...陆逆冲带表现为在强烈的区域性挤压背景下,深部物质沿壳内拆离层自SW向NE方向的"层状"流动,在地壳上部转化为沿映秀-北川断裂(YBF)的快速垂向挤出,而其西侧的松潘-甘孜地块作自SE往NW方向的重力滑覆,东侧的龙门山前陆盆地则表现为自NE往SW方向的走滑或右行旋转。
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汶川地震; 映秀-北川断裂; 活动分段特征; 地震震级; 强震复发周期;
Wenchuan earthquake; Yingxiu-Beichuan fault; activity segmentation; assessment of earthquake magnitude; recurrence interval of strong earthquake;
在龙门山断裂带中段的北川地区进行了土壤氡浓度随时间的动态变化定点观测。
The dynamic variation of the Radon-density in soil with the lapse of time has been obtained from surveying at fixed position in Beichuan area along the middle part of the Longmenshan fault zone.
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