| Selective chemical degradation of kerogen from Nenjiang Formation of the southern Songliao Basin |
| |
| 作者单位： | XIONG YongQiang（State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640,China） ;
WANG YongQuan（State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640,China） ;
WANG YanMei（State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640,China） ; |
| |
| 摘 要： | A sequential selective chemical degradation has been performed on the kerogen from the Nenjiang Formation of the southern Songliao Basin by using a series of mild chemical degradations (alkaline hydrolysis, cleavage of ether-bonds and sulfur-bonds, and ruthenium tetroxide (RuO4) oxidation). Subsequently, the GC-MS analyses are carried out on different degradation products. The results show that chemical degradations can release a great number of GC/MS-determinable biomarkers from insoluble kerogen, such as, alkaline hydrolysis products mainly comprise n-alkanes, fatty acids and alkanols; thiophene compounds are predominantly ether-bound to kerogen matrix; the products from the cleavage of sulfur-sulfur and sulfur-carbon bonds in the kerogen include fatty acids, alkanols and some n-alkanes with high carbon numbers; RuO4 oxidation products are predominantly monocarboxylic acids and α,ω-dicarboxylic acids. The distributions of main degradation products indicate that organic matter in this kerogen is predominantly derived from algae and bacteria, and that small amounts of high plant-derived organic matter are possibly combined into kerogen matrix at the late stage by sulfur bonds and other means. This study will provide an important approach for further discussing sources of organic matter in source rocks and their depositional paleoenvironments.
|
| 收稿时间： | 11 January 2007 |
| 修稿时间： | 18 April 2007 |
Selective chemical degradation of kerogen from Nenjiang Formation of the southern Songliao Basin |
| |
| Authors: | Xiong YongQiang Wang YongQuan Wang YanMei |
| |
| Institution: | State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640,China |
| |
| Abstract: | A sequential selective chemical degradation has been performed on the kerogen from the Nenjiang Formation of the southern
Songliao Basin by using a series of mild chemical degradations (alkaline hydrolysis, cleavage of ether-bonds and sulfur-bonds,
and ruthenium tetroxide (RuO4) oxidation). Subsequently, the GC-MS analyses are carried out on different degradation products. The results show that chemical
degradations can release a great number of GC/MS-determinable biomarkers from insoluble kerogen, such as, alkaline hydrolysis
products mainly comprise n-alkanes, fatty acids and alkanols; thiophene compounds are predominantly ether-bound to kerogen matrix; the products from
the cleavage of sulfur-sulfur and sulfur-carbon bonds in the kerogen include fatty acids, alkanols and some n-alkanes with
high carbon numbers; RuO4 oxidation products are predominantly monocarboxylic acids and α,ω-dicarboxylic acids. The distributions of main degradation
products indicate that organic matter in this kerogen is predominantly derived from algae and bacteria, and that small amounts
of high plant-derived organic matter are possibly combined into kerogen matrix at the late stage by sulfur bonds and other
means. This study will provide an important approach for further discussing sources of organic matter in source rocks and
their depositional paleoenvironments.
Supported by the Frontier Research Program of Guangzhou Institute of Geochemistry of Chinese Academy of Sciences (Grant No.
GIGCX-04-08) and the National Natural Science Foundation of China (Grant No. 40372070) |
| |
| Keywords: | kerogen selective chemical degradation biomarker Songliao basin |
| 本文献已被 万方数据 SpringerLink 等数据库收录！ |
|
