Triassic continental subduction in central Tibet and Mediterranean-style closure of the Paleo-Tethys Ocean

Geology ◽  
2008 ◽  
Vol 36 (5) ◽  
pp. 351 ◽  
Author(s):  
Alex Pullen ◽  
Paul Kapp ◽  
George E. Gehrels ◽  
Jeff D. Vervoort ◽  
Lin Ding
Keyword(s):  
Continental Subduction ◽  
Tethys Ocean ◽  
Central Tibet

Middle Permian adakitic granite dikes in the Sumdo region, central Lhasa terrane, central Tibet: Implications for the subduction of the Sumdo Paleo-Tethys Ocean

2021 ◽  
Vol 205 ◽  
pp. 104610
Author(s):  
Bin Wang ◽  
Chao-Ming Xie ◽  
Yong-sheng Dong ◽  
Jian-Jun Fan ◽  
Yun-Peng Yu ◽  
...  
Keyword(s):  
Middle Permian ◽  
Lhasa Terrane ◽  
Tethys Ocean ◽  
Central Tibet

Cretaceous structures in the Duolong region of central Tibet: Evidence for an accretionary wedge and closure of the Bangong–Nujiang Neo-Tethys Ocean

2017 ◽  
Vol 48 ◽  
pp. 110-123 ◽  
Author(s):  
Yiming Liu ◽  
Ming Wang ◽  
Cai Li ◽  
Chaoming Xie ◽  
Hongqi Chen ◽  
...  
Keyword(s):  
Accretionary Wedge ◽  
Tethys Ocean ◽  
Central Tibet

Early Permian mafic dikes in the Nagqu area, central Tibet, China, associated with embryonic oceanic crust of the Meso-Tethys Ocean

2017 ◽  
Vol 122 (6) ◽  
pp. 4172-4190 ◽  
Author(s):  
Sheng-Sheng Chen ◽  
Ren-Deng Shi ◽  
Wei-Ming Fan ◽  
Xiao-Han Gong ◽  
Kang Wu
Keyword(s):  
Oceanic Crust ◽  
Early Permian ◽  
Tethys Ocean ◽  
Central Tibet

Carboniferous and Permian evolutionary records for the Paleo-Tethys Ocean constrained by newly discovered Xiangtaohu ophiolites from central Qiangtang, central Tibet

Tectonics ◽  
2016 ◽  
Vol 35 (7) ◽  
pp. 1670-1686 ◽  
Author(s):  
Xiu-Zheng Zhang ◽  
Yong-Sheng Dong ◽  
Qiang Wang ◽  
Wei Dan ◽  
Chunfu Zhang ◽  
...  
Keyword(s):  
Tethys Ocean ◽  
Central Tibet

scholarly journals Geochemistry and Geochronology of Ophiolitic Rocks from the Dongco and Lanong Areas, Tibet: Insights into the Evolution History of the Bangong-Nujiang Tethys Ocean

Minerals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 466 ◽  
Author(s):  
Peng Yang ◽  
Qiangtai Huang ◽  
Renjie Zhou ◽  
Argyrios Kapsiotis ◽  
Bin Xia ◽  
...  
Keyword(s):  
Middle Part ◽  
Primitive Mantle ◽  
Cumulative Processes ◽  
Western Segment ◽  
History Of ◽  
Tethys Ocean ◽  
Central Tibet ◽  
Back Arc ◽  
Parental Melts ◽  
Ocean Ridge

The Bangong-Nujiang Suture Zone (BNSZ) in central Tibet hosts a series of dismembered Jurassic ophiolites that are widely considered as remnants of the vanished Meso-Tethys Ocean. In this study we present new compositional, isotopic, and geochronological data from anorthosites and gabbros of the Dongco and Lanong ophiolites in order to test several hypotheses about the nature of subduction in the Bangong-Nujiang Tethys Ocean (BNTO) during the Mesozoic era. Uranium–Pb dating of magmatic zircons separated from the Dongco anorthosites yielded an (average) age of 169.0 ± 3.7 Ma. Zircons separated from the Lanong anorthosites and gabbros yielded U–Pb ages of 166.8 ± 0.9 Ma and 167.3 ± 1.1 Ma, respectively. Zircons separated from the Dongco and Lanong anorthosites have positive εHf(t) values (5.62–15.94 and 10.37–14.95, respectively). The Dongco anorthosites have moderate initial 87Sr/86Sr (0.703477–0.704144) and high εNd(t) (+6.50 to +7.91). The Lanong anorthosites have high (87Sr/86Sr)i (0.706058–0.712952) and εNd(t) in the range of −1.56 to +2.02. Furthermore, the Lanong gabbros have high (87Sr/86Sr)i (0.705826–0.706613) and εNd(t) in the range of −0.79 to +4.20. Most gabbros from Dongco and a few gabbros from Lanong show normal mid-ocean ridge basalt (N-MORB)-like primitive mantle (PM)-normalized multi-element patterns. In contrast, most gabbros from Lanong show U-shaped chondrite-normalized rare earth element (REE) profiles. The investigated gabbros are characterized by wide ranges of δEu {(Eu)N/[(Sm)N*(Gd)N]1/2} values (0.83–2.53), indicating that some of them are cumulative rocks. The trace element contents of all anorthosite samples imply that their composition was controlled by cumulative processes. The geochemical and isotopic compositions of the non-cumulative gabbros from Dongco (δEu: 0.95–1.04) and Lanong (δEu: 0.83–1.03) indicate that their parental melts were derived from melting of heterogeneously depleted, juvenile mantle reservoirs. These rocks have arc-related affinities, indicating that their mantle sources were influenced by minor inputs of subducted lithospheric components. Our preferred hypothesis for the origin of the non-cumulative gabbros from Dongco is that they were formed in a transient back-arc basin (BAB) setting in the middle-western segment of the BNTO, whereas our preferred scenario about the origin of the non-cumulative gabbros from Lanong is that they were generated in a forearc setting in the middle part of the BNTO. We conclude that both geotectonic settings were developed in response to the northward subduction of the BNTO during the Middle Jurassic.

Diachronous closure of the Shuanghu Paleo-Tethys Ocean: Constraints from the Late Triassic Tanggula arc-related volcanism in the East Qiangtang subterrane, Central Tibet

Lithos ◽  
2019 ◽  
Vol 328-329 ◽  
pp. 182-199 ◽  
Author(s):  
Lu Lu ◽  
Yong Qin ◽  
Zhuang-Fu Li ◽  
Li-Long Yan ◽  
Xin Jin ◽  
...  
Keyword(s):  
Late Triassic ◽  
Tethys Ocean ◽  
Central Tibet

First report of eclogites from central Tibet, China: evidence for ultradeep continental subduction prior to the Cenozoic India-Asian collision

Terra Nova ◽  
2008 ◽  
Vol 20 (4) ◽  
pp. 302-308 ◽  
Author(s):  
Kai-Jun Zhang ◽  
Yu-Xiu Zhang ◽  
Xian-Chun Tang ◽  
Yao-Wu Xie ◽  
Shao-Li Sha ◽  
...  
Keyword(s):  
First Report ◽  
Continental Subduction ◽  
Central Tibet
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