Oligocene clockwise rotations along the eastern Pamir:Tectonic and   paleogeographic implications

doi:10.1002/2013TC003388

CORC > 北京大学 > 地球与空间科学学院

	Oligocene clockwise rotations along the eastern Pamir:Tectonic and paleogeographic implications
	Bosboom, Roderic ; Dupont-Nivet, Guillaume ; Huang, Wentao ; Yang, Wei ; Guo, ZhaoJie
刊名	tectonics
	2014
关键词	tectonic rotation Tarim Basin Pamir Cenozoic paleomagnetism NORTHERN TIBETAN PLATEAU ALTYN-TAGH FAULT CRETACEOUS RED BEDS WESTERN TARIM BASIN CHINESE TIAN-SHAN CENTRAL-ASIA TIEN-SHAN NORTHWEST CHINA CENOZOIC DEFORMATION EURASIA COLLISION
DOI	10.1002/2013TC003388
英文摘要	Despite the importance of the Pamir range in controlling Asian paleoenvironments and land-sea paleogeography, its tectonic evolution remains poorly constrained in time and space, hindering its potential for understanding deep to surface processes. We provide here new constraints on vertical-axis tectonic rotations from the southwest Tarim Basin along the eastern flank of the Pamir arcuate range based on paleomagnetic results. Two well-dated Eocene to Oligocene sections, previously analyzed using biostratigraphy and magnetostratigraphy, yield consistently clockwise rotations of 21.64.2 degrees in 41 to 36Ma strata then 17.16.5 degrees in 33 to 28Ma strata at the Aertashi section and 14.211.5 degrees in 41 to 40Ma strata at the Kezi section. Combined with a regional review of existing paleomagnetic studies, these results indicate that most of the clockwise rotations along the eastern Pamir occurred during Oligocene times and did not extend systematically and regionally into the Tarim Basin. In contrast, on the western flank of the Pamir tectonic rotations in Cretaceous to Neogene strata are regionally extensive and systematically counterclockwise throughout the Afghan-Tajik Basin. This timing and pattern of rotations is consistent with paleogeographic reconstructions of the regional sea retreat out of Central Asia and supports a two-stage kinematic model: (1) symmetric rotations of either flanks of the Pamir arcuate range until Oligocene times followed by (2) continued rotations on its western flank associated with radial thrusting and, along the eastern flank, no further rotations due to decoupled transfer slip starting in the Early Miocene.; Geochemistry & Geophysics; SCI(E); EI; 3; ARTICLE; R.E.Bosboom@uu.nl; 2; 53-66; 33
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/216990]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Bosboom, Roderic,Dupont-Nivet, Guillaume,Huang, Wentao,et al. Oligocene clockwise rotations along the eastern Pamir:Tectonic and paleogeographic implications[J]. tectonics,2014.
APA	Bosboom, Roderic,Dupont-Nivet, Guillaume,Huang, Wentao,Yang, Wei,&Guo, ZhaoJie.(2014).Oligocene clockwise rotations along the eastern Pamir:Tectonic and paleogeographic implications.tectonics.
MLA	Bosboom, Roderic,et al."Oligocene clockwise rotations along the eastern Pamir:Tectonic and paleogeographic implications".tectonics (2014).