Geological characteristics, formation age and high-grade ore genesis of Zankan banded iron deposit in the West Kunlun Mountains

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

	Geological characteristics, formation age and high-grade ore genesis of Zankan banded iron deposit in the West Kunlun Mountains
	Li ZhiQuan 1,2; Zhang LianChang 2; Xue ChunJi 1; Zheng MengTian 2; Zhu MingTian 2; Dong LianHui 3; Feng Jing 3
刊名	ACTA PETROLOGICA SINICA
	2018
卷号	34 期号:2 页码:427-446
关键词	Sedimentary-metamorphic Iron Deposit Hydrothermal Modification Zircon U-pb Age West Kunlun Zankan Iron Deposit High-grade Iron Ore Genesis
ISSN号	1000-0569
文献子类	Article
英文摘要	The large-scale Zankan magnetite-rich Fe deposit (belt) in the Taxkorgan ancient landmasses (West Kunlun Mountains), Xinjiang, northwestern China, contains 4 proven Fe commercial ore bodies with more than 2. 5km long and 10 similar to 70 meters thick. High-grade ore bodies (mFe >50%) are 900 meters long and 40 meters thick. The deposit is hosted in the previously defined Paleoproterozoic Bulunkuole Group, a suite of sedimentary rocks experience greenshist-facies metamorphism. The Fe orebodies are interlayered with plagioclase-amphibole schist, biotite-quartz schist, granulite and siliceous rocks. Most Fe ores display metasomatic textures with banded, disseminated or massive structures. Based on geology and geochemical analyses we recognized primary ores and reformed ores. Primary ores are mostly banded. Reformed ores are massive (high-grade ore) and disseminated structures. Ce and Y elements had no clear anomaly (Ce/Ce* = 0. 92 similar to 1. 15, Y/Y* = 0. 86 similar to 0. 94) but positive Eu anomaly (Eu/Eu* =1. 29 similar to 1. 69). The REE pattern in accord with sedimentary metamorphic iron; Reformed ores are mainly disseminated ores and massive ores. Disseminated ores are enriched in REE and enriched in LREE. La and Ce have positive anomaly (La/La* = 1. 12 similar to 1. 46, Ce/Ce * =1. 03 similar to 1. 17). Y has no clear anomaly but strong positive anomaly in Eu (Y/Y* = 0. 66 similar to 0. 72, Eu/Eu * =3. 16 similar to 4. 37). The U-Pb analyses on the detrital zircons from plagioclase-amphibole schist (metasediments) yielded a youngest age of 591 1Ma, coupled with the previous geochronological study to the intrusions in Zankan, further suggested that the depositional age of the Zankan deposit is from 591Ma to 533Ma. Electron microprobe analysis shows the composition such as TiO2, Al2O3, MgO, MnO of magnetite is very few. Magnetite typomorphic studies indicate the Zankan deposit is attached to metamorphism sedimentary iron deposit (BIF) but influenced by the magmatic activation. The phenomenon of skamization, antinolitization, carbonatization and pyritization in high-grade orebodies shows that primary ore dissolved by magmatic hydrothermalism, filling and metasomatic in fracture zone lead to the formation of high-grade massive ores. The felsophyre which carries Fe ore xenoliths and Fe veins yielded an age of Early Paleozoic, represent the age of the hydrothermal modification.
WOS关键词	RARE-EARTH-ELEMENTS ; ABLATION ICP-MS ; U-PB AGE ; SCHIST BELT ; HYDROTHERMAL FLUIDS ; GREENSTONE-BELT ; OROGENIC BELT ; FORMATION BIF ; GEOCHEMISTRY ; ORIGIN
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000429429000017
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/88341]
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	Xue ChunJi
作者单位	1.China Univ Geosci, Sch Earth Sci & Resources, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 3.Xinjiang Bur Geol & Mineral Resources & Dev, Urumqi 830000, Peoples R China
推荐引用方式 GB/T 7714	Li ZhiQuan,Zhang LianChang,Xue ChunJi,et al. Geological characteristics, formation age and high-grade ore genesis of Zankan banded iron deposit in the West Kunlun Mountains[J]. ACTA PETROLOGICA SINICA,2018,34(2):427-446.
APA	Li ZhiQuan.,Zhang LianChang.,Xue ChunJi.,Zheng MengTian.,Zhu MingTian.,...&Feng Jing.(2018).Geological characteristics, formation age and high-grade ore genesis of Zankan banded iron deposit in the West Kunlun Mountains.ACTA PETROLOGICA SINICA,34(2),427-446.
MLA	Li ZhiQuan,et al."Geological characteristics, formation age and high-grade ore genesis of Zankan banded iron deposit in the West Kunlun Mountains".ACTA PETROLOGICA SINICA 34.2(2018):427-446.