Petrological and geochemical features of the early Paleozoic granitic gneisses and iron ores in the Tianhu iron deposit, Eastern Tianshan, NW China: Implications for ore genesis

doi:10.1016/j.lithos.2017.06.021

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

	Petrological and geochemical features of the early Paleozoic granitic gneisses and iron ores in the Tianhu iron deposit, Eastern Tianshan, NW China: Implications for ore genesis
	Zheng, Jiahao 1,2,3; Mao, Jingwen 1; Yang, Fuquan 1; Chai, Fengmei 4; Shen, Ping 3
刊名	LITHOS
	2017-08-01
卷号	286 页码:426-439
关键词	Tianhu iron deposit Granitic gneisses Eastem Tianshan Early Paleozoic Ore genesis
ISSN号	0024-4937
DOI	10.1016/j.lithos.2017.06.021
文献子类	Article
英文摘要	This paper reports whole-rock geochemical, zircon U-Pb and Hf isotopic data for ore-hosted granitic gneisses, mineral compositions of oxides, and sulfur isotopic data for sulfides in iron ores from the Tianhu deposit, central part of the Eastern Tianshan. Our results can provide crucial constraints on the genesis of granitic gneisses and early Paleozoic tectonic setting of the Eastern Tianshan. LA-ICP-MS U-Pb dating on magmatic zircons yielded weighted mean Pb-206/U-238 ages of 463 to 438 Ma, interpreted as the crystallization ages of the granitic protoliths and the formation ages of the Tianhu Group. Zircon U-Pb age of ore-hosted granitic gneiss (ca. 459 Ma) can provide reliable constrains on upper limit for iron mineralization age in the Tianhu deposit. Geochemical characteristics suggest that the protoliths of the Tianhu granitic gneisses are metaluminous to weakly peraluminous high-K calc-alkaline granitic rocks, exhibiting typical subduction-related features such as strong enrichment in LREE and LILE and depletion in HFSE. Zircon Hf isotopic compositions show a positive trend from similar to 463 to similar to 438 Ma, indicating that similar to 460 Ma magmas came from both ancient and juvenile sources, whereas similar to 438 Ma magmas involved more juvenile material. Some early Paleozoic granitoids were recently identified in the Eastern Tianshan with the ages between ca. 475 and ca. 425 Ma. The formation of these early Paleozoic granitoids was in response to subduction processes, suggesting that subduction of Junggar Ocean probably began in the Early Ordovician and lasted until Late Silurian.
WOS关键词	ZIRCON U-PB ; MAFIC-ULTRAMAFIC INTRUSIONS ; HF ISOTOPIC COMPOSITIONS ; ASIAN OROGENIC BELT ; A-TYPE GRANITOIDS ; NORTHWEST CHINA ; CU DEPOSIT ; CONTINENTAL GROWTH ; HOST PORPHYRIES ; LASER-ABLATION
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000408286700028
资助机构	NSFC(U1403391 ; China Postdoctoral Science Foundation(2016LH0003 ; Ministry of Land and Resources Public Welfare Industry Special Funds for Scientific Research Project(201211073) ; 41390442) ; 2017M610984) ; NSFC(U1403391 ; China Postdoctoral Science Foundation(2016LH0003 ; Ministry of Land and Resources Public Welfare Industry Special Funds for Scientific Research Project(201211073) ; 41390442) ; 2017M610984) ; NSFC(U1403391 ; China Postdoctoral Science Foundation(2016LH0003 ; Ministry of Land and Resources Public Welfare Industry Special Funds for Scientific Research Project(201211073) ; 41390442) ; 2017M610984) ; NSFC(U1403391 ; China Postdoctoral Science Foundation(2016LH0003 ; Ministry of Land and Resources Public Welfare Industry Special Funds for Scientific Research Project(201211073) ; 41390442) ; 2017M610984)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/61880]
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
通讯作者	Zheng, Jiahao
作者单位	1.Chinese Acad Geol Sci, Inst Mineral Resources, MLR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China 2.Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 4.Xinjiang Univ, Xinjiang Key Lab Geodynam Proc & Metallogen Progn, Coll Geol & Min Engn, Urumqi 830049, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Jiahao,Mao, Jingwen,Yang, Fuquan,et al. Petrological and geochemical features of the early Paleozoic granitic gneisses and iron ores in the Tianhu iron deposit, Eastern Tianshan, NW China: Implications for ore genesis[J]. LITHOS,2017,286:426-439.
APA	Zheng, Jiahao,Mao, Jingwen,Yang, Fuquan,Chai, Fengmei,&Shen, Ping.(2017).Petrological and geochemical features of the early Paleozoic granitic gneisses and iron ores in the Tianhu iron deposit, Eastern Tianshan, NW China: Implications for ore genesis.LITHOS,286,426-439.
MLA	Zheng, Jiahao,et al."Petrological and geochemical features of the early Paleozoic granitic gneisses and iron ores in the Tianhu iron deposit, Eastern Tianshan, NW China: Implications for ore genesis".LITHOS 286(2017):426-439.