Several Problems on the Use of Relative Abundances of Fluorenes, Dibenzofurans and Dibenzothiophenes in the Study of Depositional Environment
Abstract: The relative abundances of fluorene (F), dibenzofuran (DBF) and dibenzothiophene (DBT) and their methyl substituted homologues in oils and sedimentary organic matters are important geochemical parameters indicating the depositional environments. This paper discusses the relative contents of Fs, DBFs and DBTs using three different methods, i.e. only considering parent molecules, including methyl- and dimethyl-homologues, respectively. It suggested that the relative abundances of fluorenes keep an approximately constant value in oils originated from both typical oxic terrestrial lacustrine shales and anoxic marine carbonate source rocks. In comparison, the relative abundance of DBFs is relatively higher when methyl- and dimethyl-dibenzofurans were considered. Correspondingly, the relative abundances of DBTs decrease by a maximum of 15%. The paper preliminarily analyzes the chemical mechanism that results in these differences between Fs, DBFs and DBTs. It is concluded that it is better to consider more methylated homologues and same statistic method must be applied in data sets with different sources.
文章引用: 李美俊 , 师生宝 , 王铁冠 , 张利文 , 杨福林 (2013) 应用石油中“三芴”系列判识沉积环境的几个问题。 地球科学前沿， 3， 22-28. doi: 10.12677/AG.2013.31004
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