气候变化领域集成服务门户(CCPortal): Provenance of Mesozoic clastic rocks within the Bangong-Nujiang suture zone, central Tibet: Implications for the age of the initial Lhasa-Qiangtang collision

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DOI	10.1016/j.jseaes.2017.08.019
	Provenance of Mesozoic clastic rocks within the Bangong-Nujiang suture zone, central Tibet: Implications for the age of the initial Lhasa-Qiangtang collision
	Li, Shun; Guilmette, Carl; Ding, Lin; Xu, Qiang; Fu, Jia-Jun; Yue, Ya-Hui
通讯作者	Li, S (通讯作者)
发表日期	2017
ISSN	1367-9120
EISSN	1878-5786
起始页码	469
结束页码	484
卷号	147
英文摘要	The Bangong-Nujiang suture zone, separating the Lhasa and Qiangtang blocks of the Tibetan Plateau, is marked by remnants of the Bangong-Nujiang oceanic basin. In the Gaize area of central Tibet, Mesozoic sedimentary strata recording the evolution of the basin and subsequent collision between these two blocks include the Upper Triassic-Lower Jurassic turbidites of the Mugagangri Group, the Upper Jurassic-Lower Cretaceous sandstone dominated Wuga and Shamuluo formations, and the Upper Cretaceous molasse deposits of the Jingzhushan Formation. The Shamuluo and Jingzhushan formations rest unconformably on the underlying Mugagangri Group and Wuga Formation, respectively. In this contribution, we analyze petrographic components of sandstones and U-Pb-Hf isotopic compositions of detrital zircons from the Wuga and Jingzhushan formations for the first time. Based on the youngest detrital zircon ages, the maximum depositional ages of the Wuga and Jingzhushan formations are suggested to be similar to 147-150 Ma and similar to 79-91 Ma, respectively. Petrographic and isotopic results indicate that sediments in the Wuga Formation were mainly sourced from the accretionary complex (preserved as the Mugagangri Group) in the north, while sediments in the Jingzhushan Formation have mixed sources from the Lhasa block, the Qiangtang block and the intervening suture zone. Provenance analysis, together with regional data, suggests that the Upper Jurassic-Lower Cretaceous Wuga and Shamuluo formations were deposited in a peripheral foreland basin and a residual-sea basin, respectively, in response to the Lhasa-Qiangtang collision, whereas the Upper Cretaceous Jingzhushan Formation reflects continental molasse deposition during the post-collisional stage. The development of the peripheral foreland basin evidenced by deposition of the Wuga Formation reveals that the age of the initial Lhasa-Qiangtang collision might be the latest Jurassic (similar to 150 Ma).
关键词	ZIRCON U-PB FORELAND BASIN EVOLUTION HF ISOTOPIC COMPOSITIONS TRIASSIC ARC MAGMATISM INDIA-ASIA COLLISION SOUTHERN TIBET TECTONIC EVOLUTION CRETACEOUS STRATA VOLCANIC-ROCKS LU-HF
英文关键词	Bangong-Nujiang suture zone; Wuga Formation; Provenance analysis; Detrital zircons; Peripheral foreland basin; Lhasa-Qiangtang collision
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000413125600034
来源期刊	JOURNAL OF ASIAN EARTH SCIENCES
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/259024
推荐引用方式 GB/T 7714	Li, Shun,Guilmette, Carl,Ding, Lin,et al. Provenance of Mesozoic clastic rocks within the Bangong-Nujiang suture zone, central Tibet: Implications for the age of the initial Lhasa-Qiangtang collision[J]. 中国科学院青藏高原研究所,2017,147.
APA	Li, Shun,Guilmette, Carl,Ding, Lin,Xu, Qiang,Fu, Jia-Jun,&Yue, Ya-Hui.(2017).Provenance of Mesozoic clastic rocks within the Bangong-Nujiang suture zone, central Tibet: Implications for the age of the initial Lhasa-Qiangtang collision.JOURNAL OF ASIAN EARTH SCIENCES,147.
MLA	Li, Shun,et al."Provenance of Mesozoic clastic rocks within the Bangong-Nujiang suture zone, central Tibet: Implications for the age of the initial Lhasa-Qiangtang collision".JOURNAL OF ASIAN EARTH SCIENCES 147(2017).