MATLAB在碎屑沉积岩矿物含量计算中的应用

The Application of MATLAB in Calculation of Mineral Contents in Clastic Sedimentary Rocks

岩石学与地球化学研究中,岩石中矿物含量的确定是一项重要的基础工作,传统测定主要依赖偏光显微镜镜下观察统计或进行编程计算,效率较低。通过实例介绍了使用MATLAB工具箱中非负线性最小二乘法根据岩石化学与镜下观察到的矿物种类对碎屑沉积岩中矿物含量进行定量计算的应用。计算结果表明,使用这种计算方法对岩石矿物含量的计算结果明显比显微镜下统计的更准确、快速,值得推广应用。在使用同时,也要注意合适的矿物化学组成的正确选取,以保证计算的真实有效。

The calculation of mineral contents in rocks is an important basal work in geochemistry and petrology. The traditional methods mainly depend on microscope-observation and programme calculation, which are useful when the mineral compositions are simple, but these methods will be inefficient when the mineral contents are complex. This paper presents the Nonnegative linear least square method of MATLAB - a quick and precise method of calculating mineral contents of detrital rocks with some examples. The results show that it＇s more accurate and quick to use MATLAB than other methods. Simultaneously, when use MATLAB, pay attention to choosing the appropriate data to ensure the authenticity of the results.