Identification of the Late Devonian back-arc magmatism in the Chinese Eastern Tianshan | |
Du, Long4,5; Long, Xiaoping4; Yuan, Chao1; Zhang, Yunying2; Huang, Zongying1; Zhu, Hongli3 | |
刊名 | LITHOS |
2023-10-01 | |
卷号 | 454页码:14 |
关键词 | Accretionary orogen Eastern Tianshan Back-arc High -Al gabbro A-type granite |
ISSN号 | 0024-4937 |
DOI | 10.1016/j.lithos.2023.107283 |
通讯作者 | Du, Long(dulong@sdust.edu.cn) |
英文摘要 | Identifcation of subduction to back-arc tectonic transitions is critical to the study of accretionary orogens. Some new geochronological and geochemical data for the Late Devonian (380-361 Ma) Kezier mafic-felsic complex and Tuwu granitic pluton in this study have well recorded such transition feature in the Chinese Eastern Tianshan orogen. The Kezier gabbro is classified as high-Al basalt given their high Al contents (A12O3 > 17 wt%). They were originated from a depleted mantle fluxed by fertile mantle components at shallow depths under hydrous condition. Both the Kezier and Tuwu granites show geochemical characteristics of high total alkali, Ga/Al, HFSE, low CaO, and strongly negative Ba, Sr, and Eu anomalies, demonstrating a close affinity with A-type granites. The granites were probably generated by high temperature melting (zircon saturation temperature up to 916 degrees C) of crustal rocks under a low-pressure (<0.8-1.0 GPa) condition. These rocks can help identify the Late Devonian back-arc extensional event in the Eastern Tianshan. This extensional event contemporaneous with the onset of the earliest arc magmatic records southward rejuvenating. The back-arc extensional with crustal high-temperature melting event can be reconciled with the Kangguer Ocean rollback, which forced the arc rifting occur on the Dananhu fore-arc side during the Late Devonian. |
资助项目 | National Key Research and Development Project[2019YFA0708601] ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University[22LCD07] ; National Natural Science Foundation of China[U1906207] ; National Natural Science Foundation of China[41903031] |
WOS关键词 | U-PB GEOCHRONOLOGY ; A-TYPE GRANITOIDS ; NW CHINA ; PALEOZOIC MAGMATISM ; CONTINENTAL GROWTH ; TECTONIC EVOLUTION ; BIMODAL MAGMATISM ; VOLCANIC BELT ; HF ISOTOPES ; LOW-MGO |
WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
语种 | 英语 |
出版者 | ELSEVIER |
WOS记录号 | WOS:001045762200001 |
内容类型 | 期刊论文 |
源URL | [http://ir.qdio.ac.cn/handle/337002/182720] |
专题 | 海洋研究所_深海极端环境与生命过程研究中心 |
通讯作者 | Du, Long |
作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, South China Sea Inst Oceanol, Innovat Acad South China Sea Ecol & Environm Engn, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Peoples R China 3.Chinese Acad Sci, Inst Oceanog, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 4.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China 5.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Res Ctr Continental Dynam, Qingdao 266590, Peoples R China |
推荐引用方式 GB/T 7714 | Du, Long,Long, Xiaoping,Yuan, Chao,et al. Identification of the Late Devonian back-arc magmatism in the Chinese Eastern Tianshan[J]. LITHOS,2023,454:14. |
APA | Du, Long,Long, Xiaoping,Yuan, Chao,Zhang, Yunying,Huang, Zongying,&Zhu, Hongli.(2023).Identification of the Late Devonian back-arc magmatism in the Chinese Eastern Tianshan.LITHOS,454,14. |
MLA | Du, Long,et al."Identification of the Late Devonian back-arc magmatism in the Chinese Eastern Tianshan".LITHOS 454(2023):14. |
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