陇西旋卷构造及其与地震的关系

文本详细叙述了陇西旋卷构造的展布特征,认为陇西旋卷构造展布在青藏地块、阿拉善地块和鄂尔多斯地块之间,其整体向固原、宝鸡一带收敛,向西北方向撒开,主要旋回面两侧相对作反时针扭动,总的可以划分为六盘山—南、西华山—毛毛山、香山、炭山—窑山—烟筒山、大、小罗山—牛首山和青龙山五个旋回褶带。该构造在卫星照片上有明显的显示,现今仍有强烈活动,对7级以上地震有明显的控制作用,並有地震自外旋带向内旋带迁移,震级逐渐增大的特点。本文认为陇西旋卷构造的形成是受青藏地块和鄂尔多斯地块的活动的影响所至。

ON THE LONGXI ROTATING-ROLLING TECTONIC AND THE RELATION BETWEEN THE TECTONIC AND EARTHQUAKES

In this paper, the author goes into the details of the characteristics which show how the Longxi rotating-rolling tectonic is dictributed. It is believed that this tectonic is distributed among the Qinghai-Xizang massif, the Alashan massif and the Eerduos massif. It may be divided into five cycle tectonic belts. They are the Liupanshan Mountain-the Nanhuashan and the Xihuashan Mountains-the Maomaoshan Mountain, the Xiang shan Mountain, the TanShan Mountain-the Yaoshan Mountain-the Yantongshan Mountain, the Daluoshan and the Xiaoluoshan Mountains and the Qinglongshan Mountain. They congregated to the Guyuan-Baoji area and scattered Northwestward. Two sides of principal cycle surface moved in counterclockwise rotation.This tectonic was clearly shown on the satellite picture and still moves at present. Earthquakes(Ms>7)often depend on it and moves from the outer cycle belt to the inner and the magnitude of these earthquakes is getting greater and greater.The author holds that the formation of the Long ting-rolling tectonic is the result of the movement of the Qinghai-Xizang massif and the Eerduos massif.