论文部分内容阅读
近年我省用小比例尺重磁成果,开展了区划工作,试图了解深部地质构造格架,进行成矿予测等。区划基于的物探资料有1/50万的重力图和航磁图。重力图是由1/l0万、1/20万和1/40万等不同比例尺资料缩编的,大别、神农和黄陵地区因缺少上述资料而用1/100万资料弥补。航磁图是由1/5万—1/40万资料缩编的,神农地区用1/100万航磁资料弥补。上述资料均作了数据处理,重力在经纬度30′范围内进行数值算术平均(图1),这是重力解释的基本资料,深大断裂的划分和用二维富氏变换公式计算的莫氏面深度(图2),都是由它作为基本资料完成的。航磁成果,将原△T化极后,上延5、10、20、40km,用上延10km成果减去上延40km成果得△T_(TD)=30km增量场(图3)。最终的构造推断成果见图4。
In recent years, our province with a small scale gravimetric magnetic results, carried out the zoning work, trying to understand the deep geological structure of the framework for mineralization and so on. The geophysical data based on zoning is 1/5000000 gravimetric and aeromagnetic map. The gravity map is reduced by 1 / 100,000, 1 / 200,000 and 1 / 400,000 different scales. Dabie, Shennong and Huangling areas are compensated with 1/100 million data due to the lack of the above data. Aeromagnetic map is reduced by 1/5 million -1/40 million data, Shennong area with 1/100 million aeromagnetic data make up. The above data are processed and the gravity is numerically averaged within 30 ’of latitude and longitude (Figure 1). This is the basic data for gravity interpretation. The division of deep faults and the Mohr’s surface calculated by the two-dimensional Fourier transform formula Depth (Figure 2), it is completed as a basic information. Aeromagnetic results, the original △ T after the pole, the extension of 5,10,20,40 km, with the extension of the results of 10km minus the results of the extension of 40km △ T_ (TD) = 30km incremental field (Figure 3). The final structure inferred results shown in Figure 4.