section for the Antimonio, Río Asunción, and the lower part of the Sierra de Santa Rosa Formations is located in the Sierra del Álamo, whereas the representative upper part of the Sierra de Santa Rosa Formation is located in the mountains of same name in northwestern Sonora. The ~4.5-km-thick sedimentary succession of this group is abundantly fossiliferous, and its biostratigraphic age is constrained between the Late Permian and Early Jurassic. The 3.4-km-thick section that crops out in the Sierra del Álamo is divided into 14 unconformity-bounded sequences that are tens to hundreds of meters thick and grade from the base upward from a fl uvial to shallow marine conglomerate to open marine shale. The El Antimonio succession is correlated with several other Triassic and Jurassic sections that are known in Sonora, all of which are located south of the proposed trace of the Mojave-Sonora megashear. The closest Triassic and Lower Jurassic sections that are located north of the Mojave-Sonora megashear that we correlate with the El Antimonio are known in southern Nevada and southeastern California and include the Moenkopi, Virgin Limestone, Union Wash, Silverlake, and Fairview Valley Formations and the Kings sequence. On the basis of these proposed correlations, we suggest that the El Antimonio Group was deposited in an evolving

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Triassic and Jurassic stratigraphy and paleogeography of west-central Nevada and eastern California

Cited by 11 publications

References 35 publications

Evidence for Mojave-Sonora megashear—Systematic left-lateral offset of Neoproterozoic to Lower Jurassic strata and facies, western United States and northwestern Mexico

Evidence for Mojave-Sonora megashear—Systematic left-lateral offset of Neoproterozoic to Lower Jurassic strata and facies, western United States and northwestern Mexico

Bottom‐Up and Top‐Down Control on Hydrothermal Resources in the Great Basin: An Example From Gabbs Valley, Nevada

New data on the lithostratigraphy, detrital zircon and Nd isotope provenance, and paleogeographic setting of the El Antimonio Group, Sonora, Mexico

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