Rapid Miocene slip on the Snake Range–Deep Creek Range fault system, east-central Nevada

Miller, Elizabeth L.; Dumitru, Trevor A.; Brown, R. W.; Gans, Phillip B.

doi:10.1130/0016-7606(1999)111<0886:rmsots>2.3.co;2

Cited by 133 publications

(206 citation statements)

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“…Although extension immediately followed the eruption of these lavas, it is likely that the boundary conditions placed on the region by west-facing subduction were as important to the initiation of extension as the addition of heat to the middle and upper crust by rising magmas, based on the widespread initiation of extension ca. 19 -14 Ma throughout the Basin and Range Province (e.g., Miller et al, 1999;Stockli 1999;Colgan et al, 2008;Fosdick and Colgan, 2008;Gonsoir and Dilles, 2008). The chemistry of these Miocene andesites supports lesser crustal contamination than that experienced by earlier magmas, possibly indicating a thinner crust beneath the area relative to the Oligocene.…”

Section: Discussionmentioning

confidence: 99%

Cenozoic tectonic evolution of the central Wassuk Range, western Nevada, USA

Surpless

2011

International Geology Review

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Section: Discussionmentioning

confidence: 99%

Cenozoic tectonic evolution of the central Wassuk Range, western Nevada, USA

Surpless

2011

International Geology Review

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“…1; Rodgers et al, 2002;Leeman et al, 2008). This regional intra continental basin crosses N-trending Basin and Range structures and has undergone E-W extension (Miller et al, 1999). Several vast ignimbrite sheets are exposed in massifs along the north and south flanks of the Snake River basin, and are thought to derive from various rhyolitic eruptive centers concealed beneath Neogene basalt lavas within the Snake River basin .…”

Section: Geological Settingmentioning

confidence: 99%

Mid-Miocene record of large-scale Snake River–type explosive volcanism and associated subsidence on the Yellowstone hotspot track: The Cassia Formation of Idaho, USA

Knott

Branney

Reichow

et al. 2016

Geological Society of America Bulletin

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The 1.95-km-thick Cassia Formation, defined in the Cassia Hills at the southern margin of the Snake River Plain, Idaho, consists of 12 refined and newly described rhyolitic members, each with distinctive field, geochemical, mineralogical, geochronological, and paleomagnetic characteristics. It records voluminous high-temperature, Snake River-type explosive eruptions between ca. 11.3 Ma and ca. 8.1 Ma that emplaced intensely welded rheomorphic ignimbrites and associated ash-fall layers. One ignimbrite records the ca. 8.1 Ma Castleford Crossing eruption, which was of supereruption magnitude (~1900 km 3 ). It covers 14,000 km 2 and exceeds 1.35 km thickness within a subsided, proximal caldera-like depocenter. Majorand trace-element data define three successive temporal trends toward less-evolved rhyolitic compositions, separated by abrupt returns to more-evolved compositions. These cycles are thought to reflect increasing mantle-derived basaltic intraplating and hybridization of a midcrustal region, coupled with shallower fractionation in upper-crustal magma reservoirs. The onset of each new cycle is thought to record renewed intraplating at an adjacent region of crust, possibly as the North American plate migrated westward over the Yellowstone hotspot. A regional NE-trending monocline, here termed the Cassia monocline, was formed by synvolcanic deformation and subsidence of the intracontinental Snake River basin. Its structural and topographic evolution is reconstructed using thickness variations, offlap relations, and rheomorphic transport indicators in the successive dated ignimbrites. The subsidence is thought to have occurred in response to incremental loading and modification of the crust by the mantle-derived basaltic magmas. During this time, the area also underwent NW-trending faulting related to opening of the western Snake River rift and E-W Basin and Range extension. The large eruptions probably had different source locations, all within the subsiding basin. The proximal Miocene topography was thus in marked contrast to the more elevated present-day Yellowstone plateau.

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“…The modern topography of much of the northern Basin and Range formed during a period of large magnitude extension which peaked at about 20-15 Ma [e.g., Miller et al, 1999;Stockli, 1999;Surpless et al, 2002], and coincided with the eruption of the Columbia River flood basalts in Washington and Oregon, and the onset of bimodal basalt-rhyolite volcanism across much of the northern Basin and Range [e.g., McKee, 1971;Stewart and Carlson, 1978;Seedorff, 1991;Christiansen et al, 1992] associated with the Yellowstone hot spot, which is thought to have reached the base of the lithosphere at about 16 Ma beneath McDermitt, Nevada [e.g., Zoback and Thompson, 1978;Pierce and Morgan, 1992;Smith et al, 1993]. Some researchers have suggested that the thermal effects of this plume were responsible for widespread extension across the Basin and Range [e.g., Pierce and Morgan, 1992;Parsons et al, 1994].…”

Section: Neogene Extension In the Northern Basin And Rangementioning

confidence: 99%

Crustal structure of the northwestern Basin and Range Province and its transition to unextended volcanic plateaus

Lerch¹,

Klemperer

Glen

et al. 2007

Geochem Geophys Geosyst

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[1] The northwestern margin of the Basin and Range Province is characterized by a transition from lowmagnitude ($20%) extension in northwestern Nevada to relatively unextended volcanic plateaus in northeastern California. Seismic-velocity and potential-field modeling provides new control on the Mesozoic-to-present tectonic evolution of this poorly understood portion of the U.S. Cordillera. We document $20% crustal thinning associated with Basin and Range extension from a crustal thickness of $37 km under northeastern California to $31 km under northwestern Nevada that is consistent with the amount of extension recorded in the upper crust in northwestern Nevada, suggesting the crustal response to extension was relatively homogeneous over the entire crustal column. Our modeling also shows a welldefined, 80-km-wide zone of unusually low upper-crustal velocities ($5.9-6.1 km/s) that coincide with the surface location of sparse Cretaceous granites, locating the elusive northern extension of the Sierra Nevada batholith through northwestern Nevada for the first time in the subsurface. Combining geological and geophysical data, we reconstruct the late Cretaceous-to-present crustal evolution of this region, documenting an interplay between magmatic addition to the crust, erosional exhumation, sedimentation, and extension that has reversed the direction of crustal thinning from a west-facing continental margin to an east-facing interior basin margin over this time interval. Finally, we find no evidence in northwestern Nevada for unusually thick crust (>40 km) prior to Basin and Range extension.

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Rapid Miocene slip on the Snake Range–Deep Creek Range fault system, east-central Nevada

Cited by 133 publications

References 0 publications

Cenozoic tectonic evolution of the central Wassuk Range, western Nevada, USA

Cenozoic tectonic evolution of the central Wassuk Range, western Nevada, USA

Mid-Miocene record of large-scale Snake River–type explosive volcanism and associated subsidence on the Yellowstone hotspot track: The Cassia Formation of Idaho, USA

Crustal structure of the northwestern Basin and Range Province and its transition to unextended volcanic plateaus

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