Characteristics and geological significance of aeromagnetic anomalies in central and western Afghanistan
Afghanistan is rich in mineral resources,but less explored.Based on the analysis of aeromagnetic data in central and western Afghanistan since 2006,the polarization of magnetic anomaly data is processed by variable magnetic dip polarizing technology.The potential field conversion and separation of polarizing magnetic data are carried out by moving average filtering and vertical second derivative method,and the ver-tical second derivative anomalies,regional anomalies and local anomalies are obtained.Combining with the surface geological information of Afghanistan,the fault structure of the study area is identified and the loca-tion of the hidden acidic magmatic rocks is delineated.The results show that the magnetic properties of the Middle Sword and Metaglacial in Afghanistan are generally strong,while Quaternary,Neoproterozoic,and Cretaceous show generally low magnetic characteristics.The area is characterized by well-developed faults,with the Herat-Chakhchalan area as the boundary,the faults to the north of the boundary are in a nearly east-west direction,while those to the south of the boundary are in a north-east direction.The dis-tribution of magmatic rocks corresponds well with the high value of magnetic anomaly,and the characteris-tics are consistent with the regional structural characteristics.In the end,the results provides a geophysical basis for the exploration of oil and gas resources in central and western Afghanistan.
国家科技期刊平台
NSTL
万方数据
