Zircon SHRIMP U-Pb dating of ultramafic rock and mafic granulite from;Qinglongyu in Yishui County, Shandong Province

	Zircon SHRIMP U-Pb dating of ultramafic rock and mafic granulite from;Qinglongyu in Yishui County, Shandong Province
	Zhao ZiRan 3; Song HuiXia ; Shen QiHan ; Song Biao 1
刊名	ACTA PETROLOGICA SINICA
	2013
卷号	29 期号:2 页码:551-563
关键词	SHRIMP U-Pb ages of zircon Ultramafic rock Mafic Granulites Yishui complex
ISSN号	1000-0569
英文摘要	This study is focus on zircon SHRIMP U-Pb dating of ultramafic rock and mafic granulite from Qinglonyu, Yishui County, Shandong Province. Ultramafic rocks occur in the form of xenoliths in Yishui complex, without developed spinifex structure. Its oxides with high MgO ultramafic komatiites rich CaO, low SiO2, TiO2, K2O and Na2O content is characterized. Its major mineral assemblage to clinopyroxene + olivine +/- orthopyroxene + chromite, and metamorphic mineral to hornblende + serpentine is characterized. The ultramafic rock have fairly low REE contents with high LREE/HREE ratios (3.35 similar to 4.40) and negative Ce and Eu anomalies. The trace element to Ba, Nb, Zr negative anomalies and Nd, Sm positive anomalies is characterized. Zircon SHRIMP U-Pb dating results indicate that the magmatic crystal zircon age of 2657 similar to 2702Ma and the metamorphic zircon ages of 2551 similar to 2585Ma. The ultramafic rock formed ages between 2585 similar to 2657Ma. The mafic granulites oxide compositions indicate its original rock is high Mg oceanic island tholeiite. The granulite facies-high amphibolite facies metamorphism related to the anatectic magma intrusion role of Neoarchean. The mineral assemblages with hypersthene + clinopyroxene +/- hornblende + plagioclase +/- garnet are characterized. The late alteration related to the intrusion of gabbro, diabase and quartz diorite. The late altered mineral assemblages include talc + sericite + chlorite etc. REE composition of light and heavy rare earth elements is no different and no Eu anomaly is characterized. Trace element compositions of Nb, Zr, P, Ti negative anomalies and Sr, K is abnormal for the characteristics. SHRIMP U-Pb zircon dating results show that the granulite facies-amphibolite facies metamorphism age of 2498.4 +/- 7.6Ma, leading to granulite facies-amphibolite facies metamorphic anatectic magma crystallization age of 2551 +/- 24Ma, and the late alteration age of 2231 similar to 2235Ma and 1850 +/- 19Ma.
学科主题	火成岩岩石学
WOS关键词	COMPLEX
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000317531300014
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40167]
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, Beijing 100037, Peoples R China. 2.Beijing SHRIMP Ctr, Beijing 100037, Peoples R China. 3.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Zhao ZiRan,Song HuiXia,Shen QiHan,et al. Zircon SHRIMP U-Pb dating of ultramafic rock and mafic granulite from;Qinglongyu in Yishui County, Shandong Province[J]. ACTA PETROLOGICA SINICA,2013,29(2):551-563.
APA	Zhao ZiRan,Song HuiXia,Shen QiHan,&Song Biao.(2013).Zircon SHRIMP U-Pb dating of ultramafic rock and mafic granulite from;Qinglongyu in Yishui County, Shandong Province.ACTA PETROLOGICA SINICA,29(2),551-563.
MLA	Zhao ZiRan,et al."Zircon SHRIMP U-Pb dating of ultramafic rock and mafic granulite from;Qinglongyu in Yishui County, Shandong Province".ACTA PETROLOGICA SINICA 29.2(2013):551-563.