Carbazole distributions in rocks from non-marine depositional environments

doi:10.1016/j.orggeochem.2008.03.011

	Carbazole distributions in rocks from non-marine depositional environments
	Zhang, Chunming 1,2; Zhang, Yuqing 2; Zhang, Min 2; Zhao, Hongjing 2; Cai, Chunfang 3
刊名	ORGANIC GEOCHEMISTRY
	2008-07-01
卷号	39 期号:7 页码:868-878
ISSN号	0146-6380
DOI	10.1016/j.orggeochem.2008.03.011
文献子类	Article
英文摘要	Pyrrolic nitrogen compounds have been studied from extracts of the rocks collected from the Tertiary saline lacustrine strata in the Qaidam basin and the Middle-Lower Jurassic coal-bearing strata in the Turpan basin, NW China. Biomarker signatures revealed the presence of three sample groups, related to saline lacustrine conditions in the Qaidam Basin, and freshwater lake and swamp depositional settings in the Turpan Basin. Significant differences in carbazole distributions were observed among the sample groups from different depositional environments. Generally, a strong predominance of 1,4-+1,5-dimethylcarbazoles over 1,3-+1,6-dimethylcarbazoles was found for the Qaidam rocks from the saline lacustrine settings, with a ratio of 1,3-+1,6-/1,4-+1,5-dimethylcarbazole ranging from 0.35 to 0.66, while enhanced amounts of 1,3-+1,6-dimethylcarbazoles relative to 1,4+1,5-dimethylcarbazoles were detected for the Turpan samples from the swamp environments, with the 1,3-+1,6-/1,4-+1,5-dimethylcarbazole ratio > 0.8. Samples from the freshwater lake environments in the Turpan Basin showed intermediate values for the 1,3+1,6-/1,4- +1,5-dimethylcarbazole ratio. In addition, a predominance of 2,4-dimethylcarbazole over 2,6-dimethylcarbazole was observed for the Qaidam samples, whereas most Turpan samples showed elevated amounts of 2,6-dimethylcarbazole relative to 2,4dimethylcarbazole. Moreover, 3-methylcarbazole occurred as the least abundant Cl-carbazole isomer for most Qaidam rocks, while the Turpan samples from swamp settings often showed an enhanced abundance of 3-methylcarbazole. The 1,3-+1,6-/1,4- +1,5-dimethylcarbazole ratio was observed to have a positive correlation with 3-/4-methylcarbazole, 2,6-/2,4-dimethylcarbazole and Pr/Ph, respectively. These observations may indicate that C-1- and C-2-carbazoles with a methyl group at C-3 (C-6) prevailed for swamp settings, whereas isomers with a methyl at C-4 (C-5) were dominant for the freshwater or saline lacustrine environments. Although variations in benzocarbazoles were detected in the bitumens, an obvious correlation was not observed for the different depositional environments. (c) 2008 Elsevier Ltd. All rights reserved.
WOS关键词	PYRROLIC NITROGEN-COMPOUNDS ; NORTHERN QAIDAM BASIN ; PETROLEUM SYSTEMS ; NORTHWEST CHINA ; TURPAN BASIN ; CRUDE OILS ; GEOCHEMICAL CHARACTERIZATION ; MIGRATION ; MATURITY ; PALEOENVIRONMENTS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000258057200006
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/68768]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhang, Chunming
作者单位	1.Yangtze Univ, Dept Geochem, Jinzhou 434023, Hubei, Peoples R China 2.Yangtze Univ, Key Lab Explorat Technol Oil & Gas Resources, Minist Educ, Jinzhou 434023, Hubei, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Chunming,Zhang, Yuqing,Zhang, Min,et al. Carbazole distributions in rocks from non-marine depositional environments[J]. ORGANIC GEOCHEMISTRY,2008,39(7):868-878.
APA	Zhang, Chunming,Zhang, Yuqing,Zhang, Min,Zhao, Hongjing,&Cai, Chunfang.(2008).Carbazole distributions in rocks from non-marine depositional environments.ORGANIC GEOCHEMISTRY,39(7),868-878.
MLA	Zhang, Chunming,et al."Carbazole distributions in rocks from non-marine depositional environments".ORGANIC GEOCHEMISTRY 39.7(2008):868-878.