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Journal Article

Biogeochemical evidence for the presence of the angiosperm molecular fossil oleanane in Paleozoic and Mesozoic non-angiospermous fossils

David Winship Taylor, Hongqi Li, Jeremy Dahl, Fred J. Fago, David Zinniker, J. Michael Moldowan
Journal: Paleobiology
Published: 01 March 2006
Paleobiology (2006) 32 (2): 179–190.
DOI: https://doi.org/10.1666/0094-8373(2006)32[179:BEFTPO]2.0.CO;2
... of oleanane. This includes the development of methods using zeolites to preferentially reduce hopanes that can co-elute with oleanane. The presence of this molecular fossil strongly correlates with angiosperm diversification; in its functionalized form, along with its triterpenoid precursors, it is found...
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Plot of the <span class="search-highlight">oleanane</span> index (<span class="search-highlight">oleanane</span>&#x2F;[<span class="search-highlight">oleanane</span> + 30αβ-hopane]) ( Moldowan e...

Plot of the oleanane index (oleanane/[oleanane + 30αβ-hopane]) ( Moldowan e...

Published: 01 June 2010
Figure 14 Plot of the oleanane index (oleanane/[oleanane + 30αβ-hopane]) ( Moldowan et al., 1994 ) vs. the ratio of the percentages of C 28 ββS steranes to C 29 ββS steranes ( Grantham and Wakefield, 1988 ; Schwark and Empt, 2006 ). The diagram suggests ages as young as Tertiary for the sample
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Crossplot of nordiacholestanes ratios versus <span class="search-highlight">Oleanane</span>&#x2F;<span class="search-highlight">Oleanane</span> + hopane con...

Crossplot of nordiacholestanes ratios versus Oleanane/Oleanane + hopane con...

Published: 11 December 1999
Fig. 12 Crossplot of nordiacholestanes ratios versus Oleanane/Oleanane + hopane content for Niger Delta and Foz do Amazonas oil types
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Figure 1. Representative analysis of <span class="search-highlight">oleanane</span> by GC-MS-MS from one Upper P...

Figure 1. Representative analysis of oleanane by GC-MS-MS from one Upper P...

Published: 01 March 2006
Figure 1. Representative analysis of oleanane by GC-MS-MS from one Upper Permian sample (L9448) containing gigantopterid remains. The chromatograms show the oleanane peaks for the m/z 412 → 397 (upper) and m/z 412 → 191 (lower) spectral fragments before (A) and after (B) treatment of a saturate
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<span class="search-highlight">Oleanane</span> distribution in oils through the field ( a ) and thermal maturity ...

Oleanane distribution in oils through the field ( a ) and thermal maturity ...

Published: 01 July 2020
Fig. 5. Oleanane distribution in oils through the field ( a ) and thermal maturity ( b ) of the source rocks determined by a cross plot of the Ts/(Ts + Tm) ratios vs. Ol/C 30 H.
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Correlation of <span class="search-highlight">oleanane</span>&#x2F;C 30 hopane and C 35 &#x2F;(C 31 –C 35 ) homohopane of ...

Correlation of oleanane/C 30 hopane and C 35 /(C 31 –C 35 ) homohopane of ...

Published: 01 May 2018
Fig. 6. Correlation of oleanane/C 30 hopane and C 35 /(C 31 –C 35 ) homohopane of crude oils.
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<span class="search-highlight">Oleanane</span>&#x2F;hopane and C 19 &#x2F;C 23 tricyclic terpane ratios are indicative of ...

Oleanane/hopane and C 19 /C 23 tricyclic terpane ratios are indicative of ...

Published: 01 January 2016
Figure 6. Oleanane/hopane and C 19 /C 23 tricyclic terpane ratios are indicative of higher-plant input during source-rock deposition ( Peters et al., 2005 ). High oleanane/hopane ratios for the Los Angeles basin oil samples (especially tribes 1 and 2) are consistent with angiosperm input
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Plot of selected biomarker ratios (tricyclics, <span class="search-highlight">oleanane</span>, tetracyclic polypr...

Plot of selected biomarker ratios (tricyclics, oleanane, tetracyclic polypr...

Published: 01 August 2015
Figure 12 Plot of selected biomarker ratios (tricyclics, oleanane, tetracyclic polyprenoids (TPP), diasteranes and homohopanes), showing differences between marine- and terrigenous-sourced oils. Oleanane and TPP are thought to be higher plant- and freshwater algae-markers, respectively, whereas
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Mass fragmentograms ( m &#x2F; z 191 and m &#x2F; z 412) of hopanes and <span class="search-highlight">oleanane</span> i...

Mass fragmentograms ( m / z 191 and m / z 412) of hopanes and oleanane i...

Published: 10 December 2007
Fig. 5. Mass fragmentograms ( m / z 191 and m / z 412) of hopanes and oleanane in surface oil sample (Cape Gorevoi Utes).
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Table 1.  Results of the analyses examining the presence of <span class="search-highlight">oleanane</span> in pro...

Table 1.  Results of the analyses examining the presence of oleanane in pro...

