岩矿测试2024，Vol.43Issue(6)：847-857,11.DOI:10.15898/j.ykcs.202403110038
沉积岩有机碳同位素组成测定的前处理方法研究
A Pre-Treatment Method for the Determination of Organic Carbon Isotope Composition in Sedimentary Rocks
摘要
Abstract
The organic carbon in sedimentary rocks is mainly in the form of kerogen,and it is necessary to extract kerogen from samples before obtaining the organic carbon isotope value.The extraction process requires a significant quantity of hazardous chemicals and a long preparation process.Therefore,in daily work,there is an urgent need to develop a more convenient and environmentally friendly pre-treatment method.A simple acid treatment method was established,and 110 sedimentary rock samples with different lithology(limestone,shale,oil shale)and different organic carbon content range(0.83％-35.33％)were selected for comparison experiments of two pretreatment methods.The results show that for 94％of the samples,the difference of carbon isotope values obtained by the acid pretreatment method established in this study and the kerogen extraction method was less than 1.0％o,which met the deviation requirements for repeated measurements,indicating that this pretreatment method can be used to accurately obtain the key geological parameter of an organic carbon isotope value.Furthermore,the organic carbon content and lithology of the samples does not influence the results,demonstrating the applicability of this method to typical geological samples and fulfilling the requirements of geological exploration and investigation.The BRIEF REPORT is available for this paper at http://www.ykcs.ac.cn/en/article/doi/10.15898/j.ykcs.202403110038.关键词
碳同位素/沉积岩/前处理方法/酸处理/干酪根Key words
carbon isotope/sedimentary rock/pretreatment method/acid treatment/kerogen分类
天文与地球科学引用本文复制引用
杨宗彩,徐学敏,杨佳佳,沈斌,苑坤,张小涛,许智超,翟佳..沉积岩有机碳同位素组成测定的前处理方法研究[J].岩矿测试,2024,43(6):847-857,11.基金项目
国家自然基金青年基金项目(41702159) （41702159）
中国地质调查局地质调查项目(DD20243553) （DD20243553）
