New triaromatic steroids distinguish Paleozoic from Mesozoic oil

Certain biomarkers in petroleum provide information on of the geologic age of its source rock and these can also be used to track the evolution, radiation and relationships between taxa and as proxies for paleoenvironmental reconstruction. Triaromatic 23,24-dimethylcholesteroids (TA-DMC), which undo...

Full description

Saved in:
Bibliographic Details
Published in:Organic geochemistry 2011-05, Vol.42 (4), p.409-424
Main Authors: Barbanti, Silvana M., Moldowan, J. Michael, Watt, David S., Kolaczkowska, E.
Format: Article
Language:English
Subjects:
Bacillariophyceae
biomarkers
Dinophyceae
Earth sciences
Earth, ocean, space
Exact sciences and technology
extinction
Geochemistry
global change
Haptophyta
oils
Paleobotany
paleoclimatology
Paleontology
petroleum
Soil and rock geochemistry
steroids
Stratigraphy
trophic relationships
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Certain biomarkers in petroleum provide information on of the geologic age of its source rock and these can also be used to track the evolution, radiation and relationships between taxa and as proxies for paleoenvironmental reconstruction. Triaromatic 23,24-dimethylcholesteroids (TA-DMC), which undoubtedly derive from 23,24-dimethylcholesterols in dinoflagellates, haptophytes and diatoms, provide a useful parameter to distinguish Paleozoic from Mesozoic and younger oil and rock extracts at higher specificity than previously proposed biomarkers. In this report, we present a study of the relative abundance of a novel series of TA-DMC in source rock extracts and crude oil from different global localities and ages. Based on their taxon specificity for important primary producers, such biogeochemicals also have implications for paleoenvironmental studies, including paleoclimate and global change, such as radiations following the Permian–Triassic boundary mass extinction.
ISSN:0146-6380
1873-5290
DOI:10.1016/j.orggeochem.2011.02.007