Knowledge Management System Of Guangzhou Institute of Geochemistry,CAS
Du, Long1,2; Long, Xiaoping2; Yuan, Chao3; Zhang, Yunying4; Huang, Zongying3; Zhu, Hongli5 | |
Identification of the Late Devonian back-arc magmatism in the Chinese Eastern Tianshan | |
Source Publication | LITHOS |
ISSN | 0024-4937 |
2023-10-01 | |
Volume | 454Pages:14 |
DOI | 10.1016/j.lithos.2023.107283 |
Language | 英语 |
WOS Research Area | Geochemistry & Geophysics ; Mineralogy |
Abstract | 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. |
Keyword | Accretionary orogen Eastern Tianshan Back-arc High -Al gabbro A-type granite |
WOS ID | WOS:001045762200001 |
Indexed By | SCI |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.gig.ac.cn/handle/344008/74629 |
Collection | 同位素地球化学国家重点实验室 |
Corresponding Author | Du, Long |
Affiliation | 1.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Res Ctr Continental Dynam, Qingdao 266590, 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, South China Sea Inst Oceanol, Innovat Acad South China Sea Ecol & Environm Engn, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Peoples R China 5.Chinese Acad Sci, Inst Oceanog, Ctr Deep Sea Res, Qingdao 266071, Peoples R China |
Recommended Citation 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. |
Files in This Item: | There are no files associated with this item. |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment