Methods for mineral resources assessment based on GIS in Gejiu

Gejiu Tin District is an old mine with a long exploitation history, but its resource is nearly used up at present. The research in mineral resources assessment based on GIS plays a more important and particular role in development of Gejiu. Now mineral resources assessment has been guided by new theories. It makes full use of a large information data of geology, geophysics, geochemistry and remote sensing, which are obtained from current geology exploration, in order to carry out integration mineral analysis, assessment, and to research into the data farther in high levels. At present, the processing of data by computer technique has become more powerful, because GIS was developed in recent years. Particularly, GIS has opened up vast prospects for integrated processing of geoscience data and prognosis of ore resources. GIS can analyze, extract mineral information, quantitatively assess mineral resources, delineate tractes, construct variables, carry out prospecting targets selection and so on.