Surfer软件中利用趋势面方法圈定化探异常

元素在地壳中的分布通常受一系列因素的控制而显示空间上的系统变化,表现为元素有区域性增高或降低的趋势,化探工作的一部分重要内容就是如何在元素的空间分布中发现局部富集部位,如何将元素异常从空间分布中提取出来是化探工作研究的关键问题.趋势面分析方法把元素的空间分布分解为整体趋势和局部异常两部分,将局部异常从整体中分离了出来.文章运用实例说明了如何利用Surfer软件实现趋势面分析方法圈定化探异常分布.

USING TENDENCY ANALYSIS METHOD TO DEAL WITH GEOCHEMICAL DATA BASED ON THE SURFER SOFTWARE

Element distribution is usually controlled by a series of factors and shown systematic changes on the space in the crust with tendency of regional increase or decrease. One of important task for geochemical exploration is how to find local element concentration region in the space, and it is the key problem how to distinguish anomaly from element background values. Tendency analysis method divides element distribution into ensemble trend and local anomaly, and separates local anomaly from ensemble trend. This paper deals with geochemical data of Ba, Cu and Zn element by using tendency analysis method, illuminates how to draw geochemical element distribution utilizing the Suffer software. Compared with traditional methods, it is concluded that tendency analysis method are more adapted to real geological situation.