Xiangshanxi composite Cu-Ni-Ti-Fe deposit belongs to comagmatic evolution product: Evidences from ore microscopy, zircon U-Pb chronology and petrological geochemistry, Hami, Xinjiang, NW China.

	Xiangshanxi composite Cu-Ni-Ti-Fe deposit belongs to comagmatic evolution product: Evidences from ore microscopy, zircon U-Pb chronology and petrological geochemistry, Hami, Xinjiang, NW China.
	Xiao QingHua 1,2; Qin KeZhang 1; Tang Dong Mei 1; Su BenXun 1; Sun He 1,2; San JinZhu 1,3; Cao MingJian 1,2; Hui WeiDong 3
刊名	ACTA PETROLOGICA SINICA
	2010-02-01
卷号	26 期号:2 页码:503-522
关键词	Xiangshanxi Mafic-ultramafic Complex Ore Microscopy Zircon U-pb Chronology Geochemistry Cu-ni Sulfide And Ti-fe Oxide Paragenesis Xinjiang
ISSN号	1000-0569
文献子类	Article
英文摘要	So far, Xiangshanxi intrusion is the unique complex that was discoveried hosting both Ti-Fe oxide and Cu-Ni sulfide mineralizations in eastern Tianshan area. The genetic relationship between Ti-Fe oxide and Cu-Ni sulfide has been debated because of the lack of precise age data or trace element and microscopy evidences. This article studied the geology, penology, geochemistry and geochronology of the Xiangshan intrusion By detailed observation in the field and under the microscope and electron microprobe analysis, we found the complicated paragenetic relationship between Cu-Ni sulfides and Ti-Fe oxides in disseminated Cu-Ni ore nom Xiangshanxi By high-precision SIMS zircon U-Pb dating,we obtained the concordant age of 278. 6 +/- 1 8Ma(MSWD = 1 2) for Ti-Fe-bearing gabbros in Xiangshanxi, the age is almost identical to that of the Cu-Ni sulfide-bearing hornblend gabbro in the middle pall of Xiangshang intrusion These evidences provide the support for paragenetic relationships between Cu-Ni sulfide and Ti-Fe oxide mineralization in Xiangshanxi The petrochemical characteristics of Xiangshan intrusion indicate that Xiangshan mafic-ultramafic complex (including Ti-Fe-bearing gabbro in Xiangshanxi) are products of comagmatic evolution and show a trend of tholentic magmatic differentiation. Compared with middle part and eastern part of Xiangshan intrusion, Xiangshanxi gabbros are relatively richer in BEE, SiO(2) (average value 48.99%) and K(2)O + Na(2)O (average rude 3 43%) and TiO(2) (average value 1 26%), but poorer in MgO (average Mg" value 62 4),which show the features of higher degree fractionation and relatively late-stage of magma evolution By inversion of primary magma composition, the result indicate that the parent magma of Xiangshan intrusion belongs to tholentic basalt magma with about 10% MgO, 9% FeO and 1.2% TiO(2). So, a likely ore-forming mechanism for Xiangshanxi Ti-Fe dposit may be that the common parent tholentic magma became Ti-Fe enrichment in residual liquids through relatively high degrees of fraction crystallization During the magma rising into crust, crustal contamination may not only induce sulfide saturation in magma, but also increase in f(02) magmatic system, and therefore change the trend of tholeutic magma differentiation, leading to Fe oxide crystallization From a genetic viewpoint, ore-formation of Xiangshanxi Ti-Fe deposit in eastern Tianshan area suggests that except for high-Ti bastal magma in Palm area of Sichan Province, the common tholentic magma (not so Ti-Fe enrichment), in favorable conditions, such as lower f(02), relatively high degree of fractionation and crustal contamination in relatively late stage of magma evlution, may also form large scale Ti-Fe oxide deposit.
WOS关键词	EASTERN TIANSHAN MOUNTAINS ; MAFIC-ULTRAMAFIC INTRUSIONS ; LARGE IGNEOUS PROVINCE ; OS ISOTOPIC ANALYSIS ; SW CHINA ; SULFIDE DEPOSIT ; GEOLOGICAL IMPLICATION ; LAYERED INTRUSION ; FLUID INCLUSIONS ; OXYGEN FUGACITY
WOS研究方向	Geology
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000275734400013
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/72678]
专题	中国科学院地质与地球物理研究所
通讯作者	Xiao QingHua
作者单位	1.Chinese Acad Sci, Key Lab Mineral Resources, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 3.Xinjiang Geol & Explorat Bur Nonferrous Met, Hami 839000, Peoples R China
推荐引用方式 GB/T 7714	Xiao QingHua,Qin KeZhang,Tang Dong Mei,et al. Xiangshanxi composite Cu-Ni-Ti-Fe deposit belongs to comagmatic evolution product: Evidences from ore microscopy, zircon U-Pb chronology and petrological geochemistry, Hami, Xinjiang, NW China.[J]. ACTA PETROLOGICA SINICA,2010,26(2):503-522.
APA	Xiao QingHua.,Qin KeZhang.,Tang Dong Mei.,Su BenXun.,Sun He.,...&Hui WeiDong.(2010).Xiangshanxi composite Cu-Ni-Ti-Fe deposit belongs to comagmatic evolution product: Evidences from ore microscopy, zircon U-Pb chronology and petrological geochemistry, Hami, Xinjiang, NW China..ACTA PETROLOGICA SINICA,26(2),503-522.
MLA	Xiao QingHua,et al."Xiangshanxi composite Cu-Ni-Ti-Fe deposit belongs to comagmatic evolution product: Evidences from ore microscopy, zircon U-Pb chronology and petrological geochemistry, Hami, Xinjiang, NW China.".ACTA PETROLOGICA SINICA 26.2(2010):503-522.