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文中采用遥感资料,对阿尔泰山东缘的主要活动断裂———科布多(Hovd)断裂与哈尔乌苏湖(Har-Nuur)断裂进行研究,从地貌特征上对断裂进行详细分析,揭示其几何学和运动学特征。初步研究表明阿尔泰山东缘的活动断裂规模、滑动速率和强地震活动并不弱于其西南缘。其中科布多断裂走向NNW,右旋走滑,长约600km,中更新世(Q2p)以来最大水系右旋位错约9.0km,滑动速率可达3.8～12.3mm/a,平均滑动速率约7.8mm/a;哈尔乌苏湖断裂走向NNW,右旋走滑,长约480km,全新世以来活动性明显增强,第四纪洪积扇上发现有最新的断裂迹象。阿尔泰山东缘的新构造运动与强地震活动,除了与印度-欧亚板块碰撞作用有关外,可能还与局部地区的动力学过程有关。
In this paper, remote sensing data are used to study the Hovd fault and the Har-Nuur fault in the eastern edge of the Altay Mountains. Geometric and kinematic features. Preliminary studies have shown that the active fault size, slip rate and strong earthquakes in the eastern margin of the Altay Mountains are not weaker than their southwest margins. Among them, the Kebuduo fault moves to the NNW, and the dextral strike-slip length is about 600 km. Since the Middle Pleistocene (Q2p), the maximum dextral dislocation of the water system is about 9.0 km, the slip rate can reach 3.8 ~ 12.3 mm / a and the average slip rate is about 7.8 mm / a; the Halwusu Lake fault goes to NNW and dextral strike-slip, about 480 km in length. The Holocene activity has been significantly enhanced. Quaternary alluvial fans show the latest signs of faults. Neotectonic and strong earthquakes on the eastern margin of the Altai Mountains may be related to the dynamical processes in some areas except for the collision with the India-Eurasian plate.