秦保燕, 徐纪人, 翟文杰. 南北地震带北段现今地壳应力场讨论[J]. 华北地震科学, 1986, 4(1): 1-15.
引用本文: 秦保燕, 徐纪人, 翟文杰. 南北地震带北段现今地壳应力场讨论[J]. 华北地震科学, 1986, 4(1): 1-15.
Qin Baoyan, Xu Jiren, Zhai wenjie. DISCUSSION ON THE CURRENT CRUSTAL STRESS FIELD IN THE NORTH SEGMENT OF THE SOUTH-NORTH SEISMIC BELT[J]. North China Earthquake Sciences, 1986, 4(1): 1-15.
Citation: Qin Baoyan, Xu Jiren, Zhai wenjie. DISCUSSION ON THE CURRENT CRUSTAL STRESS FIELD IN THE NORTH SEGMENT OF THE SOUTH-NORTH SEISMIC BELT[J]. North China Earthquake Sciences, 1986, 4(1): 1-15.

南北地震带北段现今地壳应力场讨论

DISCUSSION ON THE CURRENT CRUSTAL STRESS FIELD IN THE NORTH SEGMENT OF THE SOUTH-NORTH SEISMIC BELT

  • 摘要: 本文根据1970~1983年间南北地震带北段(松潘至五原)的强震、中强震、小震震源机制以及分区小震综合断层面解综合判定了该带的分区主压力方向,并对总的构造力源进行了讨论。此外根据中强地震的余震区分布和宏观极震区长轴确定了该带发震断层的优势方向,由此讨论了南北地震带北段现今构造运动的特点。

     

    Abstract: This paper judged the direction of regional compressive stress axis, based on the source mechanism of the strong, moderate, small earthquakes and the composite fault plane solution of small earhtquakes in several regions of the north segment of the South-North Seismic Belt (from Shongp-an to Wuyuan) from 1970 to 1983, and discussed the general tectonic compressive stress direction in the segment. This paper also determined the predominant direction of the fault belt based on the aftershock distributions of the moderate, strong earthquakes and on the long axis of the isoseismic zone, and discussed the characteristics of current tectonic movement in the north segment.

     

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