Institutional Repository of Key Laboratory of Mineral Resources, Chinese Academy of Sciences
| Geology and geochemistry of the high-grade Zankan magnetite ore, Western Kunlun Mountains, NW China | |
| Li, Zhiquan1,2; Zhou, Yongzhang1; Yu, Pengpeng1; Zhang, Lianchang3; Wei, Wei4; Li, Yuhao2; Konhauser, Kurt O.2; Robbins, Leslie J.5 | |
| 2022-11-01 | |
| Source Publication | ORE GEOLOGY REVIEWS
 |
| ISSN | 0169-1368 |
| Volume | 150Pages:18 |
| Abstract | Over the past decade, several magnetite-rich iron deposits have been discovered in the Taxkorgan region of the western Kunlun Mountains of northwestern China. These include the Zankan, Jiertieke, Laobing, Yelike, and Taaxi iron deposits. Prospective iron ore reserves are estimated at over 1 billion tons, with an average magnetite grade of 28% (Feng et al., 2018). The largest of the deposits, the Zankan Iron Deposit (ZID), is estimated to contain 628 million tons of iron ore, with at least 10% of the ores being high-grade (TFe > 50 wt%). However, the geological processes by which the high-grade ores in the ZID were formed remains poorly constrained. In this study, we combine whole rock and ore geochemistry data, oxygen and sulfur stable isotopes, and uranium-lead and hafnium isotopes from zircons to elucidate the plausible mechanisms underpinning the formation of the ZID ores. Based on mineralogy, we define two ore types. Type 1 is essentially comprised of quartz and magnetite, interlayered with schist, and it retains the sedimentary fabrics of the precursor iron-rich sediments which were an iron formation (IF). Type 2 formed by the intrusion of a dacite-porphyry into the IF which led to magnetite remobilization and recrystallization as manifest in magnetite-ferro actinolite veining. Rare earth element (REE) characteristics of the high-grade ores differs from those of the precursor IF, with chondrite normalized REE patterns showing enrichment of LREE and significant negative europium anomalies close to those of the dacite-porphyry. The oxygen and sulfur isotopic composition of magnetite and pyrite in the high-grade ores suggests a further meteoric influence on the ZID with silica enrichment driven by leaching of the precursor IF from else-where in the sequence. Circulation of the ore forming fluid is attributable to the development of faults and fracture zones that resulted from the intrusion of the dacite-porphyry. Laser ablation uranium-lead analyses of zircons from the dacite-porphyry yield two groups with ages of 551.25 +/- 3.32 Ma and 497.82 +/- 3.81 Ma, representing captured detrital zircons and the intrusive age of dacite porphyry, respectively. Given the intimate geological relationship between the dacite-porphyry and T2 ore, we suggest that the high-grade ores are formed after 497.82 Ma. Collectively our field observations and geochemical data reveal the detailed alteration processes that led to the development of the high-grade iron ores in the ZID, identifying distinctive features that may help to guide future exploration for additional high-grade ore deposits in the Taxkorgan region. |
| Keyword | Iron formation High-grade magnetite ores Dacite-porphyry Silica leaching The Zankan iron deposit Western Kunlun Mountains |
| DOI | 10.1016/j.oregeorev.2022.105129 |
| Funding Organization | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development program of China ; National Key Research and Development program of China ; Guangdong Science and Technology Depart- ment ; Guangdong Science and Technology Depart- ment ; Natural Sciences and En- gineering Research Council of Canada ; Natural Sciences and En- gineering Research Council of Canada ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development program of China ; National Key Research and Development program of China ; Guangdong Science and Technology Depart- ment ; Guangdong Science and Technology Depart- ment ; Natural Sciences and En- gineering Research Council of Canada ; Natural Sciences and En- gineering Research Council of Canada ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development