Origin of Li-F-rich granite: Evidence from high P-T experiments
文献类型：期刊论文
| 作者 | Li, FC; Zhu, JC; Rao, B; Jin, ZD; Zhang, LS |
| 刊名 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| 出版日期 | 2004 |
| 卷号 | 47期号:7页码:639-650 |
| 关键词 | fluorite lithium muscovite ferromuscovite cassiterite melt evolution Li-F-rich granite high P-T experiment |
| ISSN号 | 1006-9313 |
| 英文摘要 | Though magmatic origin of Li-F-rich granite has been supported effectively by the existence of volcanic and subvolcanic rocks and melt inclusions trapped in them with similar chemical compositions, evidence from high T-P experiments is poor up to now. To simulate the evolution process of Li-F-rich granite and to interpret its forming mechanism, a series of melting-crystallization experiments were carried out. Under the conditions of 1 x 10(8) Pa and 570-700degreesC, a magmatic mineral association of quartz + alkali feldspar + lithium muscovite/ferromuscovite +/- fluorite +/- cassiterite is found in leucogranite-HF-H2O system. This indicates the following points: (i) Fluorite, light-colored muscovite and cassiterite can crystallize directly from the Li-F-rich granitic melt. (ii) The coexistence of dark-colored micas (e.g. biotite) and light-colored micas (e.g. lithium muscovite and ferromuscovite) suggests that the muscovite granite and two-mica granite can be formed under magmatic condition. The zonal texture of micas is not the sole feature for the micas of hydrothermal origin. (iii) As crystallization proceeds, the SiO2 concentration of the residual melt decreases, while the Al2O3 and F concentrations and A/CNK, NKA/Si ratios of the melt incerese, favoring the formation of Li-F-rich granites. Our experiment results are well consistent with the vertical zonation widely observed in rare metal bearing granites, and therefore provide strong experimental evidence for magmatic origin of Li-F-rich granite. |
| 公开日期 | 2012-03-06 |
| 源URL | [http://159.226.73.51/handle/332005/2717]  |
| 专题 | 南京地理与湖泊研究所_湖泊室 |
| 推荐引用方式 GB/T 7714 | Li, FC,Zhu, JC,Rao, B,et al. Origin of Li-F-rich granite: Evidence from high P-T experiments[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2004,47(7):639-650. |
| APA | Li, FC,Zhu, JC,Rao, B,Jin, ZD,&Zhang, LS.(2004).Origin of Li-F-rich granite: Evidence from high P-T experiments.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,47(7),639-650. |
| MLA | Li, FC,et al."Origin of Li-F-rich granite: Evidence from high P-T experiments".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 47.7(2004):639-650. |
入库方式： OAI收割
来源：南京地理与湖泊研究所
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