Study on ore-forming fluid of the dahongshan stratiform copper deposit, yunnan, china
文献类型：期刊论文
| 作者 | Wu KongWen1,2; Zhong Hong1; Zhu WeiGunag1; Leng ChengBiao1,2; Gou TiZhong1,2 |
| 刊名 | Acta petrologica sinica
 |
| 出版日期 | 2008-09-01 |
| 卷号 | 24期号:9页码:2045-2057 |
| 关键词 | Dahongshan Ore-forming fluid Stratiform copper deposit Volcanic-hosted massive sulfide (vhms) deposit |
| ISSN号 | 1000-0569 |
| 通讯作者 | Wu kongwen() |
| 英文摘要 | Stratiform copper deposit is a part of the dahongshan iron-copper deposit in yunnan province, china. the period of mineralization in copper deposit could be divided into two main stages: deposition of stratiform barren copper ore body by volcanic exhalation in submarine environment; late stage fluid rebuilt former ore body and made it economic. in the present study, fluid-inclusion compositions of selected quartz-vein samples from the dahongshan stratiformed copper deposit are addressed. aqueous-rich (l + v), daughter mineral-bearing( l + v + s), pure co2 fluid inclusions and a few co2-bearing three phase fluid inclusions have been found in these samples. calculation indicates that the homogenization temperature, salinity and density range of saline fluid is 103 similar to 456 degrees c, 0.53% similar to 59.76% nacl equiv. and 0.80 similar to 1.45g/cm(3). the homogenization temperature range of liquid co2 is -34.3 similar to 20.8 degrees c indicating a density range of 0.77 similar to 1.09g/cm(3). delta s-34 values of sulfide range from -0.6 parts per thousand to 10.9 parts per thousand, suggesting that the sulfur in sulfide was derived from magma and reduced sulfate in seawater. delta(13) cv-pdb of calcite is -5.6 parts per thousand similar to -3.1 parts per thousand, which meets well with delta c-13 value of mantle (-5.0 +/- 2 parts per thousand) and thus implies that part of carbon in fluid may came from mantle. according to equation of fractionation between calcite-water and quartz-water, the delta o-18(v-smow) value of water in the ore-forming fluid is -1.9 parts per thousand similar to 13.7 parts per thousand, mainly identical to the range of volcanic rocks. on the basis of observation and microthemometry of fluid inclusions, geological characteristics of the ore body, lithofacies and stable isotop feature, it's suggested that the high-temperature, middle-hypersaline, co2-rich fluid released from mantle, which was caused by regional thermal-dynamic metamorphism rebuilt the ore body and concentrated the ore-forming metals. |
| WOS关键词 | INCLUSIONS ; AUSTRALIA ; ISOTOPE ; MINERALIZATION ; QUEENSLAND ; BELT |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000261153700013 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2390410 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Wu KongWen |
| 作者单位 | 1.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550002, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu KongWen,Zhong Hong,Zhu WeiGunag,et al. Study on ore-forming fluid of the dahongshan stratiform copper deposit, yunnan, china[J]. Acta petrologica sinica,2008,24(9):2045-2057. |
| APA | Wu KongWen,Zhong Hong,Zhu WeiGunag,Leng ChengBiao,&Gou TiZhong.(2008).Study on ore-forming fluid of the dahongshan stratiform copper deposit, yunnan, china.Acta petrologica sinica,24(9),2045-2057. |
| MLA | Wu KongWen,et al."Study on ore-forming fluid of the dahongshan stratiform copper deposit, yunnan, china".Acta petrologica sinica 24.9(2008):2045-2057. |
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来源：中国科学院大学
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