Transtensional deformation in the Lake Tahoe region, California and Nevada, USA

Schweickert, Richard A.; Lahren, Mary M.; Smith, Ken; Howle, James F.; Ichinose, Gene A.

doi:10.1016/j.tecto.2004.04.019

Cited by 34 publications

(49 citation statements)

References 32 publications

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“…In the western part of the Walker Lake domain, Miocene and younger deformation has been accommodated by E-W directed extension along major N-NNW-striking normal faults (e.g., Stewart and Dohrenwend, 1984;Proffett and Dilles, 1984;Surpless, 1999;Stockli et al, 2002;Schweickert et al, 2004). In the eastern zone of the Walker Lake domain, dextral faults trend ∼ N25-50°W ( Fig.…”

Section: Detailed Geology Of the Walker Lake Structural Domainmentioning

confidence: 99%

“…In the western section of the Walker Lake domain, the locus of significant extensional deformation migrated to the west from the Wassuk Range at ∼ 15 Ma to the Sierra Nevada frontal fault system at ∼ 3 Ma (Dilles and Gans, 1995;Henry and Perkins, 2001;Schweickert et al, 2004), although the timing of the onset of faulting related to Sierra Nevadan uplift might be much earlier than 3 Ma (e.g., DeOreo et al, 2005). The motion along a series of N-NNW-striking, east-dipping normal faults is primarily dip-slip (e.g., Proffett, 1977;Dilles, 1993;, resulting in a series of asymmetric half-grabens and mountain ranges across the area ( Fig.…”

Section: Western Section Of the Walker Lake Domainmentioning

confidence: 99%

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Modern strain localization in the central Walker Lane, western United States: Implications for the evolution of intraplate deformation in transtensional settings

Surpless

2008

Tectonophysics

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Section: Detailed Geology Of the Walker Lake Structural Domainmentioning

confidence: 99%

Section: Western Section Of the Walker Lake Domainmentioning

confidence: 99%

Modern strain localization in the central Walker Lane, western United States: Implications for the evolution of intraplate deformation in transtensional settings

Surpless

2008

Tectonophysics

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“…Mid-to Late Cretaceous granite and granodiorite underlie most of the Sierra Nevada and Carson Ranges (John et al, 1994). Oligocene to Lower Miocene silicic ash flows erupted from volcanic centers east and northeast of Reno, Nevada, and filled paleovalleys carved in Sierran bedrock (Bateman and Wahrhaftig, 1966;Schweickert et al, 2004;Garside et al, 2005).…”

Section: Geologic Settingmentioning

confidence: 99%

“…The Tahoe City shelf is bounded to the east by the Dollar Point fault, a large east-side-down normal fault (Gardner et al, 2000;Schweickert et al, 2000b;Schweickert et al, 2004;Dingler et al, 2009;Fig. 2).…”

Section: Sediments Of Proto-tahoementioning

confidence: 99%

Pleistocene volcanism and shifting shorelines at Lake Tahoe, California

et al. 2018

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In the northwestern Lake Tahoe Basin, Pleistocene basaltic and trachy andesitic lavas form a small volcanic field comprising ~1 km 3 of lava that erupted from seven vents. Most of these lavas erupted subaerially and produced lava flows. However, where they flowed into an early Lake Tahoe ( ProtoTahoe), they produced deltas consisting of hydrovolcanic breccias as well as pillow lavas draped downslope, pillow breccias, hyaloclastites, and mixtures of lava and wet sediments.

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“…Part of the Sierra Nevada to Basin and Range transition, the Truckee Basin lies south of the Verdi-Boca Basin (Henry and Perkins, 2001) and to the north of the Lake Tahoe Basin. The present-day topography, including the Tahoe and Truckee Basins, is commonly accepted to have developed as the result of a major extensional event and uplift of the Sierra Nevada range that began around three million years before present (3 Ma) (Birkeland, 1961;Latham, 1985;Schweickert et al, 2004) and continues to this day (Hammond et al, 2011a,b).…”

Section: Geologic Backgroundmentioning

confidence: 99%

Geophysical investigations of geology and structure at the Martis Creek Dam, Truckee, California

Bedrosian¹,

Burton²,

Powers³

et al. 2012

Journal of Applied Geophysics

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a b s t r a c t a r t i c l e i n f oA recent evaluation of Martis Creek Dam highlighted the potential for dam failure due to either seepage or an earthquake on nearby faults. In 1972, the U.S. Army Corps of Engineers constructed this earthen dam, located within the Truckee Basin to the north of Lake Tahoe, CA for water storage and flood control. Past attempts to raise the level of the Martis Creek Reservoir to its design level have been aborted due to seepage at locations downstream, along the west dam abutment, and at the base of the spillway. In response to these concerns, the U.S. Geological Survey has undertaken a comprehensive suite of geophysical investigations aimed at understanding the interplay between geologic structure, seepage patterns, and reservoir and groundwater levels. This paper concerns the geologic structure surrounding Martis Creek Dam and emphasizes the importance of a regional-scale understanding to the interpretation of engineering-scale geophysical data. Our studies reveal a thick package of sedimentary deposits interbedded with Plio-Pleistocene volcanic flows; both the deposits and the flows are covered by glacial outwash. Magnetic field data, seismic tomography models, and seismic reflections are used to determine the distribution and chronology of the volcanic flows. Previous estimates of depth to basement (or the thickness of the interbedded deposits) was 100 m. Magnetotelluric soundings suggest that electrically resistive bedrock may be up to 2500 m deep. Both the Polaris Fault, identified outside of the study area using airborne LiDAR, and the previously unnamed Martis Creek Fault, have been mapped through the dam area using ground and airborne geophysics. Finally, as determined by direct-current resistivity imaging, time-domain electromagnetic sounding, and seismic refraction, the paleotopography of the interface between the sedimentary deposits and the overlying glacial outwash plays a principal role both in controlling groundwater flow and in the distribution of the observed seepage.Published by Elsevier B.V.

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Transtensional deformation in the Lake Tahoe region, California and Nevada, USA

Cited by 34 publications

References 32 publications

Modern strain localization in the central Walker Lane, western United States: Implications for the evolution of intraplate deformation in transtensional settings

Modern strain localization in the central Walker Lane, western United States: Implications for the evolution of intraplate deformation in transtensional settings

Pleistocene volcanism and shifting shorelines at Lake Tahoe, California

Geophysical investigations of geology and structure at the Martis Creek Dam, Truckee, California

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