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	Petrogenesis of karamaili alkaline a-type granites from east junggar, xinjiang (nw china) and their relationship with tin mineralization
	Su, Yuping; Tang, Hongfeng; Sylvester, Paul J.; Liu, Congiang; Qu, Wenjun; Hou, Guangshun; Cong, Feng
刊名	Geochemical journal
	2007
卷号	41期号:5页码:341-357
关键词	Alkaline granites Tin deposits Zircon u-pb dating Re-os isochron Petrogenesis East junggar
ISSN号	0016-7002
通讯作者	Tang, hongfeng(tanghongfeng@vip.gyig.ac.cn)
英文摘要	Several types of granites including alkaline granites and alkali feldspar granites are distributed in the karamaili tectonic belt of east junggar, xinjiang, china. some medium-small tin deposits are located within or near the contact zones of the granitic intrusions. the alkaline granites share all the features commonly observed in peralkaline a-type granites. they contain alkalic mafic minerals such as riebeckite and aegirine; have high contents of sio2, alkalis, rb, th, zr, hf, ree (except eu), and high ratios of feo*/mgo and ga/al; and show strong depletions in ba, sr, eu in the spidergrams. laser ablation-icpms u-pb zircon geochronology indicates a crystallization age of ca. 305 ma for the granites; tims analyses of the granites found high epsilon(nd)(t) values of +5.9 to +6.5. considering their geochemical features, alkaline granites most likely formed by fractional crystallization of granodioritic magmas, which were probably produced by partial melting of lower crustal basaltic to andesitic rocks formed from oceanic crustal materials that were deeply buried during late paleozoic subduction and accretion. six molybdenite samples from the sareshike tin deposit in east junggar yielded an isochron age of 307 +/- 11 ma (2 sigma) and a weighted mean model age of 306.5 +/- 3.4 ma, consistent with zircon u-pb ages of the alkaline granites. low re contents (0.323-0.961 ppm) in the molybdenite suggest that they originated from crustal sources related to the alkaline granites. considering their identical ages, close spatial distribution, and similar sources, we argue that the a-type granites have a genetic relationship with the tin mineralization, and that the same association may be important elsewhere.
WOS关键词	LACHLAN FOLD BELT ; RE-OS AGES ; SOUTHEASTERN AUSTRALIA ; CONTINENTAL GROWTH ; HIGHLY PRECISE ; MO DEPOSIT ; MOLYBDENITE ; CRUST ; ORIGIN ; SYSTEM
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
语种	英语
出版者	GEOCHEMICAL SOC JAPAN
WOS记录号	WOS:000251386200004
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2382835
专题	中国科学院大学
通讯作者	Tang, Hongfeng
作者单位	1.Chinese Acad Sci, Inst Geochem, Lab Study Earths Interior & Geofluids, Guiyang 550002, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 3.Mem Univ Newfoundland, Dept Earth Sci, St John, NF A1B 3X5, Canada 4.Chinese Acad Geol Sci, Natl Res Ctr Geoanal, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Su, Yuping,Tang, Hongfeng,Sylvester, Paul J.,et al. Petrogenesis of karamaili alkaline a-type granites from east junggar, xinjiang (nw china) and their relationship with tin mineralization[J]. Geochemical journal,2007,41(5):341-357.
APA	Su, Yuping.,Tang, Hongfeng.,Sylvester, Paul J..,Liu, Congiang.,Qu, Wenjun.,...&Cong, Feng.(2007).Petrogenesis of karamaili alkaline a-type granites from east junggar, xinjiang (nw china) and their relationship with tin mineralization.Geochemical journal,41(5),341-357.
MLA	Su, Yuping,et al."Petrogenesis of karamaili alkaline a-type granites from east junggar, xinjiang (nw china) and their relationship with tin mineralization".Geochemical journal 41.5(2007):341-357.

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