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Detrital zircon ages and Hf isotopes of the early Paleozoic flysch sequence in the Chinese Altai, NW China: New constrains on depositional age, provenance and tectonic evolution

文献类型：期刊论文

作者Long, Xiaoping1; Yuan, Chao1; Sun, Min2; Xiao, Wenjiao3; Zhao, Guochun2; Wang, Yujing1; Cai, Keda2; Xia, Xiaoping2; Xie, Liewen3
刊名TECTONOPHYSICS
出版日期2010-01-05
卷号480期号:1-4页码:213-231
关键词Detrital zircon Hf isotope Provenance Tectonics Accretion complex Altai
ISSN号0040-1951
DOI10.1016/j.tecto.2009.10.013
文献子类Article
英文摘要Subduction-accretion complexes occur widely in the Central Asian Orogenic Belt (CAOB). Due to the scarcity of fossils, the depositional timing of the Habahe flysch sequence of the subduction-accretion complex in the Chinese Altai is poorly constrained, which gave rise to much controversy in understanding the time of the basement and the tectonic evolution of the Chinese Altai. U-Pb dating of detrital zircons from the Habahe sequence in the northwestern Chinese Altai reveals a young zircon population with a mean (206)Pb/(238)U age around 438 Ma which, together with a mean (206)Pb/(238)U age of 411 +/- 5 Ma for the overlying rhyolite of the Dongxileke Formation, brackets the time of deposition of the sequence between early Silurian and early Devonian. The age of the Dongxileke rhyolite also indicates that the overlying Baihaba Formation possibly began to be deposited in the early Devonian, though U-Pb dating of detrital zircons from this formation gave a maximum depositional age of similar to 438 Ma. The youngest detrital zircons and metamorphic grains of the Habahe sequence reveal different provenance to the sequence in the east. The youngest and metamorphic zircon grains, with early Paleozoic, Neoproterozoic and pre-Neoproterozoic populations, suggest a multi-source for the Habahe sequence. The predominantly early Paleozoic zircons, characterized by concentric zoning, high Th/U ratios and euhedral shapes, imply that the sediments of the sequence were mostly derived from a proximal magmatic source. Based on the age patterns of the Neoproterozoic and pre-Neoproterozoic populations, the Tuva-Mongol Massif, along with adjacent island arcs and metamorphic belts, may be an alternative source region for the Habahe sequence. In view of new geochemical and chronological data for granitoids and advancement in the study of regional metamorphism in the Chinese Altai, we suggest a tectonic model of subduction beneath a huge subduction-accretion complex for the evolution of the Chinese Altai in the early Paleozoic. (c) 2009 Elsevier B.V. All rights reserved.
WOS关键词U-PB GEOCHRONOLOGY ; PHANEROZOIC CRUSTAL GROWTH ; PLASMA-MASS SPECTROMETRY ; ASIAN OROGENIC BELT ; SEDIMENTARY-ROCKS ; NORTHWEST CHINA ; LU-HF ; ACCRETIONARY OROGENESIS ; NORTHERN XINJIANG ; SOUTHERN ALASKA
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000274054700016
出版者ELSEVIER SCIENCE BV
资助机构National Basic Research Program of China(2007CB411308) ; National Basic Research Program of China(2007CB411308) ; National Natural Science Foundation of China(40721063 ; National Natural Science Foundation of China(40721063 ; Hong Kong RGC(HKU704307P ; Hong Kong RGC(HKU704307P ; HKU CRCG(200711159058) ; HKU CRCG(200711159058) ; Chinese Academy of Sciences(GIGCX-07-03) ; Chinese Academy of Sciences(GIGCX-07-03) ; CAS/SAFEA ; CAS/SAFEA ; 40772130 ; 40772130 ; 704004P) ; 704004P) ; 40803009) ; 40803009) ; National Basic Research Program of China(2007CB411308) ; National Basic Research Program of China(2007CB411308) ; National Natural Science Foundation of China(40721063 ; National Natural Science Foundation of China(40721063 ; Hong Kong RGC(HKU704307P ; Hong Kong RGC(HKU704307P ; HKU CRCG(200711159058) ; HKU CRCG(200711159058) ; Chinese Academy of Sciences(GIGCX-07-03) ; Chinese Academy of Sciences(GIGCX-07-03) ; CAS/SAFEA ; CAS/SAFEA ; 40772130 ; 40772130 ; 704004P) ; 704004P) ; 40803009) ; 40803009) ; National Basic Research Program of China(2007CB411308) ; National Basic Research Program of China(2007CB411308) ; National Natural Science Foundation of China(40721063 ; National Natural Science Foundation of China(40721063 ; Hong Kong RGC(HKU704307P ; Hong Kong RGC(HKU704307P ; HKU CRCG(200711159058) ; HKU CRCG(200711159058) ; Chinese Academy of Sciences(GIGCX-07-03) ; Chinese Academy of Sciences(GIGCX-07-03) ; CAS/SAFEA ; CAS/SAFEA ; 40772130 ; 40772130 ; 704004P) ; 704004P) ; 40803009) ; 40803009) ; National Basic Research Program of China(2007CB411308) ; National Basic Research Program of China(2007CB411308) ; National Natural Science Foundation of China(40721063 ; National Natural Science Foundation of China(40721063 ; Hong Kong RGC(HKU704307P ; Hong Kong RGC(HKU704307P ; HKU CRCG(200711159058) ; HKU CRCG(200711159058) ; Chinese Academy of Sciences(GIGCX-07-03) ; Chinese Academy of Sciences(GIGCX-07-03) ; CAS/SAFEA ; CAS/SAFEA ; 40772130 ; 40772130 ; 704004P) ; 704004P) ; 40803009) ; 40803009)
源URL[http://ir.iggcas.ac.cn/handle/132A11/72087]  
专题中国科学院地质与地球物理研究所
通讯作者Yuan, Chao
作者单位1.Chinese Acad Sci, Key Lab Isotope Geochronol & Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China
2.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China
3.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		 Long, Xiaoping,Yuan, Chao,Sun, Min,et al. Detrital zircon ages and Hf isotopes of the early Paleozoic flysch sequence in the Chinese Altai, NW China: New constrains on depositional age, provenance and tectonic evolution[J]. TECTONOPHYSICS,2010,480(1-4):213-231.
APA Long, Xiaoping.,Yuan, Chao.,Sun, Min.,Xiao, Wenjiao.,Zhao, Guochun.,...&Xie, Liewen.(2010).Detrital zircon ages and Hf isotopes of the early Paleozoic flysch sequence in the Chinese Altai, NW China: New constrains on depositional age, provenance and tectonic evolution.TECTONOPHYSICS,480(1-4),213-231.
MLA Long, Xiaoping,et al."Detrital zircon ages and Hf isotopes of the early Paleozoic flysch sequence in the Chinese Altai, NW China: New constrains on depositional age, provenance and tectonic evolution".TECTONOPHYSICS 480.1-4(2010):213-231.

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来源：地质与地球物理研究所

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