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  2. 地质与地球物理研究所
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  4. 中国科学院矿产资源研究重点实验室
The tectonic evolution of the Irtysh tectonic belt: New zircon U-Pb ages of arc-related and collisional granitoids in the Kalaxiangar tectonic belt, NW China

文献类型：期刊论文

作者Hong, Tao1,2,3; Klemd, Reiner3; Gao, Jun1,2; Xiang, Peng4; Xu, Xing-Wang1,2; You, Jun1,2; Wang, Xin-Shui1,2; Wu, Chu4,5; Li, Hao1,2; Ke, Qiang1,2
刊名LITHOS
出版日期2017-02-01
卷号272页码:46-68
关键词Zircon U-pb Age Arc-related And Collisional Granitoids Tectonic Evolution Irtysh Tectonic Belt
ISSN号0024-4937
DOI10.1016/j.lithos.2016.12.001
文献子类Article
英文摘要Precise geochronological constraints of the Irtysh tectonic belt situated between the Saur Island Arc and the Altay Terrane are crucial to a better understanding of the tectonic evolution of the Central Asian Orogenic Belt (CAOB). Recently, we discovered repeatedly deformed arc-related and collisional granitoids in the Kalaxiangar tectonic belt (KTB), which is located in the eastern part of the Irtysh tectonic belt. In this study, we report new whole rock geochemical, zircon U-Pb and Hf isotopic data of the arc-related and collisional granitoids. Our data reveal that 1) arc-related granodioritic porphyries formed at ca. 382-374 Ma. Recrystallized zircon grains from a (ultra)mylonitic granodiorite of the Laoshankou zone in the southern KTB display a U-Pb age of ca. 360 Ma; 2) syncollisional granodioritic porphyries, which distribute along faults and parallel to the cleavage, were emplaced at ca. 367-356 Ma; with epsilon(HF)(t) values varying from + 7.8 to +14.2 and Hf model ages from 873 to 459 Ma; 3) a post-collisional A-type granodioritic porphyry, which crosscuts the NW-NNW trending schistosity of the metasedimentary country rocks at a low angle, has an age of ca. 324-320 Ma, while the epsilon(HF)(t) values range from + 7.6 to + 14.4 with Hf model ages from 850 to 416 Ma; 4) post-collisional strike-slip A-type granite dykes, exposed along strike -slip faults, gave ages between 287 and 279 Ma, whereas the epsilon(HF)(t) values range from +4.9 to + 12.7 and the Hf model ages from 995 to 500 Ma; and 5) A-type biotite granite dykes, which intruded along conjugate tension joints, have ages of 274-271 Ma, and EHR0 values from +1.5 to + 13.2 with Hf model ages from 1196 to 454 Ma. Consequently, we propose that the collision between the Saur Island Arc and the Altay Terrane occurred in the Early Carboniferous (ca. 367-356 Ma) and the subsequent post-collisional tectonic process continued to the Late Carboniferous (ca. 324-320 Ma). It is further suggested that the Irtysh tectonic belt underwent large-scale strike-slip deformation during the mid-Permian between 287 and 279 Ma. The termination of the Irtysh tectonic belt orogeny is thought to have also occurred during the mid-Permian between 274 and 271 Ma. (C) 2016 Elsevier B.V. All rights reserved.
WOS关键词ASIAN OROGENIC BELT ; TRACE-ELEMENT COMPOSITION ; I-TYPE GRANITOIDS ; A-TYPE GRANITES ; EAST JUNGGAR ; LU-HF ; SOUTHERN MARGIN ; ALTAI OROGEN ; GEOCHEMICAL CHARACTERISTICS ; GEOLOGICAL SIGNIFICANCE
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000393265600004
出版者ELSEVIER SCIENCE BV
资助机构National Natural Science Foundation of China(41390442 ; CAS Knowledge Innovation Project(kzcx-ew-ly03 ; National 305 Project(2011BAB06B03-3 ; 41390445) ; kzcx2-yw-107) ; 2006BAB07B01-03) ; National Natural Science Foundation of China(41390442 ; CAS Knowledge Innovation Project(kzcx-ew-ly03 ; National 305 Project(2011BAB06B03-3 ; 41390445) ; kzcx2-yw-107) ; 2006BAB07B01-03) ; National Natural Science Foundation of China(41390442 ; CAS Knowledge Innovation Project(kzcx-ew-ly03 ; National 305 Project(2011BAB06B03-3 ; 41390445) ; kzcx2-yw-107) ; 2006BAB07B01-03) ; National Natural Science Foundation of China(41390442 ; CAS Knowledge Innovation Project(kzcx-ew-ly03 ; National 305 Project(2011BAB06B03-3 ; 41390445) ; kzcx2-yw-107) ; 2006BAB07B01-03)
源URL[http://ir.iggcas.ac.cn/handle/132A11/53115]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者Gao, Jun
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, POB 9825, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Erlangen Nurnberg, GeoZentrum Nordbayern, Schlossgarten 5a, D-91054 Erlangen, Germany
4.China Univ Geosci, Sch Geosci & Resources, Beijing 100083, Peoples R China
5.China Univ Geosci, Sci Res Inst, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714		 Hong, Tao,Klemd, Reiner,Gao, Jun,et al. The tectonic evolution of the Irtysh tectonic belt: New zircon U-Pb ages of arc-related and collisional granitoids in the Kalaxiangar tectonic belt, NW China[J]. LITHOS,2017,272:46-68.
APA Hong, Tao.,Klemd, Reiner.,Gao, Jun.,Xiang, Peng.,Xu, Xing-Wang.,...&Ke, Qiang.(2017).The tectonic evolution of the Irtysh tectonic belt: New zircon U-Pb ages of arc-related and collisional granitoids in the Kalaxiangar tectonic belt, NW China.LITHOS,272,46-68.
MLA Hong, Tao,et al."The tectonic evolution of the Irtysh tectonic belt: New zircon U-Pb ages of arc-related and collisional granitoids in the Kalaxiangar tectonic belt, NW China".LITHOS 272(2017):46-68.

入库方式： OAI收割

来源：地质与地球物理研究所

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