摘要
传统方法对重力异常的总梯度作归一化计算时,通常是对总梯度的模作算术平均。笔者对归一化函数的分母分别作了几何平均、调和平均、修匀平均和中值平均,计算归一化函数。通过模型试验对比这四种不同的统计平均,其中几何平均重力归一化总梯度在进行反演计算时,抗噪能力更强,反演结果更加集中、准确。将该方法应用于山东招远金矿采空区,改进后的方法可以更加准确地确定采空区的水平位置和中心埋深。
Traditional normalized full gradient methods usually use arithmetic average to calculate the normalized function with the module of total gradient.The authors use four different kinds of averages such as geometric,harmonic-,smoothing-and median averages to calculate the normalized function.Compared these four different kinds of statistical averages,it is found that the geometric average has less affect by noise,which made the results of inversion more concentrated and accurate.Then the modified method was applied in mined-out area of Zhaoyuan gold deposit in Shandong,it can quickly and accurately find the horizonal position of the mind-out area and its central buried depth.
出处
《世界地质》
CAS
CSCD
2014年第4期889-894,共6页
World Geology
基金
国家科技支撑计划项目(2009BAB43B00)
关键词
重力归一化总梯度
统计平均
采空区
normalized full gradient
statistical average
mined-out area
