岩浆活动与内陆地震关系的探讨——以1976年唐山大震为例

A DISCUSSION ON THE RELATIONSHIP BETWEEN MAGMA ACTIVITY AND INLAND EARTHQUAKES——TAKE TANGSHAN EARTHQUAKE IN 1976 AS AN EXAMPLE

利用地震波探测、重力、地磁、地质等资料,论证了唐山地震前在震中区及其附近地区地壳内存在着的岩浆活动。认为唐山地震的发生可能是由于岩浆沿深大断裂向地壳内侵入,从而导致断裂重新破裂、扩展的结果。推断岩浆活动可能是内陆地震的一种成因。最后从岩浆活动的角度出发对一些地震现象作了讨论。

That the magma activity exists in the crust of epicenter and its adjacent area before Tangshan earthquake is discussed and proved by using data of seismic wave surveying, gravity, geomagnetism and geology, etc. . It is considered that the occurrence of earthquake could be the result of fault rebreaking and expanding by magma intruding into crust along deep fault. Finally, some seismic phenomena are discussed from the view of magma activity. And the magma activity could be a cause of inland earthquake.