摘要 重力异常四次导数和重力异常二次导数一样,具有突出局部异常,压制区域异常的作用。利用重力场的泰勒级数展开式,可求出重力异常的四次导数。利用华北 G 凹陷1:5万重力细测资料,计算了重力异常四次导数,和地震勘探的下第三系构造图以及前第三系构造图相对比,其构造符合率达75%,并发现一批可能的潜伏构造。这对于地质构造很复杂的地区来说,是有意义的。本文是对重力异常高次导数应用的一次尝试,尚有一些问题需作进一步研究。
Abstract:As the second derivative does,the forth derivative of gravity anomaly projects local anomaly but suppresses regional anomaly.The forth derivative of gravity anomaly can be obtained by Taylor series expansion of gravity field.The forth derivative of gravity anomaly from 1:50,000 gravity survey in G depression in North China is derived,and the result indicated by the forth derivative is compared with Paleogene and Pretertiary seismic structural maps.The comparison shows that their structural conformability is 5%.Furthermore,some new potential anticlines are discovered.This is a significant method for the area where geological structure is complicated,This is only an attempt on the application of higher derivative of gravity anomaly,There are still some problems which must be furthen studied.
收稿日期: 1984-06-07
引用本文:
郭云汉. 利用重力高次导数寻找沉积岩内部构造的尝试[J]. 石油地球物理勘探, 1985, 20(3): 299-304.
Guo Yunhan. An attempt to study the structure of sedimentary rock by higher derivative of gravity anomaly. OGP, 1985, 20(3): 299-304.