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红河断裂和永胜宾川断裂是云南省内的活动构造带,历史上都发生过9～10度的大地震。为研究它们的现今活动,本文分析了处于其交汇部位的下关巍山网的两期水平测量(1959年三角和1980年测边)资料。认为复测区可能受印度板块挤压,有整体向北西方向推移且略有向东偏转的迹象。红河断裂在本区内属压性,而远离断裂的东西两侧以张性为主。网西北下关附近面收缩显著。但总的来看,该区域20年来应变积累不大,其值均为10~(6)量级,近期发生强震的可能性不大。
The Honghe fault and Yongsheng Binchuan fault are the active tectonic belts in Yunnan Province. There have been 9 to 10 magnitude earthquakes in history. In order to study their current activities, this paper analyzes the data of two periods of horizontal measurement (Triangle of 1959 and Edge of 1980) of the Xiaguanguan network at its intersection. It is considered that the retest area may be squeezed by the Indian plate with the overall sign of moving northwest and slightly eastward. The Honghe fault belongs to the pressure in this area, but the tension-oriented both sides of the east and west away from the fracture. Northwest Hebei Shuanghuan contraction near the significant. However, on the whole, there is not much strain accumulated in the region over the past 20 years, and the values are all on the order of 10 to 6. It is unlikely that a strong earthquake will occur in the near future.