成矿后构造破坏对矿床勘查类型的影响及勘查类型系数优化

发布时间：2018-07-13 13:25

【摘要】：现行勘查规范中,主要依据五个地质因素划分勘查类型,其中构造复杂程度因素对划分勘查类型的影响权重约10%。通过对多个矿床勘查类型的分析以及勘查工作经验的总结,研究构造复杂程度对矿床勘查类型的影响,发现成矿后构造破坏程度对矿床勘查类型划分的影响可能被低估。本文以湘潭锰矿为例,该矿床具有成矿后构造复杂、对矿体的破坏大等特点,勘探时将其划分为第Ⅱ勘查类型,以相应的勘查工程网度进行勘查,未能有效控制矿体;如果充分认识成矿后构造复杂、对矿体破坏大的实际情况,提高构造破坏程度对矿床勘探类型划分的影响权重,湘潭锰矿就会被确定为第Ⅲ勘查类型,方可有效控制矿体,也更符合地质实际。本文尝试将构造复杂程度对划分勘查类型的影响权重增大至25%,其勘查类型系数由0.1~0.3调整为0.1~0.9,即第I、第Ⅱ、第Ⅲ勘查类型的五个地质因素类型系数之和分别由2.5~3.0、1.8~2.4、1.0~1.7调整为3.0~3.6、2.2~2.9、1.0~2。在更充分认识成矿后构造破坏程度对勘查类型的影响后,可进一步优化矿床勘查类型系数,更合理地确定矿床勘查类型,进而改进对矿床的控制程度和勘查程度的评价。
[Abstract]:In the current exploration code, the exploration types are mainly divided according to five geological factors, among which the influence weight of structural complexity factors on the classification of exploration types is about 10%. By analyzing the exploration types of several deposits and summarizing the experience of exploration work, it is found that the influence of structural complexity on the classification of prospecting types may be underestimated. This paper takes Xiangtan Manganese Mine as an example. The ore deposit is characterized by complex structure after mineralization and great damage to orebody. It is divided into the second type of exploration during exploration, and the orebody can not be effectively controlled by the corresponding exploration engineering network. If we fully understand the complex structure after mineralization, the actual situation of large destruction of orebody, and increase the influence weight of structural failure degree on the classification of exploration type of ore deposit, Xiangtan Manganese Mine will be determined as the third type of exploration, so as to effectively control the orebody. It is also more in line with geological reality. This paper attempts to increase the influence weight of structural complexity on the classification of exploration types to 2510. The coefficient of exploration type is adjusted from 0.1 to 0.9, that is, the sum of the coefficients of the five geological factor types of the first, second and third types of exploration is adjusted from 2.5 / 3.0 / 1.82.4/ 1.0 / 1.7 to 3.0/ 3.62.22.9/ 1.01.02 respectively. After a better understanding of the influence of the degree of post-metallogenic structural damage on the exploration type, the coefficient of prospecting type can be further optimized, and the exploration type of deposit can be more reasonably determined, and the evaluation of the degree of control and exploration of the deposit can be improved.
【作者单位】：湖南省矿产资源储量评审中心;湖南省地质科学研究院;
【基金】：国家矿产资源储量技术标准体系建设项目之子课题《重要有色金属与贵金属及稀土稀有矿床合理勘查程度研究》(课题编号:CB2015-2-5)资助
【分类号】：P624

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