Geochronology, geochemistry and tectonostratigraphy of Carboniferous strata of the deepest Well Moshen-1 in the Junggar Basin, northwest China: Insights into the continental growth of Central Asia

doi:10.1016/j.gr.2012.10.015

	Geochronology, geochemistry and tectonostratigraphy of Carboniferous strata of the deepest Well Moshen-1 in the Junggar Basin, northwest China: Insights into the continental growth of Central Asia
	He, Deng-Fa 1; Li, Di 1; Fan, Chun 1; Yang, Xiao-Fa 2
刊名	GONDWANA RESEARCH
	2013-09-01
卷号	24 期号:2 页码:560-577
关键词	Andesitic tuffs Zircon SHRIMP U-Pb ages Lu-Hf isotopes Tectonostratigraphy Intra-oceanic arc Continental growth Well Moshen-1 Junggar Basin
ISSN号	1342-937X
DOI	10.1016/j.gr.2012.10.015
文献子类	Article
英文摘要	The Well Moshen-1, the deepest well in the Junggar Basin, is located in the Mosuowan Uplift of the Central Depression. Andesitic magmatic rocks (including the vitric clastic tuff, tuffite and crystal tuff with volcanic-sedimentary rocks) are common in the Carboniferous of the Well Moshen-1. In-situ SHRIMP zircon U-Pb dating and Hf isotope analysis together with geochemical data, seismic profile and magnetic anomaly were carried out on these andesitic tuffs at a depth of 7000 m in the Well Moshen-1 in order to reveal the basement character and the evolution of the Junggar Basin and the crustal accretionary process of this region in the Late Paleozoic. By using high-accuracy dating techniques, we obtained the zircon SHRIMP U-Pb age of the andesitic tuff of 331.7 +/- 3.8 Ma. Geochemical data has also shown that the rocks have typical arc-like geochemical characteristics (low TiO2, Mg#, enrichment in large-ion lithophile elements and depletion in high-field-strength elements, especially Nb, Ta and Ti), suggesting that they are crystallization differentiation products of intra-oceanic arc magmatism. The Carboniferous strata from the Well Moshen-1 are divided into three tectonostratigraphic units with eight periods of volcanic activities, showing a change in the compressional stress of the Mosuowan Uplift from strong to weak and its ending during the Early Permian. The Hf model ages and the formation ages of the zircons from these andesitic tuffs are similar, with Hf-176/Hf-177 ratios ranging from 0.282906 to 0.283030 and epsilon(Hf) (t) values from 11.7 to 15.2, implying a lateral growth of juvenile crust in the Junggar Basin during the Early Carboniferous. Based on the analysis of regional geologic settings of the Junggar region, the Mosuowan Uplift is considered to be a Carboniferous intra-oceanic arc that resulted from a northward subduction of the South Junggar Ocean, which suggests that the lateral accretion of arcs played an important role in crustal growth in this part of Central Asia. (C) 2012 Published by Elsevier B.V. on behalf of International Association for Gondwana Research.
WOS关键词	ZIRCON U-PB ; PHANEROZOIC CRUSTAL GROWTH ; HF-ISOTOPE ANALYSIS ; A-TYPE GRANITES ; WEST JUNGGAR ; OROGENIC BELT ; VOLCANIC-ROCKS ; NW CHINA ; TECTONIC IMPLICATIONS ; ICP-MS
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000322057600007
资助机构	National Science and Technology Major Project(2011ZX05008-001) ; National Science and Technology Major Project(2011ZX05008-001) ; National Natural Science Foundation of China(40739906) ; National Natural Science Foundation of China(40739906) ; Chinese State 973 Project(2011CB201100) ; Chinese State 973 Project(2011CB201100) ; National Science and Technology Major Project(2011ZX05008-001) ; National Science and Technology Major Project(2011ZX05008-001) ; National Natural Science Foundation of China(40739906) ; National Natural Science Foundation of China(40739906) ; Chinese State 973 Project(2011CB201100) ; Chinese State 973 Project(2011CB201100) ; National Science and Technology Major Project(2011ZX05008-001) ; National Science and Technology Major Project(2011ZX05008-001) ; National Natural Science Foundation of China(40739906) ; National Natural Science Foundation of China(40739906) ; Chinese State 973 Project(2011CB201100) ; Chinese State 973 Project(2011CB201100) ; National Science and Technology Major Project(2011ZX05008-001) ; National Science and Technology Major Project(2011ZX05008-001) ; National Natural Science Foundation of China(40739906) ; National Natural Science Foundation of China(40739906) ; Chinese State 973 Project(2011CB201100) ; Chinese State 973 Project(2011CB201100)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/86902]
专题	中国科学院地质与地球物理研究所
通讯作者	He, Deng-Fa
作者单位	1.China Univ Geosci, Key Lab Marine Reservoir Evolut & Hydrocarbon Acc, Minist Educ, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	He, Deng-Fa,Li, Di,Fan, Chun,et al. Geochronology, geochemistry and tectonostratigraphy of Carboniferous strata of the deepest Well Moshen-1 in the Junggar Basin, northwest China: Insights into the continental growth of Central Asia[J]. GONDWANA RESEARCH,2013,24(2):560-577.
APA	He, Deng-Fa,Li, Di,Fan, Chun,&Yang, Xiao-Fa.(2013).Geochronology, geochemistry and tectonostratigraphy of Carboniferous strata of the deepest Well Moshen-1 in the Junggar Basin, northwest China: Insights into the continental growth of Central Asia.GONDWANA RESEARCH,24(2),560-577.
MLA	He, Deng-Fa,et al."Geochronology, geochemistry and tectonostratigraphy of Carboniferous strata of the deepest Well Moshen-1 in the Junggar Basin, northwest China: Insights into the continental growth of Central Asia".GONDWANA RESEARCH 24.2(2013):560-577.