Fluorescence properties of Palaeozoic oil-prone alginite in relation to hydrocarbon generation, Williston Basin, Saskatchewan, Canada

Stasiuk, Lavern D.

doi:10.1016/0264-8172(94)90098-1

Cited by 27 publications

(5 citation statements)

References 19 publications

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“…The fluorescence of alginite shows variable )~max values that typically range from 520 to 580 nm. It has been documented that Type II kerogen approaches peak oil generation when Xmax of Tasmanites/Leiosphaeridia alginite is near 600 nm (Stasiuk, 1994, Stasiuk andFowler, 1994). Accordingly, the recorded range of Xmax would imply marginal maturity, in agreement with other maturity parameters, but values of 500 nm typical for immature organic matter were also observed.…”

Section: Kerogen Type and Thermal Maturitysupporting

confidence: 61%

Compositional variability of crude oils and source kerogen in the Silurian carbonate-evaporite sequences of the eastern Michigan Basin, Ontario, Canada

Obermajer

Fowler

Snowdon

et al. 2000

Bulletin of Canadian Petroleum Geology

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Biomarker analyses were conducted on a suite of oil and rock samples from the Middle Silurian Guelph-Salina interval in southern Ontario. The oils occurring in the Guelph reef reservoirs have a distinct biomarker composition (e.g. high concentrations of acyclic isoprenoids with phytane greater than pristane, abundant gammacerane, prominent C34 and C35 homohopanes) which not only indicates a single oil family, but also suggests a carbonate source rock deposited in a hypersaline, strongly reducing environment.Analyses of the extracts of rock samples from brown, laminated dolostone lithofacies occurring in the stratigraphically adjacent Guelph-Salina strata show that they have compositional similarities to the majority of the reef-hosted oils. These rocks contain significant amounts of marine Type II kerogen (TOC values ranging from 0.5 to 3.5%) and have good source potential. Though most of the organic matter is amorphous in nature, a structured, identifiable algal component is also common. A broad distribution of n-paraffins, with a relatively high concentration of C21 + members and abundant acyclic isoprenoids are typical in the organic extracts, suggesting a contribution from microbial organisms. A strong predominance of phytane over ptistane in the Salina extracts suggests highly anoxic bottom waters and/or hypersaline conditions. Reducing conditions are further suggested by a broad C31-C35 extended hopane profile with prominent C34 homohopane and a high concentration of gammacerane. The overall geochemical similarities among the examined rock samples indicate periods of recurrence of back-reef lagoonal and inter-biohermal paleodepositional conditions during the deposition of both the Guelph Platform and Salina Group carbonates.Geochemical correlation of the extracts and oils indicates that they are genetically related. Although geochemical maturity parameters suggest that the kerogen is only marginally mature, the presence of bitumen and hydrocarbon fluid inclusions in the Guelph samples suggest that early generation of hydrocarbons has occurred in this stratigraphic interval. The Salina extracts occurring in close proximity to reefs show a closer resemblance to the oils (Pr/Ph

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Section: Kerogen Type and Thermal Maturitysupporting

confidence: 61%

Compositional variability of crude oils and source kerogen in the Silurian carbonate-evaporite sequences of the eastern Michigan Basin, Ontario, Canada

Obermajer

Fowler

Snowdon

et al. 2000

Bulletin of Canadian Petroleum Geology

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“…However, fluorescence properties of prasinophytes are not only dependent on thermal maturity but vary also between prasinophytes derived from Palaeozoic and Mesozoic sedimentary rocks which may be due to macromolecular differences (Stasiuk, 1994b). …”

Section: Accepted Manuscriptmentioning

confidence: 99%

Optical thermal maturity parameters and organic geochemical alteration at low grade diagenesis to anchimetamorphism: A review

Hartkopf‐Fröder

Königshof

Littke

et al. 2015

International Journal of Coal Geology

156

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“…Other maceral groups such as vitrinite and inertinite do not fluoresce. Liptinite is composed of degraded lipids and other low-molecular-weight compounds that have been incorporated into complex geopolymers by condensation and defunctionalization reactions (Stasiuk, 1994). These geopolymers, along with selectively preserved biopolymers that are resistant to microbial degradation (such as hopanoids) (Tegelaar et al, 1989) and highly aliphatic macromolecules in the cell walls of cyanobacteria (Chalansonnet et al, 1988), are likely important contributors to the immature kerogen in the microfossils and the finely dispersed kerogen in the streamer biofabric.…”

Section: Immature Kerogen Of Permineralized Cyanobacterial Microfossilsmentioning

confidence: 99%

Production and Early Preservation of Lipid Biomarkers in Iron Hot Springs

et al. 2014

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The bicarbonate-buffered anoxic vent waters at Chocolate Pots hot springs in Yellowstone National Park are 51-54°C, pH 5.5-6.0, and are very high in dissolved Fe(II) at 5.8-5.9 mg/L. The aqueous Fe(II) is oxidized by a combination of biotic and abiotic mechanisms and precipitated as primary siliceous nanophase iron oxyhydroxides (ferrihydrite). Four distinct prokaryotic photosynthetic microbial mat types grow on top of these iron deposits. Lipids were used to characterize the community composition of the microbial mats, link source organisms to geologically significant biomarkers, and investigate how iron mineralization degrades the lipid signature of the community. The phospholipid and glycolipid fatty acid profiles of the highest-temperature mats indicate that they are dominated by cyanobacteria and green nonsulfur filamentous anoxygenic phototrophs (FAPs). Diagnostic lipid biomarkers of the cyanobacteria include midchain branched mono- and dimethylalkanes and, most notably, 2-methylbacteriohopanepolyol. Diagnostic lipid biomarkers of the FAPs (Chloroflexus and Roseiflexus spp.) include wax esters and a long-chain tri-unsaturated alkene. Surprisingly, the lipid biomarkers resisted the earliest stages of microbial degradation and diagenesis to survive in the iron oxides beneath the mats. Understanding the potential of particular sedimentary environments to capture and preserve fossil biosignatures is of vital importance in the selection of the best landing sites for future astrobiological missions to Mars. This study explores the nature of organic degradation processes in moderately thermal Fe(II)-rich groundwater springs--environmental conditions that have been previously identified as highly relevant for Mars exploration.

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Fluorescence properties of Palaeozoic oil-prone alginite in relation to hydrocarbon generation, Williston Basin, Saskatchewan, Canada

Cited by 27 publications

References 19 publications

Compositional variability of crude oils and source kerogen in the Silurian carbonate-evaporite sequences of the eastern Michigan Basin, Ontario, Canada

Compositional variability of crude oils and source kerogen in the Silurian carbonate-evaporite sequences of the eastern Michigan Basin, Ontario, Canada

Optical thermal maturity parameters and organic geochemical alteration at low grade diagenesis to anchimetamorphism: A review

Production and Early Preservation of Lipid Biomarkers in Iron Hot Springs

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