GEOCHEMICAL SIGNIFICANCE OF THE AROMATIC HYDROCARBON DISTRIBUTION IN THE BITUMENS OF THE PUERTOLLANO OIL SHALES, SPAIN

Citation
Ag. Borrego et al., GEOCHEMICAL SIGNIFICANCE OF THE AROMATIC HYDROCARBON DISTRIBUTION IN THE BITUMENS OF THE PUERTOLLANO OIL SHALES, SPAIN, Organic geochemistry, 26(3-4), 1997, pp. 219-228
Citations number
55
Categorie Soggetti
Geochemitry & Geophysics
Journal title
ISSN journal
01466380
Volume
26
Issue
3-4
Year of publication
1997
Pages
219 - 228
Database
ISI
SICI code
0146-6380(1997)26:3-4<219:GSOTAH>2.0.ZU;2-5
Abstract
The bituminous series of the Puertollano basin consists of three oil s hale beds named PA, PB and PC from top to bottom. In this work, result s from the study of the aromatic fractions of the bitumens are present ed. The gas chromatographic traces are dominated by phenanthrene deriv atives associated with variable contributions of arborane/fernane deri vatives and benzohopanes and, overall, small amounts of chrysene deriv atives and secohopanes. The compounds can be considered as part of two sub-groups: the first one consists of those compounds derived from re gular hopanes such as secohopanes, benzohopanes, fully aromatized hopa nes, and degradation products of hopanes such as alkylated chrysenes a nd naphthalenes. The second group is composed of arborane/fernane deri vatives and their degradation products such as alkylated phenanthrenes and tetrahydrophenanthrenes. Both groups of compounds appear to be in dicative of a strong bacterial input to the sedimentary organic matter . (C) 1997 Elsevier Science Ltd.