气候变化领域集成服务门户(CCPortal): Northern Lhasa thrust belt of central Tibet: Evidence of Cretaceous-early Cenozoic shortening within a passive roof thrust system?

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DOI	10.1130/2014.2507(03)
	Northern Lhasa thrust belt of central Tibet: Evidence of Cretaceous-early Cenozoic shortening within a passive roof thrust system?
	Volkmer, John E.; Kapp, Paul; Horton, Brian K.; Gehrels, George E.; Minervini, Joseph M.; Ding, Lin
通讯作者	Volkmer, JE (通讯作者)
发表日期	2014
ISSN	0072-1077
起始页码	59
结束页码	70
卷号	507
英文摘要	The Lhasa and Qiangtang terranes of Tibet collided following Late Jurassic-Early Cretaceous consumption of oceanic lithosphere along the intervening Bangong suture zone. This continental collision led to the development of the south-directed, northern Lhasa thrust belt that is exposed similar to 1200 km along strike in central Tibet. We conducted geologic mapping and stratigraphic and geothermochronologic studies in the Duba region of the northern Lhasa terrane, located similar to 250 km northwest of the city of Lhasa. In the Duba region, granites were emplaced into the mid-crust between 139 and 121 Ma and subsequently exhumed and juxtaposed against Cretaceous strata between 105 and 90 Ma in the footwall of an interpreted passive roof thrust system. We suggest that this structural style dominates the Cretaceous-early Cenozoic evolution of the northern Lhasa thrust belt and provides an explanation for the scarcity of basement rock exposures in the Lhasa terrane despite >50% upper crustal shortening. Furthermore, we highlight similarities between the collision-related northern Lhasa and Tethyan Himalayan thrust belts, both of which are bound by sutures and associated with underthrusting of lower plate lithosphere.
关键词	HIMALAYAN CRYSTALLINE COMPLEX TECTONIC EVOLUTION BASIN EVOLUTION SOUTHERN TIBET WESTERN TIBET LEADING-EDGE SUTURE ZONE PLATEAU GEOMETRY ENVIRONMENTS
语种	英语
WOS研究方向	Geology
WOS类目	Geology
WOS记录号	WOS:000345991800005
来源期刊	TOWARD AN IMPROVED UNDERSTANDING OF UPLIFT MECHANISMS AND THE ELEVATION HISTORY OF THE TIBETAN PLATEAU
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258393
推荐引用方式 GB/T 7714	Volkmer, John E.,Kapp, Paul,Horton, Brian K.,et al. Northern Lhasa thrust belt of central Tibet: Evidence of Cretaceous-early Cenozoic shortening within a passive roof thrust system?[J]. 中国科学院青藏高原研究所,2014,507.
APA	Volkmer, John E.,Kapp, Paul,Horton, Brian K.,Gehrels, George E.,Minervini, Joseph M.,&Ding, Lin.(2014).Northern Lhasa thrust belt of central Tibet: Evidence of Cretaceous-early Cenozoic shortening within a passive roof thrust system?.TOWARD AN IMPROVED UNDERSTANDING OF UPLIFT MECHANISMS AND THE ELEVATION HISTORY OF THE TIBETAN PLATEAU,507.
MLA	Volkmer, John E.,et al."Northern Lhasa thrust belt of central Tibet: Evidence of Cretaceous-early Cenozoic shortening within a passive roof thrust system?".TOWARD AN IMPROVED UNDERSTANDING OF UPLIFT MECHANISMS AND THE ELEVATION HISTORY OF THE TIBETAN PLATEAU 507(2014).