苏北双湖晶质石墨矿找矿预测模型

为了使苏北地区晶质石墨矿勘查取得新突破，研究苏鲁造山带(江苏段)典型石墨矿床成矿规律及找矿模型具有重要意义。通过总结双湖石墨矿床地质、物探等综合特征，结合研究其成矿模式及关键找矿要素，总结了找矿预测模型。研究表明，双湖石墨矿体呈似层状、透镜状产于东海杂岩斜长角闪岩大理岩组一套大理岩-变粒岩-石英岩中，含矿岩性为石墨石英岩、含石墨大理岩，系多期区域变质作用形成。双湖石墨矿属区域沉积变质型晶质石墨矿，矿(化)体的产状、规模、形态均受大理岩控制，大理岩既是含矿母岩，又是赋矿围岩。石墨矿化体与低阻高极化异常基本吻合。据此建立了地质-地球物理找矿预测模型。可见，在含矿地层附近采用激电测量是快速确定找矿远景区的方法。

Study on prospecting prediction model of Shuanghu crystalline graphite deposit in Northern Jiangsu

In order to make a new breakthrough in the exploration of crystalline graphite deposits in Northern Jiangsu, it is of great significance to study the metallogenic law and prospecting model of typical graphite deposits in the Sulu orogenic belt (Jiangsu section). By summarizing the geological and geophysical characteristics of Shuanghu Graphite Deposit, combined with the study of its metallogenic model and key prospecting elements, the prospecting prediction model is summarized. The research shows that the Shuanghu graphite ore body occurs in a set of marble granulite quartzite of the amphibolite marble formation of the East China Sea complex in a layered and lenticular shape. The ore bearing lithology is graphite quartzite and graphite containing marble, which is formed by multi-stage regional metamorphism. Shuanghu graphite mine is a regional sedimentary metamorphic crystalline graphite mine. The occurrence, scale and shape of ore (chemical) body are controlled by marble, which is not only the ore bearing parent rock, but also the ore bearing surrounding rock. The graphite mineralized body is basically consistent with the anomaly of low resistance and high polarization. On this basis, a geological geophysical prospecting prediction model is established. It can be seen that IP measurement near the ore bearing strata is a method to quickly determine the prospecting prospect.