GEOPHYSICAL PROSPECTING EFFECT IN THE GRAPHITE-BEARING STRATA IN EASTERN LIAONING: A Case Study of the Diaoyutai Gold-Silver Deposit
-
摘要: 辽东地区高家峪组地层中，由于地层岩性中的含墨性，形成的高极化率异常值（低电阻率异常值）往往高于（低于）矿致异常值，严重影响了物探方法找矿效果，有的地区甚至无法开展物探找矿工作.本文以钓鱼台金银矿找矿为例，通过对矿区的地层岩性结构、成矿地质条件及控矿、容矿地质构造的分析，进行岩矿石电性测定，采用激电中梯和音频大地电磁组合方法进行综合探测，建立起含墨地层岩性的异常响应模型，并对矿致异常进行正确的识别和划分，经钻探验证取得了较好的找矿效果.Abstract: Due to the graphite contained in the Gaojiayu Formation in Eastern Liaoning area, the anomaly value of high polarizability is often higher than that of ore-induced anomalies, while that of low resistance is commonly lower. That seriously affects the prospecting results of geophysical methods. In this paper, the exploration in Diaoyutai Au-Ag deposit is analyzed as an example. On the basis of the stratigraphic and lithologic structure, metallogenic geological conditions and ore-controlling and ore-host structures, the electrical properties of rocks and ores are measured. With IP intermediate gradient and AMT combined method, the abnormal response model is established for the graphite-bearing strata, by which the ore-induced anomalies are correctly identified and classified. The verification drilling shows a good result.
-
-
计量
- 文章访问数: 281
- PDF下载数: 40
- 施引文献: 0
下载: