Origin of felsic volcanic rocks associated with vms-type deposits in the er'langping group, east qinling: implications for ore-forming setting
文献类型：期刊论文
| 作者 | Xu YongHang1,2; Zhao TaiPing1; Chen Wei1,3 |
| 刊名 | Acta petrologica sinica
 |
| 出版日期 | 2009-02-01 |
| 卷号 | 25期号:2页码:399-412 |
| 关键词 | East qinling Er'langping group Felsic volcanic rocks Vms deposit Hydrothermal alteration Metallogenic environment |
| ISSN号 | 1000-0569 |
| 通讯作者 | Xu yonghang(yonghang_xu@163.com) |
| 英文摘要 | The early paleozoic er'langping group is composed of volcanic rocks and sedimentary rocks, and exposes between the kuanping group and qinling group in the east qinling orogenic bell. the volcanogenic massive sulfide (vms) deposits are mainly hosted by the felsic volcanic rocks of the er'langping group. the felsic volcanic rocks are enriched in lile, depleted in hfse (nb, ta), hight th/ta ratios (average being 24.0), typical subduction-related signature. the characteristics of sm-147/nd-144 (0.107754 to 0.154978), nd-143/nd-144 (0.512465 to 0.512895), and epsilon(nd) (t = 467ma) (+0.83 to +7.63) demonstrate that they were generated from depleted mantle. we propose that the felsic volcanic rocks formed by fractional crystallization of mafic magmas at mid-crustal levels (10 similar to 15 km) associated with minor crustal assimilation. alteration indexes, the alteration index (ai) against the chlorite-carbonate-pyrite index (ccpi), termed the "alteration box plot". this "alteration box plot" was used to characterize the different alteration trends related to massive sulfide ores, and to assist in the distinction of er'langping group related hydrothermal alteration from regional diagenetic alteration. according to the difference of zr/y ratios and sr isotopes between east er'langping group and west er'langping group, we propose that the shuidongling and shangzhuangping deposits in the west er'langping group probably formed in nascent back-are environment. these deposits are enriched in pb, zn, ba, similar to kuroko-type deposit from japan. the liushanyan deposit in the east er'langping group, however, is enriched in cu, zn, probably formed in a mature back-are environment (like fiji basin). |
| WOS关键词 | MASSIVE SULFIDE DEPOSITS ; TRACE-ELEMENT GEOCHEMISTRY ; BACK-ARC BASIN ; CENTRAL CHINA ; FRACTIONAL CRYSTALLIZATION ; TECTONIC EVOLUTION ; OROGENIC BELT ; IGNEOUS ROCKS ; PETROGENESIS ; NORTH |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000265945400014 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2394456 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Xu YongHang |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 2.Third Inst Oceanog State Ocean Adm, Open Lab Ocean & Coast Environm Geol, Xiamen 361005, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu YongHang,Zhao TaiPing,Chen Wei. Origin of felsic volcanic rocks associated with vms-type deposits in the er'langping group, east qinling: implications for ore-forming setting[J]. Acta petrologica sinica,2009,25(2):399-412. |
| APA | Xu YongHang,Zhao TaiPing,&Chen Wei.(2009).Origin of felsic volcanic rocks associated with vms-type deposits in the er'langping group, east qinling: implications for ore-forming setting.Acta petrologica sinica,25(2),399-412. |
| MLA | Xu YongHang,et al."Origin of felsic volcanic rocks associated with vms-type deposits in the er'langping group, east qinling: implications for ore-forming setting".Acta petrologica sinica 25.2(2009):399-412. |
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来源：中国科学院大学
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