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	Dongyue lake adakitic volcanic rocks with high mg-# in north qiangtang block: petrogenesis and its tectonic implication
	YanHui, Dong1,2; Qiang, Wang1; JiFeng, Xu1; Feng, Zi1,2
刊名	Acta petrologica sinica
	2008-02-01
卷号	24期号:2页码:291-302
关键词	Qiangtang block Tibetan plateau Doge coring Adakitic rocks Delamination
ISSN号	1000-0569
通讯作者	Yanhui, dong()
英文摘要	The lavas near by the dongyue lake. area is a part of cenozoic duoge coring-zhuerken wula mountain volcanic province, which is the earliest post-collision magmatic activity recognized in the tibetan plateau. shrimp u-pb zircon dating obtains an age of 44.3 +/- 1. 8ma for a dongyue lake lava. in geochemistry, the dongyue lake lavas are intermediate-acid rocks, their sio2 range of 55% similar to 67%, belonging to high-k calc-alkaline series. in addition, they show enrichment of liles and lree, depletion of y and hree, as well as have gentle positive eu anomaly,high sr concentration and sr/y ratios. so they display geochemical characteristics similar to those of an adakite rock defined by defant and drumond(1990). meanwhile, the dongyue lake lavas also have high mg-# ( mg / mg + fe-total) and high compatible elements such as cr and ni contents. we suggest that the dongyue lake. adakitic lavas were generated by partial inciting of a delaminated lower crust, similar to the petrogenesis of the high mg-# adakitic rocks in east china. thus, eruption of the dongyue lake adakitic rocks probably indicates that an eocene delamination event took place. beneath north qiangtang block.
WOS关键词	LOWER CONTINENTAL-CRUST ; INTRUSIVE ROCKS ; TIBETAN PLATEAU ; EAST CHINA ; LITHOSPHERIC MANTLE ; ANHUI PROVINCE ; SOUTHERN TIBET ; SUBDUCTED SLAB ; ARC MANTLE ; ORIGIN
WOS研究方向	Geology
WOS类目	Geology
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000259117600009
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2390881
专题	中国科学院大学
通讯作者	YanHui, Dong
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Isotope Geochronol & Geochem, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	YanHui, Dong,Qiang, Wang,JiFeng, Xu,et al. Dongyue lake adakitic volcanic rocks with high mg-# in north qiangtang block: petrogenesis and its tectonic implication[J]. Acta petrologica sinica,2008,24(2):291-302.
APA	YanHui, Dong,Qiang, Wang,JiFeng, Xu,&Feng, Zi.(2008).Dongyue lake adakitic volcanic rocks with high mg-# in north qiangtang block: petrogenesis and its tectonic implication.Acta petrologica sinica,24(2),291-302.
MLA	YanHui, Dong,et al."Dongyue lake adakitic volcanic rocks with high mg-# in north qiangtang block: petrogenesis and its tectonic implication".Acta petrologica sinica 24.2(2008):291-302.

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