Paleoproterozoic ultrahigh-temperature pelitic granulites in the northern Sulu orogen: Constraints from petrology and geochronology

doi:10.1016/j.precamres.2014.09.004

	Paleoproterozoic ultrahigh-temperature pelitic granulites in the northern Sulu orogen: Constraints from petrology and geochronology
	Xiang, Hua 5; Zhang, Ze-Ming ; Lei, Heng-Cong ; Qi, Min ; Dong, Xin ; Wang, Wei 2; Lin, Yan-Hao
刊名	PRECAMBRIAN RESEARCH
	2014
卷号	254 页码:273-289
关键词	UHT granulites Paleoproterozoic Sulu orogen South China Craton Columbia supercontinent
ISSN号	0301-9268
DOI	10.1016/j.precamres.2014.09.004
英文摘要	Ultrahigh-temperature (UHT) pelitic granulites are reported firstly in Weihai area, the northern segment of Sulu ultrahigh-pressure (UHF) metamorphic belt. The pelitic granulites, together with other metamorphic supracrustal rocks, including gneisses, marbles, quarzites and calc-silicates, occur as blocks within the orthogneisses which formed at Neoproterozoic but underwent Triassic UHP metamorphism. The pelitic granulites have a peak mineral assemblage of garnet + sillimanite + K-feldspar + plagioclase (antiperthite) + quartz + rutile +/- ilmenite biotite. The P-T pseudosection and mineral isopleths thermo-barometry modeled in the MnNCFKMASHTO system constrain P-T conditions of 11-13 kbar and >900 degrees C for the peak stage. In situ LA-ICPMS U-Pb dating and trace element analyses show that zircons from the two granulites have low Th/U ratios, flat HREE patterns with negative Eu anomalies, typical of granulit-efacies metamorphic zircon. These zircons yielded (207)pb/Pb-206 ages of 1818 +/- 10 Ma to 1854 +/- 9 Ma, representing the time of the UHT granulite-facies metamorphism. Our result, together with previous investigations, indicates that the Mid-Paleoproterozoic tectonothermal event was widespread in the northern margin of the South China Craton. The Paleoproterozoic UHT granulite-facies metamorphism and associated anatexis, and coeval magmatism possibly derived from accretionary orogeny during the assembly of the supercontinent Columbia. (C) 2014 Elsevier B.V. All rights reserved.
学科主题	变质岩岩石学
WOS关键词	U-PB AGE ; HIGH-GRADE METAMORPHISM ; COESITE-BEARING ZIRCON ; EAST-CENTRAL CHINA ; LIAO-JI BELT ; SOUTH CHINA ; CONTINENTAL-CRUST ; TRACE-ELEMENT ; DABIE OROGEN ; HF ISOTOPE
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000343786400016
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40493]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geol, State Key Lab Continental Tecton & Dynam, Beijing 100037, Peoples R China 2.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 3.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China 4.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Peoples R China 5.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Xiang, Hua,Zhang, Ze-Ming,Lei, Heng-Cong,et al. Paleoproterozoic ultrahigh-temperature pelitic granulites in the northern Sulu orogen: Constraints from petrology and geochronology[J]. PRECAMBRIAN RESEARCH,2014,254:273-289.
APA	Xiang, Hua.,Zhang, Ze-Ming.,Lei, Heng-Cong.,Qi, Min.,Dong, Xin.,...&Lin, Yan-Hao.(2014).Paleoproterozoic ultrahigh-temperature pelitic granulites in the northern Sulu orogen: Constraints from petrology and geochronology.PRECAMBRIAN RESEARCH,254,273-289.
MLA	Xiang, Hua,et al."Paleoproterozoic ultrahigh-temperature pelitic granulites in the northern Sulu orogen: Constraints from petrology and geochronology".PRECAMBRIAN RESEARCH 254(2014):273-289.