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以安徽铜陵凤凰山矿田为例,通过综合地质研究,构建了矿体定位预测概念模型。在地质勘探数据和物化探数据集成的基础上,采用三维地质建模技术,对地层、构造、岩浆岩、矿体等地质体进行了推断和圈定,构建了地质体的线框模型与块体模型。基于定位预测概念模型和地质体三维块体模型,通过地质空间定义和立体单元划分,建立了岩体及其表面形态起伏、接触带、地层、褶皱、断层等控矿地质因素的三维栅格场模型。在定量分析控矿地质因素与矿化分布的关系的基础上,建立了反应这种关联关系的矿体立体定量预测模型。预测模型提供矿田深部(-1000m标高以上)所有50m×50m×50m立体单元的铜品位、铜金属量和含矿概率的预测结果。基于预测结果圈定了4个深部找矿立体靶区,为深部找矿工程的设计、布置提供尚未发现的隐伏矿体的位置、品位、金属量等信息的指导。
Taking the Fenghuangshan ore field in Tongling, Anhui Province as an example, a conceptual model of ore body positioning prediction is constructed through comprehensive geological research. Based on the integration of geophysical and geophysical data and geologic prospecting data, three-dimensional geological modeling techniques are used to infer and delineate the geological bodies such as strata, structures, magmatic rocks and ore bodies, and the framework model and block model. Based on the concept model of positioning prediction and the three-dimensional block model of geological body, the three-dimensional grid field of rock mass and its ore-controlling geological factors such as undulation, contact zone, formation, fold and fault is established through the definition of geological space and the division of three- model. Based on the quantitative analysis of the relationship between ore-controlling geological factors and mineralization distribution, a three-dimensional quantitative prediction model of ore body is established. The prediction model provides predictions of copper grade, copper metal content, and ore-bearing probabilities for all 50m x 50m x 50m units in the deep mine (above -1000m elevation). Based on the prediction results, four deep ore prospecting target areas are delineated to provide guidance on the location, grade, metal content and other information of the hidden orebody that has not been discovered for the design and layout of the deep ore prospecting project.