How to identify event layers in sedimentary rock cores

摘要

PROBLEM TO BE SOLVED: To obtain a method for identifying an event layer in a rock core of a sediment. The present invention discloses a method for identifying an event layer in a rock core of a sediment. It includes: (1) The rock core of the sediment is divided, and the elements of the rock core of the sediment are scanned by X-ray to obtain the intensity data of the elements contained in the rock core of the sediment. (2) Based on the obtained element intensity data, the analysis index of the sedimentary layer is determined according to the endowment characteristics of the element in the sedimentary layer. (3) Obtain a change curve for each depth based on the analysis index, analyze the intensity data of the elements using a statistical analysis method, and determine the magnitude of the threshold value. A straight line parallel to the depth is created in the analysis index curve by the threshold value, and the straight line intersects with the change curve of the analysis index after normalization. Furthermore, accurate identification of the event layer is realized according to the identification criteria of the event layer. This proposal not only can identify minute event layers in rock cores, but also has high identification efficiency and accuracy, provides powerful technical support for the development of paleoclimate and paleoenvironmental research in the ocean, and has high practical value. There is.