在内蒙古中部地区开展接触变质型石墨矿1:5万专题地质填图试点工作,查明了接触变质石墨矿成矿要素和找矿标志.白云鄂博群尖山组一段炭质地层是石墨矿化的主要层位,经历低程度的区域变质作用,叠加了晚古生代岩浆活动的强烈接触变质改造,发生了大规模的石墨矿化.通过石墨矿专题地质调查,圈定了3处石墨找矿靶区,3处成矿远景区,预测远景资源储量大于2000×104t.不同于传统的矿产地质调查,以成矿作用为核心的专题地质调查工作,是以石墨成矿关键问题为导向,开展石墨成矿作用研究,构建成矿模型和找矿标志,从而指导矿产地质调查填图,可以快速圈定矿化异常,开展异常查证和评价,提高了找矿工作效率.%The thematic geological mapping for graphite deposits was conducted in the Xinhure area, middle of Inner Mongolia. Through this work, the essential minerogenic factors and prospecting criteria for graphite deposits were confirmed. The lower part of Jianshan Formation of the Bayan Obo Group consists of carbonaceous slate, which is the key strata of the graphite depos-its. After a lower degree of regional metamorphism, it experienced thermal contact metamorphism caused by the magmatic activi-ty in Late Paleozoic,which resulted in a large-scale graphite mineralization in this formation. According to the thematic geologi-cal mapping, the authors detected that there are 3 prospecting target areas and 3 mineralization prospective areas of graphite. The total predictive resources of the 3 targets have reached over 20 million tons. Compared with the traditional geological mapping, the thematic geological mapping is concentrated on the key geological problems of graphite metallogeny in this area, and empha-sizes the important role of the pre-research on the typical deposit, which guides the thematic geological mapping from the begin-ning to the end. With this means, the prospecting target can be delineated quickly, and the efficiency of prospecting work can be improved.
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