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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。
Based on the least-squares configuration, an adaptive fusion algorithm based on observed signals is derived. Three kinds of measured data of airborne gravity, land gravity and satellite altimetry in Bohai Bay Region were processed by adaptive fusion based on observed signals, which improved the precision of gravity observation data in the fusion area. Based on the data of gravity anomaly, the tectonic stress field in Bohai Bay area is inverted. Based on the historical data of the earthquake, the tectonic stress field is summarized. The general characteristics of the tectonic stress field in the area are summarized. The inversion results show that the direction of tectonic stress field in the Bohai Bay region presents a northward direction as a whole. The tectonic stress field clearly shows the distribution of the Tan-Lu fault zone and the Zhangjiakou-Penglai fault zone. In the Tanlu and Zhangjiakou-Penglai fault zones, The high tectonic stress concentration and tectonic stress values also indicate that the tectonic movement in the area is active, consistent with the historical data of seismic activity in the area.