阴极发光显微镜在岩矿鉴定方面的应用

本文重点论述利用美国纽克里得(Nuclide)公司的发光仪,对鄂尔多斯盆地包括国内部分其它沉积盆地沉积岩及火山岩、变质岩的鉴定结果,进而把这些成果与沉积环境、成岩作用、次生变化以及对储层孔隙结构的影响结合起来,以期能对油气田的勘探开发起到指导作用。

APPLICATION OF THE CATHODE LUMINESCENCE MICROSCOPE IN THE MINERAL IDENTIFICATION

As a modern applied techinique the cathode luminescence microscope is widely used in the mineral geology, the Oil field geology, and the semiconductor fields .The texture and comnosition of the polished rock samples can be determined directly at the machine.This method is not only convenient but also quick and accurate as compared with the conventional ways. The structural shape of rocks can be shown by using this method, and the later change process of the rock structure shape can be resumed.The result of lithological research indicaest that the sedimentogeneous rock underwent a very complicated evolutional process from the sedimentary accumulation, the rock formation and the later change to the shallow metamorphism.using the cathode luminescence techiniquc has solved many problems, such as the traceless second cementation,the reconversion of some destroyed textures of the original rock, the organic remained tcxstures,the early corroded hollows, the corroded fissures, the distinction of fissures at various periods, the rchealing of ruptural rocsk, the second change of oopcllcts, and the reconversion of change-remaining textures, etc. Countless facts have proved the results.The cathode luminescence techinique has gained the following gratifying achievements in the Shaanxi-Gansu-Ningxia basin:1.Trace the sources of materials by using of the luminescent feature of quartz to determine the various sources of clastical materials ie the deltas.2. Divide the types of silicious cementation according to the cathode luminescence features to determine the four elementary types, the growth zoning type, the successive growth-embedded type, the much-periodic growth type, and the ruptural rehealing type.3.Distinguish the genesis of carbonate cement, the types of hollows,the genesis of carbonate ring texture, the exchange phenomenon, and the dolomitization in the clastical rocks.4.Evaluate the storage strata and analyse the evolution of the rock formation in the storage strata.