Lithological, chronological and geochemical characteristics of Cihai iron deposit, Eastern Xinjiang: Constraints on genesis of mafic-ultramafic and syenite intrusions and mineralization

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院矿产资源研究重点实验室

	Lithological, chronological and geochemical characteristics of Cihai iron deposit, Eastern Xinjiang: Constraints on genesis of mafic-ultramafic and syenite intrusions and mineralization
	Chen Bo 1,2,3; Qin KeZhang 1; Tang DongMei 1; Mao YaJing 1; Feng HongYe 4; Xue ShengChao 1,2; Yao ZhuoSen 1,2
刊名	ACTA PETROLOGICA SINICA
	2015-08-01
卷号	31 期号:8 页码:2156-2174
关键词	Cihai Fe deposit Mafic-ultramafic intrusions Syenite Zircon U-Pb age Petro-geochemsity Beishan
文献子类	Article
英文摘要	Interpretation of the relationship between mafic-ultramafic rocks and iron mineralization, as well as the relationship between syenite and mafic rocks in Cihai iron district is the key to understand the diagenesis, metallogenetic process and tectonic settings. SIMS Zircon U-Pb dating for diabase, gabbro-diabase in Cihai, gabbro in Cinan, and amphibole-quartz-syenite in Cibei yields results of 275. 1 +/- 2. 2Ma, 281. 9 +/- 3. 2Ma, 273. 0 +/- 1. 9Ma and 273. 0 +/- 1. 8Ma respectively, which is coincident with the age of mafic-ultramafic rocks containing nickel, copper and V-Ti-magnetite in Beishan and Xinjiang regions. Characteristics of rock geochemistry show the process that from peroxenite to gabbro then to diabase, the Ti enriches gradually and the value of Mg-# and m/f first increase and then decrease. The amphibole-quartz-syenite, with signature of A-type granite, has complementary relation with gabbro and diabase in rock genesis. The features of geochronology and geochemistry indicate that pyroxenite, gabbro in Cinan, diabase, gabbro-diabase in Cihai and amphibole-quartz-syenite in Cibei belong to the comagmatic evolutionary series. The magma evolution is slightly contaminated by crust. During the early stage of magma evolution, the fractional crystallization of magnetite dominates the change of magma component. While the magma developed to the gabbro stage, crystallization differentiation plays the key role. Fractional crystallization of magnetite is earlier than ilmenite. Magmatic sulphide is the transitional product of magnetite and ilmenite crystallization. The diagenesis and metallogeny of mafic-ultramafic rocks in Cihai iron district may be temporarily and spatially associated with the Early-Permian Tarim Large Igneous Province.
WOS关键词	NW CHINA IMPLICATIONS ; ASIAN OROGENIC BELT ; U-PB GEOCHRONOLOGY ; CU-NI SULFIDE ; TARIM BASIN ; SKAERGAARD INTRUSION ; NORTHWEST CHINA ; ALTAY OROGENS ; TRACE-ELEMENT ; BEISHAN AREA
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000361075200004
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62250]
专题	地质与地球物理研究所_中国科学院矿产资源研究重点实验室
作者单位	1.Chinese Acad Sci, Key Lab Mineral Resources, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Grad Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.China Railway Resources Investment Ltd, Beijing 100039, Peoples R China 4.North China Univ Sci & Technol, Tangshan 063009, Peoples R China
推荐引用方式 GB/T 7714	Chen Bo,Qin KeZhang,Tang DongMei,et al. Lithological, chronological and geochemical characteristics of Cihai iron deposit, Eastern Xinjiang: Constraints on genesis of mafic-ultramafic and syenite intrusions and mineralization[J]. ACTA PETROLOGICA SINICA,2015,31(8):2156-2174.
APA	Chen Bo.,Qin KeZhang.,Tang DongMei.,Mao YaJing.,Feng HongYe.,...&Yao ZhuoSen.(2015).Lithological, chronological and geochemical characteristics of Cihai iron deposit, Eastern Xinjiang: Constraints on genesis of mafic-ultramafic and syenite intrusions and mineralization.ACTA PETROLOGICA SINICA,31(8),2156-2174.
MLA	Chen Bo,et al."Lithological, chronological and geochemical characteristics of Cihai iron deposit, Eastern Xinjiang: Constraints on genesis of mafic-ultramafic and syenite intrusions and mineralization".ACTA PETROLOGICA SINICA 31.8(2015):2156-2174.