中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Multiple Early Paleozoic granitoids from the southeastern Qilian orogen, NW China: Magma responses to slab roll-back and break-off

文献类型:期刊论文

作者Yang, He1,3,4,5; Zhang, Hongfei1,4; Xiao, Wenjiao2,3,5; Tao, Lu1,4; Gao, Zhong1,4; Luo, Biji1,4; Zhang, Liqi1,4
刊名LITHOS
出版日期2021
卷号380页码:20
ISSN号0024-4937
关键词Granitoid Petrogenesis Slab roll-back Slab break-off Qilian orogen
DOI10.1016/j.lithos.2020.105910
英文摘要The slab dynamic processes, such as roll-back during oceanic subduction and break-off during collision orogenesis, would affect the movement of mantle material and the interaction between crust and mantle, accompanied by significant amounts of magmatism. Providing accurate depictions for these processes are extremely difficult, especially in the case of ancient orogens. Here, we present an integrated study of petrology, geochronology, geochemistry and Sr-Nd-Hf isotopes for Early Paleozoic granitoids from the Duojielaka, Ledu and Binglingsi plutons of the southeastern Qilian orogen. Our LA-ICP-MS U-Pb zircon data show that these granitoids were emplaced at 476-432 Ma. The petrological and geochemical data suggest that the similar to 476 Ma Duojielaka porphyritic syenogranites formed by feldspar-dominated fractionation from relatively K-rich basaltic rock-derived adakitic parental magma. The similar to 454 Ma Duojielaka biotite monzogranites are highly fractionated I-type granites and were derived from basement orthogneisses mixed with minor mafic rocks. The Ledu fine- and medium-grained quartz diorites (similar to 446 and similar to 452 Ma) are high-K calc-alkaline to shoshonitic and were produced by partial melting of relatively old K-rich mafic crust followed by minor mixing with mantle-derived magmas. The similar to 432 Ma Binglingsi biotite monzogranites with adakitic characteristics most likely originated by partial melting of thickened mafic lower crust. Based on the new data, in combination with previously published data, we suggest that the roll-back of the South Qilian oceanic slab occurred during the Middle Cambrian to early Middle Ordovician. The Duojielaka porphyritic syenogranites represented crustal anatexis in an arc front associated with slab roll-back. The Late Ordovician-early Middle Silurian intrusive rocks probably resulted from diachronous slab break-off in the post-collisional stage. The rocks record the opening of the break-off window from east to west and the gradual heat propagation from the central part to the southern and northern margins of the eastern Central Qilian due to the widening of break-off window and asthenospheric upwelling. We propose that complex geodynamic processes and their thermal effects can be traced by a comprehensive consideration of the petrogenetic, temporal and spatial evolution of related magmatism. (C) 2020 Elsevier B.V. All rights reserved.
WOS关键词I-TYPE GRANITES ; U-PB AGE ; LASER-ABLATION QUADRUPOLE ; NORTH QAIDAM OROGEN ; MG ADAKITIC ROCKS ; A-TYPE GRANITES ; INTRUSIVE ROCKS ; CALC-ALKALINE ; VOLCANIC-ROCKS ; GEOCHEMICAL CHARACTERISTICS
资助项目National Natural Science Foundation of China[41703041] ; National Natural Science Foundation of China[41573021] ; National Natural Science Foundation of China[41888101] ; CAS 'Light ofWest China' Program[2016-QNXZ-B-19] ; National Key R&D Program of China[2017YFC0601206] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-SYS012] ; China Postdoctoral Science Foundation[2017M613262]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
出版者ELSEVIER
WOS记录号WOS:000612252700008
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS 'Light ofWest China' Program ; CAS 'Light ofWest China' Program ; National Key R&D Program of China ; National Key R&D Program of China ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS 'Light ofWest China' Program ; CAS 'Light ofWest China' Program ; National Key R&D Program of China ; National Key R&D Program of China ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS 'Light ofWest China' Program ; CAS 'Light ofWest China' Program ; National Key R&D Program of China ; National Key R&D Program of China ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS 'Light ofWest China' Program ; CAS 'Light ofWest China' Program ; National Key R&D Program of China ; National Key R&D Program of China ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
源URL[http://ir.iggcas.ac.cn/handle/132A11/100113]  
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Yang, He
作者单位1.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Slate Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.China Univ Geosci, Sch Earth Sci, Wuhan 430074, Peoples R China
5.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Res Ctr Mineral Resources, Urumqi 830011, Peoples R China
推荐引用方式
GB/T 7714
Yang, He,Zhang, Hongfei,Xiao, Wenjiao,et al. Multiple Early Paleozoic granitoids from the southeastern Qilian orogen, NW China: Magma responses to slab roll-back and break-off[J]. LITHOS,2021,380:20.
APA Yang, He.,Zhang, Hongfei.,Xiao, Wenjiao.,Tao, Lu.,Gao, Zhong.,...&Zhang, Liqi.(2021).Multiple Early Paleozoic granitoids from the southeastern Qilian orogen, NW China: Magma responses to slab roll-back and break-off.LITHOS,380,20.
MLA Yang, He,et al."Multiple Early Paleozoic granitoids from the southeastern Qilian orogen, NW China: Magma responses to slab roll-back and break-off".LITHOS 380(2021):20.

入库方式: OAI收割

来源:地质与地球物理研究所

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