Complex patterns of steroidal biomarkers in Tertiary lacustrine sediments of the Biyang Basin, China

Junhong Chen; Roger E. Summons

doi:10.1016/S0146-6380(00)00145-5

Complex patterns of steroidal biomarkers in Tertiary lacustrine sediments of the Biyang Basin, China

Junhong Chen, Roger E. Summons^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

46 Citations (Scopus)

Abstract

Gas chromatography (GC), gas chromatography-mass spectrometry (GC-MS) and gas chromatography-mass spectrometry-mass spectrometry (GC-MS-MS) with co-injected synthetic standards were used to analyse the biomarker patterns of some Tertiary lacustrine clayey dolomites from the Biyang Basin, China. The lithology, low Pr/Ph ratio and high gammacerane content of these sediments indicated that high salinity prevailed during their deposition. The distributions of steroidal hydrocarbons were particularly unusual and several pseudohomologous series, including regular steranes (C₂₇-C₂₉), 4-methyl steranes (C₂₈-C₃₀ including dinosteranes), 3β-ethyl steranes (C₂₉-C₃₁), lanostanes (C₃₀-C₃₂), and a variety of other 3β-alkylated steranes were identified. 3β-n-Propylcholestane, 3β-n-propylstigmastane and 4,4-dimethylcholestane were identified using authentic standards and this is the first time these compounds have been unambiguously characterised in sediments. Crown

Original language	English
Pages (from-to)	115-126
Number of pages	12
Journal	Organic Geochemistry
Volume	32
Issue number	1
DOIs	https://doi.org/10.1016/S0146-6380(00)00145-5
Publication status	Published - Jan 2001

Keywords

3β-Alkylated steranes
4,4-Dimethyl steranes
Biomarkers
Biyang Basin
China
Dinosterane
Hydrocarbons
Hypersaline
Lacustrine sediments
Lanostanes
Steroids
Tertiary

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title = "Complex patterns of steroidal biomarkers in Tertiary lacustrine sediments of the Biyang Basin, China",

abstract = "Gas chromatography (GC), gas chromatography-mass spectrometry (GC-MS) and gas chromatography-mass spectrometry-mass spectrometry (GC-MS-MS) with co-injected synthetic standards were used to analyse the biomarker patterns of some Tertiary lacustrine clayey dolomites from the Biyang Basin, China. The lithology, low Pr/Ph ratio and high gammacerane content of these sediments indicated that high salinity prevailed during their deposition. The distributions of steroidal hydrocarbons were particularly unusual and several pseudohomologous series, including regular steranes (C27-C29), 4-methyl steranes (C28-C30 including dinosteranes), 3β-ethyl steranes (C29-C31), lanostanes (C30-C32), and a variety of other 3β-alkylated steranes were identified. 3β-n-Propylcholestane, 3β-n-propylstigmastane and 4,4-dimethylcholestane were identified using authentic standards and this is the first time these compounds have been unambiguously characterised in sediments. Crown",

keywords = "3β-Alkylated steranes, 4,4-Dimethyl steranes, Biomarkers, Biyang Basin, China, Dinosterane, Hydrocarbons, Hypersaline, Lacustrine sediments, Lanostanes, Steroids, Tertiary",

author = "Junhong Chen and Summons, {Roger E.}",

year = "2001",

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doi = "10.1016/S0146-6380(00)00145-5",

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AU - Chen, Junhong

AU - Summons, Roger E.

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N2 - Gas chromatography (GC), gas chromatography-mass spectrometry (GC-MS) and gas chromatography-mass spectrometry-mass spectrometry (GC-MS-MS) with co-injected synthetic standards were used to analyse the biomarker patterns of some Tertiary lacustrine clayey dolomites from the Biyang Basin, China. The lithology, low Pr/Ph ratio and high gammacerane content of these sediments indicated that high salinity prevailed during their deposition. The distributions of steroidal hydrocarbons were particularly unusual and several pseudohomologous series, including regular steranes (C27-C29), 4-methyl steranes (C28-C30 including dinosteranes), 3β-ethyl steranes (C29-C31), lanostanes (C30-C32), and a variety of other 3β-alkylated steranes were identified. 3β-n-Propylcholestane, 3β-n-propylstigmastane and 4,4-dimethylcholestane were identified using authentic standards and this is the first time these compounds have been unambiguously characterised in sediments. Crown

AB - Gas chromatography (GC), gas chromatography-mass spectrometry (GC-MS) and gas chromatography-mass spectrometry-mass spectrometry (GC-MS-MS) with co-injected synthetic standards were used to analyse the biomarker patterns of some Tertiary lacustrine clayey dolomites from the Biyang Basin, China. The lithology, low Pr/Ph ratio and high gammacerane content of these sediments indicated that high salinity prevailed during their deposition. The distributions of steroidal hydrocarbons were particularly unusual and several pseudohomologous series, including regular steranes (C27-C29), 4-methyl steranes (C28-C30 including dinosteranes), 3β-ethyl steranes (C29-C31), lanostanes (C30-C32), and a variety of other 3β-alkylated steranes were identified. 3β-n-Propylcholestane, 3β-n-propylstigmastane and 4,4-dimethylcholestane were identified using authentic standards and this is the first time these compounds have been unambiguously characterised in sediments. Crown

KW - 3β-Alkylated steranes

KW - 4,4-Dimethyl steranes

KW - Biomarkers

KW - Biyang Basin

KW - China

KW - Dinosterane

KW - Hydrocarbons

KW - Hypersaline

KW - Lacustrine sediments

KW - Lanostanes

KW - Steroids

KW - Tertiary

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DO - 10.1016/S0146-6380(00)00145-5

M3 - Article

AN - SCOPUS:0035139449

SN - 0146-6380

VL - 32

SP - 115

EP - 126

JO - Organic Geochemistry

JF - Organic Geochemistry

IS - 1

ER -

Complex patterns of steroidal biomarkers in Tertiary lacustrine sediments of the Biyang Basin, China

Abstract

Keywords

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