Steep tilting of metavolcanic rocks by multiple mechanisms, central Sierra Nevada, California

Tobisch, Othmar T.; Fiske, Richard S.; Saleeby, Jason B.; Holt, Elizabeth Warner; Sorensen, Sorena S.

doi:10.1130/0016-7606(2000)112<1043:stomrb>2.0.co;2

Cited by 34 publications

(81 citation statements)

References 40 publications

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“…[23] Tilting of stratigraphic sections immediately prior to significant contractional events was a widespread phenomenon in and adjacent to the Sierran arc during Middle to Late Jurassic time [Hanson et al, 1996;Tobisch et al, 1989Tobisch et al, , 2000Wolf and Saleeby, 1995]. However, whether these tilting events were of extensional origin, perhaps related to relatively brief episodes of transtensional plate boundary interactions [cf.…”

Section: Chronology Of Deformationmentioning

confidence: 99%

“…Carl et al, 1998] and right-lateral in Late Cretaceous time [cf. Tobisch et al, 2000], apparently influenced deformation in the east part of the arc and the immediate back arc.…”

Section: Ests-magmatic Arc Genetic Linksmentioning

confidence: 99%

“…We tend to favor a contractional origin for ESTS tilting, perhaps enhanced by wall rock downflow [cf. Tobisch et al, 2000] that may have accompanied the modest pulse of Late Jurassic plutonism in the Sierran arc [Ducea, 2001].…”

Section: Chronology Of Deformationmentioning

confidence: 99%

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Structure and evolution of the East Sierran thrust system, east central California

Dunne

Walker

2004

Tectonics

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A belt of arc‐parallel, northeast vergent contractional deformation, the East Sierran thrust system (ESTS), crops out for ∼150 km along the east side of the Sierran continental margin arc. The ESTS is nowhere wider than ∼20 km, and it accommodated an estimated minimum of ∼9.3 km of horizontal shortening. Remarkably, it experienced repeated episodes of broadly coaxial and coaxial‐planar contractional deformation beginning prior to 188 Ma and continuing past 140 Ma. We postulate that the ESTS resulted primarily from episodic underthrusting of the back arc lithosphere beneath the east edge of the Sierran arc, facilitated by a buttressing effect of the arc. As a result of this process, rocks along the east flank of the batholith, including the ESTS, were episodically shortened against the arc buttress. The ESTS experienced significant deformation during the Nevadan orogeny, indicating that contractional to transpressive deformation affiliated with this event affected the eastern wall rocks of the arc as well as its western wall rocks.

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Section: Chronology Of Deformationmentioning

confidence: 99%

“…Carl et al, 1998] and right-lateral in Late Cretaceous time [cf. Tobisch et al, 2000], apparently influenced deformation in the east part of the arc and the immediate back arc.…”

Section: Ests-magmatic Arc Genetic Linksmentioning

confidence: 99%

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Structure and evolution of the East Sierran thrust system, east central California

Dunne

Walker

2004

Tectonics

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“…Many of these plutons have been associated with various right-stepping, dextral shear zones within the eastern Sierra that formed concurrently with shallow (8-10 km) pluton emplacement (e.g., Sierran Crest shear zone, proto-Kern Canyon shear zone, and the Mojave-Snow Lake shear zone; Glazner, 1991;McNulty, 1995;Tikoff and Greene, 1997;Tikoff and de Saint Blanquat, 1997;Tobisch et al, 2000;Tikoff et al, 2005;Hirt, 2007). In particular, the northern portion of the Sierran Crest shear zone contains the Gem Lake-Bench CanyonQuartz Mountain-Cascade Lake shear zone system adjacent to the Tuolumne Igneous Complex (TIC; Fig.…”

Section: Sierran Arcmentioning

confidence: 99%

“…Many studies have documented an overall increase in plate convergence rate and plate motion parallel to the arc (obliquity) occurring 100-90 Ma (Page and Engebretson, 1984;Engebretson et al, 1985;Liu et al, 2008). Others suggest that these plate motion changes led to induced deformation in the eastern Sierran arc, resulting in increased rates of magmatism (Glazner, 1991;Tikoff and Teyssier, 1992;McNulty, 1995;Greene and Schweickert, 1995;Tikoff and Greene, 1997;Tobisch et al, 2000;Memeti et al, 2014;Paterson and Ducea, 2015), as well as accelerated phases of accretion in the prism (Wakabayashi, 2015). Studies of forearc basin stratigraphy have also recognized various sedimentary Greene and Surpless | Facies architecture and provenance of a boulder-conglomerate, Panoche Formation GEOSPHERE | Volume 13 | Number 3 responses at ca.…”

