Electron microprobe analyses of altered Th-rich britholite-(Ce) from the Saima alkali complex, North China
文献类型：期刊论文
| 作者 | Yang, ZM; Smith, M; Henderson, P; Le Bas, MJ; Tao, KJ; Zhang, PS |
| 刊名 | NEUES JAHRBUCH FUR MINERALOGIE-MONATSHEFTE
 |
| 出版日期 | 1999-10-01 |
| 期号 | 10页码:453-467 |
| 关键词 | britholite REE-Ca-Th chemical composition zoning pattern |
| ISSN号 | 0028-3649 |
| 文献子类 | Article |
| 英文摘要 | The Ca-rich analogue of britholite-(Ce) (fenghuanglite) from melanite-urtite of the Saima alkali complex, Liaoning Province, China, was reinvestigated by electron microprobe analyses. Two alteration patterns were observed: a spotted zoning and continuous zoning. Weight loss due to metamictisation ranges from 7 to 11 wt.%. The thorium content is unusually high ranging from 5.80 to 26.19 %. In the continuous zoning samples SiO2 and ThO2 are high, and PO4, CaO and REE2O3 are low relative to the spotted zoning samples. The content of Ca shows a negative correlation with Th. From the spotted zoning samples to the continuous zoning samples A-site vacancies and fourvalent cations increase, divalent and trivalent cations decrease, X-site vacancies increase, and F and O decrease. The main changes in britholite during the alteration processes can be described as: 2P(5+) + 2REE(3+) + 4Ca(2+) = 2Si(4+) + 4Th(4+) + 2 square 3.3 H+ + 7.2H(2)O + (A(10)Si(5.2)P(0.6)Ti(0.1)Al(0.1)O(24)F(2))(bss) = 1.9A(aq) + 0.7HF(aq) + (A(8.1)Si(5.2)P(0.6)Ti(0.1)Al(0.1)O(22.7)F(1.3). 8.5H(2)O)(bss) The species previously identified as "fenghuanglite" is proved to be a britholite solid solution series involving (REE, Ca, Th). In this series most samples are characterized by the: predominant REE atoms and can be determined as Th-rich britholite -(Ce). |
| WOS关键词 | PYROCHLORE GROUP MINERALS ; GEOCHEMICAL ALTERATION ; CRYSTAL-STRUCTURES ; SUBGROUP |
| WOS研究方向 | Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000083607600002 |
| 出版者 | E SCHWEIZERBARTSCHE VERLAGS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/75368]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Yang, ZM |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Nat Hist Museum, Dept Mineral, London SW7 5BD, England 3.Univ Southampton, Dept Geol, Southampton Oceanog Ctr, Southampton SO14 3ZH, Hants, England |
| 推荐引用方式 GB/T 7714 | Yang, ZM,Smith, M,Henderson, P,et al. Electron microprobe analyses of altered Th-rich britholite-(Ce) from the Saima alkali complex, North China[J]. NEUES JAHRBUCH FUR MINERALOGIE-MONATSHEFTE,1999(10):453-467. |
| APA | Yang, ZM,Smith, M,Henderson, P,Le Bas, MJ,Tao, KJ,&Zhang, PS.(1999).Electron microprobe analyses of altered Th-rich britholite-(Ce) from the Saima alkali complex, North China.NEUES JAHRBUCH FUR MINERALOGIE-MONATSHEFTE(10),453-467. |
| MLA | Yang, ZM,et al."Electron microprobe analyses of altered Th-rich britholite-(Ce) from the Saima alkali complex, North China".NEUES JAHRBUCH FUR MINERALOGIE-MONATSHEFTE .10(1999):453-467. |
入库方式： OAI收割
来源：地质与地球物理研究所
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