Collected Item: “Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae”
Врста публикације
Рад у часопису
Верзија рада
објављена верзија
Језик рада
енглески
Аутор/и (Милан Марковић, Никола Николић)
Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović
Наслов рада (Наслов - поднаслов)
Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae
Наслов часописа
Organic Geochemistry
Издавач (Београд : Просвета)
Elsevier BV
Година издавања
2019
Сажетак на енглеском језику
Two previously unidentified dehydroabietane isomers were isolated from Miocene Serbian lignite and
Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy
as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane
skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual
six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS
in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers.
Dehydroicetexanes are often abundant in high latitude coals and mudstones ranging from Triassic to
Miocene, and in high latitude oils (Canada and Greenland) sourced from terrigenous organic matter.
The trans/(cis + trans) dehydroicetexane ratio is low in immature sediments, but usually around 0.83 in
oils and mature sediments with vitrinite reflectance (%Rr) above 0.5, suggesting an equilibrium from
the start of the oil window. Dehydroicetexanes are more stable than dehydroabietane and some oils, rich
in dehydroicetexanes, contain no dehydroabietane. Precursors could be plant diterpenoids having the icetexane
structure, which have been known for more than 40 years and isolated from a variety of higher
plant sources, including some angiosperms. Many of the relatively simple icetexanes were isolated for
the first time from Chamaecyparis pisifera and related species where they seem to be particularly abundant,
suggesting that dehydroicetexanes may be used as markers for the genus Chamaecyparis or for
Cupressoideae in general.
Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy
as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane
skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual
six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS
in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers.
Dehydroicetexanes are often abundant in high latitude coals and mudstones ranging from Triassic to
Miocene, and in high latitude oils (Canada and Greenland) sourced from terrigenous organic matter.
The trans/(cis + trans) dehydroicetexane ratio is low in immature sediments, but usually around 0.83 in
oils and mature sediments with vitrinite reflectance (%Rr) above 0.5, suggesting an equilibrium from
the start of the oil window. Dehydroicetexanes are more stable than dehydroabietane and some oils, rich
in dehydroicetexanes, contain no dehydroabietane. Precursors could be plant diterpenoids having the icetexane
structure, which have been known for more than 40 years and isolated from a variety of higher
plant sources, including some angiosperms. Many of the relatively simple icetexanes were isolated for
the first time from Chamaecyparis pisifera and related species where they seem to be particularly abundant,
suggesting that dehydroicetexanes may be used as markers for the genus Chamaecyparis or for
Cupressoideae in general.
Волумен/том или годиште часописа
2019
Број часописа
129
Почетна страна
14
Завршна страна
23
DOI број
10.1016/j.orggeochem.2019.01.001
ISSN број часописа
0146-6380
Кључне речи на српском (одвојене знаком ", ")
Geochemistry and Petrology
Кључне речи на енглеском (одвојене знаком ", ")
Geochemistry and Petrology
Линк
https://api.elsevier.com/content/article/PII:S0146638019300014?httpAccept=text/xml
Шира категорија рада према правилнику МПНТ
M20
Ужа категорија рада према правилнику МПНТ
М22
Пројект у склопу кога је настао рад
OI176007 - 45. Геохемијска испитивања седиментних стена - фосилна горива и загађивачи животне средине
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