一种有用的解释参数——航空伽玛能谱变异系数

AIRBORNE GAMA-RAY SPECTROMETRIC VARIATIONCOEFFICIENT──A USEFUL PARAMETERFOR INTERPRETATION

本文讨论了航空伽玛能谱变异系数(包括总计数率及钾、铀、钍含量变异系数,简称伽玛能谱变异系数)的计算、变异系数图的编制方法以及它们的地质应用。伽玛能谱变异系数是一种反映放射性元素空间分布特点及其地球化学活动程度的参数。变异系数图具有信息丰富、用途较广泛的特点。结合其它物化探资料,可用来进行地质填图和找矿远景评价等。研究表明,伽玛能谱变异系数可做为航空伽玛能谱资料解释一种很有用的参数。

This paper deals with the computation, map compilation, and geological application of the airborne gamma-ray spectrometric variation coefficient, which includes variation coefficients of total counts and potassium, uranium and tho- rium contents. It is a parameter that reflects the features of spatial distribu- tion and the degree of geochemical activities of the radioactive elements. The map of the variation coefficient is characterized by its abundance of informa- tion and extensiveness of application. In combination with other geophysical and geochemical data, it can be used in geological mapping and evaluation of metallogenic prospects. Studies show that this coefficient serves as a very use- ful parameter in the interpretation of airborne gamma-ray spectrometric data.