| 白云鄂博的碳锶铈矿 |
| |
| 引用本文： | 毛骞,马玉光,王凯怡.白云鄂博的碳锶铈矿[J].地质学报,2012,86(5):837-841. |
| |
| 作者姓名： | 毛骞 马玉光 王凯怡 |
| |
| 作者单位： | 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室,北京,100029 |
| |
| 基金项目： | 本文为中国科学院地质与地球物理研究所实验技术创新基金（编号ZC0803）项目资助成果。 |
| |
| 摘 要： | 在对白云鄂博碳酸岩中稀土矿物的研究中,发现了锶-稀土含水复碳酸盐矿物。根据电子探针分析结果,其化学成分相当于碳锶铈矿(Ancylite-Ce)、钙碳锶铈矿(Calcioancylite),前者Sr>Ca,后者Ca>Sr。计算得到的化学式分别为:(Sr0.62,Ca0.18)0.8(Ce0.5,Nd0.36,La0.17,Pr0.02,Sm0.02)1.2(CO3)2(OH1.04,F0.14)1.2H2O、(Ca0.73,Sr0.28,Ba0.17)1.2(Ce0.46,Nd0.15,La0.15,Pr0.04,Sm0.01)0.8(CO3)2(OH0.75,F0.06)0.8H2O,简化为:(Sr,Ca)2-xCex(CO3)2.(OH,F)2-x.H2O,接近理论化学式(Sr,Ca)Ce(CO3)2(OH)H2O,但附加阴离子除OH—外,还含有少量F-。两者均为几微米至十几微米的微小晶体,呈浸染状产出,且仅见于晚期方解石或方解石—白云石交生体中。
|
| 关 键 词： | 碳锶铈矿 白云鄂博 稀土矿物 碳酸岩 |
| 收稿时间： | 2011/11/22 0:00:00 |
| 修稿时间： | 2012/3/22 0:00:00 |
Ancylite at the Bayan Obo REE-Fe-Nb Deposit |
| |
| MAO Qian,MA Yuguang and WANG Kaiyi.Ancylite at the Bayan Obo REE-Fe-Nb Deposit[J].Acta Geologica Sinica,2012,86(5):837-841. |
| |
| Authors: | MAO Qian MA Yuguang and WANG Kaiyi |
| |
| Institution: | State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 |
| |
| Abstract: | Ancylte in carbonatite of the east contact zone at Bayan Obo REE-Fe-Nb deposit, Inner Mongolia, China, is distinguished and analyzed for the first time. Compositionally, two subtypes of ancylite are identified as ancylite-(Ce) and calcioancylite-(Ce), with chemical formula of respectively: (Sr0.62,Ca0.18)0.8(Ce0.5,Nd0.36,La0.17,Pr0.02,Sm0.02)1.2(CO3)2(OH1.04,F0.14)1.2H2O (Ca0.73, Sr0.28,Ba0.17)1.2(Ce0.46,Nd0.15,La0.15,Pr0.04,Sm0.01)0.8(CO3)2(OH0.75,F0.06)0.8H2O which can be simplized as (Sr,Ca)2-x Cex (CO3) 2·(OH,F) 2-x·H2O.The carbonatite samples with ancylite are mainly composed of dolomite with calcite less than 10 persent. Ancylite disseminated within calcite or intergrowth of calcite and Ca rich dolomite, was not observed in main dolomite. |
| |
| Keywords: | ancylite REE minerals Carbonatite Bayan Obo |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《地质学报》浏览原始摘要信息 |
| 点击此处可从《地质学报》下载免费的PDF全文 |
|
