Highly aromatic character of biogeomacromolecules in Chitinozoa: A spectroscopic and pyrolytic study

Dutta, Suryendu; Brocke, Rainer; Hartkopf‐Fröder, Christoph; Littke, Ralf; Wilkes, Heinz; Mann, Ulrich

doi:10.1016/j.orggeochem.2007.06.014

Cited by 28 publications

(22 citation statements)

References 51 publications

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“…1,2,3,4-Tetramethylbenzene derived most probably from a diaromatic moities is the most abundant pyrolysis product of the chitinozoans. Diagnostic pyrolysis products related to chitin have not been detected in both studies and hence, it is unlikely that the primordial biomacromolecules of chitinozoans prior to fossilization were made of chitin (Dutta et al, 2007;Jacob et al, 2007). …”

Section: Chemical Alteration Of Chitinozoans During Diagenesismentioning

confidence: 95%

“…The macromolecular composition of chitinozoans has been elucidated recently (Dutta et al, 2007;Jacob et al, 2007). The two studies are based on five samples of low thermal maturity (T max 420-433 °C, equivalent to VR c 0.45-0.6 %).…”

Section: Chemical Alteration Of Chitinozoans During Diagenesismentioning

confidence: 99%

“…The two studies are based on five samples of low thermal maturity (T max 420-433 °C, equivalent to VR c 0.45-0.6 %). Dutta et al (2007) used µ-FTIR spectroscopy and Curie Point-pyrolysis-gas chromatography/mass spectrometry, while Jacob et al (2007) applied laser-pyrolysis-gas chromatography/mass spectrometry, µ-FTIR spectroscopy and laser µ-Raman spectroscopy.…”

Section: Chemical Alteration Of Chitinozoans During Diagenesismentioning

confidence: 99%

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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

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153

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Section: Chemical Alteration Of Chitinozoans During Diagenesismentioning

confidence: 95%

Section: Chemical Alteration Of Chitinozoans During Diagenesismentioning

confidence: 99%

Section: Chemical Alteration Of Chitinozoans During Diagenesismentioning

confidence: 99%

See 1 more Smart Citation

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

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153

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“…It is now apparent that phenols are not exclusively associated with organic remains of higher plants (e.g. Dutta et al. 2007).…”

Section: Discussionmentioning

confidence: 99%

“…1999) upon pyrolysis. Chitinozoans are exclusively marine microfossils which yield substantial amount of aromatic compounds including phenols upon pyrolysis (Dutta et al. 2007).…”

Section: Discussionmentioning

confidence: 99%

Macromolecular composition of Palaeozoic scolecodonts: insights into the molecular taphonomy of zoomorphs

Dutta

Hartkopf‐Fröder

Mann

et al. 2010

LET

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Dutta, S., Hartkopf‐Fröder, C., Mann, U., Wilkes, H., Brocke, R. & Bertram, N. 2010: Macromolecular composition of Palaeozoic scolecodonts: insights into the molecular taphonomy of zoomorphs. Lethaia, Vol. 43, pp. 334–343. Biogeochemistry and molecular taphonomy of biopolymers of marine zoomorphs are poorly known. In order to obtain insights into this issue we report on the biogeomacromolecular composition of hand‐picked, well‐preserved scolecodonts of Ordovician, Silurian and Devonian age using micro‐Fourier transform infrared (micro‐FTIR) spectroscopy, Curie point pyrolysis‐gas chromatography‐mass spectrometry (Cupy‐GC‐MS) and tetramethylammonium hydroxide (TMAH)‐assisted thermochemolysis‐GC‐MS. The present study reveals that scolecodonts are composed of both aliphatic and aromatic moieties. The micro‐FTIR spectra of scolecodonts are characterized by aliphatic CHx (3000–2800 and 1460–1450/cm) and CH3 (1375/cm) absorptions and aromatic C=C (1560–1610/cm) and CH (3050/cm and 700–900/cm) absorptions. The major pyrolysis products from the scolecodonts include aromatic hydrocarbons such as alkylbenzenes, alkylnaphthalenes and alkylphenols. Aliphatic hydrocarbons are represented by a homologous series of n‐alkenes and n‐alkanes. The compounds released upon thermochemolysis with TMAH are saturated and unsaturated fatty acids (as their methyl esters), n‐alkenes/alkanes and aromatic acids (as their methyl esters). No protein/amino acid‐derived compounds have been recognized in the pyrolysates or in the thermochemolysates, and it is concluded that protein/amino acid‐related compounds, which are commonly found in the jaws of extant polychaetes, were destroyed due to diagenetic processes. Obviously, excellent morphological preservation and low thermal alteration are not paralleled by a similar degree of chemical preservation. □Biogeomacromolecules, micro‐FTIR, pyrolysis‐GC‐MS, scolecodonts, thermochemolysis‐GC‐MS.

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Organic-Walled Microfossils

Saraswati

Srinivasan

2015

Micropaleontology

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Highly aromatic character of biogeomacromolecules in Chitinozoa: A spectroscopic and pyrolytic study

Cited by 28 publications

References 51 publications

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

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

Macromolecular composition of Palaeozoic scolecodonts: insights into the molecular taphonomy of zoomorphs

Organic-Walled Microfossils

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