Construction of an expert system for igneous petrology

建立了火成岩岩石学专家系统。我们可以根据地球化学资料用这个系统来区分每一块岩石。本系统由以下子程序组成：对各种文件进行控制和管理的集成部分，对数据进行系统维护和控制的数据库部分，必要时显示图形和区分数据的图形部分，将原始数据或辅助数据在地图上显示的数据映射部分，以及利用这些数据进行各种数据处理和模型计算的数据处理部分。在此基础上，建立了摄像机和摄像机拍摄的岩石纹理和结构的判别系统。根据地球化学资料的特点，有必要建立火成岩数据库，以区分所属群和各岩群的成因。通过XRF、光子活化、ICP-MS等分析方法，建立了火成岩主微量元素分析数据数据库。分析的火成岩样品来自本州弧东北部的新近系火山岩、本州中部的第四纪火山岩、本州弧东北部的索拉奇群的白垩系火山岩、本州弧中部的古近系石曼托群的火山岩以及墨西哥火山带的第四纪火山岩。然后，利用该系统对各类火成岩进行了判别工作，并发表了部分结果。

An expert system for the igneous petrology was constructed. We can discriminate each rock by this system based on the geochemical data. This system is composed of subprograms as follows ; the integrated part where various files are controlled and are managed, the data base part where the data are maintained and controlled systematically, the graphics part to display graph if necessary and to discriminate the data, the data mapping part where the original data or the secondary data are displayd on map, and, the data processing part where various data processings and the model calculations are done by using these data. Also, the discrimination system for the textures and the structures of the rocks taken by using the camera and the video camera was constructed.It is necessary to construct the data base of igneous rockes for the discrimination of the belonging group and the origin of the each rock group based on the characteristic of the geochemical data. We made a data base for the analytical data of major and trace elements of igneous rockes which we have analyzed by XRF,photon activation, and ICP-MS.The analyzed samples are various igneous rocks collected from various places such as Neogene volcanic rocks from Northeast Honshu arc, the Quaternary volcanic rocks from Central Honshu, and the Cretaceous volcanic rocks from ther Sorachi group, volcanic rocks of Paleogene Shimanto group, and the Quaternary volcanic rocks from the Mexican volcanic belt. Then, the discrimination works were done by using this system about those various igneous rocks, and a part of the results was published.