Section: Introductionmentioning

confidence: 99%

Facies architecture and provenance of a boulder-conglomerate submarine channel system, Panoche Formation, Great Valley Group: A forearc basin response to middle Cretaceous tectonism in the California convergent margin

Greene¹,

Surpless²

2017

Geosphere

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Tectonic reorganization induced by a rapid increase in plate motion obliquity and rate beginning at ca. 100 Ma affected California's Andean-style convergent margin, with concomitant changes in the accretionary prism of the Franciscan Complex, the Great Valley forearc basin, and the Sierran continental arc. Using facies analysis and a combined provenance approach, we suggest that this ca. 100 Ma tectonic signal is preserved in a Cenomanian (Upper Cretaceous) boulder-conglomerate outcrop along the San Luis Reservoir (SLR) in the southern Great Valley, which represents the thickest and coarsest deep-water deposit ever described in the Great Valley Group (GVG). We document a 1.8-km-thick by 4-km-long depositional-dip profile of an interpreted SE-directed (axial) submarine channel system that is part of a conglomeratic package that stretches 20 km along the east-central Diablo Range. Our facies analysis of the SLR area documents five facies associations within four aggradational channel complex sets, followed by regional abandonment.Sandstone petrography and mudrock geochemical data suggest a dissected continental Sierra Nevadan arc source. Conglomerate clast counts show abundant ophiolitic-type clasts that may be derived from the Coast Range Ophiolite and/or the Western Sierra Nevada Metamorphic Belt. Detrital-zircon geochronology data also indicate western and central Sierra Nevadan sources; however, we interpret an anomalous (relative to other Cenomanian localities) 105-95 Ma zircon population to indicate the initial erosional products from the volcanic carapace associated with the Late Cretaceous magmatic flare-up within the eastern Sierran arc. This flare-up has been linked to an increase in arc-parallel plate motion that induced deformation along shear zones in the eastern Sierra Nevada, allowing for widespread plutonism. Our provenance interpretation makes the SLR area the earliest Upper Cretaceous GVG locality to receive significant detritus from the flare-up, effectively linking tectonic plate motion changes and coarse-grained, deep-water forearc sedimentation.

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A mass balance and isostasy model: Exploring the interplay between magmatism, deformation and surface erosion in continental arcs using central Sierra Nevada as a case study

Cao¹,

Paterson

2016

Geochem Geophys Geosyst

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A one-dimensional mass balance and isostasy model is used to explore the feedbacks between magmatism, deformation and surface erosion and how they together affect crustal thickness, elevation, and exhumation in a continental arc. The model is applied to central Sierra Nevada in California by parameterizing magma volume and deformational strain. The simulations capture the first-order MesozoicCenozoic histories of crustal thickness, elevation and erosion including moderate Triassic crustal thickening and Jurassic crustal thinning followed by a strong Cretaceous crustal thickening, the latter resulting in a 60-70 km-thick crust plus a 20 km-thick arc eclogitic root, and a $5 km elevation in the Late Cretaceous. The contribution of contractional deformation to the crustal thickening is twice that of the magmatism. The contribution to elevation from magmatism is dampened by the formation of an eclogitic root. Erosion rate increases with the magnitude of crustal thickening (by magmatism and deformation) but its peak rate always lags behind the peak rate of thickening. We propose that thickened crust initially promotes magma generation by downward transport of materials to the magma source region, which may eventually jam the mantle wedge affecting the retro-arc underthrusting process and reducing arc magmatism.

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Steep tilting of metavolcanic rocks by multiple mechanisms, central Sierra Nevada, California

Cited by 34 publications

References 40 publications

Structure and evolution of the East Sierran thrust system, east central California

Structure and evolution of the East Sierran thrust system, east central California

Facies architecture and provenance of a boulder-conglomerate submarine channel system, Panoche Formation, Great Valley Group: A forearc basin response to middle Cretaceous tectonism in the California convergent margin

A mass balance and isostasy model: Exploring the interplay between magmatism, deformation and surface erosion in continental arcs using central Sierra Nevada as a case study

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