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Cretaceous-Tertiary boundary layer at Stevns Klint (Denmark): copper and copper(II) porphyrins
(Journal of the Serbian Chemical Society, 1999)
High concentrations (up to 4000 ppm) of copper(rr) porphyrins have been detected in the kerogen of the Cretaceous/Tertiary (KT) boundary informal type sediment, the Fish Clay, at Stevns Klint, Denmark. These pigments have ...
Vanadyl porphyrins in sedimentary kerogens/asphaltenes: Estimation of the concentration
(Journal of the Serbian Chemical Society, 1999)
A new, rapid method for determining the concentration of vanadyl porphyrins (VO2+-P) associated with the kerogen of bituminous sedimentary rocks, using electron spin resonance (ESR) is described. The method is simple, ...
Air oxidation of the kerogen/asphaltene vanadyl porphyrins: an electron spin resonance study
(Journal of the Serbian Chemical Society, 2000)
The thermal behavior of vanadyl porphyrins was studied by electron spin resonance during heating of kerogens, isolated from the La Luna (Venezuela) anti Serpiano (Switzerland) bituminous rocks, at 250 degrees C for 1 to ...
Geochemistry of the cretaceous-tertiary boundary (Fish clay) at Stevns Klint (Denmark): Ir, Ni and Zn in kerogen
(Journal of the Serbian Chemical Society, 2006)
Geochemical analyses of trace metals (Ir, Ni and Zn) in the kerogen of the black marl of the Cretaceous-Tertiary boundary succession (Fish Clay) at Stevns Klint (Hojerup Church) were undertaken. The data for this kerogen ...
Classification of the asphalts and their source rock from the Dead Sea Basin (Israel): the asphaltene/kerogen vanadyl porphyrins
(Journal of the Serbian Chemical Society, 1998)
The asphaltenes of the asphalts from the Dead Sea Basin were examined for the presence of vanadyl porphyrins. These examinations demonstrated that the asphalts fall into two broad class types, one having a relatively high ...
The Cretaceous-Tertiary boundary Fiskeler at Stevns Klint, Denmark: the geochemistry of the major trace metals
(Journal of the Serbian Chemical Society, 2001)
Trace metals in the four discrete layers of the Cretaceous-Tertiary boundary (Fiskeler) at Stevns Klint (Denmark) are relatively well studied, yet much remains to be learned about them. Therefore, an integrated study of ...
Cretaceous-paleogene boundary fish clay at hojerup (Stevns Klint, Denmark): Zn, Pb and PEE in kerogen
(Journal of the Serbian Chemical Society, 2008)
Geochemical analyses of Zn, Pb and rare earth elements (La, Ce, Nd, Sm, Eu, Tb, Yb and Lu) in the kerogen of the black marl at the Cretaceous - Paleogene boundary Fish Clay at Hojerup were performed. Substantial proportions ...