The Construction Of Geo-Spatial Database And Delineation Of Target About Xunyang

With the development of information technology, mineral exploration has been into digital, quantitative study of the new stage. Geographic Information Systems GIS, as the product of more interdisciplinary, can be efficient management, analysis and output of information with spatial structure. Thus, with GIS technology continues to mature, it has been widely used in the study of the many directions, and plays an important role in Mineralization forecast and evaluation.To MAPGIS as a platform, on the basis of the wild-spot inspection, combining with geological conditions and geological background of the area, firstly ,this paper coordinates, concludes and analyses the Xunyang geological map and the geological data involved, and divides layers according to the characteristics (properties ) of geological entities, and digitals graphics after the error correction, the ratio of geological changing and the choice of content, constitutes a 1:50 000 geological graphics database of study area; then abstracts entities (attribute) of different layers of the geological characteristics based on relations data model, establishes a database of attributes related to graphics. It will also increase Xunyang geochemistry map after digital and error correction, so, such as graphics geological database, attributes database and geochemical database builds up the spatial database.On the basis of spatial database, using spatial analysis functions of MAPGIS, this paper has accomplished multi-element and multi-level spatial superimposition analysis, and researched the relations of the mineral and integrated information about geological and geochemical, summed up the deposit prospecting signs, formed a study area Mineralization forecast spatial analysis model, designed of the prospecting target.On the basis of superpositions between deposit(point) and the fault, rock formation, and comprehensive abnormal, this paper determines the signs coefficient of the prospecting and extracts mineralization fault fovorable unit. According to the rock formation and geological structural characteristics, regional geochemical anomalies, such as multi-source information of study area, learning comprehensive information extraction and prospecting information on the region have found the mine, based on area to area superimposition analysis in the designing of the favorable mineralization, five exploration target have been determined : the Heishanwan Pb-Zn target, the north of Huopenya Pb-Zn target, the west of Miaozuzi Barium target, the east of Dingjiawan Barium target, the Jinhekou Zn-Ba target.