联合使用扫描电镜、超长焦距连续变焦视频显微镜以及偏光显微镜等微观实验研究仪器设备,并结合相应样品的压汞资料分析,应用孔隙铸模法研究了川南-黔北地区下三叠统嘉陵江组几种代表性碳酸盐岩的孔隙微观结构.孔隙类型主要有残余粒间孔、扩溶粒间孔、粒内溶蚀孔、晶间孔,形状主要有规则近等轴状、三角形或多边形、星点状以及"Y"状等,以片状、弯片状喉道为主.孔隙密集分布的区域呈"斑点"状出现,"斑点"之间缺少喉道连通,彼此呈"孤岛"状出现.不同沉积成岩环境中形成的岩石孔隙结构具有明显差异.

Combined the equipments of microanalysis experiment as SEM, super-long focused microscope and polarizing microscope with the data from mercury injection of the samples, the method of pore mold is used in the observation of porosity microtexture of several typical Lower Triassic Jialingjiang carbonate rocks in Xishui, Guizhou province and in Luzhou, Sichuan province. It is shown that the types of pores mostly are residual intergranular pores, spreading intergranular pores, intragranular dissolved pores, intercrystalline pores and so on. The shapes of pores mainly are ruled near-equiaxial, triangular or polygon, asterion, Y-shaped and so on. The throats are mainly flak and flake curved. Pores distribute as spots in some dense areas in samples and connecting throats are lack from each other among these spots. Obvious difference of porosity microtexture in dissimilar rocks implies different sedimentary environments.