Porphyrins from Messel oil shale (Eocene, Germany): Structure elucidation, geochemical and biological significance, and distribution as a function of depth

Ocampo, R.; Bauder, Claude; Callot, H. J.; Albrecht, Pierre

doi:10.1016/0016-7037(92)90095-z

Cited by 57 publications

(34 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, they can also be linked or trapped in other types of macromolecular networks [2]. Several groups have isolated [8][9][10] and determined the structure of free porphyrins from geological sources (e.g., crude oils, oils shales, and coal) [11][12][13][14][15]. Those porphyrins were free bases or metal complexes,particularly involving Ni and V as V=O.…”

Section: Introductionmentioning

confidence: 99%

Development of a chromatographic methodology for the separation and quantification of V, Ni and S compounds in petroleum products

Vargas

Castillo

Ocampo-Torres

et al. 2017

Fuel Processing Technology

View full text Add to dashboard Cite

Additionally, the use of ultraviolet (UV)-visible spectroscopy allows the identification of fractions containing porphyrinic-type compounds by detecting the Soret band at 405 nm.The correlation between this two-step approach is to deduce both the distribution and nature of Ni and V complexes within the sample.This method reduces the complexity of petroleum matrices and producessimpler fractionsthat can be used for further studies.

show abstract

Section: Introductionmentioning

confidence: 99%

Development of a chromatographic methodology for the separation and quantification of V, Ni and S compounds in petroleum products

Vargas

Castillo

Ocampo-Torres

et al. 2017

Fuel Processing Technology

View full text Add to dashboard Cite

show abstract

“…17-nor-DPEP was detected from Moroccan oil shales from the Maastrichtian Age (71-66 Ma) (Verne-Mismer et al 1988 ). Me CPP and Carboxyl MeCPP were isolated from Messel oil shale (Eocene, 56-34 Ma) (Ocampo et al 1992 ). …”

Section: Biomarker Evidence About Invisible Marine Protistsmentioning

confidence: 99%

Oldest Fossil Records of Marine Protists and the Geologic History Toward the Establishment of the Modern-Type Marine Protist World

Suzuki

Oba

2015

Marine Protists

View full text Add to dashboard Cite

The oldest marine protist fossil goes back 1.8 Ga (Statherian, Paleoproterozoic), and the oldest dinosterane biomarkers 1.6 Ga (Calymmian, Mesoproterozoic). The probable heterotrophic agglutinated microfossil appeared when marine metazoans appeared in the Ediacaran. Multichambered foraminifers appeared around the start of biomineralization in Small Shelly Fossils in the early Cambrian. The fi rst fossilizable radiolarian polycystine is likely to have appeared in the period of the Cambrian Explosion. After the initial appearance period, the emergence of fossilizable skeleton formative ability was concentrated in fi ve short geological time intervals: (1) the Middle to Late Devonian for calcareous benthic foraminifers; (2) the Carnian to the Rhaetian (Triassic) for the "switching on" of fossilizable dinofl agellate cysts, nannoliths, coccoliths and calcareous cysts, and probably the molecular appearance of diatoms; (3) the Toarcian-Aalenian Ages for diversifi ed dinofl agellates and coccolithophores, the establishment of symbiosis in radiolarian Acantharia and the appearance of planktic lifestyle in foraminifers; (4) the Albian-Maastrichtian Ages for the rapid accumulation of coccolithophores, the start of skeletogenesis both in silicofl agellates and marine centric diatoms, molecular appearance of both araphid and raphid diatoms, and the appearance of fossilizable araphid diatoms; and (5) the middle to late Eocene for the appearance of fossilizable raphid diatoms and radiolarian colonial collodarians and the continuous occurrences of ebridians. The establishment of the modern-type marine protist world was concluded in the late Eocene by the appearance of collodarians, the continuous occurrences of ebridians, and the substituted silicon precipitation marine protists as diatoms.

