矿物组合的热力学分析

Thermodynamical analysis of mineral assemblages

人们在对地质体进行物质成份研究的实践中早已认识到,矿物作为地质体的较小单元,是按共生组合的形式规律性地存在于岩石及矿石里。某种矿物,在类型不同成分互异的地质体中有不同的组合;在不同地区而类型相同的地质产物里,与之组合的矿物差别很大,所构成的共生组合多种多样;即使在同一矿床,对于不同世代的该矿物来说,与之组合的矿物也存在明显的差异。

The mentioned calciometasomatical production formed from magnesioskarns consists of harkerite, monticellite, salite-augite, grossular, gehlenite, vesuvianite and so on. It was sediment at favourable section of the various rocks of the magnesioskarns by the certain law. Formation of these mineral derived from series of mutual reaction between the skarns minerals and the components of thermal solution, and it was at the expense of special paragenesis of original minerals. The six minerals are associated each other by certain paragenesis, and its interrelation may be expressing by the triangular chemography in the ternary system A12O3-SiO2-CaO. They make up a multisystem of six phases in the ternary system and have singular determinated topological type. The mentioned mineral assemblages are relate to geochemical behaviour of the iron and magnesium in the thermal solution. The chemical potential of the two components is determinate regularity of replacement of the mineral assemblages.