Deposit Types, Origin and Metallogenetic Regularity of Taxkorgan Iron Ore Belt in West Kunlun(PDF)
《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]
- Issue:
- 2016年第04期
- Page:
- 427-443
- Research Field:
- 基础地质与矿产地质
- Publishing date:
Info
- Title:
- Deposit Types, Origin and Metallogenetic Regularity of Taxkorgan Iron Ore Belt in West Kunlun
- Author(s):
- ZHANG Lian-chang; FENG Jing; DONG Lian-hui; ZHU Ming-tian; ZHENG Meng-tian; LI Zhi-quan; HAO Yan-hai; SHI Yu-jun
- 1. Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China; 2. Xinjiang Bureau of Geology and Mineral Resources and Development, Urumqi 830000, Xinjiang, China; 3. No.2 Geological Party, Xinjiang Bureau of Geology and Mineral Resources, Kashgar 844002, Xinjiang, China
- Keywords:
- iron formation; deposit type; deposit origin; metallogenic regularity; meta-sedimentary; exhalative sedimentary; Taxkorgan Block; West Kunlun
- PACS:
- P618.31
- DOI:
- -
- Abstract:
- Based on the studies of the geological evolution, field investigation of the ore-bearing rock series, zircon U-Pb isotope chronology and typical iron ore deposits of Taxkorgan Block in West Kunlun, the characteristics and forming ages of regional ore-bearing formation, ore deposit type and metallogenic regularity were summarized. The results show that the previously defined “Bulunkuole Group” actually contains Paleoproterozoic (2 100-2 500 Ma) and Early Cambrian (510-540 Ma) sedimentary metallogenic events, which are suffered to the intensely metamorphism and deformation in both Middle-Late Proterozoic (800-1 800 Ma) and Hercynian-Indosinian (200-410 Ma). Moreover, the genesis of the local high-grade ores may be related to the later hydrothermal activities. The regional iron deposits can be divided into two types. The first one is the meta-sedimentary type iron deposit that is superimposed and transformed by the later hydrothermal fluids; taking Zankan, Mokaer and Jiertiekegou as examples, they form in weakly oxic to reducing marine sedimentary environment of Early Proterozoic active continental margin and the metallogenetic materials are derived from the leaching of basic volcanic rocks by seafloor hydrothermal fluids and a small amount of terrigenous sediments input. The second type is the Early Cambrian marine volcanic exhalative sedimentary iron deposit, such as Kalaizi, Laobing and Yeleke sulfate-iron deposit; their depositional environment should be bathyal-neritic facies weakly oxic to suboxic faulted basin; and the ore-forming materials come from the submarine hydrothermal sedimentary and terrigenous materials input. According to the regional metallogenic regularity, it is speculated that Kalaben-Kalaizi-Molahe belt is the favorable area for prospecting the iron-polymetallic deposits, which associate with the Early Cambrian marine exhalative metallogenic system. While, Jiertiekegou-Zankanbei area, Mokaer and its southern area, which are the northward and southward extensional zones of Zankan iron ore belt, are both the favorable areas for prospecting the meta-sedimentary type of Paleoproterozoic iron deposits.
Last Update: 2016-07-19