show abstract

“…Sedimentary porphyrins are well preserved in organic-rich sediments, oil shales, and petroleum (e.g., Treibs, 1936;Baker and Louda, 1986;Callot and Ocampo, 2000). Because the structural characteristics of porphyrins reflect those of the source chloropigments, significant efforts have been made to assess the structure of porphyrins isolated from sediments with the aim of understanding their precursors and diagenetic transformation (Baker and Palmer, 1978;Ocampo et al, 1985Ocampo et al, , 1992Baker and Louda, 1986;Keely et al, 1988,798 Y. Kashiyama: N andC isotopes of porphyrins Maxwell, 1991;Sundararaman and Boreham, 1991;Gibbison et al, 1995;Callot and Ocampo, 2000). The stable isotopic compositions of nitrogen and carbon in porphyrins also provide critical information on their source organisms (Hayes et al, 1987;Boreham et al, 1989Boreham et al, , 1990Ocampo et al, 1989;Popp et al, 1989;Chicarelli et al, 1993;Keely et al, 1994;Ohkouchi et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of the biogeochemistry and ecology of photoautotrophs based on the nitrogen and carbon isotopic compositions of vanadyl porphyrins from Miocene siliceous sediments

et al. 2008

View full text Add to dashboard Cite

Abstract. We determined both the nitrogen and carbon isotopic compositions of various vanadyl alkylporphyrins isolated from siliceous marine sediments of the Onnagawa Formation (middle Miocene, northeastern Japan) to investigate the biogeochemistry and ecology of photoautotrophs living in the paleo-ocean. The distinctive isotopic signals support the interpretations of previous works that the origin of 17-nor-deoxophylloerythroetioporphyrin (DPEP) is chlorophylls-c 1−3 , whereas 8-nor-DPEP may have originated from chlorophylls-a 2 or b 2 or bacteriochlorophylla. Although DPEP and cycloheptanoDPEP are presumably derived from common precursory pigments, their isotopic compositions differed in the present study, suggesting that the latter represents a specific population within the photoautotrophic community. The average δ 15 N value for the entire photoautotrophic community is estimated to be -2 to +1‰ from the δ 15 N values of DPEP (-6.9 to -3.6‰; n=7), considering that the empirical isotopic relationships that the tetrapyrrole nuclei of chloropigments are depleted in 15 N by ∼4.8‰ and enriched in 13 C by ∼1.8‰ relative to the whole cells. This finding suggests that nitrogen utilized in the primary production was supplied mainly through N 2 -fixation by diazotrophic cyanobacteria. Based on the δ 13 C values of DPEP (-17.9 to -15.6‰; n=7), we estimated isotopic fractionation associated with photosynthetic carbon fixation to be 8-14‰. This range suggests the importance of β-carboxylation and/or active transport of Correspondence to: Y. Kashiyama (chiro@jamstec.go.jp) the carbon substrate, indicating in turn the substantial contribution of diazotrophic cyanobacteria to primary production. Based on the δ 15 N values of 17-nor-DPEP (-7.4 to -2.4‰; n=7), the δ 15 N range of chlorophylls-c-producing algae was estimated to be -3 to +3‰. This relative depletion in 15 N suggests that these algae mainly utilized nitrogen regenerated from diazotrophic cyanobacteria. Given that diatoms are likely to have constituted the chlorophylls-cproducing algae within the biogenic-silica-rich Onnagawa Formation, cyanobacteria-hosting diatoms may have been important contributors to primary production.

show abstract

Porphyrins from Messel oil shale (Eocene, Germany): Structure elucidation, geochemical and biological significance, and distribution as a function of depth

Cited by 57 publications

References 37 publications

Development of a chromatographic methodology for the separation and quantification of V, Ni and S compounds in petroleum products

Development of a chromatographic methodology for the separation and quantification of V, Ni and S compounds in petroleum products

Oldest Fossil Records of Marine Protists and the Geologic History Toward the Establishment of the Modern-Type Marine Protist World

Reconstruction of the biogeochemistry and ecology of photoautotrophs based on the nitrogen and carbon isotopic compositions of vanadyl porphyrins from Miocene siliceous sediments

Contact Info

Product

Resources

About