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Provenance of Early Paleozoic metasediments in the central Chinese Altai: Implications for tectonic affinity of the Altai-Mongolia terrane in the Central Asian Orogenic Belt

文献类型：期刊论文

作者Wang, Yujing1,2; Long, Xiaoping1; Wilde, Simon A.3; Xu, Huilong2; Sun, Min4; Xiao, Wenjiao5; Yuan, Chao1; Cai, Keda6
刊名LITHOS
出版日期2014-12-01
卷号210页码:57-68
ISSN号0024-4937
关键词Provenance Detrital zircons Microcontinent Tectonic evolution Central Asian Orogenic Belt
DOI10.1016/j.lithos.2014.09.026
文献子类Article
英文摘要The Chinese Altai is one of the most typical segments of the Altai-Mongolia terrane, of which the tectonic evolution and affinity are hotly disputed and still not well constrained. Early Paleozoic metasedimentary rocks are extensive in the Altai-Mongolia terrane and their provenance is a key to unravelling the tectonic history of this terrane. Metasediments from Kulumuti Group were collected from the central Chinese Altai for geochemical study. They have low Chemical Index of Alteration (CIA = 52-54) and high Index of Compositional Variability (ICV = 0.81-1.19) values, different from the mature post-Archean Australian average shale (PAAS), indicating relatively weak chemical weathering and a source compositionally dominated by immature material that lacks alumina-rich minerals. These rocks are moderately enriched in light rare earth element (LREE) and show relatively flat heavy rare earth element (HREE) patterns (La-N/Yb-N = 2.36-9.80, Gd-N/Yb-N = 131-2.45). Compared with PAAS, they mostly have lower large ion lithophile element concentrations (e.g. Rb, Sr, Ba, Th, U and Pb) and similar contents of high field strength elements (e.g. Zr, Hf and Y), but with lower Nb and Ta. The metasediments have high Rb concentrations (>50 ppm), relatively high K2O(20 (>1.1 wt.%) and low REE contents with negative Eu/Eu* anomalies, indicating that these rocks were derived from an acid-intermediate igneous source. The rocks have slightly enriched Nd isotopic compositions with calculated initial epsilon(Nd)(t) values mostly ranging from -4.3 to -0.2 and T-DM(2) model ages between 1.22 and 1.56 Ga. Detrital zircons from two samples of the Kulumuti metasediments have similar age spectra, dominated by Early Paleozoic to latest Neoproterozoic zircons (465-576 Ma) with a few older grains formed between 766-972 Ma and 1321-2572 Ma, remarkably consistent with those from the low-grade metamorphic Habahe Group in the western Chinese Altai. In combination with previous published data, the detrital zircons from Early Paleozoic metasediments in the Chinese Altai dominantly formed between 430-580 and 750-950 Ma, with only a minor population of Meso-to Paleoproterozoic grains. When compared with adjacent terranes, the age spectrum of the Chinese Altai is most similar to that of the Tarim Craton. This craton provided Precambrian materials for the Early Paleozoic metasedimentary rocks now exposed in the Chinese Altai, and therefore suggests that the whole Altai-Mongolia terrane has a close tectonic affinity to the Tarim Craton.
WOS关键词U-PB ZIRCON ; PHANEROZOIC CRUSTAL GROWTH ; HF ISOTOPIC CONSTRAINTS ; DRONNING MAUD LAND ; DETRITAL ZIRCON ; SEDIMENTARY-ROCKS ; NW CHINA ; NORTH CHINA ; CONTINENTAL-CRUST ; EAST ANTARCTICA
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000347507600005
资助机构National Basic Research Program of China(2014CB440801 ; National Basic Research Program of China(2014CB440801 ; National Natural Science Foundation of China(41173005 ; National Natural Science Foundation of China(41173005 ; 2014CB448000) ; 2014CB448000) ; 41273012 ; 41273012 ; 41273048 ; 41273048 ; 41230207 ; 41230207 ; 41390441 ; 41390441 ; 41190075) ; 41190075) ; National Basic Research Program of China(2014CB440801 ; National Basic Research Program of China(2014CB440801 ; National Natural Science Foundation of China(41173005 ; National Natural Science Foundation of China(41173005 ; 2014CB448000) ; 2014CB448000) ; 41273012 ; 41273012 ; 41273048 ; 41273048 ; 41230207 ; 41230207 ; 41390441 ; 41390441 ; 41190075) ; 41190075) ; National Basic Research Program of China(2014CB440801 ; National Basic Research Program of China(2014CB440801 ; National Natural Science Foundation of China(41173005 ; National Natural Science Foundation of China(41173005 ; 2014CB448000) ; 2014CB448000) ; 41273012 ; 41273012 ; 41273048 ; 41273048 ; 41230207 ; 41230207 ; 41390441 ; 41390441 ; 41190075) ; 41190075) ; National Basic Research Program of China(2014CB440801 ; National Basic Research Program of China(2014CB440801 ; National Natural Science Foundation of China(41173005 ; National Natural Science Foundation of China(41173005 ; 2014CB448000) ; 2014CB448000) ; 41273012 ; 41273012 ; 41273048 ; 41273048 ; 41230207 ; 41230207 ; 41390441 ; 41390441 ; 41190075) ; 41190075)
源URL[http://ir.iggcas.ac.cn/handle/132A11/85246]  
专题中国科学院地质与地球物理研究所
通讯作者Long, Xiaoping
作者单位1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
3.Curtin Univ Technol, Dept Appl Geol, Perth, WA 6845, Australia
4.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
6.Chinese Acad Sci, Xinjiang Res Ctr Mineral Resources, Urumqi 830011, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Yujing,Long, Xiaoping,Wilde, Simon A.,et al. Provenance of Early Paleozoic metasediments in the central Chinese Altai: Implications for tectonic affinity of the Altai-Mongolia terrane in the Central Asian Orogenic Belt[J]. LITHOS,2014,210:57-68.
APA Wang, Yujing.,Long, Xiaoping.,Wilde, Simon A..,Xu, Huilong.,Sun, Min.,...&Cai, Keda.(2014).Provenance of Early Paleozoic metasediments in the central Chinese Altai: Implications for tectonic affinity of the Altai-Mongolia terrane in the Central Asian Orogenic Belt.LITHOS,210,57-68.
MLA Wang, Yujing,et al."Provenance of Early Paleozoic metasediments in the central Chinese Altai: Implications for tectonic affinity of the Altai-Mongolia terrane in the Central Asian Orogenic Belt".LITHOS 210(2014):57-68.

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