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富锂氟花岗岩中存在岩浆成因铁/锂白云母的实验证据
Experimental evidence for presence of magmatic Fe and Li muscovite in the Li F rich granite
【摘要】 通过花岗岩-HF-H2O体系的熔化-结晶实验,在570~700℃、100MPa条件下获得了与淬火玻璃共存的石英+碱性长石+云母+萤石的矿物组合。电子探针分析结果表明,实验产物中除黑云母外,还有一部分为铁白云母和锂白云母,这说明浅色云母可以形成于岩浆条件,同时为自然界中存在岩浆成因锂白云母花岗岩和二云母花岗岩提供了新的实验证据。
【Abstract】 A mineral assemblage of quartz +alkali feldspar +mica +fluorite, coexisting with melt phase, is obtained in the melting crystallization experiments above solidus in the F rich granite HF H2O system at 570~700℃and 100 MPa. Analytical results by electron microprobe indicate that parts of mica in the run products are Fe muscovite and Li muscovite, besides biotite. The results suggest that Fe and Li muscovite can be formed under magmatic condition, which provides a new evidence for magmatic genesis of Li muscovite granite and two mica granite.
【Key words】 Fe muscovite; Li muscovite; magmatic origin; melting crystallization experiments; Li F rich granite;
- 【文献出处】 地球化学 ,Geochimica , 编辑部邮箱 ,2003年01期
- 【分类号】P575
- 【被引频次】10
- 【下载频次】229