Emplacement and deformation history of the western margin of the Idaho batholith near McCall, Idaho: Influence of a major terrane boundary

Manduca, Cathryn A.; Kuntz, Mel A.; Silver, Leon T.

doi:10.1130/0016-7606(1993)105<0749:eadhot>2.3.co;2

Cited by 84 publications

(133 citation statements)

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“…Lund and Snee (1988) and Snee and others (1995) argued that older structures along the SRS indicate a period dextral transpression from 130 to 95 Ma and concluded that this is when juxtaposition of oceanic arc assemblages with the North American continent occurred. Selverstone, Wernicke, and Aliberti (1992) and Manduca, Kuntz, and Silver (1993) concur that an early history of strike-slip faulting probably occurred along the SRS but argue that this structural history is completely obscured by younger contractional deformation and that any strike-slip displacement took place prior to 118 Ma and possibly prior to 130 Ma. Gillaspy and others (2000), in contrast, have concluded that current structures within the SRS record dextral transpression.…”

mentioning

confidence: 86%

“…Generalized pre-Cenozoic geology of the western United States Cordillera. BRT is Black Rock terrane, EKT is eastern Klamath terrane, G is Gerlach area, MSLF is Mojave-Snow Lake fault (location from Schweickert and Lahren, 1990), NST is northern Sierra terrane, PNR is Pine Nut Range, PT is Pueblo terrane, OW is Owyhee County area, SRS is Salmon River suture zone (location from Manduca, Kuntz, and Silver, 1993), WKT is western Klamath terranes, WNS is western Nevada shear zone, and WST is western Sierra terranes. Location of MSLF, SRS, and WNS shown solid where known and dashed where inferred.…”

mentioning

confidence: 99%

“…Abrupt contrast of initial Sr isotopic compositions across the SRS suggests that the suture is a deep-seated, near-vertical tectonic boundary that juxtaposes two distinct lithospheres: oceanic on the west and continental on the east (Armstrong, Taubeneck, and Hales, 1977;Lund, ms;Criss and Fleck, 1987). This striking feature provides a compelling argument that the SRS likely originated as a major strike-slip boundary (Lund and Snee, 1988), but thinking about this concept has been overshadowed by studies indicating that current structures along the SRS record dip-slip contractional deformation between ϳ110 to 75 Ma (Strayer and others, 1989;Manduca, Kuntz, and Silver, 1993). Thus, the earlier history of the SRS is not clearly understood.…”

mentioning

confidence: 99%

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New evidence for Cretaceous strike-slip faulting in the United States Cordillera and implications for terrane-displacement, deformation patterns, and plutonism

Wyld¹,

Wright²

2001

American Journal of Science

105

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ABSTRACT. Early to mid-Cretaceous dextral strike-slip faulting, involving up to 400 km displacement, has been documented in the southern Sierra Nevada of California. In western Idaho, the Salmon River suture juxtaposes unrelated oceanic and continental rocks along a major, near-vertical shear zone that was active in the Early to mid-Cretaceous. These two structural zones have been treated as separate entities; however, new data indicate that they likely connect via a structural discontinuity in northwest Nevada and southeast Oregon, herein called the western Nevada shear zone (WNS).Current structures within the WNS record dip-slip contractional deformation; however, regional relations (structural and stratigraphic) indicate a mismatch in the early Mesozoic geology of rocks across the WNS that is best explained by dextral strike-slip displacement of several 100 km. These relations argue that an early strike-slip structure along the WNS was reactivated and obscured during later regional shortening deformation, most likely related to the Cretaceous Sevier orogeny. The WNS is along strike and broadly coeval with the Salmon River suture zone and strike-slip boundaries in the Sierra Nevada. We hypothesize that all these features are related elements of a major structural boundary in the western United States Cordillera. This boundary is interpreted to have accommodated significant dextral strike-slip displacement of outboard arc terranes of the Cordillera in the Early Cretaceous, followed by reactivation as a localized contractional zone in the mid-Cretaceous during the Sevier orogeny. Cretaceous batholiths of the United States Cordillera closely parallel the boundary, which we suggest formed a major crustal flaw that localized and facilitated emplacement of arc magmas.

