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	Geochemical constraints on the petrogenesis of the abulangdang ultramafic intrusion, sichuan province, china.
	Ma YanSheng1,2; Tao Yan1; Zhong Hong1; Zhu FeiLin1,2; Wang XingZhen3
刊名	Acta petrologica sinica
	2009-05-01
卷号	25期号:5页码:1146-1158
关键词	Elip Ultramafic rocks Partial melting Abulangdang Sichuan province Sw china
ISSN号	1000-0569
通讯作者	Ma yansheng(mayansheng0904@163.com)
英文摘要	The abulangdang ultramafic intrusion lies in the west margin of the yangtze block, the middle of kang-dian axis of earth and the west side of the an-ning river deep fault. the zoned-like rocks of abulangdang are, from the core to the outside, composed of plagioclase-bearing peridotite, pyroxene peridotite, plagioclase pyroxene peridotite, and plagioclase olivine pyroxenite. the significant cu-ni-pge mineralization occurs along the marginal facies. recently, as the increasing strength of geological survey of the nation and the increasing prices of metal, especially the noble metals, the abulangdang intrusion attracted attention once again. however, it is still poor on the aspect of geochemistry though abundant data of geological survey for the intrusion has been accumulated. this paper provided a basic study on major elements, trace elements and platinum-group elements for the abulangdang ultramafic rocks as well as the compositions of the rock-forming minerals. we discussed the primary magma of the intrusion, the degree of partial melting of the mantle, and the process of rock-forming. the results show that abulangdang ultramafic rocks are products of tectonic-magmatic activity in the emeishan large igneous province (elip) and belong to tholeiitic evolution trend. the abulangdang ultramafic rocks were formed from picritic-like magmas generated by relatively high degrees (18%) of partial melting of an oib-type mantle source. during ascent of the magma, the mafic minerals which crystallized in the early stage concentrated in the middle of the magma conduit and formed the zoned-like pattern of the rocks. the accumulation of mafic minerals which represented as olivine occurred after the magma intruded abulangdang magma chamber. at the same time, the crystallization differentiation of magma would continue in the magma chamber and assimilation between magma and country rocks probably caused the liquation of sulfide which occurred near the marginal facies of the intrusion. in the course of late crustal movement, the abulangdang magma chamber showed up in the earth's surface and thus the abulangdang ultramafic rocks which we see at present.
WOS关键词	LARGE IGNEOUS PROVINCE ; GROUP ELEMENT GEOCHEMISTRY ; CONTINENTAL FLOOD BASALTS ; ND ISOTOPE GEOCHEMISTRY ; PAN-XI AREA ; SW CHINA ; SOUTHWESTERN CHINA ; SULFIDE DEPOSITS ; HIGH-MG ; ORIGIN
WOS研究方向	Geology
WOS类目	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000266684900009
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2395593
专题	中国科学院大学
通讯作者	Ma YanSheng
作者单位	1.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550002, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Anhui Inst Technol, Dept Resource & Environm Engn, Huinan 232001, Peoples R China
推荐引用方式 GB/T 7714	Ma YanSheng,Tao Yan,Zhong Hong,et al. Geochemical constraints on the petrogenesis of the abulangdang ultramafic intrusion, sichuan province, china.[J]. Acta petrologica sinica,2009,25(5):1146-1158.
APA	Ma YanSheng,Tao Yan,Zhong Hong,Zhu FeiLin,&Wang XingZhen.(2009).Geochemical constraints on the petrogenesis of the abulangdang ultramafic intrusion, sichuan province, china..Acta petrologica sinica,25(5),1146-1158.
MLA	Ma YanSheng,et al."Geochemical constraints on the petrogenesis of the abulangdang ultramafic intrusion, sichuan province, china.".Acta petrologica sinica 25.5(2009):1146-1158.

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