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	Geochemical characteristic, shrimp zircon u-pb dating and tectonic implication for granitoids in chonghuer basin, altai, xinjiang
	Zeng QiaoSong; Chen GuangHao; Wang He; Shan Qiang
刊名	Acta petrologica sinica
	2007-08-01
卷号	23期号:8页码:1921-1932
关键词	Granitoid Early paleozoic Shrimp zircon u-pb dating Chonghuer basin Altai
ISSN号	1000-0569
通讯作者	Zeng qiaosong(zengqs@gig.ac.cn)
英文摘要	A voluminous of granitoids occur in the north margin of the chonghuer basin. petrochemical analysis and mineralogy study classify them as plagiogranites-tonalites. their outcropping characteristics indicate they are probably controlled by n-s basement structure, which is different from the late paleozoic major nw-ne structuring direction. the granites are rich in elements rb, ba, la, ce, depleted in ta, nb, p, ti, which are a suite of moderate-k calc-alkline rocks. these granitoids belong to metaluminous to peraluminous synorogenic crust melting series. trace elements y-nb, rb-y + nb, nb-ta diagrams display an environment of the active continental marginal volcanic arc. shrimp zircon u-pb method yields a 413 +/- 3.8 ma coordinate age, which represents the crystallization age of magma. this age together with that of volcanic rock (436 +/- 4ma) shows the chonghuer basin was formed in the silurium. these granitoids are consist predominantly of crustal source with some crust-mantle contamination during their emplacement. in the end of ordovician-silurian orogenic event, the regional danymo-heat flow metamorphism resulted from thermal-dome at depth causes middle-upper crust rocks to magmatization and granitization, which formed the s-type gneissoid granitoids in the studied area.
WOS关键词	NORTHWEST CHINA ; CONTINENTAL GROWTH ; CRUSTAL GROWTH ; OROGENIC BELT ; EVOLUTION ; ROCKS ; ACCRETIONARY ; MOUNTAINS ; AGE
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:000249590600013
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2380420
专题	中国科学院大学
通讯作者	Zeng QiaoSong
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Metallogen Dynam, Guangzhou 510640, Peoples R China 2.Grad Univ, Chinese Acad Sci, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Zeng QiaoSong,Chen GuangHao,Wang He,et al. Geochemical characteristic, shrimp zircon u-pb dating and tectonic implication for granitoids in chonghuer basin, altai, xinjiang[J]. Acta petrologica sinica,2007,23(8):1921-1932.
APA	Zeng QiaoSong,Chen GuangHao,Wang He,&Shan Qiang.(2007).Geochemical characteristic, shrimp zircon u-pb dating and tectonic implication for granitoids in chonghuer basin, altai, xinjiang.Acta petrologica sinica,23(8),1921-1932.
MLA	Zeng QiaoSong,et al."Geochemical characteristic, shrimp zircon u-pb dating and tectonic implication for granitoids in chonghuer basin, altai, xinjiang".Acta petrologica sinica 23.8(2007):1921-1932.

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