焦家金成矿带三维成矿条件分析与成矿预测

分析了山东焦家金成矿带大中型典型矿床地质特征和控矿地质条件，建立了该地区的找矿地质模型，总结了区内控矿地质条件和找矿标志在深部的变化规律，采用Surpac软件对岩体、已知矿体、物化探异常等进行了三维实体建模。在此基础上，首先采用立方体预测模型法对三维实体模型进行空间分割，并根据建立的找矿地质模型，将所确定的预测参数作为属性值赋给每一个立方体单元块，建立数字找矿模型；然后对研究区地质、地球物理、地球化学的13个预测变量进行三维成矿有利条件分析与提取，采用三维信息法计算各预测变量的信息量，寻找成矿有利组合的空间部位，并结合研究区内实际地质情况、已有见矿工程分布等因素圈定了6处找矿靶区；最后采用体积估计法计算得到该6处找矿靶区的总资源量为382.482 8 t。上述研究成果对于区内的找矿工作具有一定的参考价值。

Metallogenic Prediction and Analysis of the Three-dimensional Metallogenic Conditions of Jiaojia Gold Ore Belt

The geological prospecting model of Jiaojia gold ore belt is established by analyzing the geological characteristics and ore-controlling conditions of the large and medium-sized typical ore deposits in Jiaojia gold ore belt，Shandong province.The geological ore-controlling conditions and the change rule of prospecting criteria in the deep are summarized.The three-dimensional geological solid model of rock mass，the known orebody and geophysical anomalies are obtained by utilizing Surpac software.Based on the above analysis results，firstly，the three-dimensional solid model is divided into small cubes by adopting the cubic predicting model.Combing with the geological prospecting model，the identified prediction parameters are regarded as attribute values assigned to each cube of the three-dimensional solid model so as to establish the digital prospecting model; then，the three-dimensional metallogenic favorable conditions are analyzed and extracted from the 13 prediction variables of geological，geophysical and geochemical of the research area，and the information quantity values of the 13 prediction variables are calculated by using the three-dimensional information method to look for the space parts of the mineralization favorable combinations.Besides that，6 prospecting target areas are delineated on the basis of the information such as actual geological conditions，distributions of the existing mine engineering and so on; finally，the total mineral resources of 6 prospecting target areas are obtained as 382.482 8 t by adopting the volume estimating method.The above analysis results can provide some reference for the prospecting work in this research area.