气候变化领域集成服务门户(CCPortal): Paleocene-Eocene foreland basin evolution in the Himalaya of southern Tibet and Nepal: Implications for the age of initial India-Asia collision

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DOI	10.1002/2014TC003522
	Paleocene-Eocene foreland basin evolution in the Himalaya of southern Tibet and Nepal: Implications for the age of initial India-Asia collision
	DeCelles, P. G.; Kapp, P.; Gehrels, G. E.; Ding, L.
通讯作者	DeCelles, PG (通讯作者)
发表日期	2014
ISSN	0278-7407
EISSN	1944-9194
起始页码	824
结束页码	849
卷号	33 期号:5
英文摘要	Siliciclastic sedimentary rocks derived from the southern Lhasa terrane, sitting depositionally upon rocks of the northern Indian passive continental margin, provide an estimate of the age of initial contact between the continental parts of the Indian and Asian plates. We report sedimentological, sedimentary petrological, and geochronological data from Upper Cretaceous-Paleocene strata in the Sangdanlin section, located along the southern flank of the Indus-Yarlung suture zone in southern Tibet. This is probably the most proximal, and therefore the oldest, record of the India-Asia collision. These strata were deposited by high-density turbidity currents (or concentrated density flows) and suspension settling of pelagic biogenic debris in a deep-marine setting. An abrupt change from quartz-arenitic to feldspatholithic sandstone compositions marks the transition from Indian to Asian sediment provenance. The abrupt compositional change is accompanied by changes in U-Pb ages of detrital zircons diagnostic of a sediment provenance reversal, from Indian to Asian sources. The timing of the transition is bracketed between similar to 60Ma and 58.5 +/- 0.6Ma by detrital zircon U-Pb ages and zircon U-Pb ages from a tuffaceous bed in the upper part of the section. In the context of a palinspastically restored regional paleogeographic framework, data from the Sangdanlin section combined with previously published data from the northern Tethyan Himalaya and the frontal Nepalese Lesser Himalaya and Subhimalaya suggest that a flexural wave migrated similar to 1300km southward across what is now the Himalayan thrust belt from Paleocene time to the present.
关键词	FOLD-THRUST BELT ZANGBO SUTURE ZONE HF ISOTOPIC CONSTRAINTS U-PB GEOCHRONOLOGY TECTONIC EVOLUTION GRAVITY-ANOMALIES CONTINENTAL COLLISION METAMORPHIC CORE WESTERN NEPAL ARC BASIN
英文关键词	India-Asia collision; foreland basin; Greater India basin; Indus-Yarlung suture; Himalayan thrust belt
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000337630400011
来源期刊	TECTONICS
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/258273
推荐引用方式 GB/T 7714	DeCelles, P. G.,Kapp, P.,Gehrels, G. E.,et al. Paleocene-Eocene foreland basin evolution in the Himalaya of southern Tibet and Nepal: Implications for the age of initial India-Asia collision[J]. 中国科学院青藏高原研究所,2014,33(5).
APA	DeCelles, P. G.,Kapp, P.,Gehrels, G. E.,&Ding, L..(2014).Paleocene-Eocene foreland basin evolution in the Himalaya of southern Tibet and Nepal: Implications for the age of initial India-Asia collision.TECTONICS,33(5).
MLA	DeCelles, P. G.,et al."Paleocene-Eocene foreland basin evolution in the Himalaya of southern Tibet and Nepal: Implications for the age of initial India-Asia collision".TECTONICS 33.5(2014).