The vanadium isotopic constitution of petroleum asphaltenes: La Luna Formation (Venezuela).
High-resolution mass spectrometry indicates that the isotopic abundance of 50V of the Late Cretaceous La Luna petroleum asphaltenes of marine origin (highly enriched with V > 2000 ppm) is higher by about 3.5% than that of the inorganic source (VOSO4 x 5H2O, Merck). We propose that the difference in the 50V/51V values between the La Luna petroleum asphaltenes and the inorganic source can be best ascribed to the biological processing of seawater vanadium. The fact that the V isotopic compositions of petroleum asphaltenes vary over a very narrow range (2.46-2.52) suggests essentially the same (or similar) and fixed biological source of vanadium.
Premović
P I
PI
Department of Chemistry, Faculty of Science, University of Nis, Yugoslavia.
Tonsa
I R
IR
López
L
L
Pavlović
M S
MS
Nesković
O M
OM
LoMonaco
S
S
Dordević
D M
DM
Veljković
M V
MV
D006838:Hydrocarbons / Q000737:chemistry*; D007554:Isotopes; D013058:Mass Spectrometry / Q000379:methods; D010578:Petroleum; D014639:Vanadium / Q000737:chemistry* / Q000528:radiation effects; D014687:Venezuela
D006838:Hydrocarbons; D007554:Isotopes; D010578:Petroleum; D014639:Vanadium; C006647:asphalt