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火山岩为岩浆在高温—速冷(淬火)、低压—脱水(含脱气)、氧化—燃烧等条件下的产物。它与侵入岩形成的环境不同,因此反映在矿物学特征上也不同。研究这些差异,阐呀其原理,无论对火山岩的鉴定,岩相与成因分析,还是对寻找某些与之有关的矿产(Au、Ag、Fe、Cu、Mo等)都有相当重要的意义。作者根据自己的研究,并参考前人和国外的一些资料,总结概括出火山岩矿物学十三个方面的特征,并力求从矿物物理化学角度予以阐述。
Volcanic rocks are products of magma under conditions of high temperature - rapid cooling (quenching), low pressure - dehydration (including degassing), oxidation - combustion. It is different from the environment formed by intrusive rocks and thus reflects the different mineralogical characteristics. To study these differences and elucidate its principles, it is of great importance to identify volcanic rocks, lithofacies and genesis, and find some related minerals (Au, Ag, Fe, Cu, Mo, etc.). According to his own research and some references from foreigners and foreign countries, the author summarizes the characteristics of thirteen aspects of volcanic mineralogy and strives to expound it from the perspective of mineral physics and chemistry.