program of China ; National Key Research and Development program of China ; Guangdong Science and Technology Depart- ment ; Guangdong Science and Technology Depart- ment ; Natural Sciences and En- gineering Research Council of Canada ; Natural Sciences and En- gineering Research Council of Canada ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development program of China ; National Key Research and Development program of China ; Guangdong Science and Technology Depart- ment ; Guangdong Science and Technology Depart- ment ; Natural Sciences and En- gineering Research Council of Canada ; Natural Sciences and En- gineering Research Council of Canada |
| WOS Keyword | BANDED IRON-FORMATION ; HAMERSLEY PROVINCE ; LU-HF ; ISOTOPE SYSTEMATICS ; HYDROTHERMAL ORIGIN ; TRACE-ELEMENTS ; OROGENIC BELT ; TOM-PRICE ; GENESIS ; ZIRCON |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China ; National Key Research and Development program of China ; Guangdong Science and Technology Depart- ment ; Natural Sciences and En- gineering Research Council of Canada ; [41372100] ; [U1911202] ; [U1703242] ; [41902205] ; [2021YFC2900300] ; [GDKTP2020053500] ; [2020B1111370001] |
| Funding Organization | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development program of China ; National Key Research and Development program of China ; Guangdong Science and Technology Depart- ment ; Guangdong Science and Technology Depart- ment ; Natural Sciences and En- gineering Research Council of Canada ; Natural Sciences and En- gineering Research Council of Canada ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development program of China ; National Key Research and Development program of China ; Guangdong Science and Technology Depart- ment ; Guangdong Science and Technology Depart- ment ; Natural Sciences and En- gineering Research Council of Canada ; Natural Sciences and En- gineering Research Council of Canada ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development program of China ; National Key Research and Development program of China ; Guangdong Science and Technology Depart- ment ; Guangdong Science and Technology Depart- ment ; Natural Sciences and En- gineering Research Council of Canada ; Natural Sciences and En- gineering Research Council of Canada ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development program of China ; National Key Research and Development program of China ; Guangdong Science and Technology Depart- ment ; Guangdong Science and Technology Depart- ment ; Natural Sciences and En- gineering Research Council of Canada ; Natural Sciences and En- gineering Research Council of Canada |
| WOS Research Area | Geology ; Mineralogy ; Mining & Mineral Processing |
| WOS Subject | Geology ; Mineralogy ; Mining & Mineral Processing |
| WOS ID | WOS:000892616600001 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.iggcas.ac.cn/handle/132A11/107653 |
| Collection | 矿产资源研究院重点实验室 |
| Corresponding Author | Zhou, Yongzhang; Yu, Pengpeng |
| Affiliation | 1.Sun Yat sen Univ, Sch Earth Sci & Geol Engn, Guangdong Prov Key Lab Geol Proc & Mineral Resourc, Guangzhou 510275, Peoples R China 2.Univ Alberta, Dept Earth & Atmospher Sci, Edmonton T6G 2E3, AB, Canada 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 4.China Univ Geosci, Sch Earth Sci, Wuhan 430074, Peoples R China 5.Univ Regina, Dept Geol, Regina S4S 0A2, SK, Canada |
| Recommended Citation GB/T 7714 | Li, Zhiquan,Zhou, Yongzhang,Yu, Pengpeng,et al. Geology and geochemistry of the high-grade Zankan magnetite ore, Western Kunlun Mountains, NW China[J]. ORE GEOLOGY REVIEWS,2022,150:18. |
| APA | Li, Zhiquan.,Zhou, Yongzhang.,Yu, Pengpeng.,Zhang, Lianchang.,Wei, Wei.,...&Robbins, Leslie J..(2022).Geology and geochemistry of the high-grade Zankan magnetite ore, Western Kunlun Mountains, NW China.ORE GEOLOGY REVIEWS,150,18. |
| MLA | Li, Zhiquan,et al."Geology and geochemistry of the high-grade Zankan magnetite ore, Western Kunlun Mountains, NW China".ORE GEOLOGY REVIEWS 150(2022):18. |
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