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分析表明,只要在二度断层结构范围内没有横向密度变化,则断层上延的任何点的重力值可保持不变.这样,就可得到一种重力解释的直接法。它是通过使用相应的数字技术,依据向上延拓地表重力值到不同水平面来描绘断层结构的断层面,然后找到需要的合成的直线重力图形。使用几套理论模型证明说法的效果,文中还应用了两套实际数据说明了本方法的使用效果。就小范围来说,加拿大握太华附近的格劳森斯尔断层似乎是近于铅垂的。就大范围来说,可通过陡倾斜的较大地壳中断区的密度突变来解释沿南阿帕拉契山脉COCORP地震剖面的重力场特征。
The analysis shows that as long as there is no lateral density change in the second-order fault structure, the gravity value of any point on the fault can be kept unchanged, so a direct method of gravity interpretation can be obtained. It is through the use of the corresponding digital technology, according to the upward extension of the surface gravity value to different levels to describe the fault structure of the fault plane, and then find the desired synthesis of linear gravitational graphics. Several sets of theoretical models are used to prove the effect of the method. Two sets of practical data are also used to illustrate the effect of the method. On a small scale, the Graveson Fault near Canada’s Taihua seems to be near-vertical. On a large scale, the gravitational field characteristics of the COCORP seismic profile along the South Appalachian can be explained by a sudden change in the density of discontinuities in the larger crust of steep slopes.