Application of GISto Geo-anomaly-Based Delineation of Mineral Resources

查看全文 作　　者：Chi Shundu Zhao Pengda Li Jianwei The Open Laboratory of Quantitative Prediction and Exploration Assessment of Mineral Resources, Ministry of Land and Resources, Wuhan 430074 出　　处：《Journal of Earth Science》索引2000年第19卷第2期,共4页 摘　　要：In this paper, the Dongchuan type copper deposits are taken as an example to illustrate the application of GIS to the geo anomaly based delineation of mineral resources. The following eight steps are listed in this paper to delineate the permissive and preferable ore finding areas: (1) the analysis of favorable prospecting index using linear and planar geo anomalies; (2) the analysis of favorable prospecting index using combined anomalies; (3) the construction of a GIS based spatial model for mineral prognosis; (4) the delineation of the permissive ore finding area; (5) the determination of the synthetic anomalies and numerical range for the prediction of the favorable prospecting areas, and the determination of the weights of these two variables; (6) the superimposition of all the selected anomalies and the construction of the superimposition map; (7) the determination of unifying criterion of favorable prospective areas at various levels, and (8) the delineation of favorable prospective areas. Finally, this paper offers a detailed discussion of the results in the forecasting of Dongchuan type copper deposits. 关 键 词：GEOGRAPHIC information system (GIS) MINERAL exploration MINERAL prognosis GEO ANOMALY copper deposit.