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富蕴断裂是阿尔泰地区低应变速率条件下的典型右旋走滑断层之一。野外考察和3个观测点的3D陆地LiDAR扫描DEM影像断错地貌恢复、重建,结合高分辨率卫星影像解译等进一步证实,1931年富蕴地震同震右旋走滑位移平均值为(6.3±1.2)m,且沿富蕴断裂向南北两端缓慢、平稳衰减,中部同震位移最大值为(6.7±0.5)m,而不是前人给出的10～14m;包含2～5次地震的同震累积位移值为1931年富蕴地震相同地点同震位移的整数倍,表明富蕴断裂大地震复发服从特征地震模型。2个观测点多级地貌面宇宙成因核素(10Be)系统测年数据,进一步限定富蕴断裂晚更新世以来的右旋走滑速率为(0.76±0.24)mm/a,大地震复发间隔(9700±3300)a。低滑动速率和长周期特征地震复发模型可能为板块间相互作用产生的远程应变效应的基本特征。
Fuyun fault is one of the typical dextral strike-slip faults at low strain rates in the Altai region. Field observations and 3 observation sites of 3D terrestrial LiDAR scanning DEM image restoration and reconstruction, combined with high-resolution satellite image interpretation and further confirmed that in 1931 Fuyun earthquake coseismic dextral strike-slip displacement average (6.3 ± 1.2) m, and slowly and steadily decayed along the Fuyun fault to the north and south. The maximum value of coseismic displacements in the middle was (6.7 ± 0.5) m instead of 10 ~ 14m as previously reported. The earthquakes with 2 ~ 5 earthquakes The accumulated coseismic displacement value is an integral multiple of the coseismic displacement at the same site of the Fuyun earthquake in 1931, indicating that the recurrence of the Fuyun Fault large earthquake obeys the characteristic seismic model. The dating data of multi-level geomorphic cosmic origin (10Be) system at two observation sites further limited the dextral strike-slip rate of (0.76 ± 0.24) mm / a since Richo fault late Pleistocene, 9700 ± 3300) a. Seismic recurrence models with low slip rates and long-period features may be fundamental features of the remote strain effect produced by plate-to-plate interactions.