利用多源重力观测数据反演渤海湾地区构造应力场

以最小二乘配置为基础，推导了基于观测信号的自适应融合算法。对渤海湾地区航空重力、陆地重力和卫星测高3类实测数据进行了基于观测信号的自适应融合处理，提高了融合区域重力观测数据精度。采用融合后的重力异常数据反演了渤海湾地区构造应力场，并结合地震历史资料进行初步分析，总结了该地区构造应力场的总体特征。反演结果表明，渤海湾地区构造应力场方向整体上呈现朝北方向，构造应力场清晰显现出郯庐断裂带和张家口-蓬莱断裂带分布，并且在郯庐和张家口-蓬莱断裂带唐山至张家口段构造应力聚集程度高、构造应力值也较大，表明该地区构造运动活跃，与该地区地震活动历史资料相符。

Tectonic Stress Field in Bohai Bay Area Inversed by Multi-source Gravity Observation Data

Based on least squares collocation, adaptive fusion algorithm based on observation signals is deduced. The airborne gravity data, satellite gravity data and land gravity data of Bohai bay area are combined by the adaptive fusion algorithm based on observation signals. The accuracy of gravity observation data is improved after fusion. Tectonic stress field in Bohai area is inversed using gravity observation data after adaptive fusion.Combined with earthquake historical data, tectonic stress field in Bohai area is analyzed. Characteristics of Tectonic stress field in Bohai area are summarized. There is a close relationship between gravity and tectonic stress. The direction of tectonic stress field is towards the north.Tanlu and Zhangjiakou-Penglai Fault zone are consistent with tectonic stress field in Bohai area. Tectonic stress is gathered in high degree in these Fault zone. And the value of tectonic stress is higher than others as well.It is showed that the tectonic movement is active in Tanlu Fault and Zhangjiakou-Penglai Fault from Tangshan to Zhangjiakou, corresponding with historical earthquake data.