Geological-geoelectrochemical-geophysical multifactor information ore prognosis in the depth and on the edge of No. I mining area of the Jinchuan copper-nickel sulfide ore deposit, Gansu Province

Based on an analysis of available data, the authors made field geological investigation, collected geological data and summed up the metallogenic regularity in Jinchuan copper-nickel sulfide ore deposit. Multifactor information geological-geoelectrochemical-geophysical ore-prospecting work was carried out on the northeast side of No.Ⅰmining area. According to statistics of geoelectrochemical data, the authors investigated the biogeochemical characteristics of the mining area in such aspects as element association, mineralization and metallogenic stages, and then delineated the geoelectrochemical comprehensive anomaly. With the understanding of physical characters of rocks and ores, the authors inferred that there exist a concealed ultrabasic rock mass between No.Ⅰmining area and F1 fault based on geophysical prospecting. On the basis of a geological-geoelectrochemical-geophysical integrated analysis, the promising targets were delineated in the study area.