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Methyltrimethyltridecylchromans (MTTCs) in lacustrine sediments in the northern Bohai Bay Basin, China
Jiang, Kaixi1; Lin, Chunming1; Peng, Li2; Zhang, Xia1; Cai, Chunfang3
2019-07-01
发表期刊ORGANIC GEOCHEMISTRY
ISSN0146-6380
卷号133页码:1-9
摘要

Although methyltrimethyltridecylchromans (MTTCs) have been identified and studied for over 30 years in a large number of sediment extracts and crude oils, their origins and significance for palaeosalinity are still debated. Here, the geochemical features of MTTCs in 133 organic-rich lacustrine sediments obtained from the northern Bohai Bay Basin, China, are studied in detail. The sediment samples are in an immature to early mature stage and primarily enriched in Types I and II organic matter, which were deposited in lacustrine environments with relatively weakly stratified water columns and anoxic to suboxic conditions. The development of photic zone euxinia (PZE) in the water column was indicated by the occurrence of aryl isoprenoids. MTTCs were detected in all samples and characterized by low abundances of delta-MTTC and high abundances of alpha-MTTC. Variations in the relative abundance of MTTCs and calculated MTTCI values, suggest that selected lacustrine sediments were deposited in normal to semi-saline environments. A ternary diagram of mono-, di- and trimethyl-MTTCs was established, and shows potential for application as an indicator of changes in palaeosalinity. Variations in the abundance of MTTCs can effectively indicate palaeosalinity changes in lacustrine environments. (C) 2019 Elsevier Ltd. All rights reserved.

关键词MTTCs Origin Palaeosalinity Lacustrine environments
DOI10.1016/j.orggeochem.2019.03.003
语种英语
关键词[WOS]PRISTANE INVOLVING DERIVATION ; SONGLIAO BASIN ; SOURCE ROCKS ; INDICATORS ; DIAGENESIS ; CHROMANS ; CHLOROPHYLL ; HYPOTHESIS ; BIOMARKERS ; ORIGIN
资助项目National Natural Science Foundation of China[41572112] ; Postgraduate Research & Practice Innovation Program of Jiangsu Province, China[KYCX18_0038] ; Tianjin Branch of the China National Offshore Oil Company Ltd.
WOS研究方向Geochemistry & Geophysics
WOS类目Geochemistry & Geophysics
WOS记录号WOS:000469208100001
项目资助者National Natural Science Foundation of China ; Postgraduate Research & Practice Innovation Program of Jiangsu Province, China ; Tianjin Branch of the China National Offshore Oil Company Ltd.
出版者PERGAMON-ELSEVIER SCIENCE LTD
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/38528
专题中国科学院南京地质古生物研究所
通讯作者Jiang, Kaixi; Lin, Chunming
作者单位1.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210023, Jiangsu, Peoples R China
2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Expt Technol Ctr, Nanjing 210008, Jiangsu, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714
Jiang, Kaixi,Lin, Chunming,Peng, Li,et al. Methyltrimethyltridecylchromans (MTTCs) in lacustrine sediments in the northern Bohai Bay Basin, China[J]. ORGANIC GEOCHEMISTRY,2019,133:1-9.
APA Jiang, Kaixi,Lin, Chunming,Peng, Li,Zhang, Xia,&Cai, Chunfang.(2019).Methyltrimethyltridecylchromans (MTTCs) in lacustrine sediments in the northern Bohai Bay Basin, China.ORGANIC GEOCHEMISTRY,133,1-9.
MLA Jiang, Kaixi,et al."Methyltrimethyltridecylchromans (MTTCs) in lacustrine sediments in the northern Bohai Bay Basin, China".ORGANIC GEOCHEMISTRY 133(2019):1-9.
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