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A Cretaceous-Eocene depositional age for the Fenghuoshan Group, Hoh Xil Basin: Implications for the tectonic evolution of the northern Tibet Plateau
Staisch, LM (Staisch, Lydia M.)[ 1 ]; Niemi, NA (Niemi, Nathan A.)[ 1 ]; Hong, C (Hong, Chang)[ 2 ]; Clark, MK (Clark, Marin K.)[ 1 ]; Rowley, DB (Rowley, David B.)[ 3 ]; Currie, B (Currie, Brian)[ 4 ]
2014-03-15
Source PublicationTECTONICS
Volume33Issue:3Pages:281-301
Subtype期刊论文
Abstract

The Fenghuoshan Group marks the initiation of terrestrial deposition in the Hoh Xil Basin and preserves the first evidence of uplift above sea level of northern Tibet. The depositional age of the Fenghuoshan Group is debated as are the stratigraphic relationships between the Fenghuoshan Group and other terrestrial sedimentary units in the Hoh Xil Basin. We present new radiometric dates and a compilation of published biostratigraphic data which are used to reinterpret existing magnetostratigraphic data from the Fenghuoshan Group. From these data, we infer an 85-51Ma depositional age range for the Fenghuoshan Group. U-Pb detrital zircon age spectra from this unit are compared to age spectra from Tibetan terranes and Mesozoic sedimentary sequences to determine a possible source terrane for Fenghuoshan Group strata. We propose that these strata were sourced from the Qiangtang Terrane and may share a common sediment source with Cretaceous sedimentary rocks in Nima Basin. Field relationships and compiled biostratigraphic data indicate that the Fenghuoshan and Tuotuohe Groups are temporally distinct units. We report late Oligocene ages for undeformed basalt flows that cap tilted Fenghuoshan Group strata. Together, our age constraints and field relationships imply exhumation of the central Qiangtang Terrane from the Late Cretaceous to earliest Eocene, followed by Eocene-Oligocene deformation, and shortening of the northern Qiangtang and southern Songpan-Ganzi terranes. Crustal shortening within the Hoh Xil Basin ceased by late Oligocene time as is evident from flat-lying basaltic rocks, which cap older, deformed strata.

DOI10.1002/2013TC003367
Indexed BySCI ; EI
Language英语
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9784
Collection古环境研究室
Corresponding AuthorStaisch, LM (Staisch, Lydia M.)[ 1 ]
Affiliation1.Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, Michigan, USA;
2.Institute of EarthEnvironment, CAS, Xi’an, China;
3.Department of the Geophysical Sciences, University of Chicago, Chicago, Illinois, USA;
4.Department of Geology and Environmental Earth Science, Miami University, Oxford, Ohio, USA
Recommended Citation
GB/T 7714
Staisch, LM ,Niemi, NA ,Hong, C ,et al. A Cretaceous-Eocene depositional age for the Fenghuoshan Group, Hoh Xil Basin: Implications for the tectonic evolution of the northern Tibet Plateau[J]. TECTONICS,2014,33(3):281-301.
APA Staisch, LM ,Niemi, NA ,Hong, C ,Clark, MK ,Rowley, DB ,&Currie, B .(2014).A Cretaceous-Eocene depositional age for the Fenghuoshan Group, Hoh Xil Basin: Implications for the tectonic evolution of the northern Tibet Plateau.TECTONICS,33(3),281-301.
MLA Staisch, LM ,et al."A Cretaceous-Eocene depositional age for the Fenghuoshan Group, Hoh Xil Basin: Implications for the tectonic evolution of the northern Tibet Plateau".TECTONICS 33.3(2014):281-301.
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