Published: 01 March 2006
Table 1.  Results of the analyses examining the presence of oleanane in progymnosperm fossils, seed plant fossils, heterogeneous plant fossil samples, associated coals, and rock samples. YPM = Yale Peabody Museum; OUPH = Ohio University Paleobotanical Herbarium.
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Correlation between T s &#x2F;(T s + T m ) ratios, <span class="search-highlight">oleanane</span>&#x2F;C 30 hopane ratios...

Correlation between T s /(T s + T m ) ratios, oleanane/C 30 hopane ratios...

Published: 01 November 2005
Figure 11 Correlation between T s /(T s + T m ) ratios, oleanane/C 30 hopane ratios, and diasterane/sterane ratio suggests that organic facies change is an influential factor in the variation of biomarker parameters but not an issue for Talara oils. Divergent point in the upper right of each
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Distribution maps for <span class="search-highlight">oleanane</span> index and NDR. Notice the compensatory aspec...

Distribution maps for oleanane index and NDR. Notice the compensatory aspec...

Published: 01 November 2005
Figure 10 Distribution maps for oleanane index and NDR. Notice the compensatory aspect to their distributions, suggesting lateral facies changes in the source rocks.
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The decrease in <span class="search-highlight">oleanane</span> to C30 hopane ratio to the south suggests a decrea...

The decrease in oleanane to C30 hopane ratio to the south suggests a decrea...

Published: 01 August 2004
Figure 6. The decrease in oleanane to C30 hopane ratio to the south suggests a decreased contribution of oleanane-bearing Eocene-sourced hydrocarbons. An increase in sulfur-bearing benzothiophenes (BT+DBT+MDBT) to the south suggests an increase to the south of marine Jurassic-sourced
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(A) Comparison of two source parameters, the <span class="search-highlight">oleanane</span> index (OI) and the pr...

(A) Comparison of two source parameters, the oleanane index (OI) and the pr...

Published: 01 July 2003
Figure 2 (A) Comparison of two source parameters, the oleanane index (OI) and the pristane/phytane ratios (Pr/Ph) for oils from the regional Niger Delta and from the joint venture acreage studied in this paper. High OI and high Pr/Ph are both indicators of higher terrestrial land plant input. (B
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—Plot of <span class="search-highlight">oleanane</span> vs. C 30 sterane (24- n -propylcholestane) ratios separa...

—Plot of oleanane vs. C 30 sterane (24- n -propylcholestane) ratios separa...

Published: 11 December 1999
Figure 9 —Plot of oleanane vs. C 30 sterane (24- n -propylcholestane) ratios separates oil groups. Oleanane ratios for oils greater than 0.20 indicate Tertiary source rocks (groups 2 and 3), whereas the absence of oleanane is consistent with a Jurassic or older source (group 4). C 30 24- n
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GC-MS-MS (m&#x2F;z 412-191) traces showing representative age related <span class="search-highlight">oleanane</span> d...

GC-MS-MS (m/z 412-191) traces showing representative age related oleanane d...

Published: 11 December 1999
Fig. 10 GC-MS-MS (m/z 412-191) traces showing representative age related oleanane distribution in Foz do Amazonas oil types ( Mello, 1988 )
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Crossplot of <span class="search-highlight">Oleanane</span> index versus C29 sterane content for Niger Delta and ...

Crossplot of Oleanane index versus C29 sterane content for Niger Delta and ...

Published: 11 December 1999
Fig. 14 Crossplot of Oleanane index versus C29 sterane content for Niger Delta and Foz do Amazonas oil types types
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* BIO = biodegraded. The <span class="search-highlight">oleanane</span> index and homohopane index are not report...

* BIO = biodegraded. The oleanane index and homohopane index are not report...

Published: 11 October 1994
* BIO = biodegraded. The oleanane index and homohopane index are not reported for Beaufort samples with biodegradation ranks ≥ 5 ( Table 1 ). † Calculated as [the sum of the 17α and 17β, 24,28-bisnorlupane peak areas on m/z 341]/[the oleanane peak area on m/z = 191]. †† ND = no data
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—Regional variation in crude oil C 28 -bisnorhopane&#x2F;<span class="search-highlight">oleanane</span> biomarker rati...

—Regional variation in crude oil C 28 -bisnorhopane/oleanane biomarker rati...

Published: 01 June 1990
Figure 11 —Regional variation in crude oil C 28 -bisnorhopane/oleanane biomarker ratios (shown in parentheses) overlain with generalized migration trends. Long-range lateral migration is most significant in the Wilcox trend from south-central Louisiana northward to central Louisiana
Journal Article

A molecular biomarker for end-Permian plant extinction in South China

Chunjiang Wang, Henk Visscher
Journal: Geology
Published: 30 August 2021
Geology (2021) 49 (12): 1489–1494.
DOI: https://doi.org/10.1130/G49123.1
... molecular degradation products of pentacyclic triterpenoids with oleanane carbon skeletons, diagnostic for the Permian plant genus Gigantopteris . We identified a continuous quantitative record of mono-aromatic des -A-oleanane, which abruptly ends in the main marine extinction interval just below...
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