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EARLY CARBONIFEROUS RIFTING OF THE HARLIK ARC IN THE EASTERN TIANSHAN (NW CHINA): RESPONSE TO ROLLBACK IN THE SOUTHERN ALTAIDS?

文献类型：期刊论文

作者Li, Liang1,4; Xia, Wenjiao1,3,4,5; Windley, Brian F.2; Yang, He4; Jia, Xiaoliang4; Sang, Miao4; Abuduxun, Nijiati1,4; Liu, Yin4
刊名AMERICAN JOURNAL OF SCIENCE
出版日期2022-02-01
卷号322期号:2页码:313-350
关键词Eastern Tianshan Early Carboniferous Slab rollback Rifting Peraluminous granitoids
ISSN号0002-9599
DOI10.2475/02.2022.07
英文摘要Field, geochronological, geochemical and Sr-Nd isotopic analyses are applied to late Paleozoic gabbro-diorites and monzogranites in the Hulugou-Miaoergou regions, Harlik arc, in order to provide constraints on the tectonic evolution of the Eastern Tianshan orogen in the late Paleozoic. LA-ICP-MS zircon U-Pb ages show that the first pulse of gabbroic magmatism occurred at 348 +/- 4 Ma, accompanied by simultaneous dioritic (342 +/- 3 Ma) and monzogranitic (343 +/- 5 Ma) magmatism, and the second pulse of gabbroic magmatism was at 334 +/- 3 Ma. Most of the gabbros are medium- to high- K calc-alkaline in composition, and show enrichments in light rare earth elements (LREE) and large ion lithophile elements (LILE), but depletions in high field strength elements (HFSE, especially Nb and Ta). In combination with their juvenile isotopic signature (initial Sr-87/Sr-86 = 0.70345-0.70380, epsilon Nd(t) = 4.5-6), the geochemical features suggest that both pulses of gabbroic magmatism were likely derived from partial melting of asthenosphere facilitated by a flux from a subducting slab. The diorites also display the arc-related geochemical characteristics and juvenile isotopic signature (initial Sr-87/Sr-86 = 0.70355-0.70358, epsilon Nd(t) = 4.3-4.7), coupled with their intimate relationship with the gabbros indicate that they formed by fractional crystallization of clinopyroxene, plagioclase and amphibole from the first pulse of gabbroic magmatism. The monzogranites have relatively high A/CNK values (1.04-1.1) and are weakly to moderately peraluminous. Considering the presence of zircon xenocrysts dated at 510 to 450 Ma in the monzogranites, and their moderate molar Al2O3/(MgO+FeOT) and molar CaO/(MgO+FeOT) ratios, partial melting of supracrustal rocks of probable late Ordovician age was most likely the cause of their genesis and heterogeneity. These three different magmas (gabbroic, dioritic and monzogranitic) were probably extracted from a deep crustal hot zone. The primitive basaltic magmas continuously intruded the deep crust where they solidified, fractionated, assimilated, and heated the crust, generating in turn the peraluminous and A-type granitoids, similar to the magmas in the Lachlan orogen that intruded during progressive slab rollback. Based on all available evidence, we propose that southward slab rollback of the subducting Paleo-Asian Ocean in the early Carboniferous was responsible for the progressive emplacement of these different magmas, which eventually resulted in rifting of the Harlik arc.
WOS关键词U-PB GEOCHRONOLOGY ; BIMODAL VOLCANIC-ROCKS ; A-TYPE GRANITES ; CONTINENTAL GROWTH ; OROGENIC BELT ; CENTRAL-ASIA ; PALEOZOIC EVOLUTION ; TECTONIC FRAMEWORK ; CRUSTAL EVOLUTION ; PERITECTIC GARNET
资助项目National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41822204] ; National Key R&D Program of China[2017YFC0601206] ; "Light of West China" Program of the Chinese Academy of Sciences (CAS)[2017-XBQNXZ-B-013] ; "Light of West China" Program of the Chinese Academy of Sciences (CAS)[2018-XBYJRC-003] ; Strategic Priority Research Program (B) of the CAS[XDB18020203] ; Program of China-Pakistan Joint Research Center on Earth Sciences[131551KYSB20200021]
WOS研究方向Geology
语种英语
WOS记录号WOS:000800692700001
出版者AMER JOURNAL SCIENCE
