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A Fragment of Argoland From East Gondwana in the NE Himalaya

文献类型：期刊论文

作者Zhang, Ji'en1; Xiao, Wenjiao1,2; Wakabayashi, John3; Windley, Brian F.4; Han, Chunming1
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
出版日期2022-02-01
卷号127期号:2页码:20
关键词Longzi block NE Himalaya Argoland Early Cretaceous Late Jurassic continental sliver
ISSN号2169-9313
DOI10.1029/2021JB022631
英文摘要Previous studies concluded that a Trans-Tethyan oceanic subduction zone existed prior to Paleogene India-Eurasia collision, when the ocean lacked intervening continental slivers. In this paper, we present the first report of Early Cretaceous shortening and 152.8 Ma alkali magmatism in the continental sliver Longzi block, a ca. 750 km E-W by ca. 130 km N-S tract of the NE Himalaya within the Himalaya orogen. The Longzi block contains overturned south-vergent folds in Triassic-Lower Cretaceous strata intruded by 136-123 Ma mafic-dioritic-dacite dikes, which constrain the time of Early Cretaceous shortening. Triassic strata with NW Australian affinity and Late Jurassic conglomerates derived from northern India record the pre-rift history. Evidence for the rifting includes 152.8-145 Ma alkali intrusive rocks, a Late Jurassic unconformity, rapid changes in sediment thickness, and the water depth during deposition of Upper Jurassic strata. The rifting event was coeval with the formation of 152-155 Ma oceanic crust in the NE Indian Ocean and of a Late Jurassic submarine escarpment with 1,200 m of sediments offshore of NW Australia. These data show that the Longzi block was part of westernmost Argoland, a continental sliver that rifted from East Gondwana. The Longzi block subsequently collided with a N-dipping Trans-Tethyan intra-oceanic subduction zone in the Early Cretaceous to generate the relevant shortening, long before the Paleocene continent-continent collision along the Yarlung-Tsangpo suture zone. This rift-collision in the Himalayan region reflects the Mesozoic archipelagic paleogeography in eastern Neotethys, which was preceded by ocean closure, and the two-stage collision of India-Eurasia in the Cenozoic.
WOS关键词LARGE IGNEOUS PROVINCE ; TSANGPO SUTURE ZONE ; BIMODAL INTRUSIVE ROCKS ; PB ZIRCON GEOCHRONOLOGY ; INDO-BURMA RANGE ; TETHYAN HIMALAYA ; SOUTH TIBET ; MAFIC ROCKS ; LANGJIEXUE GROUP ; GREATER INDIA
资助项目NSFC[41888101] ; NSFC[42172247] ; Strategic Priority Research Program (B) of CAS[XDB18030103] ; National Key R & D Program of China[2017YFC0601206]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000765643700044
出版者AMER GEOPHYSICAL UNION
资助机构NSFC ; NSFC ; NSFC ; NSFC ; Strategic Priority Research Program (B) of CAS ; Strategic Priority Research Program (B) of CAS ; Strategic Priority Research Program (B) of CAS ; Strategic Priority Research Program (B) of CAS ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; NSFC ; NSFC ; NSFC ; NSFC ; Strategic Priority Research Program (B) of CAS ; Strategic Priority Research Program (B) of CAS ; Strategic Priority Research Program (B) of CAS ; Strategic Priority Research Program (B) of CAS ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; NSFC ; NSFC ; NSFC ; NSFC ; Strategic Priority Research Program (B) of CAS ; Strategic Priority Research Program (B) of CAS ; Strategic Priority Research Program (B) of CAS ; Strategic Priority Research Program (B) of CAS ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; NSFC ; NSFC ; NSFC ; NSFC ; Strategic Priority Research Program (B) of CAS ; Strategic Priority Research Program (B) of CAS ; Strategic Priority Research Program (B) of CAS ; Strategic Priority Research Program (B) of CAS ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/104945]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Zhang, Ji'en
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
2.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Res Ctr Mineral Resources, Urumqi, Xinjiang, Peoples R China
3.Calif State Univ Fresno, Dept Earth & Environm Sci, Fresno, CA 93740 USA
4.Univ Leicester, Sch Geog Geol & Environm, Leicester, Leics, England
推荐引用方式
GB/T 7714		 Zhang, Ji'en,Xiao, Wenjiao,Wakabayashi, John,et al. A Fragment of Argoland From East Gondwana in the NE Himalaya[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2022,127(2):20.
APA Zhang, Ji'en,Xiao, Wenjiao,Wakabayashi, John,Windley, Brian F.,&Han, Chunming.(2022).A Fragment of Argoland From East Gondwana in the NE Himalaya.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,127(2),20.
MLA Zhang, Ji'en,et al."A Fragment of Argoland From East Gondwana in the NE Himalaya".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 127.2(2022):20.

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来源：地质与地球物理研究所

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