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DOI	10.1007/s11430-009-0177-x
	An alternative tectonic model for the Yarlung Zangbo suture zone
	Liu XiaoHan; Ju YiTai; Wei LiJie; Li GuangWei
通讯作者	Liu, XH (通讯作者)
发表日期	2010
ISSN	1674-7313
EISSN	1869-1897
起始页码	27
结束页码	41
卷号	53 期号:1
英文摘要	The new field investigations along the Yarlung Zangbo ophiolites zone show that these series underwent low green-schist metamorphism and were then fractured and occurred as slabs in tectonic melanges, without regional tectonic polarity. No large shear zone in north-south direction has been identified between ophiolite bodies and flysch layers on both side and a conformable contact relationship can be observed locally between them. A great mass of tectonic melange has been substantiated as submarine olistolith bodies. The Mesozoic sedimentary facies and its evolution in both north and south of the ophiolite zone are corresponding in time. The ophiolite zone has often been divided into parallel branches, separated by narrow flysch slats. There is also a similarity of the Paleozoic and the basement of the High Himalaya, Lhasa and Qiangtang Terranes, and they are distinctly different from those of the Indian continent. The geologic information does not warrant a postulate that the Himalaya and Tibet were once separated by a great ocean; it is therefore consistent with an alternative tectonic model by back-arc basin collapse with its juvenile narrow oceanic crust. The real plate tectonic suture, the Neotethys might be covered under the Miocene Siwalik molasse in the southern slope of the High Himalaya range. Based on the new model, the Neotethyan ocean floor was subducted beneath the Asia since the Late Triassic. The outer continental margin of Eurasia was split from the Lhasa Terrane so that a back-arc basin came into existence. Hemi-pelagic and deep sea sediments were deposited before the Late Cretaceous flysch sedimentation, with the linear juvenile oceanic crust when back-arc volcanism occurred in the Gandese region. The Yarlung Zangbo back-arc basin was eventually eliminated when the High Himalayas were sutured onto Eurasia. The ocean floor lightly underthrusted to north and south sides, sediments of the basin were deformed as fold-thrusting. The Neotethys was eliminated during the Tertiary when India collided with Himalaya arc from the Oligocene. The crust of southern Tibet suffered penetrative shortening, the ophiolite zone became exposed during regional uplifting, and the South Tibet Detachment System, doming in southern Tibet and rifting in a north-south direction since the Middle Miocene Epoch.
关键词	FORE-ARC BASIN SOUTHERN TIBET XIGAZE OPHIOLITE EVOLUTION INDIA SOUTHEASTERN HIMALAYA HISTORY LHASA METAMORPHISM
英文关键词	Yarlung Zangbo Ophiolite Zone; plate boundary; continental marginal arc; relic back-arc basin; alternative tectonic model
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000276546600003
来源期刊	SCIENCE CHINA-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/257735
推荐引用方式 GB/T 7714	Liu XiaoHan,Ju YiTai,Wei LiJie,et al. An alternative tectonic model for the Yarlung Zangbo suture zone[J]. 中国科学院青藏高原研究所,2010,53(1).
APA	Liu XiaoHan,Ju YiTai,Wei LiJie,&Li GuangWei.(2010).An alternative tectonic model for the Yarlung Zangbo suture zone.SCIENCE CHINA-EARTH SCIENCES,53(1).
MLA	Liu XiaoHan,et al."An alternative tectonic model for the Yarlung Zangbo suture zone".SCIENCE CHINA-EARTH SCIENCES 53.1(2010).