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Title:: Tectonic Movement Characteristics in Heilongjiang Section of Yilan-Yitong Fault Zone

作者:: 常金龙¹; 2; 甘卫军³; 刘淑杰⁴; 刘志俊⁵; 教智浡²; (1.黑龙江省地震局,黑龙江哈尔滨 150090; 2.黑龙江省鹤岗地震台,黑龙江鹤岗 154101; 3.中国地震局地质研究所,北京 100029; 4.鹤岗市自然资源局,黑龙江鹤岗 154100; 5.齐齐哈尔市地震局,黑龙江齐齐哈尔 161000)

Author(s):: CHANG Jinlong¹; 2; GAN Weijun³; LIU Shujie⁴; LIU Zhijun⁵; JIAO Zhibo²; (1.Heilongjiang Earthquake Agency,Harbin 150090,Heilongjiang,China)(2.Hegang Seismic Station of Heilongjiang Provice,Hegang 154101,Heilongjiang,China)(3.Institute of Geology,China Earthquake Administration,Beijing 100029,China)(4.Bureau of National Resources of Hegang,Hegang 154100,Heilongjiang,China)(5.Qiqihar Seismological Bureau,Qiqihar 161000,Heilongjiang,China)

Keywords:: Yilan-Yitong fault; fault slip rate; GPS velocity field; tectonic movement

摘要:: 为研究依兰—伊通断裂带黑龙江段构造运动特征,基于2016—2019年GPS和地质资料,解算了该断裂的三维速度场,通过构建断层模型反演了滑动速率。结果显示:依兰—伊通断裂带黑龙江段总体呈下沉趋势,沉降速率在1～2 mm/a,断裂呈右旋走滑态势,闭锁层15 km以下走滑速率为(1.7±0.4)mm/a。佳木斯—萝北段以右旋走滑为主、拉张为辅; 五常—佳木斯段以拉张为主、右旋走滑为辅。

Abstract:: In order to study the characteristics of tectonic movement in Heilongjiang section of the Yilan-Yitong fault zone,we calculated the recent three-dimensional velocity field based on GPS continuous station and geological data in Heilongjiang region from 2016 to 2019,and inverted the fault slip rate by constracting the fault model.The following conclusions are obtained:the Heilongjiang section of the Yilan-Yitong fault zone generally shows a subsidence trend,with a settlement rate of 1～2 mm/a.The fault is dextral strike slip,and the strike slip rate is(1.7 ± 0.4)mm /a at 15 km below the locking layer.The Yilan-Yitong fault zone is divided into Jiamusi-Luobei segment and Wuchang-Jiamusi segment.The activity of the Jiamusi-Luobei segment is mainly tension,and the dextral strike slip is a supplement,that of the Wuchang-Jiamusi segment is mainly dextral strike slip,and the tension is a supplement.