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title of the reference :
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Preliminary characterisation of porphyrins from the Gafsa Basin, Tunisia
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Publication Date:
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1990
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Author :
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Quirke J.M.E., Dale T., Britton, Yost R.A., Trichet Jean, Belayouni Habib
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Catalogue type :
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Livre
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Catalogue reference :
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(USA) Org. geochem. Preliminary characterisation of porphyrins from the Gafsa Basin, Tunisia evidence for metal-free benzo porphyrins from an immature sediment Five metal-free porphyrin fractions were isolated chromatographically from an immature chert of the Gafsa Basin (Paleocene, Tunisia). Each fraction was analysed by electron ionisation tandem mass spectrometry. In addition to the expected aetioporphyrin-III and deoxophylloerythroetioporphyrin (DPEP), an isomeric C(32)CAP porphyrin, which probably bears an extended isocyclic ring was also detected. A C(31)CAP component bearing one unsubstituted beta -position was isolated. C(33)and C(34)benzo-DPEP porphyrin as well as a C(33)tetrahydrobenzo-DPED porphyrin were also present, which indicates that such compounds are generated in immature sediments
Porphyrine ; Nickel ; Vanadium ; Pétrole ; Sédiment immature ; Paléogène ; Roche chimique ; Roche carbonée ; Fractionnement chimique ; Silexite ; Origine biogène ; Tunisie ; bassin Gafsa Trichet Jean Belayouni Habib Dale T. Britton Yost R.A. Quirke J.M.E. Roches Sédmentaires, Sédimentologie
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Indexation decimale :
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Roches Sédmentaires, Sédimentologie
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Keywords :
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Porphyrine ; Nickel ; Vanadium ; Pétrole ; Sédiment immature ; Paléogène ; Roche chimique ; Roche carbonée ; Fractionnement chimique ; Silexite ; Origine biogène ; Tunisie ; bassin Gafsa
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Summary :
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Five metal-free porphyrin fractions were isolated chromatographically from an immature chert of the Gafsa Basin (Paleocene, Tunisia). Each fraction was analysed by electron ionisation tandem mass spectrometry. In addition to the expected aetioporphyrin-III and deoxophylloerythroetioporphyrin (DPEP), an isomeric C(32)CAP porphyrin, which probably bears an extended isocyclic ring was also detected. A C(31)CAP component bearing one unsubstituted beta -position was isolated. C(33)and C(34)benzo-DPEP porphyrin as well as a C(33)tetrahydrobenzo-DPED porphyrin were also present, which indicates that such compounds are generated in immature sediments
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