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confidence: 86%

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confidence: 99%

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confidence: 99%

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New evidence for Cretaceous strike-slip faulting in the United States Cordillera and implications for terrane-displacement, deformation patterns, and plutonism

Wyld¹,

Wright²

2001

American Journal of Science

105

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“…Similar segments of the Cordillera were active in the Early Cretaceous. An additional episode of Early Cretaceous magmatism is evident in the Suture Zone Suite of the western margin of the Idaho Batholith (Manduca et al, 1993;Gaschnig et al, 2017b).…”

Section: Analysis and Interpretationmentioning

confidence: 99%

A Late Jurassic to Early Cretaceous record of orogenic wedge evolution in the Western Interior basin, USA and Canada

et al. 2018

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The Late Jurassic to Early Cretaceous fill of the Western Interior foreland basin is characterized using geochronological data in order to assess the stratigraphic expression of wedge-top geomorphology, as controlled by sediment cover and denudation. In northern Montana, USA, and Alberta, Canada, wedge-top deposits are poorly preserved; however, their former presence may be inferred from the detrital record in the foreland basin. We present new U/Pb detrital zircon data from nine samples collected near Great Falls, Montana, augmented with field data. The stratigraphy at Great Falls is characterized by Late Jurassic marine and nonmarine deposits, which are truncated by a basinwide sub-Cretaceous unconformity. Aptian and lower Albian strata overlying the unconformity are dominated by nonmarine deposits, which transition up-section into a predominantly marine succession related to a major transgression of the Boreal Seaway in the Albian.Detrital zircon grains from Great Falls strata yield age spectra that can be subdivided into three groups using multidimensional scaling. Group 1 is characterized by diverse zircon populations, which are interpreted to record recycling of pre-Cordilleran sedimentary strata transported via foreland basin-axial river systems with headwaters in the southwestern United States. Group 2 is characterized by the dominance of Mesozoic detrital zircon grains, which are interpreted to record sediment dispersal by fluvial systems with headwaters in the Cordillera. Group 3 is intermediate between groups 1 and 2, based on its proportion of Mesozoic zircon grains. This group records a diversification of the provenance from one dominated by Cordilleran igneous rocks to include recycled sedimentary strata.New data are integrated with three other data sets from Montana and Alberta such that stratal thicknesses (a proxy for accommodation development) and provenance evolution can be compared across the basin. The detrital record in each area, which transitions from diverse provenance to predominantly Cordilleran through the entire stratigraphic section, can be linked to the burial of the pre-foreland strata in the wedge-top depozone. This record elucidates a period of evolution of the western margin of North America to a more Andean-type system with primary input to the basin from an active magmatic arc.

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“…The Blue Mountains Province in central and eastern Oregon has undergone 60° of clockwise rotation since Jurassic time (Wilson and Cox, 1980;Mankinen, 1984;Mankinen and Irwin , 1990), and 37.5° ± 9.6° of rotation since Albian time (Housen and Dorsey, 2002). In their 100 Ma reconstruction, Wyld et al (2006) held the eastern edge of the Blue Mountains Province fi xed relative to North America, as required by 110-90 Ma intrusions of the western Idaho shear zone (Manduca et al, 1993;Snee et al, 1995), while restoring the rest of the province 38° counterclockwise. Moreover, Wyld et al (2006) restored ~50 km of shortening and 40 km of dextral offset in the western Idaho shear zone, shifting the Blue Mountains Province west and south.…”

Section: Potential Source Regions For the Hornbrook Formationmentioning

confidence: 99%

Understanding a critical basinal link in Cretaceous Cordilleran paleogeography: Detailed provenance of the Hornbrook Formation, Oregon and California

Surpless¹,

Beverly²

2013

Geological Society of America Bulletin

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Emplacement and deformation history of the western margin of the Idaho batholith near McCall, Idaho: Influence of a major terrane boundary

Cited by 84 publications

References 0 publications

New evidence for Cretaceous strike-slip faulting in the United States Cordillera and implications for terrane-displacement, deformation patterns, and plutonism

New evidence for Cretaceous strike-slip faulting in the United States Cordillera and implications for terrane-displacement, deformation patterns, and plutonism

A Late Jurassic to Early Cretaceous record of orogenic wedge evolution in the Western Interior basin, USA and Canada

Understanding a critical basinal link in Cretaceous Cordilleran paleogeography: Detailed provenance of the Hornbrook Formation, Oregon and California

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