【摘要】 笔者提出重力空间导数成像技术,来实现构造倾向的识别。根据不同高度重力异常水平导数极值点分布与构造倾斜方向的对应关系,可直观地显示断裂的倾向,且计算简便。理论单台阶和双台阶模型试验表明,重力空间导数成像技术能准确和稳定地获得断裂的倾向特征。由于本方法是利用上半空间重力数据的导数,所以模型试验结果具有较高的抗噪性。利用重力空间导数成像技术对松辽盆地重力异常数据进行断裂倾向识别,盆地北侧断层的倾向大多为NW倾,说明盆地构造的形成主要受控于西太平洋板块俯冲的作用,盆地南端部分构造表现为垂直倾向,这与后期西伯利亚板块的南向运动有关。更多还原

【Abstract】 In this paper,the gravity space derivative imaging technology is proposed to identify the dip of structure. According to the corresponding relationship between the extreme point distribution of the gravity anomaly level and the dip of the structure,the dip of the faults can be visually displayed,and the calculation is simple. The theoretical single-step and double-step model tests show that the gravity space derivative imaging technology can obtain the dip of faults accurately and stably. Moreover,because this method uses the derivative of upper half space gravity data,the result of model test is much free from noise. The gravity derivative imaging technique is used on gravity anomaly data in Songliao Basin to identify the dip of the fault,and it shows that the northern fault of the basin is northwest-dipping,which indicates that the basin structure is mainly controlled by the subduction of western Pacific Plate,and the fault in the southern part of the basin is vertical,which is related to the southward movement of the Siberian Plate in the later stage.更多还原