Geochronology and geochemistry of igneous rocks from the Kongling terrane: Implications for Mesoarchean to Paleoproterozoic crustal evolution of the Yangtze Block

doi:10.1016/j.precamres.2014.09.009

	Geochronology and geochemistry of igneous rocks from the Kongling terrane: Implications for Mesoarchean to Paleoproterozoic crustal evolution of the Yangtze Block
	Li, Longming 1,2,3; Lin, Shoufa 1,2; Davis, Donald W.4; Xiao, Wenjiao 3; Xing, Guangfu 5; Yin, Changqing 2,3
刊名	PRECAMBRIAN RESEARCH
	2014-12-01
卷号	255 页码:30-47
关键词	Kongling terrane Archean TTG Amphibolite Granite Diabase
ISSN号	0301-9268
DOI	10.1016/j.precamres.2014.09.009
文献子类	Article
英文摘要	The Kongling terrane is a high grade metamorphic complex, exposed in the northern part of the Yangtze Block. It mainly consists of TTG gneisses, amphibolites, migmatites and metasedimentary rocks. The amphibolites occur as enclaves or layers in the TTG gneisses, and both the amphibolites and the TTG gneisses are intruded by granitic and diabasic dykes. U-Pb ages of zircons from the amphibolite, migmatite, granite and diabase are determined by LA-ICP-MS. Igneous zircons from an amphibolite have an upper intercept age of 2945 13 Ma (MSWD = 1.2) while metamorphic zircons yield an upper intercept age of 2870 +/- 13 Ma (MSWD = 0.9). Igneous zircons from a migmatite and a granite have weighted average Pb-207/Pb-206 age and upper intercept age of 1987 +/- 5 Ma (MSWD = 1.7) and 1985 +/- 6 Ma (MSWD = 1.3), respectively. Igneous zircons from a diabase dyke yield an upper intercept age of 1783 +/- 23 Ma (MSWD = 0.86). The protoliths of the amphibolites are tholeiitic basalts and exhibit slightly depleted to variably enriched LREE patterns with moderate enrichment of Rb and Ba and-depletion in Nb and Zr, similar to oceanic island arc volcanics. They have high Cr, Co, Ni, MgO and FeOT content with negative epsilon(Nd)(t) values, indicating that the tholeiitic basalts resulted from high degree batch melting of enriched mantle wedge. The granites are strongly peraluminous with A/CNK > 1.1 and they have relatively low HREE and Y and negative epsilon(Nd)(t) values. Detailed elemental and isotopic data suggest that they formed by partial melting of recycled products of the TTG gneisses, amphibolites and older crustal material in a continental collisional setting. The diabases are characterized by relatively high Al2O3, FeOT and TiO2 contents and low Zr/Ba ratios. Their high initial Sr-87/Sr-86 ratios and negative epsilon(Nd)(t) values indicate that they were derived from enriched lithospheric mantle in extensional setting. Therefore, the Kongling terrane occurred as an oceanic island arc at ca. 2.95 Ga, and experienced earliest metamorphism at ca. 2.87 Ga which probably contributed to the formation of the high grade metamorphic terrane. This terrane experienced a strong collisional event at similar to 2.0 Ga which may have led to cratonization over all of the Yangtze Block, and also experienced lithospheric extension during 1.85-1.78 Ga. The global similar to 2.0 Ga Paleoproterozoic collisional events were related to the assembly of supercontinent Columbia. (C) 2014 Elsevier B.V. All rights reserved.
WOS关键词	U-PB AGE ; SOUTHERN WEST GREENLAND ; HF ISOTOPE COMPOSITION ; GA CONTINENTAL-CRUST ; TRACE-ELEMENT ; VOLCANIC-ROCKS ; SUBDUCTION ZONES ; JIANGNAN OROGEN ; DETRITAL ZIRCON ; TECTONIC DISCRIMINATION
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000347578000002
资助机构	China Geology Survey(1212011121116) ; China Geology Survey(1212011121116) ; China Geology Survey(1212011121116) ; China Geology Survey(1212011121116) ; China NSFC(40725009) ; China NSFC(40725009) ; China NSFC(40725009) ; China NSFC(40725009) ; NSERC grant of Canada ; NSERC grant of Canada ; NSERC grant of Canada ; NSERC grant of Canada ; China Geology Survey(1212011121116) ; China Geology Survey(1212011121116) ; China Geology Survey(1212011121116) ; China Geology Survey(1212011121116) ; China NSFC(40725009) ; China NSFC(40725009) ; China NSFC(40725009) ; China NSFC(40725009) ; NSERC grant of Canada ; NSERC grant of Canada ; NSERC grant of Canada ; NSERC grant of Canada ; China Geology Survey(1212011121116) ; China Geology Survey(1212011121116) ; China Geology Survey(1212011121116) ; China Geology Survey(1212011121116) ; China NSFC(40725009) ; China NSFC(40725009) ; China NSFC(40725009) ; China NSFC(40725009) ; NSERC grant of Canada ; NSERC grant of Canada ; NSERC grant of Canada ; NSERC grant of Canada ; China Geology Survey(1212011121116) ; China Geology Survey(1212011121116) ; China Geology Survey(1212011121116) ; China Geology Survey(1212011121116) ; China NSFC(40725009) ; China NSFC(40725009) ; China NSFC(40725009) ; China NSFC(40725009) ; NSERC grant of Canada ; NSERC grant of Canada ; NSERC grant of Canada ; NSERC grant of Canada
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84936]
专题	中国科学院地质与地球物理研究所
通讯作者	Lin, Shoufa
作者单位	1.Hefei Univ Technol, Sch Resources & Environm, Hefei 230009, Peoples R China 2.Univ Waterloo, Dept Earth & Environm Sci, Waterloo, ON N2L 3G1, Canada 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 4.Univ Toronto, Dept Earth Sci, Toronto, ON M5S 3B1, Canada 5.Nanjing Inst Geol & Mineral Resources, Nanjing 210016, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Li, Longming,Lin, Shoufa,Davis, Donald W.,et al. Geochronology and geochemistry of igneous rocks from the Kongling terrane: Implications for Mesoarchean to Paleoproterozoic crustal evolution of the Yangtze Block[J]. PRECAMBRIAN RESEARCH,2014,255:30-47.
APA	Li, Longming,Lin, Shoufa,Davis, Donald W.,Xiao, Wenjiao,Xing, Guangfu,&Yin, Changqing.(2014).Geochronology and geochemistry of igneous rocks from the Kongling terrane: Implications for Mesoarchean to Paleoproterozoic crustal evolution of the Yangtze Block.PRECAMBRIAN RESEARCH,255,30-47.
MLA	Li, Longming,et al."Geochronology and geochemistry of igneous rocks from the Kongling terrane: Implications for Mesoarchean to Paleoproterozoic crustal evolution of the Yangtze Block".PRECAMBRIAN RESEARCH 255(2014):30-47.