Petrogenesis and ore genesis of the ilmenite-rich Kendelong mafic-ultramafic intrusion in Wulan, Qinghai

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

	Petrogenesis and ore genesis of the ilmenite-rich Kendelong mafic-ultramafic intrusion in Wulan, Qinghai
	Kang Zhen 1,2,3; Jiang ChangYi 3,4; Ling JinLan 3; Zhao YanFeng 3; Song YanFang 3; Zhou Wei 3
刊名	ACTA PETROLOGICA SINICA
	2015-08-01
卷号	31 期号:8 页码:2193-2210
关键词	Mafic-ultramafic intrusions Llmenite enrichment Zircon U-Pb age Juvenile lithospheric mantle The northern margin of the Qaidam basin
文献子类	Article
英文摘要	The Kendelong mafic-ultramafic intrusion is located at the Olongbuluke micro-continent, which is in the northern margin of the Qaidam basin, Qinghai Province. The rock types of this fragmentarily outcropped intrusion widely range from serpentinite, clinoperidotite, iherzolite, olivine websterite, olivine clinopyroxenite, olivine gabbro, olivine-bojite, bojite, alterated gabbro to anorthosite. Scatteredly and speckledly disseminated ilmenite ore exists in the pyroxenolite and gabbro. The content of the ilmenite is 5% similar to 10%, in some samples it can achieve 10% similar to 20%. Enrichment of ilmenite happened at the late stage of magma evolution. The zircon U-Pb age of the gabbro from the intrusion is 491 +/- 3Ma (MSWD = O. 7). According to the geochemical compositions, the intrusion has a tholeiitic affinity. The REE patterns of all rocks have the same characteristics, namely the right slope with LREE enrichment. The complex is characterized by enrichment of LILEs (Cs, Rb, Ba, Th, U) and depletion of HFSEs (Nb, Ta, Ti, P). (Sr-87/Sr-86), values vary from 0. 704731 to 0. 710280, epsilon(Nd) (t) values are between -4. 49 and +0. 83. Fractional crystallization of olivine, orthopyroxene, clinopyxene, plagioclase takes place in magma condensation process, and crustal contamination is significant from the evidence of petrochemistry. The primary magma of the Kendelong intrusion is basaltic, which origined from a juvenile lithospheric mantle that was previously metasomatized by subduction zone fluids /melts in the Paleozoic. It may be the highly differentiated magma that achieved the enrichment of the iron titanium oxide. It lead to the formation of the ilmenite deposit in the condition of f(02) < NNO.
WOS关键词	PLUME-LITHOSPHERE INTERACTION ; NORTHERN TIBETAN PLATEAU ; UHP METAMORPHIC BELT ; U-PB GEOCHRONOLOGY ; ABLATION-ICP-MS ; NW CHINA ; GEOCHEMICAL CHARACTERISTICS ; FRACTIONAL CRYSTALLIZATION ; CONTINENTAL COLLISION ; SKAERGAARD INTRUSION
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000361075200006
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62261]
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, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Changan Univ, Coll Earth Sci & Land Recourses, Xian 710054, Peoples R China 4.Minist Educ, Key Lab Western Chinas Mineral Resources & Geol E, Xian 710054, Peoples R China
推荐引用方式 GB/T 7714	Kang Zhen,Jiang ChangYi,Ling JinLan,et al. Petrogenesis and ore genesis of the ilmenite-rich Kendelong mafic-ultramafic intrusion in Wulan, Qinghai[J]. ACTA PETROLOGICA SINICA,2015,31(8):2193-2210.
APA	Kang Zhen,Jiang ChangYi,Ling JinLan,Zhao YanFeng,Song YanFang,&Zhou Wei.(2015).Petrogenesis and ore genesis of the ilmenite-rich Kendelong mafic-ultramafic intrusion in Wulan, Qinghai.ACTA PETROLOGICA SINICA,31(8),2193-2210.
MLA	Kang Zhen,et al."Petrogenesis and ore genesis of the ilmenite-rich Kendelong mafic-ultramafic intrusion in Wulan, Qinghai".ACTA PETROLOGICA SINICA 31.8(2015):2193-2210.