关于地壳厚度计算方法的修正

利用前苏联学者（１９５８．）计算地壳厚度公式计算了兰州－天水－武都地区的布格重力异常．发现其结果与人工地震爆破得出的结果相差很大。造成差值大的原因可能是地壳界面边界效应的作用。为使计算结果尽量接近实际地壳厚度。所以要从计算地壳厚度公式中减去每一测点的效应值，依此法推算出任意点的地壳厚度。

MODIFICATION OF THE CALCULATING METHOD ABOUT CRUSTAL THICKNESS

Based on the computing formula of crustal thickness suggested by former the Soviet scholar P. M. Gemenichkaya (1958) to calculate the Bouguer gravity anomaly in Lanzhoui-Wudu area,it is found that the difference is very big between the computing result and the result from man--made earthquake. This is probably caused by crustal boundary effect. In order to make the computing result approach the real crustal thickness further,the effect value of every station should be minused from the computing formula. The crustal thinkness of any station can be inferred with this method.