Steranes and triterpanes in the Beacon Supergroup samples from southern Victoria Land in Antarctica

Journal Article · Thu Oct 01 00:00:00 EDT 1987 · Geochimica et Cosmochimica Acta; (USA)

DOI:https://doi.org/10.1016/0016-7037(87)90147-5· OSTI ID:7014636

Matsumoto, Genki I; Watanuki, Kunihiko ^[1]; Machihara, Tsutomu ^[2]; Suzuki, Noriyuki ^[3]; Funaki, Minoru ^[4]

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1. Univ. of Tokyo (Japan)
2. Japan National Oil Corp., Tokyo (Japan)
3. Shimane Univ. (Japan)
4. National Institute of Polar Research, Tokyo (Japan)

Steranes and triterpanes in Beacon Supergroup samples (sedimentary rock and silicified wood) from Allan Hills and Carapace Nunatak of southern Victoria Land in Antarctica were studied to elucidate sources of organic materials, sedimentary paleoenvironment and thermal history after deposition. Relative abundances of C{sub 27}, C{sub 28} and C{sub 29} steranes and visual kerogen results of Beacon Supergroup samples from Allan Hills imply that organic materials in the sedimentary paleoenvironments are contributed mainly by vascular plants with some influence of microorganisms, while those of the Carapace Nunatak sample may be largely due to fern spores. The pristane/phytane and pristane/heptadecane ratios of the samples were generally close to unity and between 0.50 and 0.99, respectively, suggesting that the sedimentary paleoenvironment was shallow lacustrine with alternating oxic and anoxic conditions.

• OSTI ID: 7014636
• Journal Information: Geochimica et Cosmochimica Acta; (USA), Vol. 51:10; ISSN 0016-7037
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
58 GEOSCIENCES
ANTARCTICA
SEDIMENTARY ROCKS
HYDROCARBONS
BIOLOGICAL MARKERS
MATURATION
KEROGEN
DEPOSITION
CARBON COMPOUNDS
CHEMICAL COMPOSITION
DIAGENESIS
GEOCHEMISTRY
GEOLOGIC FORMATIONS
GEOLOGIC HISTORY
MICROORGANISMS
ORGANIC MATTER
PLUTONIC ROCKS
SOURCE ROCKS
TEMPERATURE MEASUREMENT
ANTARCTIC REGIONS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
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IGNEOUS ROCKS
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ORGANIC COMPOUNDS
POLAR REGIONS
ROCKS
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580000 - Geosciences