Mass and electron paramagnetic resonance spectrometric analyses of selected organic components of cretaceous shales of marine origin

Conference · Tue Mar 01 04:00:00 EST 1977 · Prepr., Div. Pet. Chem., Am. Chem. Soc.; (United States)

OSTI ID:7257957

Baker, E W; Huang, W Y; Palmer, S E; Rankin, J G

The combination of mass spectra and EPR allows one to discern the onset through completion of thermally dependent reactions. The studies reported give information on tetrapyrrole diagenesis. Analyses of marine sediments show that chlorins give way to free base porphyrins with aromatization complete at 1000 m depth. Initial homologous series generation of up to 4 members (C/sub 32/ to C/sub 29/) occurs during the chlorin-porphyrin transition. Metallization with either Ni or vanadyl occurs without preference, although nickel porphyrins have a wider distribution. As diagenesis progresses, rupture of the isocyclic ring of porphyrins of the DPEP series results in generation of the etio series. The porphyrins are the only likely precursors to the petroporphyrins. Petroporphyrins contain no information that relates a particular species to a particular chlorophyll. The maturity of a sediment can be determined by examination of the kerogen and tetrapyrrole pigments. The chemical events surrounding a Miocene intrusion into a Cretaceous shale can be reconstructed. (DLC)

• Research Organization: Northeast Louisiana Univ., Monroe
• OSTI ID: 7257957
• Conference Information: Journal Name: Prepr., Div. Pet. Chem., Am. Chem. Soc.; (United States) Journal Volume: 22:2
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040201* -- Oil Shales & Tar Sands-- Site Geology-- (-1989)
BITUMINOUS MATERIALS
BLACK SHALES
CARBONACEOUS MATERIALS
CARBOXYLIC ACIDS
CHEMISTRY
CHLOROPHYLL
DIAGENESIS
ELECTRON SPIN RESONANCE
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GEOCHEMISTRY
GEOLOGIC DEPOSITS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
KEROGEN
MAGNETIC RESONANCE
MASS SPECTROSCOPY
METALS
METAMORPHIC ROCKS
NICKEL
OIL SHALES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHYTOCHROMES
PIGMENTS
PORPHYRINS
RESONANCE
ROCKS
SHALES
SPECTROSCOPY
TRANSITION ELEMENTS
VANADIUM