塔里木盆地海相碳酸盐岩中有机酸盐的分析  

Analysis of organic acid salts of marine carbonate rocks in Tarim Basin

作　　者：孙敏卓[1] 孟仟祥[1] 郑建京[1] 王国仓[1] 房嬛[1] 王作栋[1] 

机构地区：[1]中国科学院油气资源研究重点实验室,甘肃兰州730000

出　　处：《中南大学学报（自然科学版）》2013年第1期216-222,共7页Journal of Central South University:Science and Technology

基　　金：石油化工联合基金资助项目(40739902);中国科学院知识创新工程青年人才类重要方向研究项目(KZCX2-EW-QN112);国家自然科学基金资助项目(41072106)

摘　　要：提出热重/差热(TG/DTA)、红外光谱(IR)和气相色谱/质谱联用结合(GC/MS)分析塔里木盆地海相碳酸盐岩中有机酸盐的方法。用TG/DTA对标样(硬脂酸、硬脂酸镁、硬脂酸钙和碳酸钙)进行分析,确定有机酸气化而有机酸盐不气化的温度区间,由此设计从碳酸盐岩中分离和提取有机酸盐的实验步骤。研究结果表明:验证碳酸盐岩中确实存在有机酸盐;塔里木盆地海相碳酸盐岩中有机酸盐的含量与样品中的碳酸盐含量无相关性,而与样品的沉积相类型具有一定的相关性,即斜坡相沉积环境的沉积岩中相对富集有机酸盐。A method was developed for the determination of the organic acid salts of marine carbonate rocks in Tarim Basin by the thermogravimetric/differential thermal （TG/DTA）, infrared spectroscopy （IR） and gas chromatography/mass spectrometry （GC/MS）.By analyzing the guide sample such as the stearic acid, the magnesium stearate, the calcium stearate and the calcium carbonate by TG/DTA, the temperature range where the organic acid was gasificated while the organic acid salt wasn＇t gasificated were defined, and thereby the experimental procedures for separating and extracting the organic acid salt from the carbonatite rock was designed.The results show that the organic acid salt exists in carbonatite rock by using the infrared spectroscopy and gas chromatography/mass spectrometry. The quantity of the organic acid salts of marine carbonate rocks in Tarim Basin is insignificantly correlated with the carbonate content of samples, but it is correlated with the types of sedimentary facies of samples, namely relative enrichment of the organic acid salts in sedimentary strata of the slope facies sedimentary environment.

关 键 词：海相碳酸盐岩 有机酸盐 红外光谱法 热重 差热法 气相色谱 质谱联用法 

分 类 号：P599[天文地球—地球化学]