首页> 外文期刊>Contributions to Mineralogy and Petrology >Evidence for lithium-aluminosilicate supersaturation of pegmatite-forming melts
【24h】

Evidence for lithium-aluminosilicate supersaturation of pegmatite-forming melts

机译:伟晶石形成熔体的锂铝硅酸盐过饱和的证据

获取原文
获取原文并翻译 | 示例
           

摘要

New experimental data on the solubility of lithium (Li) at spodumene (LiAlSi2O6) and petalite (LiAlSi4O10) saturation at 500 MPa and 550-750 degrees C reveal evidence for lithium supersaturation of pegmatite-forming melts before the formation of Li-aluminosilicates. The degree of Li enrichment in granitic melts can reach similar to 11,000 ppm above the saturation value before the crystallization of Li-aluminosilicate minerals at lower temperatures. Comparison of the experimental results with the spodumene- rich Moblan pegmatite (Quebec) is consistent with extreme Li enrichment of the pegmatite-forming melt prior to emplacement, which cannot be explained with equilibrium crystallization of Li-aluminosilicates from a common granitic melt. The results of this study support the model of disequilibrium fractional crystallization through liquidus undercooling as the most plausible mechanism for the generation of such Li-rich ore resources.
机译:关于锂(Li)在锂辉石(LiAlSi2O6)和蓬松石(LiAlSi4O10)饱和度在500 MPa和550-750摄氏度下的溶解度的新实验数据揭示了在形成锂铝硅酸盐之前,伟晶岩形成熔体的锂过饱和的证据。在较低温度下锂铝硅酸盐矿物结晶之前,花岗岩熔体中的锂富集程度可以达到比饱和值高出约11,000 ppm的程度。将实验结果与富含锂辉石的Moblan伟晶岩(魁北克)进行比较,与就位前形成伟晶岩的熔体中的极端Li富集是一致的,这不能用普通的花岗岩熔体中的Li-铝硅酸盐的平衡结晶来解释。这项研究的结果支持通过液相线过冷进行不平衡分级结晶的模型,这是产生这种富含锂的矿石资源的最合理的机制。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号