矿区范围的划分与勘查程度的确定

矿床是由地质作用形成的、具有开采利用价值的有用矿物的聚集地,由若干个经地质勘查圈定的矿体组成。由于地质勘查的阶段性,一定勘查阶段圈定的矿体往往只是一个矿区某些矿体或某个矿体的一些矿段,一个矿床的所有矿体往往是多个地质勘查报告(简称地勘报告)提交的。因此,一个矿床的矿区范围由多个地质勘查报告圈定的矿体的空间范围来界定。由于矿区内各个地质勘查报告的工作程度可能会不一致,因此整个矿区的工作程度需要重新确定。总结了矿区范围的划分原则,并对矿区勘查程度的确定提出了定性原则和量化模型。这些原则和模型不仅成功指导了"全国矿产资源利用现状调查成果集成与应用"项目中矿区范围的划分和矿区勘查程度的确定,对评估整装勘查区内矿床的勘查程度、合理部署整装勘查区找矿勘查工作及合理设置采矿权均具有现实的参考价值。

Principles and methods of determining the boundary of a mining area and its exploration stage

As a concentration area of useful minerals, a mineral deposit is formed by geological processes and composed of some orebodies which are determined by geological exploration. Geological exploration is of stage characteristics. A certain exploration stage can only account for some orebodies of one mineral deposit or some sections of one orebody. Therefore, the determination of the resources and the boundary of a mineral deposit depends on the distribution of orebodies confirmed by more than one exploration event. Because the exploration stages of different exploration events in one mineral deposit are often different, the exploration stage needs reevaluation. This paper summarizes the principles of determining the boundary of a mineral deposit ,and puts forward the qualitative principles and a quantitative model for determining the exploration stage of a mineral deposit. These principles and the model not only can be successfully applied to determining the boundary of a mineral deposit as well as its exploration stage for The Quo-status Investigation of National Mineral Resources Utilization in China, but also can be used to determine the exploration stages of the mineral deposits in Equipped Exploration Areas. They are of realistic significance in reasonable exploration and exploitation of mineral deposits in Equipped Exploration Areas.