Genesis of nelsonite from the damiao fe-ti-p deposit, hebei province, china: evidence from apatite
文献类型：期刊论文
| 作者 | Chen Wei1,2; Zhao TaiPing1; Wei QingGuo1,2; Xu YongHang1,2 |
| 刊名 | Acta petrologica sinica
 |
| 出版日期 | 2008-10-01 |
| 卷号 | 24期号:10页码:2301-2312 |
| 关键词 | Anorthosite Nelsonite Damiao massif Fe-ti-p deposit Immiscibility Fractional crystallization Accumulation |
| ISSN号 | 1000-0569 |
| 通讯作者 | Chen wei(chenweify1@163.com) |
| 英文摘要 | Nelsonites, which consist essentially of fe-ti oxides and apatite, are spatially and temporally associated with proterozoic inassif-type anorthosites, and have been interpreted as either cumulate rocks or the products of immiscible melts. the damiao anorthosite massif in hebei province in china, contains numerous disseminated and vein-type fe-ti oxide and apatite orebodies. the disseminated ores are hosted in homogeneous silicate rocks, whereas the vein-like bodies occur as veins, lenses and rhythmic layers of massive fe-ti oxides +/- apatite that are in sharp contact with the host anorthosite or norite. here we provide new trace element data on individual apatite crystals and whole-rock samples of the host nelsonites of the damiao anoribosite massif and use these data to investigate the mechanism of apatite accumulation in these rocks. apatites in all analyzed nelsonites from damiao are enriched in re e relative to the whole-rock samples by factors of 2.96 to 6.93, but both have parallel chondrite-normalized ree patterns. mass-balance calculations (theoretical calculated curve r proportional to 1/f) confirms that the whole-rock ree concentrations of nelsonites are nearly 100% controlled by the apatite. this finding strongly suggests that the apatites are cumulus minerals, because if the nelsonites were derived from an immiscible liquid, the apatite d(ree) value (ratio of ree in apatite and whole-rock) would not show such large variations. calculated melts in equilibrium with the cumulus apatite, have right-dip chrondrite-normalized ree, patterns with small negative eu and ce anorrialies and (yb/lu)(s) < 1. these melts are similar in composition to the disseminated fe-p ores in damiao, suggesting that the disseminated ores rnay represent the parental magma. this interpretation is supported by the fact that the nelsonites are usually associated with disseminated fe-p ores, and by the similarity of the apatite and whole-rock ree patterns. |
| WOS关键词 | RICH ROCKS ; NEW-YORK ; ANORTHOSITE ; NORWAY ; OXIDE ; PETROGENESIS ; ORIGIN ; QUEBEC ; SUITE |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000262520800011 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2386759 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Chen Wei |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen Wei,Zhao TaiPing,Wei QingGuo,et al. Genesis of nelsonite from the damiao fe-ti-p deposit, hebei province, china: evidence from apatite[J]. Acta petrologica sinica,2008,24(10):2301-2312. |
| APA | Chen Wei,Zhao TaiPing,Wei QingGuo,&Xu YongHang.(2008).Genesis of nelsonite from the damiao fe-ti-p deposit, hebei province, china: evidence from apatite.Acta petrologica sinica,24(10),2301-2312. |
| MLA | Chen Wei,et al."Genesis of nelsonite from the damiao fe-ti-p deposit, hebei province, china: evidence from apatite".Acta petrologica sinica 24.10(2008):2301-2312. |
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来源：中国科学院大学
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