Geophysical Characteristics And Application Effect Of The Luoquan Graphite Deposit,Heilongjiang Province

The Luoquan graphite deposit is located in the Fe-Au-P-graphite skimite metallogenic belt of the Jiamusi Xingkai massif.It has undergone many stages of magmatic activity and tectonic movement,such as the Mashan period-Xingdong period and so on.The metallogenic geological conditions are superior.The study area is located in the Jiamusi stratigraphic area and the Shuangyashan tectonic-stratigraphic division.The outcropping strata are mainly the daantao group of the middle and New Proterozoic Xingdong group daantao group,the graphite granulite and the black cloud oblique long gneiss mixture,and the Cretaceous Dongshan andesite.The metamorphism in the area is strong,and the tectonic and magmatic rocks are not developed.The ore bodies mainly occur in the crystalline gneiss and schist of the lower section of the Dagan group,Xingdong group.There are 15 graphite ore beds distributed among them.The ore bodies can be divided into gneiss type and schist type.The ore minerals are mainly graphite,a small amount of pyrite and chalcopyrite,and the gangue minerals are mainly quartz,mica and plagioclase,and the ore structure is scale.The flaky structure is mainly composed of flaky and gneiss structures,and wall rock alteration is widespread,mainly silicification,carbonation and chlorinification.The minerals in the study area has the characteristics of low resistance and high polarization,and the anomaly field of natural potential shows that the region of the ore body is characterized by high negative anomaly,and the morphology and distribution of the abnormality of the natural potential reflect the distribution characteristics of the structure and ore body of the mining area,and the results of the high density resistivity profile show that the characteristics of the low resistance zone may reflect the change of the ore body.The results of excitation sounding indicate that the location of the ore bearing geological bodies is larger and the intensity is higher.According to the geophysical characteristics of the mining area,the comprehensive geophysical method is used to verify the parts of the area,and there are many graphite ore bodies.It is proved that the method has significant effect in the process of prospecting and exploration in this area.