关键词: 梯度张量, 断裂构造, 构造单元, 虎林盆地, 傅里叶变换

Abstract:

The  full gravity gradient  tensor was calculated  from gravity anomaly data of Hulin Basin with    fast Fourier  transform.
Based on zero values of Vxx and Vyy components  indicating boundaries of sources and  their orientations approximately along x
or y axes, Vzz indicating the location and extent of anomalies, Vzx, Vzy and Vxy highlighting structure of NS, EW and NE (NW),
a comprehensive analysis was conducted on  the characteristics of Hulin Basin gravity and  its gradient  tensor. We deduced  that
there are NE-NW-NEE-and EW- and NS-trending  faults  in    the study area,  five of which were described. Based on  the synthetic
characteristics of gravity anomalies and their tensor, and fault distribution, Hulin Basin consists of three uplifts and two depressions,
corresponding to Yinchun uplift, Hulin River depression, central Hulin uplift, Donglinzi depression and Xingkai lake uplift.

Key words: gradient tensor, fracture structures, structural units, Hulin Basin, Fourier transform