【作者】 王谦身； 张耀厚；

【Author】 Wang Qianshen Zhang Yaohou (Institute of Geophysics,Chinese Academy of Sciences)

【机构】 中国科学院地球物理研究所；

【摘要】 地面上测量的重力值是地下浅部及深部、局部与区域性因素的各重力效应的综合反映,因此,在研究地壳构造——莫霍界面起伏问题时,必须解决求取能反映深部构造界面起伏变化的"深部重力异常场"的问题。本文对通用的滤波方法得到的平均重力场表示深部重力异常场存在的问题与限制进行了研讨,指出平均重力场仅在一定条件下可以代用,否则得到的地壳构造的结果将被歪曲,甚至是错误的。更多还原

【Abstract】 The measured values of surface gravity are the comprehensive manifestation of gravity effects of shallow and deep,local and regional factors.For this reason,in research of crustal structure-the relief of Moho discontinuity,the problem of seating the suitable deep gravity anomaly field which reflects the relief of interfaces in crustal structure must be solved. In this paper,the problem and the limitation of the average gravity field which is obtained by general filter method and represents the deep gravity field are studied.The result is:under given conditions,deep gravity field can be represented by average gravity field;if not,the interpretative result of crustal structure will be distort and even erroneous.更多还原