【摘要】 以苏北盆地高邮凹陷闵桥地区含油玄武岩中的绿泥石为研究对象 ,探讨了其成因和形成温度 ,认为玄武岩中绿泥石有两种形成方式、五条形成途径 :其一为蚀变演化 ,包括 :火山玻璃、斜长石、辉石的蚀变 ,交代橄榄石斑晶 ,以及皂石的进一步演化 ;其二为沉淀结晶 ,包括从热液中直接沉淀生长和胶体溶液充填后的结晶。计算结果显示 ,蚀变演化形成的绿泥石 ,其形成温度为 1 2 8～ 2 71℃ ;沉淀结晶形成的绿泥石 ,其形成温度为 31～63℃。玄武岩中绿泥石形成温度与埋藏深度间没有明显的线性相关。进一步研究表明 ,本区玄武岩作为储油层 ,其进油时的温度为 62～1 1 8℃ ,不超出 4 8～1 37℃。更多还原

【Abstract】 This paper deals with the genesis and formation temperature of chlorite in oil-bearing basalt from the Mingqiao area, Gaoyou depression, northern Jiangsu Province. It is shown that chlorite in the basalt was formed through five formation channels of two genetic ways. The first way is the alteration and evolution of the pre-existing minerals, i.e., alteration of volcanic glass, plagioclase and pyroxene, metasomatism of olivine phenocryst and further evolution of saponite. The second way is the crystallization of the solution, such as crystallization of chlorite directly from the solution or after the filling of colloid solution. The calculated result shows that chlorites were formed at 128-271℃ through the first way, while those at 31-63℃ through the second way. It was also discovered that there was no obvious linear correlation between the formation temperature and the burial depth of chlorite in the basalt. Further studies indicated that, as a reservoir, the oil-filling temperature of the basalt was 62-118℃, less than 48-137℃.更多还原