Characteristics of gold-bearing mineral and occurrence of gold in the yangshan gold field, gansu province.
文献类型：期刊论文
| 作者 | Mao ShiDong1,2,3; Yang RongSheng4; Qin Yan1; Guo JunHua2 |
| 刊名 | Acta petrologica sinica
 |
| 出版日期 | 2009-11-01 |
| 卷号 | 25期号:11页码:2776-2790 |
| 关键词 | Gold-bearing mineral Gold occurrence Empa Arsenian pyrite Arsenopyrite Yangshan gold field |
| ISSN号 | 1000-0569 |
| 通讯作者 | Mao shidong(maoshidong78@163.com) |
| 英文摘要 | In this paper we use electron microprobe analyzer (empa) to insight the distribution and concentration of gold, arsenium, sulfur, iron in the gold-bearing minerals of different ore-forming stages of the yangshan carlin-like gold field, gansu province, china. arsenian pyrite and arsenopyrite are recognized as the most important gold-bearing minerals in this deposit. pyrites of different ore-forming stages have distinct features and element contents. the framboidal and colloidal pyrite formed in sedimentary diagenesis have the lowest contents of as (0.10%) and an (0.08%); and the coarse-grain pyrite (0.40 similar to 1.00mm) formed in early-stage hydrothermal metallogenesis, which were crystallized slowly at relatively high temperature (270 similar to 300 degrees c), is the next, with as and au contents of 0.27% and 0.09%, respectively. the fine-grain arsenian pyrite (0.05 similar to 0.20mm) rapidly precipitated in middle (main) hydrothermal stage at temperature of 210 similar to 270 degrees c, contains maximum as and an (3.45% as and 0.11% an for m1 substage; and 3.88% as and 0.14% au for m2 substage). in as-poor pyrites formed in sedimentary diagenesis and early hydrothermal stage gold mainly occurs as nanometer-sized particles of native au (au(0)), whereas gold in middle-stage arsenian pyrite mainly presents as au(+). because of the absorption of s-bearing au complex (an(hs)(0)) on pyrite, the content of au(+) in arsenian pyrite has a strong dependence on the availability of vacant sites and/or defects on the surface, which results from the increase of as activity. the loss of h(2)s during sulifidation and fluid-boiling causes gold deposition and formation of arsenian pyrite in the main hydrothermal stage. |
| WOS关键词 | CARLIN-TYPE DEPOSITS ; U-PB AGES ; ARSENIAN PYRITE ; INVISIBLE GOLD ; QINLING OROGEN ; NEVADA ; COMPLEXES ; ORE ; GEOCHEMISTRY ; SULFIDES |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000273455000008 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2399105 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Mao ShiDong |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, KLMD, Guangzhou 510640, Peoples R China 2.12th Gold Team Chinese Peoples Armed Police, Chengdu 610036, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 4.Peking Univ, Key Lab Orogen & Crust Evolut, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mao ShiDong,Yang RongSheng,Qin Yan,et al. Characteristics of gold-bearing mineral and occurrence of gold in the yangshan gold field, gansu province.[J]. Acta petrologica sinica,2009,25(11):2776-2790. |
| APA | Mao ShiDong,Yang RongSheng,Qin Yan,&Guo JunHua.(2009).Characteristics of gold-bearing mineral and occurrence of gold in the yangshan gold field, gansu province..Acta petrologica sinica,25(11),2776-2790. |
| MLA | Mao ShiDong,et al."Characteristics of gold-bearing mineral and occurrence of gold in the yangshan gold field, gansu province.".Acta petrologica sinica 25.11(2009):2776-2790. |
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来源：中国科学院大学
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