| 交代作用体系的一些热力学性质研究 |
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| 引用本文：梁祥济.1992.交代作用体系的一些热力学性质研究[J].地球学报,13(1):85-95. |
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| 中文摘要:近年来,作者对水热交代形成的岩石及其铁、金和银矿床进行了一系列的高温高压实验和相平衡的热力学性质的研究。实验过程中交代反应的热力学计算是应用经典和经验公式进行。对实验矿物稳定性和相关系,根据吉布斯f=C+2-P的相律公式,利用Schreine-makas方法作拓扑学图,从而获得了交代岩及其铁、金和银矿床形成的物理化学条件,揭示了交代作用体系的一些热力学性质、特征和成岩成矿的机理。 |
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| THE STUDY ON SOME THERMODYNAMIC PROPERTIES IN METASOMATISM SYSTEM |
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| Abstract:Metasomatism is a general geological phenomenon in the lithosphere. The various metasomatism developed during magmatism, volcanism, sedimentation and metamorphism, and was followed by the formation of the rocks and mineral deposits of distinct types.In recent years, we carried out a series of the experiments under high temperatures and high presseres and the thermodynamic study of the phase equilibrium about the rocks and Fe, Au, Ag deposits formed by hydrother-mal metasomatism, and got a lot of the paramenters of physicochemical conditions about their formation: t = 150-700℃, PH2O= (30-140)MPa, logfo2= -54.892-3.677, PCO2= (0.06-70) MPa, pH = 2.0-13.0,Eh = 1.09--1.15V.The aqueous solutions of K, Na halogenides are the extraction agents and carriers of iron, gold and silver. The paragenetic asociation of the minerals and metasomatic zones in metasomaiic rocks are dependented on the main chemical compositions SiO2, AI2O3, FeO, Fe2O3, CaO, MgO and the chemical potentials (μ) of relatively active ingredients of CO2, (Fe, Mg)O, H2O in original rocks, and the paragenetic association regularly change along with the (μ).These results corresponded with the geological facts in field, and reveal some thermodynamic properties and the rock-forming and mineral-forming mechanism in the metasomatism. |
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