面积分析法在显微镜下矿物含量分析中的应用

Application of Area Analysis in Mineral Content Analysis under Microscope

实际工作中,地质工作者通常依靠传统目估方法观察显微镜下的岩石薄片,粗略估计视域内各种矿物的含量。此方法存在一定的误差和局限性,如评估标准不同、选取的观察视域是否具有代表性等均会对分析结果产生影响。基于此,本文提出了一种基于图像采集和Photoshop (PS)技术的面积分析法。该方法通过岩石薄片全幅面采集、矿物标记、像素分析等一系列系统的操作方法,将矿物面积换算为像素数量,该矿物所占像素数量与总像素数量的比值即代表矿物含量。经研究对比发现,面积分析法操作简便,可有效地减小传统目测的误差,从而提高显微镜下矿物含量分析的精度。

In practice, traditional methods, which artificially observe the thin slices of rock under the microscope are usually used by geologists to roughly estimate the mineral contents in the field of view. There are some errors and limitations of this method. The analysis results will be affected by different evaluation criteria and observation fields. To solve the issue, this paper puts forward a kind of area analysis method based on image acquisition and Photoshop (PS) technology. Through a series of systematic operation methods such as rock slice collection in full format, mineral filling and pixel analysis, the mineral area will be converted into the number of pixels. In this way, mineral content can be represented by number of colored pixels with the ratio of the total number of pixels. It is found that the area analysis method is easy to operate and can effectively reduce personal equations, so as to improve the accuracy of mineral content analysis under the microscope.