有序聚类分析在云南下奥陶统汤池组分解中的应用

THE APPLICATION OF ORDERED CLUSTER ANALYSIS IN THE DECOMPOSITION OF THE TANGCHI FORMATION OF LOWER ORDOVICIAN IN YUNNAN

有序聚类分析是一种对野外宏观岩石地层划分行之有效的补充和辅助研究方法。基于区域地质调查中获得的岩石光谱分析数据,采用有序样品多变量最优分割法,对云南寻甸槽房地区前人所划下奥陶统汤池组进行了化学地层划分应用研究,得到的地球化学界面与野外岩石地层划分界面高度吻合,将其分解为寒武系苗岭统西王庙组至下石炭统万寿山组7个组级地层单位。

Ordered clustering analysis is an effective supplementary and auxiliary research method for macroscopic rock stratigraphic division in the field.Based on the rock spectral analysis data obtained from the regional geological survey,the chemical stratigraphic division of the strata,which was previously divided into the Lower Ordovician Tangchi Formation,in the Caofang area of Xundian,Yunnan,was applied by using the sequential sample multivariable optimal segmentation method.The obtained geochemical interface is highly consistent with the field rock stratigraphic division interface,and the strata is decomposed into seven formations from the Xiwangmiao Formation of the Cambrian Miaoling Series to the Wanshoushan Formation of the Lower Carboniferous.