New chlorophyll fossils from moroccan oil shales. Porphyrins derived from chlorophyll C3 or a related pigment?
✍ Scribed by J. Verne-Mismer; R. Ocampo; H.J. Callot; P. Albrecht
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- French
- Weight
- 274 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
Petroporphyrins showing both a free C-7 position and a C-l 3 to C-l 7 substitution pattern typical of chlorophyll c fossils were isolated from two Cretaceous Moroccan oil shales. They may arise from chlorophyll r+ or a related compound like the 7-fomtyl analog. The recent assignment of specific precursor chlorophyllfossil porphyrin pairs' has extended interest in porphyrin geochemistry.*~s This is illustrated by the structural determination of a series of pigments propose to arise from the diagenesis of algal chlorophyll c (1 and 2),4-e bacteriochlomphylls d 7 and chlorophyll b (31.6 COOH chlorophyll c COOR chlorophyll b R = Phytyl