Paleoenvironmental implications of novel C30 steranes in Precambrian to Cenozoic Age petroleum and bitumen

Mark A. McCaffrey; J. Michael Moldowan; Paul A. Lipton; Roger E. Summons; Kenneth E. Peters; Alwarsamy Jeganathan; David S. Watt

doi:10.1016/0016-7037(94)90481-2

Paleoenvironmental implications of novel C₃₀ steranes in Precambrian to Cenozoic Age petroleum and bitumen

Mark A. McCaffrey, J. Michael Moldowan, Paul A. Lipton, Roger E. Summons, Kenneth E. Peters, Alwarsamy Jeganathan, David S. Watt

Molecular and Cellular Biochemistry

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

128 Scopus citations

Abstract

Petroleums and bitumens from Early Proterozoic (≈ 1800 Ma) to Miocene (≈ 15 Ma) age marine strata contain 24-isopropylcholestanes, a novel group of C₃₀ steroids. The abundance of these compounds, relative to 24-n-propylcholestanes, varies with source rock age. Late Proterozoic (Vendian) and Early Cambrian oils and/or bitumens from Siberia, the Urals, Oman, Australia, and India have a high ratio of 24-isopropylcholestanes to 24-n-propylcholestanes (≥1), while younger and older samples have a lower ratio (≤0.4). Temporal changes in this parameter may reflect the relative abundance of certain Porifera (sponges) and certain marine algae through time. Geochemical indicators such as this, which can constrain the source rock age of a migrated oil, are useful in source rock identification during petroleum exploration.

Original language	English
Pages (from-to)	529-532
Number of pages	4
Journal	Geochimica et Cosmochimica Acta
Volume	58
Issue number	1
DOIs	https://doi.org/10.1016/0016-7037(94)90481-2
State	Published - Jan 1994

ASJC Scopus subject areas

Geochemistry and Petrology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/0016-7037(94)90481-2

Cite this

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title = "Paleoenvironmental implications of novel C30 steranes in Precambrian to Cenozoic Age petroleum and bitumen",

abstract = "Petroleums and bitumens from Early Proterozoic (≈ 1800 Ma) to Miocene (≈ 15 Ma) age marine strata contain 24-isopropylcholestanes, a novel group of C30 steroids. The abundance of these compounds, relative to 24-n-propylcholestanes, varies with source rock age. Late Proterozoic (Vendian) and Early Cambrian oils and/or bitumens from Siberia, the Urals, Oman, Australia, and India have a high ratio of 24-isopropylcholestanes to 24-n-propylcholestanes (≥1), while younger and older samples have a lower ratio (≤0.4). Temporal changes in this parameter may reflect the relative abundance of certain Porifera (sponges) and certain marine algae through time. Geochemical indicators such as this, which can constrain the source rock age of a migrated oil, are useful in source rock identification during petroleum exploration.",

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AU - McCaffrey, Mark A.

AU - Michael Moldowan, J.

AU - Lipton, Paul A.

AU - Summons, Roger E.

AU - Peters, Kenneth E.

AU - Jeganathan, Alwarsamy

AU - Watt, David S.

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