Sertengshan Group in Yingpanwan-Dongwufenzi aera, Inner Mongolia: Revision and its geological significance

IMR OpenIR

	Sertengshan Group in Yingpanwan-Dongwufenzi aera, Inner Mongolia: Revision and its geological significance
其他题名	Sertengshan Group in Yingpanwan-Dongwufenzi aera, Inner Mongolia: Revision and its geological significance
	Wu XinWei 1; Xu ZhongYuan 1
	2016
发表期刊	ACTA PETROLOGICA SINICA
ISSN	1000-0569
卷号	32 期号:9 页码:2901-2911
摘要	Sertengshan Group is an important component of Early Precambrian metamorphic basement in Yinshan Block, which is in the western landmass in the North China Craton. It is significant to study the tectonic evolution of the Early Precambrian North China Craton. According to the geological mapping, profiles, geochemical analysis and SHRIMP dating, this article discussed on the composition, primary rock formation, formation environment and the age of the Sertengshan Group. The author believes that the Sertengshan Group is composed of Chensangou Formation, Liushugou Formation and Dongwufenzi Formation. The Chensangou Formation consists of dark gray fine-grained amphibolite and light gray fine-grained biotite plagiogneiss intercalated with hornblende plagiogneiss. The lower member of the Dongwufenzi Formation consists of fine-grained quartz -bearing biotite plagioclase amphibolite, biotite hornblende plagiogneiss and biotite plagiogneiss, which appear in rhythm. On top is gray fine-grained biotite plagiogneiss gripping thin bedded magnetite biotite plagiogneiss. Fine-grained biotite amphibole schist interbedded with light -flesh -colored biotite felsic gneiss belong to the upper member of Dongwufenzi Formation, there is thin bedded tremolite marble on the top. Liushugou Formation is characterized by hornblende schist, two -mica schist, two mica quartz schist, garnet biotite schist and biotite schist. The original rock has two general features: the lower part is dominated by volcanic rock; the upper part is based on elastic sedimentary rocks and chemical sedimentary rock. Volcanic rock is rich in alkali obviously, and medium acidic volcanic is characterized by relative enrichment in Al and large ion lithophile elements (LILE) and light rare earth elements (LREE). It is low in Mg, Y and heavy rare earth elements (HREE). Its geochemical characteristics are similar to adakite, which is formed in tectonic environment of active continental margin. We sampled separately in felsic gneiss and biotite schist, which are interbedded in the upper part of Dongwufenzi Formation. According to the SHRIMP U-Pb isotopic dating, we got the diagenetic age (1980 9Ma, 1946 16Ma) and the metamorphic age (1901+/-15 Ma, 1893 +/- 66Ma). In conclusion, Sertengshan Group deposited between 1. 95 1. 98Ga in the island -arc environment of an active continental margin, and brought about metamorphism with an orogenic movement in 1. 9Ga.
关键词	NORTH CHINA CRATON ULTRAHIGH-TEMPERATURE METAMORPHISM GUYANG GREENSTONE-BELT U-PB GEOCHRONOLOGY TECTONIC HISTORY JINING COMPLEX SHRIMP ZIRCON KEY ISSUES EVOLUTION AGE Sertengshan Group SHRIMP U-Pb Active continental margin
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:5789788
引用统计	被引频次：4[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/145699
专题	中国科学院金属研究所
作者单位	1.吉林大学 2.中国科学院金属研究所
推荐引用方式 GB/T 7714	Wu XinWei,Xu ZhongYuan. Sertengshan Group in Yingpanwan-Dongwufenzi aera, Inner Mongolia: Revision and its geological significance[J]. ACTA PETROLOGICA SINICA,2016,32(9):2901-2911.
APA	Wu XinWei,&Xu ZhongYuan.(2016).Sertengshan Group in Yingpanwan-Dongwufenzi aera, Inner Mongolia: Revision and its geological significance.ACTA PETROLOGICA SINICA,32(9),2901-2911.
MLA	Wu XinWei,et al."Sertengshan Group in Yingpanwan-Dongwufenzi aera, Inner Mongolia: Revision and its geological significance".ACTA PETROLOGICA SINICA 32.9(2016):2901-2911.