关键词: 黄铁矿, 黄铜矿, 热电性, 热电阻, 找矿预测

Abstract: The Huangtun S-Fe-Au-Cu deposit in Lujiang County，Anhui Province is located on the northeastern margin of the Luzong Basin in the middle and lower reaches of the Yangtze River mineralization belt. It is originally a large pyrite deposit. In recent years，a thick and large hidden explosive breccia-type gold and copper deposit has been newly discovered，which is the first deposit of this type in the Luzong Ba⁃ sin. The discovery of the new ore body has enriched the types of ore deposits in the Luzong Basin and provid⁃ ed new inspirations for the exploration of gold and copper in the region. Based on the study of the basic char⁃ acteristics of the deposit，a total of 220 samples of ore/altered rock from 9 boreholes in the mining area were collected. The thermoelectric and thermal resistance characteristics of pyrite and chalcopyrite inside and out⁃ side the hidden explosion breccia cylinder in the Huangtun mining area were studied by using the mineral thermoelectric instrument and thermal resistance instrument system. The results show that with the increase of activation temperature (50~80 ℃)，there is a 95% probability that the thermoelectric characteristics of the sample chalcopyrite measurement points in the hidden explosion breccia cylinder will disappear，while this phenomenon does not occur in the thermoelectric properties of chalcopyrite outside the hidden explosion breccia cylinder. Compared with the thermal resistance ranges of pyrite and chalcopyrite outside the breccia cylinder (0~10 Ω·m and 0~5 Ω·m respectively)，the thermal resistance rate ranges of pyrite and chalcopy⁃ rite inside the breccia cylinder are significantly broader (0~40 Ω·m and 0~25 Ω·m respectively). There⁃ fore，based on the electrical characteristics of pyrite and chalcopyrite，it is possible to effectively identify py⁃ rite and chalcopyrite under the mineralization conditions of regional hidden explosion breccia. This is of great guiding significance for further searching for hidden explosion breccia-type gold and copper mineral⁃ ization in the Huangtun mining area and even the Luzong Basin，and it also has reference significance for discovering new mineralization clues in the Luzong Basin.

Key words: pyrite, chalcopyrite, thermoelectric property, thermal resistance, mineral prospecting