Geology of the Inyo Mountains Volcanic Complex: Implications for Jurassic paleogeography of the Sierran magmatic arc in eastern California

Dunne, George C.; Garvey, Timothy P.; Oborne, Mark; Schneidereit, Daniel; Fritsche, A. Eugene; Walker, J. Douglas

doi:10.1130/0016-7606(1998)110<1376:gotimv>2.3.co;2

Cited by 52 publications

(50 citation statements)

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“…Dumitru et al (Early Cretaceous (circa 123 Ma) transition from nonaccretion behavior to strongly accretionary behavior within the Franciscan subduction complex, submitted to Tectonics, 2009) have suggested that the convergent margin was transformed from a nonaccretionary to an accretionary margin at $123 Ma. In any case, subsequent evolution of the continental margin involved the construction of three subparallel lithotectonic belts: (1) a massive Sierran batholith and its comagmatic but in-part earlier volcanic carapace [Stern et al, 1981;Bateman, 1992;Dunne et al, 1998;Irwin, 2003]; (2) a thick turbiditic section accumulating in the fore-arc basin as the Great Valley Group [Ingersoll, 1978[Ingersoll, , 1979[Ingersoll, , 1983Linn et al, 1992;DeGraaff-Surpless et al, 2002;Surpless et al, 2006;Wright and Wyld, 2007]; and (3) the rapidly deposited graywackes and intercalated dark shales of the Franciscan Complex in the offshore trench [Bailey et al, 1964[Bailey et al, , 1970Hamilton, 1969 et al, 2009]. The Sierran and Great Valley belts formed along the western margin of the North American plate, whereas the Franciscan was laid down on the approaching Farallon oceanic lithosphere.…”

Section: Plate Tectonic Implicationsmentioning

confidence: 99%

“…The oceanic terrane collage was capped by terrigenous sediments and volcanics derived from an incipient arc; the latter must have started well before $160 Ma, more likely $170 Ma [Wright and Fahan, 1988;Dunne et al, 1998]. …”

Section: Plate Tectonic Implicationsmentioning

confidence: 99%

“…[19] A Middle Jurassic episode of calcalkaline volcanismplutonism in the western Klamath Mountains and the Sierra Nevada and White-Inyo ranges, as well as fragmentary relics of the Red Ant blueschists in the northern Sierran Foothills [Stern et al, 1981;Wright and Fahan, 1988;Hacker and Goodge, 1990;Dunne et al, 1998;Ernst et al, 2002;Dickinson, 2008] suggest an important subduction component of transpression at $170-150 Ma; nevertheless, dominant ophiolite + chert-argillite rock units were stranded along the edge of the continent due to largely conservative plate motions during the mid-PaleozoicMiddle Jurassic assembly of northern California [Saleeby, 1981[Saleeby, , 1982[Saleeby, , 1983Silberling et al, 1987;Irwin, 2003]. The oceanic terrane collage was capped by terrigenous sediments and volcanics derived from an incipient arc; the latter must have started well before $160 Ma, more likely $170 Ma [Wright and Fahan, 1988;Dunne et al, 1998].…”

Section: Plate Tectonic Implicationsmentioning

confidence: 99%

“…If the resultant calcalkaline arc and apron of derived volcanogenic sediments initially formed as a continuous curvilinear belt, this time interval evidently attended a progressive $200 km outboard migration of the Klamath terrane amalgam relative to the Sierra Nevada . Initiation of volcanism-plutonism and the clastic detritus shed oceanward from the growing arc include Middle and Late Jurassic granitoids [Stern et al, 1981;Bateman, 1992;Dunne et al, 1998;Dickinson, 2008] and their outboard erosional products such as the western Klamath Galice Formation [Harper et al, 1994;Miller and Saleeby, 1995;Gray, 2006] and the western Sierran Foothills Mariposa Formation [Sharp, 1988;Edelman and Sharp, 1989], both of OxfordianKimmeridgian age. Dating the onset of construction of this Upper Jurassic sequence in terms of Mariposa sedimentation, based on macrofossils and microfossils reported by Imlay [1961], Clark [1964], and Graymer and Jones [1994], may well define the change from earlier, chiefly strike-slip plate motion to later transpression involving a major component of lithospheric convergence along the Californian sector of the North American margin.…”

Section: Introductionmentioning

confidence: 99%

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Guadalupe pluton–Mariposa Formation age relationships in the southern Sierran Foothills: Onset of Mesozoic subduction in northern California?

