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引言众所周知,重力垂直二次导数是布伽异常沿垂直方向的二次导数,也就是重力位沿垂直方向的三次导数,是划分区域场和局部异常的有效方法.重力垂直二次导数有许多计算公式,所得结果不同,原因何在,究竟它们的意义是什么?它们之间有什么异同?能否提出一个准则来选择某一公式?计算精度如何评定?都是值得我们探讨的.本文结合一些实际成果粗略谈几点认识,抛砖引玉,请同志们批评指正.一二次导数法的一般意义大家知道,布伽异常中包含着比局部异常大得多的区域性异常,而和矿产分布有关的局部异常,往往被其掩盖或发生畸变.过去,我们习惯于从实测布伽异常图上来分辨局部异常,就是通常所讲的封闭和凸扭.这种
INTRODUCTION It is well known that the second derivative of vertical gravity is the second derivative of the Bragg anomaly along the vertical direction, that is, the third derivative of the vertical direction of the gravitational potential is an effective method to divide the regional field and local anomalies. What are their meanings? What are the similarities and differences between them? Can we propose a criterion to choose a certain formula? How to evaluate the calculation accuracy? All of these are worth discussing.This paper combines some actual The results of a rough talk about a few understanding, initiate, please comrades criticism Correction. The general meaning of the first and second derivative method We all know that the Buga anomalies contain much larger than the local anomalies of regional anomalies, and mineral distribution-related local Abnormal, often masked or distorted. In the past, we are accustomed to from the actual Bragg abnormal graph to identify local anomalies, is commonly referred to as closure and convex torsion.