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Geochronological and geochemical constraints for a middle Paleozoic continental arc on the northern margin of the Tarim block: Implications for the Paleozoic tectonic evolution of the South Chinese Tianshan

文献类型：期刊论文

作者Lin, Wei1; Chu, Yang1; Ji, Wenbin1,2; Zhang, Zhongpei3; Shi, Yonghong4; Wang, Zhenyuan1,3; Li, Zhong1; Wang, Qingchen1
刊名LITHOSPHERE
出版日期2013-08-01
卷号5期号:4页码:355-381
ISSN号1941-8264
DOI10.1130/L231.1
文献子类Article
英文摘要In order to reveal the tectonic evolution of the South Chinese Tianshan orogenic belt, we conducted structural, geochemical, and geochronological studies and identified granitic and volcanic rocks along the northern margin of the Tarim block. Zircon laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) U-Pb dating of two samples from granitic plutons yielded crystallization ages from 404.8 +/- 2.0 Ma to 388.1 +/- 2.2 Ma, and two samples of dacite and rhyolite yielded ages of volcanism at ca. 404 Ma, highlighting a middle Paleozoic igneous event. Geochemical data suggest that these Devonian igneous rocks are metaluminous, high-K calc-alkaline felsic volcanic and plutonic rocks. All the samples display relatively enriched light rare earth element (LREE) contents, weak or no negative Eu anomalies, and relative depletion in Nb, Ta, Ti, and P, but they show enrichment in K, Rb, and Ba. In situ zircon Hf isotopic results show a positive range of epsilon(Hf) (t). These geochemical and isotopic features suggest that this magmatic event probably occurred in an Andean-type arc. Combined with zircon U-Pb and Hf isotopic studies on the basement rocks, the results indicate multiphase Precambrian (ca. 2600-2300 Ma, 1900-1800 Ma, 1140-830 Ma) continental growth and minor involvement of basement in Devonian arc magmatism. Finally, we integrated the structural, geochemical, and geochronological data into a geodynamic model of the South Chinese Tianshan that emphasizes south-directed subduction of the South Tianshan Ocean along the northern margin of the Tarim block during the early to middle Paleozoic.
WOS关键词PB ZIRCON GEOCHRONOLOGY ; ASIAN OROGENIC BELT ; NW CHINA ; TIEN-SHAN ; NORTHWESTERN CHINA ; MESOPROTEROZOIC SUPERCONTINENT ; PRECAMBRIAN EVOLUTION ; COLLISIONAL TECTONICS ; METAMORPHIC BELT ; CRUSTAL GROWTH
WOS研究方向Geochemistry & Geophysics ; Geology
语种英语
WOS记录号WOS:000322548100003
出版者GEOLOGICAL SOC AMER, INC
资助机构Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Major State Project of Special Research(2011ZX05008-001) ; Major State Project of Special Research(2011ZX05008-001) ; Major State Project of Special Research(2011ZX05008-001) ; Major State Project of Special Research(2011ZX05008-001) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Major State Project of Special Research(2011ZX05008-001) ; Major State Project of Special Research(2011ZX05008-001) ; Major State Project of Special Research(2011ZX05008-001) ; Major State Project of Special Research(2011ZX05008-001) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Major State Project of Special Research(2011ZX05008-001) ; Major State Project of Special Research(2011ZX05008-001) ; Major State Project of Special Research(2011ZX05008-001) ; Major State Project of Special Research(2011ZX05008-001) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Chinese National 973 Project(2009CB825008) ; Major State Project of Special Research(2011ZX05008-001) ; Major State Project of Special Research(2011ZX05008-001) ; Major State Project of Special Research(2011ZX05008-001) ; Major State Project of Special Research(2011ZX05008-001)
源URL[http://ir.iggcas.ac.cn/handle/132A11/86786]  
专题中国科学院地质与地球物理研究所
通讯作者Lin, Wei
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Explorat & Prod Res Inst, Beijing 100083, Peoples R China
4.Hefei Univ Technol, Dept Geol, Sch Resource & Environm Engn, Hefei 230009, Anhui, Peoples R China
推荐引用方式
GB/T 7714		 Lin, Wei,Chu, Yang,Ji, Wenbin,et al. Geochronological and geochemical constraints for a middle Paleozoic continental arc on the northern margin of the Tarim block: Implications for the Paleozoic tectonic evolution of the South Chinese Tianshan[J]. LITHOSPHERE,2013,5(4):355-381.
APA Lin, Wei.,Chu, Yang.,Ji, Wenbin.,Zhang, Zhongpei.,Shi, Yonghong.,...&Wang, Qingchen.(2013).Geochronological and geochemical constraints for a middle Paleozoic continental arc on the northern margin of the Tarim block: Implications for the Paleozoic tectonic evolution of the South Chinese Tianshan.LITHOSPHERE,5(4),355-381.
MLA Lin, Wei,et al."Geochronological and geochemical constraints for a middle Paleozoic continental arc on the northern margin of the Tarim block: Implications for the Paleozoic tectonic evolution of the South Chinese Tianshan".LITHOSPHERE 5.4(2013):355-381.

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