岩浆黑云母和热液黑云母矿物化学研究进展

Progress in study of mineral chemistry of magmatic and hydrothermal biotites

黑云母是岩浆岩和斑岩型矿床中重要的含水铁镁质成岩硅酸盐矿物。黑云母化学成分可以有效地指示岩浆性质、热液蚀变以及成矿过程。文章基于前人和作者的研究成果,系统地总结了黑云母矿物化学在黑云母分类、地质温度计、地质压力计、氧逸度等方面的应用,对岩石成因及构造背景的指示意义,卤素和卤素逸度评价岩浆热液过程,成矿潜力评价等方面的研究新进展,为斑岩型铜多金属矿床的成矿预测和勘查评价提供了最新的找矿矿物学证据。并提出了黑云母矿物化学在研究中存在的一些问题及未来的研究方向。

Biotite is an important hydrated ferromagnesian silicate mineral in most magmatic rock. Its composition is useful in understanding magmatic properties,hydrothermal alteration and ore-forming processes. Based on the research results of previous researchers and the authors,this paper systematically summarizes chemistry application of biotite mineral in such aspects as classification,geothermometer,geothermobarometry and oxygen fugacity,its indicating significance for petrogenesis and tectonic setting,the halogen and halogen fugacity ratios evaluating magmatic hydrothermal process,and the exploration evaluation. These data provide the latest mineralogical evidence for metallogenic prediction and prospecting evaluation of porphyry Cu polymetallic deposits. This paper also analyzes some problems in the study and points out the work that needs to be done in this area in future.