Two contrasting accretion v. collision orogenies: insights from Early Paleozoic polyphase metamorphism in the Altun–Qilian–North Qaidam orogenic system, NW China

2018 ◽  
Vol 474 (1) ◽  
pp. 153-181 ◽  
Author(s):  
Jianxin Zhang ◽  
Chris Mattinson ◽  
Shengyao Yu ◽  
Yunshuai Li ◽  
Xingxing Yu ◽  
...  

2021 ◽  
Vol 12 (4) ◽  
pp. 101170
Author(s):  
Yunfei Ren ◽  
Danling Chen ◽  
Haijie Wang ◽  
Xiaohui Zhu ◽  
Bowen Bai








2019 ◽  
Vol 12 (14) ◽  
Author(s):  
Xiaochen Zhao ◽  
Chiyang Liu ◽  
Liang Duan ◽  
Changqing Fu ◽  
Mengqi Jin


2020 ◽  
Vol 12 (1) ◽  
pp. 25-43
Author(s):  
Yuan Peng ◽  
Yongsheng Zhang ◽  
Eenyuan Xing ◽  
Linlin Wang

AbstractThe Zhongwunongshan Structural Belt (ZWSB) locates between the Olongbruk Microblock of North Qaidam and the South Qilian Block in China, and it has important implication for understanding the tectonic significance of North Qaidam. Nowadays, there are few discussion on the Caledonian tectonothermal events of the Zhongwunongshan Structural Belt, and there exist different opinions on provenance and tectonic environment of the Zhongwunongshan Group in the ZWSB and its adjacent North Qaidam. In this study, a comprehensive analysis of the detrital zircon geochronological research was carried out on the Zhongwunongshan Group. The detrital zircon U-Pb dating results showed two major populations. The first was Neoproterozoic (966-725 Ma) with a ∈Hf(t) = −15.9 to 9.5, and the other was late Early Paleozoic (460-434Ma) with a ∈Hf(t) = −9.6 to −3.1. In combination with previous research, the dominated provenances were found to be the Neoproterozoic granitic gneiss of the Yuqia-Shaliuhe HP-UHP metamorphic belt and the late Early Paleozoic granite of the Tanjianshan ophiolite-volcanic arc belt in North Qaidam. The Zhongwunongshan Group was deposited in the back-arc sedimentary basin related to the Caledonian collisional orogeny during Middle Silurian-Early Devonian (434-407.9 Ma).



2020 ◽  
Vol 94 (S1) ◽  
pp. 6-6
Author(s):  
Danling CHEN ◽  
Xiaohui ZHU ◽  
Yunfei REN ◽  
Yu TUO




2019 ◽  
Vol 191 ◽  
pp. 190-211 ◽  
Author(s):  
Shengyao Yu ◽  
Sanzhong Li ◽  
Jianxin Zhang ◽  
Yinbiao Peng ◽  
Ian Somerville ◽  
...  


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