甘肃金川铜镍矿床Ⅰ矿区深部边部地质-地电化学-地球物理多元信息成矿预测

Geological-geoelectrochemical-geophysical multifactor information ore prognosis in the depth and on the edge of NoI mining area of the Jinchuan copper-nickel sulfide ore deposit,Gansu Province

在综合研究分析金川铜镍矿区前人资料的基础上,经现场地质调查、收集地质资料,总结了矿区的成矿规律,有针对性地在Ⅰ矿区的北东侧开展了地质-地球电化学-地球物理多元信息的深部边部成矿预测。根据地电化学数据的统计结果,对矿区元素共生组合和成矿作用、成矿期次等地球化学特征进行了探讨,以此确定了地电化学综合异常;在掌握矿区岩石、矿石物性特征的情况下,通过地球物理勘探推测在Ⅰ号矿体与F1断裂之间存在一隐伏的超基性岩体。最终对矿区进行地质-地电化学-地球物理特征的综合分析,圈定了测区的找矿远景区。

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.