Sedimentology and provenance of newly identified Upper Cretaceous trench basin strata, Dênggar, southern Tibet: Implications for development of the Eurasian margin prior to India–Asia collision

dc.contributor.authorOrme, Devon A.
dc.contributor.authorLaskowski, Andrew K.
dc.contributor.authorZilinsky, Misia F.
dc.contributor.authorChao, Wang
dc.contributor.authorGuo, Xudong
dc.contributor.authorCai, Fulong
dc.contributor.authorLin, Ding
dc.date.accessioned2022-09-01T20:27:06Z
dc.date.available2022-09-01T20:27:06Z
dc.date.issued2021-04
dc.descriptionThis is the peer reviewed version of the following article: [Sedimentology and provenance of newly identified Upper Cretaceous trench basin strata, Dênggar, southern Tibet: Implications for development of the Eurasian margin prior to India–Asia collision. Basin Research 33, 2 p1454-1473 (2021)], which has been published in final form at https://doi.org/10.1111/bre.12521. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions: https://authorservices.wiley.com/author-resources/Journal-Authors/licensing/self-archiving.html#3.en_US
dc.description.abstractTrench basins preserved along the southern margin of the Lhasa Terrane, Tibet, are sedimentologic records of convergent margin processes preceding Cenozoic India–Asia collision. We present new sedimentologic, petrographic and geochronologic data from the Rongmawa Formation and surrounding strata near Dênggar, Tibet, to determine depositional environment, provenance and age. Depositional ages range from ca. 92 to 87 Ma and lithofacies are consistent with deposition by low- and high-density turbidity currents and suspension settling of pelagic detritus in a deep-marine, trench basin setting. Sandstone modal analyses and U–Pb geochronology indicate that trench basin detritus in this region was derived from the Lhasa Terrane. We interpret that the Cretaceous subduction trench received detritus from an axial sediment dispersal system that transported sediment from headwaters in the central-southern Lhasa terrane near Lhasa City directly to the trench and then flowed westwards parallel to the trench. The preservation of trench basin strata deposited during Late Cretaceous time compared with the lack of trench deposits prior to ca. 92 Ma and after ca. 80 Ma suggests the margin experienced a period of significant accretion during this interval. In addition, deposition of trench basin strata occurred during Late Cretaceous adakitic magmatism and high-temperature metamorphism, which are hypothesized to be explained by subduction of an oceanic ridge or subduction zone retreat and related upper plate extension along the southern margin of the Lhasa terrane. Subduction of an oceanic ridge may provide a mechanism to potentially erode forearc basin strata and promote increased sediment delivery directly to the trench.en_US
dc.identifier.citationOrme, D. A., Laskowski, A. K., Zilinsky, M. F., Chao, W., Guo, X., Cai, F., & Lin, D. (2021). Sedimentology and provenance of newly identified Upper Cretaceous trench basin strata, Dênggar, southern Tibet: Implications for development of the Eurasian margin prior to India–Asia collision. Basin Research, 33(2), 1454-1473.en_US
dc.identifier.issn1365-2117
dc.identifier.urihttps://scholarworks.montana.edu/handle/1/17051
dc.language.isoen_USen_US
dc.publisherWileyen_US
dc.rightscopyright wiley 2021en_US
dc.rights.urihttp://web.archive.org/web/20190530141919/https://authorservices.wiley.com/author-resources/Journal-Authors/licensing/self-archiving.htmlen_US
dc.subjectDênggaren_US
dc.titleSedimentology and provenance of newly identified Upper Cretaceous trench basin strata, Dênggar, southern Tibet: Implications for development of the Eurasian margin prior to India–Asia collisionen_US
dc.typeArticleen_US
mus.citation.extentfirstpage1454en_US
mus.citation.extentlastpage1473en_US
mus.citation.issue2en_US
mus.citation.journaltitleBasin Researchen_US
mus.citation.volume33en_US
mus.identifier.doi10.1111/bre.12521en_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentEarth Sciences.en_US
mus.relation.universityMontana State University - Bozemanen_US

Files

Original bundle

Now showing 1 - 1 of 1
Thumbnail Image
Name:
orme-sedimentology-2021.pdf
Size:
429.15 KB
Format:
Adobe Portable Document Format
Description:

License bundle

Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
826 B
Format:
Item-specific license agreed upon to submission
Description:
Copyright (c) 2002-2022, LYRASIS. All rights reserved.