Identification of the Late Devonian back-arc magmatism in the Chinese Eastern Tianshan
文献类型：期刊论文
| 作者 | Du, Long2,5; Long, Xiaoping2; Yuan, Chao3; Zhang, Yunying1; Huang, Zongying3; Zhu, Hongli4 |
| 刊名 | LITHOS
 |
| 出版日期 | 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 |
| 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. |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:001045762200001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74628]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Du, Long |
| 作者单位 | 1.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 2.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 4.Chinese Acad Sci, Inst Oceanog, Ctr Deep Sea Res, Qingdao 266071, 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. |
入库方式： OAI收割
来源：广州地球化学研究所
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