| In this paper,the basalts covering the southeast of Changbai Mountain are studied,The survey line is mainly distributed in Songjianghe Town,Lushuihe Town,Erdaobaihe Town and Linjiang area,The geologic structure of the basalt cover under the investigation area is analyzed by the method of integrated geophysical prospecting,and reasonable deduction is givenThis paper collects a large number of geological and geophysical data about the previous survey area,Including regional geological features,predator exploration and metallogenic regularity of the investigation area.Through the treatment of gravity,magnetic and electrical anomaly data,a total of three gravity and magnetic profiles were completed,and four gravity,magnetic and electrical profiles were completed.By analyzing the distribution characteristics of geophysical anomalies in each section,it has a certain understanding of the geological structure under basalt cover.The thickness of the basalt is revealed,and the lithology and crystallization base of the bedrock are inferred.The lithology and geologic times of the geological structure-bedrock(middle layer)under the basaltic caprock are revealed.The discriminant is based on geoelectric profile retrieved by the Inversion of CSAMT,combined with the gravity profile The position on the curve,and the general magnetic field measurement range of the magnetic law curve.The basal nature,concealed or semi-concealed rock mass and sedimentary basins are mainly determined according to the field value on the Bouguer gravity curve and the shape and resistance of the deep anomalies in the geoelectric section.The tectonic discrimination is based on the vertical striped contour(band),the gravitational vertical derivative zero point and the horizontal derivative extreme point and the positive and negative conjugate anomaly position on the magnetic law curve.The geologic characteristics of the geophysical anomalies,the lithology,the age and the structure of the exposed location,the distribution of the rock mass and the anomalous nature of the rock mass distribution are predicted according to the regional geological features,and the typical mineral deposits are combined with the typical deposit model According to the inversion model to determine the depth of ore and ore thickness,delineation of four prospecting targets. |
