济阳坳陷早古生代方解石脉成因分析

利用电子探针微区定量分析、碳氧同位素质谱分析和岩石包裹体分析3种方法，分析了济阳坳陷早古生代碳酸盐岩脉体形成的原因。利用方解石脉体的化学组分特征和碳氧同位素组分特征判断了其形成的原始环境，通过脉体包裹体特征判别方解石脉形成的温度以及形成的期次。研究表明，济阳坳陷下古生界方解石脉体成因主要以热液沉积为主，其次还受到地表渗入水的影响。

Analysis on origin of calcite vein in Early Palaeozoic of Jiyang Depression

The origin of carbonatite vein in Early Palaeozoic of Jiyang Depression was studied based on quantitative analysis of the electron probe in microarea,mass spectrographic analysis of carbon and oxygen isotope and rock inclusion analysis. It is possible to indicate original environment by the chemical composition of calcite veins and character of the carbon and oxygen isotope. Features of vein - inclusion can judge the forming temperature and the forming period - times of the calcite vein. The result indicates that the origin of calcite veins is related to hydrothermal sediment first and then the infiltration of surface water.