Petrological characteristics and zircon U-Pb age for Susong metamorphic complex rocks in Anhui Province

	Petrological characteristics and zircon U-Pb age for Susong metamorphic complex rocks in Anhui Province
	Shi YongHong 1; Wang CiSong 2; Kang Tao 1; Xu XuFeng 1; Lin Wei 3
刊名	ACTA PETROLOGICA SINICA
	2012-10-01
卷号	28 期号:10 页码:3389-3402
关键词	Susong metamorphic complex rocks Garnet-mica schists Epidote-amphibole facies Analysis of Raman spectroscopy Peak metamorphic age
ISSN号	1000-0569
文献子类	Article
英文摘要	The metamorphic extent and age of the Susong metamorphic complex rocks (SSMC) have been attended by many geologists all along, and more controversies still exist. For this reason, three samples of garnet-mica schists from SSMC have been selected and analyzed in detail. On the basis of the analysis of petrology, the SSCM had underwent three metamorphic event, and the peak mineral assemblage includes garnet + biotite + muscovite + plagioclase feldspar + quartz + epidote + rutile + calcite + apatite. No any imprint from ultrahigh pressure or glaucophane-schiste facie metamorphism occurs. The peak P-T conditions for SSCM are T = 460 similar to 540 degrees C and P = 0.85 similar to 1.10GPa according to the thermodynamic appraise, which is in the range of epidote-amphibole facie. The zircon U-Pb ages from three samples in the SSCM have been divided into 4 groups, the ages from the core in zircons show three ranges of age; 2.38 similar to 2.56Ga, 1.97 similar to 2.19Ga and 0.78 similar to 0.9Ga, which reflect age of detrital zircon and imply that the SSCM have complex origin of materials. The ages from margin in zircons is in the range of 248 similar to 255 Ma with the 0.01 similar to 0.05 of Th/U, and the sector zoning and cloudy zoning at the margin areas of zircons have been displayed through the analysis of cathodoluminescene (CL) images, so the zircons at margin should be metamorphic overgrowth zircons. The mean average age of 251 +/- 4Ma from these metamorphic overgrowth zircons represent the peak metamorphic age for the SSCM in the light of the analysis Raman spectroscopy and petrology. Combined with the investigation from early petrology, ages and tectonic setting, the north boundary of the SSCM should be located along Liuling-Mashigou-Shanlong.
WOS关键词	SUBDUCTED CONTINENTAL-CRUST ; ULTRAHIGH-PRESSURE ECLOGITE ; SULU OROGENIC BELT ; EASTERN CHINA ; DABIE OROGEN ; ISOTOPE GEOCHEMISTRY ; O-ISOTOPE ; UHP ROCKS ; GARNET ; EXHUMATION
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000311328500024
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84512]
专题	中国科学院地质与地球物理研究所
通讯作者	Shi YongHong
作者单位	1.Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Peoples R China 2.Bur Geol & Mineral Explorat, Geol Team 321, Tongling 244033, 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	Shi YongHong,Wang CiSong,Kang Tao,et al. Petrological characteristics and zircon U-Pb age for Susong metamorphic complex rocks in Anhui Province[J]. ACTA PETROLOGICA SINICA,2012,28(10):3389-3402.
APA	Shi YongHong,Wang CiSong,Kang Tao,Xu XuFeng,&Lin Wei.(2012).Petrological characteristics and zircon U-Pb age for Susong metamorphic complex rocks in Anhui Province.ACTA PETROLOGICA SINICA,28(10),3389-3402.
MLA	Shi YongHong,et al."Petrological characteristics and zircon U-Pb age for Susong metamorphic complex rocks in Anhui Province".ACTA PETROLOGICA SINICA 28.10(2012):3389-3402.