Study of fluid inclusions in quartz veinlets in the xuejiping porphyry copper deposit, northwest yunnan, china
文献类型：期刊论文
| 作者 | Leng ChengBiao1,2; Zhang XingChun1; Qin ChaoJian1; Wang ShouXu1,2; Ren Tao1,2; Wang WaiQuan3 |
| 刊名 | Acta petrologica sinica
 |
| 出版日期 | 2008-09-01 |
| 卷号 | 24期号:9页码:2017-2028 |
| 关键词 | Fluid inclusion Xuejiping porphyry copper deposit Zhongdian Northwest yunnan |
| ISSN号 | 1000-0569 |
| 通讯作者 | Leng chengbiao(lcb8207@163.com) |
| 英文摘要 | The xuejiping porphyry copper deposit is located in the zhongdian arc of the southern yidun island arc in sanjiang district. the porphyries related to copper mineralization consist of indosinian quartz-dioritic porphyrite and quartz-monzonitic porphyry. there are obvious alteration zonations for mineralized porphyry rocks. from the center to the outer parts of the porphyry body, rocks are experienced from strong silicification, quartz-sericite alteration, clay-quartz-sericite alteration, and propylitic alteration respectively. copper ore bodies mainly hosted in strong silicification zone and quartz-sericite alteration zone in the center of the porphyry body. the copper mineralization occurred mainly in type of stockwork veining, with little in type of veinlet-dissemination. a series petrographic, microthermometric and laser raman spectroscopic studies on fluid inclusions (fi) in various kinds of ore rocks from the xuejiping deposit have been carried out in this paper. three types of fluid inclusions have been observed. they are aqueous fi, co(2)-bearing fi and daughter mineral-bearing fi respectively. daughter minerals mainly include salt, calcite, hematite, with minor cacl(2), hydrate and opaque sulfide. the homogenization temperatures (t(h)), salinities, and densities of daughter mineral-bearing fi are mainly in ranges of 230 similar to 420 degrees c, 33.48% similar to 75.40% naclequiv., and 1.01 similar to 1.09g/cm(3) respectively. laser raman spectroscopy of inclusions indicate that the principal fluid component is h(2)o and the gas components are h(2)o and co(2). the coexistence of some aqueous fi and co(2)-rich fi, with similar t(h), and the existence of carbonic inclusions indicate the unmixing of ore-forming fluid generated by "secondary boiling" of primary magmatic fluid. it is believed that the unmixing of co(2) and aqueous phases, the decrease of pressure and temperature and the increase of ph values of ore-foriming fluid are main factors leading to the sulfide deposition in the xuejiping deposit. the fluid of low homogenization temperature and low salinity in inclusions of late stage quartz veins could be formed by the mixing of meteoric and evolved magmatic fluids, with insignificance to the mineralization. |
| WOS关键词 | HYDROTHERMAL ORE-DEPOSITS ; SALINITY MAGMATIC FLUIDS ; ICP-MS ANALYSIS ; CU-AU DEPOSIT ; GOLD DEPOSITS ; CARBON-DIOXIDE ; EVOLUTION ; VAPOR ; ISOTOPE ; SYSTEMS |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000261153700010 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2391102 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Leng ChengBiao |
| 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 100039, Peoples R China 3.Yunnan Geol Survey, Branch Mineral Resources Invest, Dali 671000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Leng ChengBiao,Zhang XingChun,Qin ChaoJian,et al. Study of fluid inclusions in quartz veinlets in the xuejiping porphyry copper deposit, northwest yunnan, china[J]. Acta petrologica sinica,2008,24(9):2017-2028. |
| APA | Leng ChengBiao,Zhang XingChun,Qin ChaoJian,Wang ShouXu,Ren Tao,&Wang WaiQuan.(2008).Study of fluid inclusions in quartz veinlets in the xuejiping porphyry copper deposit, northwest yunnan, china.Acta petrologica sinica,24(9),2017-2028. |
| MLA | Leng ChengBiao,et al."Study of fluid inclusions in quartz veinlets in the xuejiping porphyry copper deposit, northwest yunnan, china".Acta petrologica sinica 24.9(2008):2017-2028. |
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来源：中国科学院大学
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