黑龙江某铜矿地质特征及深部三维可视化成矿预测

Geological Characteristics and Deep Three-dimensional Visualization Metallogenic Prediction of a Copper Mine in Heilongjiang Province

资源危机矿山深边部仍然具有相当大的找矿潜力,但深部矿体找矿存在较大困难和风险。以黑龙江某铜矿为例,在搜集矿区地质数据的基础上,结合场分析理论,提出了"地质数据集成和成矿规律分析—三维地质建模和成矿信息提取—深部矿体定位和预测"的研究思路,通过构建深部矿体三维可视化成矿预测模型,圈定了找矿靶区,并对矿区深部的成矿潜力进行了评价。研究表明:(1)三道湾铜矿床均分布于新屋里岩体的接触带上或靠近接触带部位,矿床沿岩性接触带等间距分布,由矿田南西往北东方向延伸;(2)以岩浆岩控矿因素为例构建了定量化的非线性评价模型,在矿区圈定了4处找矿靶区,经实地深部钻探验证,发现了厚度较大、品位较高的矿体,表明所构建的模型对于矿区深部成矿预测效果较好。

Prospecting potential of the deep and edge of resource crisis mine is relatively large,however,there are great difficulties and risks in deep prospecting.Taking a copper mine in Heilongjiang Province as the study example,based on collecting the geological data of the mining area,combing with field analysis theory,the study ideal of＂analysis of metallogenic regularities and geological data integration,three-dimensional geological modeling and metallogenic information extraction,location and prediction of deep ore-body＂is proposed,by establishing the three-dimensional visualization metallogenic prediciton model,to delineate the prospecting target areas,and evaluate the metallogenic potential of the deep area.The study results show that：（1）the copper ore-bodies are distributed in the contact belt of Xinwu rock mass or near the contact belt of Xinwu rock mass,the ore-bodies are equispaced distributed along the rock lithology contact belts,the ore-bodies extend from southwest to northeast in the orefield;（2）taking the magnetic rock ore-controlling factor as the study example,quantitative nonlinear evaluation model,and four prospecting target ares in the mining area are delineated,by field deep drilling verification,the thick ore-bodies which grade is basically consistent to the deposit industrial grade are found,which further indicated that the model established in this paper is good to carry out the deep three-dimensional metallogenic prediction work.