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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
Constraints on the nature of the basement of the Junggar terrane indicated by the Laba Ordovician continental arc

文献类型：期刊论文

作者Wu, Chu1,2,3; Hong, Tao1,3,4; Xu, Xing-Wang1,3,4,5; Li, Hao1,3; Ke, Qiang1,3; Li, Hang1,3; Dong, Lian-Hui1,3,6
刊名INTERNATIONAL GEOLOGY REVIEW
出版日期2019-03-21
页码1-24
关键词Junggar terrane Laba unit basement nature Alashankou area continental arc
ISSN号0020-6814
DOI10.1080/00206814.2019.1590868
英文摘要With the improvement of regional geological research surrounding the Junggar Basin, whether Junggar terrane has a Precambrian basement is becoming one of the most popular topics of study. The Alashankou area, situated in the west of the Laba unit, is a westernmost trailing-shaped part of the Junggar terrane in the Central Asian Orogenic Belt. Precise petrological, geochronological and geochemical constraints of the metamorphic igneous rocks in the Alashankou area provide a better understanding of the tectonic evolution of the Laba unit, and combining these constraints with the previously geochronological and geophysical results is crucial to reevaluate the nature of the basement of the Junggar terrane. In this paper, our diagnostic results reveal that (1) the two-mica plagioclase schist, biotite amphibole plagioclase schist and granitic mylonite were formed in 447.6 Ma, 443.7 Ma and 428.8 Ma, and their protoliths are possible acidic tuff, andesite, and granite (porphyry), respectively; (2) these rocks have geochemical signatures that originated from typical continental arcs, including intermediate-acid calc-alkaline series rocks; the enrichment of enriched in large ion lithophile elements (LILE), Zr, and Hf; the depletion of Ta, Nb, P and Ti; (3) the granitic mylonite has 0.90 Ga-2.58 Ga inherited zircons, low epsilon Hf(t) to 8.11 and old T-DM2 (Hf) age to 2.91 Ga, suggesting the existence of a Precambrian crust or similar materials as their sources. Based on these parameters, we suggest that (1) the metamorphic igneous rocks were formed in an Early Paleozoic continental arc along the west margin of the Junggar terrane, and (2) the Southern and Eastern Junggar Basin possibly has Precambrian basements, whereas the Northern Junggar Basin consists of accretionary complexes. Southward subduction of the Junggar oceanic plate beneath the Laba unit occurred in the Late Ordovician to Middle Silurian, and the regional continental accretion and metamorphism of the Laba unit happened in the Early Devonian. [GRAPHICS] .
WOS关键词ASIAN OROGENIC BELT ; PALEOZOIC TECTONIC EVOLUTION ; DUCTILE COMPRESSIONAL ZONE ; PHANEROZOIC CRUSTAL GROWTH ; EASTERN TIANSHAN MOUNTAINS ; TRACE-ELEMENT COMPOSITION ; UPPER-MANTLE STRUCTURE ; SOUTHERN WEST JUNGGAR ; NW CHINA IMPLICATIONS ; YILI BLOCK INSIGHTS
资助项目Xinjiang Bureau of Geology and Mineral Resources[2011BAB06B03-3] ; National 305 Project[2011BAB06B03-3] ; National 305 Project[2006BAB07B01-03] ; National Natural Science Foundation of China[41390442] ; National Natural Science Foundation of China[41390445] ; National Natural Science Foundation of China[41802093] ; CAS Knowledge Innovation Project of China[kzcx-ew-ly03] ; CAS Knowledge Innovation Project of China[kzcx2-yw-107] ; National Key R&D Program of China[2017YFC0601201] ; National Key R&D Program of China[2018YFC0604002]
WOS研究方向Geology
语种英语
WOS记录号WOS:000463483100001
出版者TAYLOR & FRANCIS INC
资助机构Xinjiang Bureau of Geology and Mineral Resources ; Xinjiang Bureau of Geology and Mineral Resources ; National 305 Project ; National 305 Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS Knowledge Innovation Project of China ; CAS Knowledge Innovation Project of China ; National Key R&D Program of China ; National Key R&D Program of China ; Xinjiang Bureau of Geology and Mineral Resources ; Xinjiang Bureau of Geology and Mineral Resources ; National 305 Project ; National 305 Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS Knowledge Innovation Project of China ; CAS Knowledge Innovation Project of China ; National Key R&D Program of China ; National Key R&D Program of China ; Xinjiang Bureau of Geology and Mineral Resources ; Xinjiang Bureau of Geology and Mineral Resources ; National 305 Project ; National 305 Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS Knowledge Innovation Project of China ; CAS Knowledge Innovation Project of China ; National Key R&D Program of China ; National Key R&D Program of China ; Xinjiang Bureau of Geology and Mineral Resources ; Xinjiang Bureau of Geology and Mineral Resources ; National 305 Project ; National 305 Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS Knowledge Innovation Project of China ; CAS Knowledge Innovation Project of China ; National Key R&D Program of China ; National Key R&D Program of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/91304]  
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Hong, Tao
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Beijing Urban Construct Explorat & Surveying Desi, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China
4.Univ Chinese Acad Sci, Beijing, Peoples R China
5.Chinese Acad Sci, Xinjiang Res Ctr Mineral Resources, Urumqi, Peoples R China
6.Xinjiang Bur Geol & Mineral Resources, Urumqi, Xinjiang, Peoples R China
推荐引用方式
GB/T 7714		 Wu, Chu,Hong, Tao,Xu, Xing-Wang,et al. Constraints on the nature of the basement of the Junggar terrane indicated by the Laba Ordovician continental arc[J]. INTERNATIONAL GEOLOGY REVIEW,2019:1-24.
APA Wu, Chu.,Hong, Tao.,Xu, Xing-Wang.,Li, Hao.,Ke, Qiang.,...&Dong, Lian-Hui.(2019).Constraints on the nature of the basement of the Junggar terrane indicated by the Laba Ordovician continental arc.INTERNATIONAL GEOLOGY REVIEW,1-24.
MLA Wu, Chu,et al."Constraints on the nature of the basement of the Junggar terrane indicated by the Laba Ordovician continental arc".INTERNATIONAL GEOLOGY REVIEW (2019):1-24.

入库方式： OAI收割

来源：地质与地球物理研究所

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