摘要
从白云石矿物的分子结构入手 ,通过X -射线衍射分析 ,采用“有序度”的概念来描述白云石中Ca离子和Mg离子的排列情况 ,探讨在不同的成岩作用下和不同的白云化模式中白云石在分子结构上发生的变化 ;通过对X -射线衍射谱图的分析 ,计算出Ca离子和Mg离子的mol分数 ,鉴别出铁白云石和含铁白云石 ,为研究成岩作用和白云化模式提供实验依据。X -射线衍射也可进一步分析地层中的石膏 ,为探讨地层“去膏化”过程 。
Starting from molecular structure of dolomite mineral, through analysis of X-ray diffraction, adopting the concept of “Sequentiality” to describe the arrangement of Ca and Mg ions in dolomite, the change of dolomite molecular structure taken place under different diageneses and in different dolomitization models is approached. By analysis to X-ray diffraction spectrum, computing out the mole factions of Ca and Mg ions, distinguishing out ankerite and ferrodolomite, for studying the diagenesis and dolomitization model, the experiment basis is provided. The X-ray diffraction may further analyze gypsum in stratum for approaching the process of “degypsification” and the research of formation fractures, informations are supplied.
出处
《天然气勘探与开发》
2004年第4期64-66,72,共4页
Natural Gas Exploration and Development