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; "Light of West China" Program of the Chinese Academy of Sciences (CAS) ; "Light of West China" Program of the Chinese Academy of Sciences (CAS) ; "Light of West China" Program of the Chinese Academy of Sciences (CAS) ; "Light of West China" Program of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the CAS ; Strategic Priority Research Program (B) of the CAS ; Strategic Priority Research Program (B) of the CAS ; Strategic Priority Research Program (B) of the CAS ; Program of China-Pakistan Joint Research Center on Earth Sciences ; Program of China-Pakistan Joint Research Center on Earth Sciences ; Program of China-Pakistan Joint Research Center on Earth Sciences ; Program of China-Pakistan Joint Research Center on Earth Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; "Light of West China" Program of the Chinese Academy of Sciences (CAS) ; "Light of West China" Program of the Chinese Academy of Sciences (CAS) ; "Light of West China" Program of the Chinese Academy of Sciences (CAS) ; "Light of West China" Program of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the CAS ; Strategic Priority Research Program (B) of the CAS ; Strategic Priority Research Program (B) of the CAS ; Strategic Priority Research Program (B) of the CAS ; Program of China-Pakistan Joint Research Center on Earth Sciences ; Program of China-Pakistan Joint Research Center on Earth Sciences ; Program of China-Pakistan Joint Research Center on Earth Sciences ; Program of China-Pakistan Joint Research Center on Earth Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; "Light of West China" Program of the Chinese Academy of Sciences (CAS) ; "Light of West China" Program of the Chinese Academy of Sciences (CAS) ; "Light of West China" Program of the Chinese Academy of Sciences (CAS) ; "Light of West China" Program of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the CAS ; Strategic Priority Research Program (B) of the CAS ; Strategic Priority Research Program (B) of the CAS ; Strategic Priority Research Program (B) of the CAS ; Program of China-Pakistan Joint Research Center on Earth Sciences ; Program of China-Pakistan Joint Research Center on Earth Sciences ; Program of China-Pakistan Joint Research Center on Earth Sciences ; Program of China-Pakistan Joint Research Center on Earth Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; "Light of West China" Program of the Chinese Academy of Sciences (CAS) ; "Light of West China" Program of the Chinese Academy of Sciences (CAS) ; "Light of West China" Program of the Chinese Academy of Sciences (CAS) ; "Light of West China" Program of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the CAS ; Strategic Priority Research Program (B) of the CAS ; Strategic Priority Research Program (B) of the CAS ; Strategic Priority Research Program (B) of the CAS ; Program of China-Pakistan Joint Research Center on Earth Sciences ; Program of China-Pakistan Joint Research Center on Earth Sciences ; Program of China-Pakistan Joint Research Center on Earth Sciences ; Program of China-Pakistan Joint Research Center on Earth Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/106027]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Xia, Wenjiao
作者单位1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
2.Univ Leicester, Dept Geol, Leicester LE1 7RH, Leics, England
3.Chinese Acad Sci, China Pakistan Joint Res Ctr Earth Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Xinjiang Res Ctr Mineral Resources, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Li, Liang,Xia, Wenjiao,Windley, Brian F.,et al. EARLY CARBONIFEROUS RIFTING OF THE HARLIK ARC IN THE EASTERN TIANSHAN (NW CHINA): RESPONSE TO ROLLBACK IN THE SOUTHERN ALTAIDS?[J]. AMERICAN JOURNAL OF SCIENCE,2022,322(2):313-350.
APA Li, Liang.,Xia, Wenjiao.,Windley, Brian F..,Yang, He.,Jia, Xiaoliang.,...&Liu, Yin.(2022).EARLY CARBONIFEROUS RIFTING OF THE HARLIK ARC IN THE EASTERN TIANSHAN (NW CHINA): RESPONSE TO ROLLBACK IN THE SOUTHERN ALTAIDS?.AMERICAN JOURNAL OF SCIENCE,322(2),313-350.
MLA Li, Liang,et al."EARLY CARBONIFEROUS RIFTING OF THE HARLIK ARC IN THE EASTERN TIANSHAN (NW CHINA): RESPONSE TO ROLLBACK IN THE SOUTHERN ALTAIDS?".AMERICAN JOURNAL OF SCIENCE 322.2(2022):313-350.

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来源：地质与地球物理研究所

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