Experimental study of trace element distribution between calcite, fluorite and carbonatitic melt in the system CaCO3+CaF2+Na2CO3 +/- Ca-3(PO4)(2) at 100MPa

Chebotarev Dmitry A.; Veksler Ilya V.; Wohlgemuth-Ueberwasser Cora; Doroshkevich Anna G.; Koch-Mueller Monika

首页> 外文期刊>Contributions to Mineralogy and Petrology >Experimental study of trace element distribution between calcite, fluorite and carbonatitic melt in the system CaCO3+CaF2+Na2CO3 +/- Ca-3(PO4)(2) at 100MPa

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Experimental study of trace element distribution between calcite, fluorite and carbonatitic melt in the system CaCO3+CaF2+Na2CO3 +/- Ca-3(PO4)(2) at 100MPa

机译：在100MPa的系统CaCO3 + CaF2 + Na 2 CO 3 +/-CA-3（PO4）（2）中CaCo3 + CaF2 + Na 2 CO 3 +/-CA-3（PO4）（2）的痕量元素分布的实验研究

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Here we present an experimental study of the distribution of a broad range of trace elements between carbonatite melt, calcite and fluorite. The experiments were performed in the CaCO3+CaF2+Na2CO3 +/- Ca-3(PO4)(2) synthetic system at 650-900 degrees C and 100MPa using rapid-quench cold-seal pressure vessels. Starting mixtures were composed of reagent-grade oxides, carbonates, Ca-3(PO4)(2) and CaF2 doped with 1 wt% REE-HFSE mixture. The results show that the distribution coefficients of all the analyzed trace elements for calcite and fluorite are below 1, with the highest values observed for Sr (0.48-0.8 for calcite and 0.14-0.3 for fluorite) and Y (0.18-0.3). The partition coefficients of REE gradually increase with increasing atomic number from La to Lu. The solubility of Zr, Hf, Nb and Ta in the synthetic F-rich carbonatitic melts, which were used in our experiments, is low and limited by crystallization of baddeleyite and Nb-bearing perovskite.

机译：在这里，我们提出了一种实验研究，对碳酸盐石熔体，方解石和萤石之间的广泛微量元素分布的实验研究。使用快速淬火冷密封压力容器，在650-900摄氏度和100MPa的CaCO 3 + CaF2 + Na 2 CO 3 +/-Ca-3（PO4）（2）合成系统中进行实验。起始混合物由试剂级氧化物，碳酸盐，Ca-3（PO4）（2）和CaF2组成，掺杂有1wt％的REE-HFSE混合物。结果表明，方解石和萤石的所有分析的痕量元素的分布系数低于1，对Sr的最高值（方解石的0.48-0.8，萤石的0.14-0.3）和Y（0.18-0.3）。 REE的分区系数随着从LA到Lu的增加而逐渐增加。 Zr，Hf，Nb和Ta在我们实验中使用的合成F富含金酰胺熔体中的溶解度低，并通过Baddeleyite和Nb携带的钙钛矿结晶而受到限制。

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来源
《Contributions to Mineralogy and Petrology》 |2019年第1期|共13页
作者
Chebotarev Dmitry A.; Veksler Ilya V.; Wohlgemuth-Ueberwasser Cora; Doroshkevich Anna G.; Koch-Mueller Monika;
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作者单位

Russian Acad Sci VS Sobolev Inst Geol &

Mineral Siberian Branch Koptyuga Pr 3 Novosibirsk 630090 Russia;

Russian Acad Sci VS Sobolev Inst Geol &

Mineral Siberian Branch Koptyuga Pr 3 Novosibirsk 630090 Russia;

GFZ German Res Ctr Geosci Telegrafenberg D-14473 Potsdam Germany;

Russian Acad Sci VS Sobolev Inst Geol &

Mineral Siberian Branch Koptyuga Pr 3 Novosibirsk 630090 Russia;

GFZ German Res Ctr Geosci Telegrafenberg D-14473 Potsdam Germany;

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正文语种 eng
中图分类矿物学;岩石学;
关键词
Carbonatites; Distribution coefficients; Trace elements; Partitioning; Fluorite; Calcite;

机译：CarbonAtites;分配系数;微量元素;分区;萤石;方解石;

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机译：在100MPa的系统CaCO3 + CaF2 + Na 2 CO 3 +/-CA-3（PO4）（2）中CaCo3 + CaF2 + Na 2 CO 3 +/-CA-3（PO4）（2）的痕量元素分布的实验研究
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Experimental study of trace element distribution between calcite, fluorite and carbonatitic melt in the system CaCO3+CaF2+Na2CO3 +/- Ca-3(PO4)(2) at 100MPa

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