Ernst

Saleeby

Snow³

2009

J. Geophys. Res.

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[1] We report a new 153 ± 2 Ma SIMS U-Pb date for zircons from the hypabyssal Guadalupe pluton which crosscuts and contact metamorphoses upper crustal Mariposa slates in the southern Sierra. A $950 m thick section of dark metashales lies below sandstones from which clastic zircons were analyzed at 152 ± 2 Ma. Assuming a compacted depositional rate of $120 m/Myr, accumulation of Mariposa volcanogenic sediments, which overlie previously stranded Middle Jurassic and older ophiolite + chertargillite belts in the Sierran Foothills, began no later than $160 Ma. Correlative Oxfordian-Kimmeridgian strata of the Galice Formation occupy a similar position in the Klamath Mountains. We speculate that the Late Jurassic was a time of transition from (1) a mid-Paleozoic-Middle Jurassic interval of mainly but not exclusively strike-slip and episodic docking of oceanic terranes; (2) to transpressive plate underflow, producing calcalkaline igneous arc rocks ± outboard blueschists at $170-150 Ma, whose erosion promoted accumulation of the Mariposa-Galice overlap strata; (3) continued transpressive underflow attending $200 km left-lateral displacement of the Klamath salient relative to the Sierran arc at $150-140 Ma and development of the apparent polar wander path cusps for North and South America; and (4) then nearly orthogonal mid and Late Cretaceous convergence commencing at $125-120 Ma, during reversal in tangential motion of the Pacific plate. After $120 Ma, nearly head-on subduction involving minor dextral transpression gave rise to voluminous continent-building juvenile and recycled magmas of the Sierran arc, providing the erosional debris to the Great Valley fore arc and Franciscan trench.

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Section: Plate Tectonic Implicationsmentioning

confidence: 99%

Section: Plate Tectonic Implicationsmentioning

confidence: 99%

Section: Plate Tectonic Implicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Guadalupe pluton–Mariposa Formation age relationships in the southern Sierran Foothills: Onset of Mesozoic subduction in northern California?

Ernst

Saleeby

Snow³

2009

J. Geophys. Res.

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“…Other map locations are as follows: c, Cronese Hills; g, Granite Mountains; m, Mono Lake; o, Owens Lake; s, Saddlebag Lake; w, White Mountains. Dunne et al [1998]. Informal pluton names are as follows: F, French Spring; B, Black Warrior; L, Long John.…”

Section: Contractional Faults Shear Zonesmentioning

confidence: 99%

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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Detrital zircon geochronology of Cordilleran retroarc foreland basin strata, western North America

2013

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[1] We present a compilation of 8717 U-Pb analyses from 95 detrital zircon samples of Jurassic-Eocene North American Cordillera foreland basin strata. Of these samples, 30 are new and previously unpublished. Variation in detrital zircon age spectra between samples records erosion or recycling of basement and cover rocks within the Cordilleran orogenic wedge. Each sample can be classified into one of six major provenance groups, whose age spectra suggest derivation from (1) Mesozoic eolianites of the western United States, (2) Paleozoic passive margin strata of the western United States, (3) Paleozoic passive margin strata of western Canada, (4) the Mogollon Highlands, (5) the Cordilleran magmatic arc, or (6) Yavapai-Mazatzal Province crystalline basement rocks. Referencing these provenance interpretations to their location and stratigraphic deposition age produces a detailed spatial and temporal record of sediment dispersal within the foreland basin system. Late Jurassic provenance is dominated by recycling of Mesozoic eolianites from sources in the Sevier thrust belt. Cretaceous-Eocene provenance is dominated by recycling of the passive margin, with increasing complexity upsection. We interpret that this provenance transition records a basin-wide unroofing sequence. A composite age-probability plot of 1539 young (<250 Ma) detrital zircons reveals at least four age-abundance peaks that we interpret to represent periodic high-flux magmatism in the Cordilleran arc.

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Geology of the Inyo Mountains Volcanic Complex: Implications for Jurassic paleogeography of the Sierran magmatic arc in eastern California

Cited by 52 publications

References 0 publications

Guadalupe pluton–Mariposa Formation age relationships in the southern Sierran Foothills: Onset of Mesozoic subduction in northern California?

Guadalupe pluton–Mariposa Formation age relationships in the southern Sierran Foothills: Onset of Mesozoic subduction in northern California?

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

Detrital zircon geochronology of Cordilleran retroarc foreland basin strata, western North America

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