Geology, geochemistry, and geochronology of the Zhibo iron deposit in the Western Tianshan, NW China: Constraints on metallogenesis and tectonic setting

doi:10.1016/j.oregeorev.2013.09.016

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	Geology, geochemistry, and geochronology of the Zhibo iron deposit in the Western Tianshan, NW China: Constraints on metallogenesis and tectonic setting
	Jiang, Zongsheng 5; Zhang, Zuoheng ; Wang, Zhihua 1; Duan, Shigang ; Li, Fengming 2; Tian, Jingquan 3
刊名	ORE GEOLOGY REVIEWS
	2014
卷号	57 页码:406-424
关键词	Volcanic rocks Metallogenesis Tectonic setting U-Pb zircon ages Zhibo iron deposit Western Tianshan
ISSN号	0169-1368
DOI	10.1016/j.oregeorev.2013.09.016
英文摘要	The Zhibo iron deposit (337 million metric tons with 26%-68% Fe) is one of several recently discovered iron deposits in the Awulale iron metallogenetic belt, in the eastern part of the Western Tianshan (NW China). The deposit is hosted by volcanic and volcaniclastic rocks of the Carboniferous Dahalajunshan Formation. Orebodies are tabular-lenticular in shape and consist of four ore types, including massive, banded, brecciated, and disseminated ores. Iron-oxides are predominantly low-Ti magnetite, with minor hematite. Dendritic and platy magnetite is characteristic features at Zhibo. Pyrite is the most common sulfides. Associated alteration assemblages mainly include pyroxene, albite, K-feldspar, actinolite and epidote. Four paragenetic stages of alteration and mineralization are recognized: stage I, characterized by albite-diopside alteration; stage II, represented by widespread actinolite-K-feldspar alteration; stage III, dominated by epidote-pyrite veins; and stage IV, occurring chiefly as hematite-calcite-quartz veins. Geochemical analyses indicate that the volcanic host rocks are calc-alkaline, enriched in LILEs (e.g., Rb, K) and LREEs, and depleted in HFSEs (e.g., Nb, Ta, Ti), supporting a subduction origin for the volcanic rocks and the ore-related magma. LA-ICP-MS U-Pb dating of igneous zircon from an andesite (12ZB56) and a disseminated ore (12ZB06) yielded identical ages (within error) of 328.7 +/- 2.1 Ma and 329.9 +/- 1.5 Ma, considered to represent the crystallization ages of the host rocks. It has been suggested that iron mineralization at both Zhibo and Chagangnuoer was broadly coeval. The timing of mineralization at Zhibo was bracketed widely between ca. 316 Ma (the age of mineralization at Chagangnuoer) and ca. 330 Ma. This study indicates that the Zhibo ore is typical of volcanic-hosted magnetite deposit formed in a subduction setting. Mineralogical and geochemical characteristics suggest a magmatic origin for the Zhibo deposit, and the most likely origin of the ore-related magma is partial melting of a mantle wedge that had been fertilized by fluids released from subducted slabs. Fe-rich melts (or fluids), derived from the mafic magma, were channeled along major faults and fractures within a volcano, forming the Zhibo deposit. (C) 2013 Elsevier B.V. All rights reserved.
学科主题	矿床地质
WOS关键词	CARBONIFEROUS VOLCANIC-ROCKS ; TRACE-ELEMENT GEOCHEMISTRY ; ASIAN OROGENIC BELT ; SOUTH-CENTRAL PERU ; U-PB AGE ; NORTHWESTERN CHINA ; CHEMICAL CLASSIFICATION ; COLLISIONAL TECTONICS ; CONTINENTAL GROWTH ; MAGNETITE DEPOSIT
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000328869100025
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40428]
专题	中国地质调查局国土资源航空物探遥感中心
作者单位	1.Chinese Acad Geol Sci, Inst Mineral Resources, MLR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China 2.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 3.Xinjiang Bur Geol & Mineral Resources, Urumqi 83000, Peoples R China 4.Xinjiang Bur Geol & Mineral Resources, Geol Team 3, Kuerle 841000, Peoples R China 5.中国地质科学院矿产资源研究所
推荐引用方式 GB/T 7714	Jiang, Zongsheng,Zhang, Zuoheng,Wang, Zhihua,et al. Geology, geochemistry, and geochronology of the Zhibo iron deposit in the Western Tianshan, NW China: Constraints on metallogenesis and tectonic setting[J]. ORE GEOLOGY REVIEWS,2014,57:406-424.
APA	Jiang, Zongsheng,Zhang, Zuoheng,Wang, Zhihua,Duan, Shigang,Li, Fengming,&Tian, Jingquan.(2014).Geology, geochemistry, and geochronology of the Zhibo iron deposit in the Western Tianshan, NW China: Constraints on metallogenesis and tectonic setting.ORE GEOLOGY REVIEWS,57,406-424.
MLA	Jiang, Zongsheng,et al."Geology, geochemistry, and geochronology of the Zhibo iron deposit in the Western Tianshan, NW China: Constraints on metallogenesis and tectonic setting".ORE GEOLOGY REVIEWS 57(2014):406-424.