γ能谱法判定地质岩芯样品的岩性  

Determination of Lithology of Geological Core Samples with γ-spectrometry

作　　者：辜润秋 林宏健 

机构地区：[1]成都理工大学核技术与自动化工程学院,成都610059

出　　处：《核电子学与探测技术》2015年第5期510-513,共4页Nuclear Electronics & Detection Technology

基　　金：国家863计划项目(2012AA06180303)资助

摘　　要：介绍了用γ能谱法测定岩芯中K、U和Th,判别岩样岩性的分析方法。运用逆矩阵法,通过测量标准物质,得到了相应的刻度系数,并据此建立了判别岩样岩性的一些常见岩石和矿物的K、U、Th峰计数率范围。实验中通过对泥岩样品的测量,验证了该方法的适用性和可靠性,并得出泥岩中岩石的颜色越浅,灰质成分含量越高,其放射性强度就越低。An analysis method which uses the gamma spectrometry to determine the K, U and Th of cores and distinguishes the lithology of rock samples is Introduced. The author uses the inverse matrix method, and obtains the corresponding scale coefficient by measuring the standard substance, and then builds the K, U, Th peak count rate range of some common rocks and minerals to distinguish the lithology of rock samples. Experiment verifies the applicability and reliability of the method by measuring mudstone samples and concludes that in the mudstone the lighter color the rock is and the higher gray matter content, the lower radioactivity it will be.

关 键 词：Γ能谱法 岩芯分析 岩性识别 

分 类 号：TL812[核科学技术—核技术及应用]