The three-dimension structure and the enlightenment to the regional prospecting of the Jiujiang-Ruichang district

The authors analyzed the gravity and magnetic anomalies of the lower and middle reach of the Yangtze River area firstly, then studied the distributing characters of gravity and magnetic fields of Jiujiang-Ruichang district. The existing data of gravity and magnetic anomalies have been processed through the latest methods and techniques. Based on the result of gravity and magnetic multi-scale edge detection of the regional magnetic and gravimetric data of Jiujiang-Ruichang district, the distribution location of the fault system is redefined. On the basis of understanding the geological data and stratum parameter about Jiujiang-Ruichang district, detailed inversion was carried out in the relevant region. Meanwhile, three-dimensional magnetic and gravity properties inversion was used to distinguish and forecast the spatial distribution of stratum structure and igneous rocks in three-dimensional shape. According to the strength of inversed magnetic susceptibility, the basicity of magma rock has been analyzed which provides information for metal mineral exploration related with volcanic and intrusive rocks. The final geological models have been set up which vividly show the distribution characteristics of the formations, the ore-controlling structures and the three-dimensional configuration related with mineralization as well as the distribution characteristics of the body. The results supply abundant information for seeking deep concealed deposits in Jiujiang-Ruichang district.