Structure and stratigraphy of Upper Cretaceous and Paleogene strata (North Horn Formation), eastern San Pitch Mountains, Utah — Sedimentation at the front of the Sevier orogenic belt

Lawton, Timothy F.; Talling, Peter J.; Hobbs, Robert S.; Trexler, James H.; Weiss, Malcolm P.; Burbank, Douglas W.

doi:10.3133/b1787ii

Cited by 9 publications

(2 citation statements)

References 10 publications

(13 reference statements)

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“…Displacement along the PXT duplexes resulted in the Levan culmination (Lawton et al, 2007), which exhumed mainly fine-grained Jurassic rocks (DeCelles & Coogan, 2006). At depth, the Gunnison thrust translated Cambrian rocks over Middle Jurassic strata, accompanied by frontal back-thrusting, development of the Sanpete Valley antiform (Figure 1), and growth of the Late Campanian-Maastrichtian Axhandle wedge-top basin (Lawton & Trexler, 1991;Lawton et al, 1993;Talling et al, 1994). The PVT, PXT, and GT, all rooted beneath the Sevier culmination, formed antiformal duplexes and frontal triangle zones in the former Canyon Range footwall, leading to the formation of growth strata within the CRC (DeCelles & Coogan, 2006).…”

Section: 1029/2019tc005794mentioning

confidence: 99%

“…These ages are supported by Cenomanian apatite fission-track ages from the lower IG conglomerates in Salina (Willis, 1986). The ages and depositional environments of the CRC and IG have been crucial for bracketing the age of SFTB deformation, thus providing temporal relationships between shortening deformation and proximal sedimentation (DeCelles & Coogan, 2006;Fouch et al, 1983;Lawton, 1985Lawton, , 1986bLawton et al, 1993Lawton et al, , 2007Lawton & Trexler, 1991;Talling et al, 1995). However, these timing constraints are inextricably linked, and hence, arguments surrounding the temporal and causal linkages between thrusting and sedimentation may be highly circular without sufficient temporal resolution.…”

Section: Synorogenic Foreland Basin Depositsmentioning

confidence: 99%

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Thermochronological and Geochronological Constraints on Late Cretaceous Unroofing and Proximal Sedimentation in the Sevier Orogenic Belt, Utah

et al. 2020

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A source‐to‐sink analysis incorporating geochronometric and thermochronometric data from the Sevier fold‐thrust belt (SFTB) and proximal synorogenic strata of the Canyon Range Conglomerate (CRC) and Indianola Group (IG) provides new insights into orogenic exhumation, erosional unroofing, and the interplay between thrusting and coarse clastic deposition in the Cretaceous Cordilleran foreland basin of western North America. Zircon (U‐Th)/He ages from the Pavant and Nebo thrust sheets record significant Cenomanian cooling indicative of synchronous exhumation and thrusting along a large segment of the SFTB in central and northern Utah. Detrital zircon (U‐Th)/He (DZHe) ages indistinguishable from depositional ages from the Cenomanian Dakota Formation and lower CRC also record rapid unroofing of the SFTB and synchronous deposition. DZHe data from wedge‐top deposits of the CRC record two significant unroofing episodes: Albo‐Cenomanian exhumation of the Pavant thrust and progressive unroofing of the Canyon Range culmination. For the IG, the presence of Paleozoic DZHe ages along with Paleozoic‐Mesozoic DZ U‐Pb ages in the Cenomanian Sanpete Formation suggests derivation from Paleozoic to Jurassic strata exhumed in the frontal Pavant and Nebo thrust sheets. After the Cenomanian episode of rapid exhumation, proximal foredeep strata recorded a widespread DZ provenance shift in the Turonian. Short DZHe lag time values from Campanian CRC and IG deposits reveal rapid exhumation of the SFTB during the Campanian. The synchroneity of major shortening and Campanian and Cenomanian changes in foreland basin architecture and provenance supports models proposing that active shortening in the fold‐thrust belt coincides with coarse clastic influx in foreland basins.

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Section: 1029/2019tc005794mentioning

confidence: 99%

Section: Synorogenic Foreland Basin Depositsmentioning

confidence: 99%

Thermochronological and Geochronological Constraints on Late Cretaceous Unroofing and Proximal Sedimentation in the Sevier Orogenic Belt, Utah

et al. 2020

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Faunal implications of an environmental change before the Cretaceous-Tertiary (K-T) transition in central Utah

Difley

Ekdale

2002

Cretaceous Research

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Magnetostratigraphic Chronology of Cretaceous-to-Eocene Thrust Belt Evolution, Central Utah, USA

Talling¹,

Burbank²,

Lawton³

et al. 1994

The Journal of Geology

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The Axhandle basin in central Utah is a piggyback basin that formed above the Gunnison thrust system. The basin contains-1 km of upper Cretaceous-to-Eocene strata of the North Horn and lower Flagstaff Limestone formations. A significantly more exact chronology, based on magnetic polarity stratigraphy, has been developed for the basinfilling strata. The new data provide a detailed temporal framework for the interpretation of the depositional and tectonic evolution of the basin during chrons 33-21 (-75-49 Ma). Tectonic subsidence curves and stratigraphic relations along the eastern basin margin define two episodes of motion on the Gunnison thrust system. The majority of tectonic shortening on the system occurred between 83-75 Ma and caused widespread non-deposition within the Axhandle basin. A second episode of motion, in detail comprising of four separate periods of backthrusting, occurred between 70-60 Ma. The Canyon Range, Pavant, and Nebo thrust sheets were emplaced 30-50 km to the west of the Axhandle basin between 97 and 74 Ma. The initial episode of motion on the Gunnison thrust system was thus partly coeval with the emplacement of these thrust sheets. Uplift and erosion above the San Rafael Swell, a basement flexure located-100 km east of the Axhandle basin, occurred at the same time-between 70 and-60 Ma-as the second episode of motion on the Gunnison thrust system. These age constraints clearly demonstrate coeval motion on multiple contractional structures. Episodes of thrust wedge reorganization with durations of 5-10 m.y. appear to be separated by quiescent periods of up to 5 m.y. Evolution of the thrust belt in NE Utah and Wyoming was remarkably similar to that in central Utah 300 km to their south. This similarity suggests that the tectonic stresses driving the thrust wedge were relatively uniform along strike.

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Structure and stratigraphy of Upper Cretaceous and Paleogene strata (North Horn Formation), eastern San Pitch Mountains, Utah — Sedimentation at the front of the Sevier orogenic belt

Cited by 9 publications

References 10 publications

Thermochronological and Geochronological Constraints on Late Cretaceous Unroofing and Proximal Sedimentation in the Sevier Orogenic Belt, Utah

Thermochronological and Geochronological Constraints on Late Cretaceous Unroofing and Proximal Sedimentation in the Sevier Orogenic Belt, Utah

Faunal implications of an environmental change before the Cretaceous-Tertiary (K-T) transition in central Utah

Magnetostratigraphic Chronology of Cretaceous-to-Eocene Thrust Belt Evolution, Central Utah, USA

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