spectrum index meaning in English

光谱指数
频谱指数

This article analyzes the mineralization mechanism of the uranium ore , constructs a series of spectra indexes including the ferric oxide index , the ferrous oxide index , the oxidation index , clay mineral index , brightness index , the green index and the humidity index , and draws the distribution and scope of the oxidation belt , deoxidation belt , the supplies and partial drainage of ground water in the research area , thus selects the advantageous area of uranium mineralization
通过分析铀矿的成矿机理，构建了氧化铁指数、氧化亚铁指数、氧化指数、粘土矿物指数、亮度指数、绿度指数和湿度指数等一系列光谱指数，提取了研究区氧化带、还原带、地下水补给与局部排泄的分布和范围，从而圈定了铀矿成矿的有利区。