Geological characteristics and genesis of the Tuwu porphyry copper deposit, Hami, Xinjiang, Central Asia
文献类型：期刊论文
| 作者 | Han, Chunming; Xiao, Wenjiao; Zhao, Guochun; Mao, Jingwen; Yang, Jianmin; Wang, Zhiliang; Yan, Zhen; Mao, Qigui |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2006-07-01 |
| 卷号 | 29期号:1页码:77-94 |
| 关键词 | porphyry copper deposit ore fluid fluid inclusions hydrothermal alteration radiometric age Tuwu Xinjiang China |
| ISSN号 | 0169-1368 |
| DOI | 10.1016/j.oregeorev.2005.07.032 |
| 文献子类 | Review |
| 英文摘要 | The Tuwu copper deposit, located in the Dananhu-Tousuquan island arc between the Kazakhstan-Junggar and Tarim plates, is one of the largest porphyry copper deposits in western China. Ore-hosting rocks consist of Early Carboniferous (333 +/- 2 Ma) granodiorite- and plagiogranite-porphyries. Both the porphyries are elongate. The orebodies, consisting of veinlet-disseminated mineralization within the porphyries, grade range from 0.30% to 1.50% Cu. Mineralization can be assigned to six stages. Wall-rock alteration associated with the mineralization include silicification, chloritization, epidotization, sericitization and carbonatization. Three alteration zones have been recognized: phyllic zone, chlorite-biotite zone and propylitic zone. Re-Os dating indicates a 322.7 +/- 3 Ma age for the deposit. delta(34)S values of the ore sulfides range from - 0.9 parts per thousand to + 1.3 parts per thousand, with a mean of 0.11 parts per thousand, reflecting a deep sulfur source. delta(18)O values of quartz in the ores range from 7.70 parts per thousand to 9.70 parts per thousand, and the delta(18)O value of chlorite in the ores is 6.62 parts per thousand. Calculated delta(18)O(water) values of quartz and chlorite range from -5.37 parts per thousand to +6.62 parts per thousand and the delta D values range from -48 parts per thousand to -63 parts per thousand, suggesting that the ore fluids were mainly magma-derived in the early stage of mineralization. However, values for the late mineralization stage decrease, suggesting the addition of meteoric waters during the mineralization. Fluid inclusions within quartz grains are generally 3 to 30 mu m in size, with gas proportions ranging from 5% to 60%, mostly from 10% to 15%. Homogenization temperatures of fluid inclusions are relatively low, bracketed between 101 and 409 degrees C, mostly between 100 and 200 degrees C. Salinities exhibit a wide range from 0.35 to 14.61 wt.% NaCl equiv., with a mean of 7.72 wt.% NaCl equiv., suggesting that ore fluids have low to moderate salinity. The ore-bearing plagiogranite porphyries show a strong depletion in heavy rare-earth elements, with average values of Yb and Y of 0.65 and 5.90 ppm, respectively, this being a characteristic geochemical signature for adakite. The geochemical signature of the adakites within the granitoid rocks represents a characteristic guide for further exploration for copper porphyry-type ore deposit in Eastern Tianshan. (C) 2005 Elsevier B.V. All rights reserved. |
| WOS关键词 | CHINESE TIEN-SHAN ; EASTERN TIANSHAN ; NORTHWEST CHINA ; COLLISIONAL TECTONICS ; CONTINENTAL GROWTH ; METALLOGENIC BELT ; VOLCANIC-ROCKS ; MAGMATISM ; EVOLUTION ; GEOCHEMISTRY |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000239102100004 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/66968]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Han, Chunming |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Peoples Republ China State Key Lab Lithosphere Te, Beijing 100029, Peoples R China 2.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China 3.Chinese Acad Geol Sci, Inst Mineral Deposits, Beijing 100037, Peoples R China |
| 推荐引用方式 GB/T 7714 | Han, Chunming,Xiao, Wenjiao,Zhao, Guochun,et al. Geological characteristics and genesis of the Tuwu porphyry copper deposit, Hami, Xinjiang, Central Asia[J]. ORE GEOLOGY REVIEWS,2006,29(1):77-94. |
| APA | Han, Chunming.,Xiao, Wenjiao.,Zhao, Guochun.,Mao, Jingwen.,Yang, Jianmin.,...&Mao, Qigui.(2006).Geological characteristics and genesis of the Tuwu porphyry copper deposit, Hami, Xinjiang, Central Asia.ORE GEOLOGY REVIEWS,29(1),77-94. |
| MLA | Han, Chunming,et al."Geological characteristics and genesis of the Tuwu porphyry copper deposit, Hami, Xinjiang, Central Asia".ORE GEOLOGY REVIEWS 29.1(2006):77-94. |
入库方式： OAI收割
来源：地质与地球物理研究所
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