Geochemical characteristics and tectonic setting of ore-bearing carbonatites in hunglongpu mo ore field
文献类型：期刊论文
| 作者 | Xu Cheng1; Song WenLei1,2; Qi Liang1; Wang LinJun1,2 |
| 刊名 | Acta petrologica sinica
 |
| 出版日期 | 2009-02-01 |
| 卷号 | 25期号:2页码:422-430 |
| 关键词 | Carbonate dykes Rare earth elements Tectonic setting Huanglongpu mo ore field East qinling molybdenum mineralization belt |
| ISSN号 | 1000-0569 |
| 通讯作者 | Xu cheng(xucheng1999@hotmail.com) |
| 英文摘要 | The hunglongpu mo ore field is a unique metallogenic type in the east qinling molybdenum mineralization belt. most of them are associated with carbonatite dykes with molybdenite re-os age of 220ma. carbonatites collected from shijiawan ii deposit are characterized by high sr and bee contents. c and o isotopic compositions of the calcites from the carbonatites are fallen into the range of the "primary igneous carbonatites" with the delta(13)c(pdb) and delta(18)o(smow) values ranging from -6.75 to -9.92 parts per thousand and 8.69 to 9.48 parts per thousand, respectively, showing the typical characteristics of igneous carbonatite. it is generally accepted that carbonatite is produced by low degree partial melting or metasomatism of the mantle source with the characteristics of significant lree-rich distribution pattern. but the carbonatites in shijiawan ii deposit have quite high hree contents and flat ree distribution pattern, which is different from other carbonatites worldwide. this requires that the rock source must be enriched in hrees and depleted in lrees. such characteristics of source are consistent with that of the residual eclogite which evolved through the partial melting of subducted oceanic crust. therefore, we suggest that, when mianlue oceanic crust subducted into the qinling and north china block in triassic period, the magmatic arc formed through metamorphic dehydration and melting processes, then carbonatite magma was produced by low degree partial melting or metasomatism of the residual eclogite in back-are extension area. the processes resulted into the formation of hunglongpu mo deposits associated with carbonatites. therefore, there is still b-type subduction in the qinling at about 220ma, and the continental collision processes are not over yet. |
| WOS关键词 | ISOTOPE GEOCHEMISTRY ; MOLYBDENUM DEPOSIT ; MELT COMPOSITIONS ; TRACE-ELEMENTS ; NORTH CHINA ; MANTLE ; EVOLUTION ; PROVINCE ; EARTH ; PETROGENESIS |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000265945400016 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2404968 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Xu Cheng |
| 作者单位 | 1.Chinese Acad Sci, Inst Geochem, Guiyang 550002, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu Cheng,Song WenLei,Qi Liang,et al. Geochemical characteristics and tectonic setting of ore-bearing carbonatites in hunglongpu mo ore field[J]. Acta petrologica sinica,2009,25(2):422-430. |
| APA | Xu Cheng,Song WenLei,Qi Liang,&Wang LinJun.(2009).Geochemical characteristics and tectonic setting of ore-bearing carbonatites in hunglongpu mo ore field.Acta petrologica sinica,25(2),422-430. |
| MLA | Xu Cheng,et al."Geochemical characteristics and tectonic setting of ore-bearing carbonatites in hunglongpu mo ore field".Acta petrologica sinica 25.2(2009):422-430. |
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来源：中国科学院大学
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