Geochemical characterization of sedimentary organic matter by means of pyrolysis kinetic parameters

Tectonically induced climate and its control on the distribution of depositional systems in a continental foreland basin, Cloverly and Lakota Formations (Lower Cretaceous) of Wyoming, U.S.A.

“…Presence of Type III kerogen indicates terrestrially derived organic matter (Delvaux et al, 1990). Reducing conditions probably existed on inundated portions of floodplains where stagnant water with low concentrations of dissolved oxygen enhanced the preservation of terrestrial organic matter.…”

“…Baked quartz sand was pulverized in the ball mill between the processing of each mudrock sample to minimize contamination and to remove any sample residues. The kerogen type of the organic matter in the carbonaceous mudrocks was determined by analyzing 85 mg of powdered sample on a Rock Eval 6 using standard procedures (Delvaux et al, 1990).…”

“…6B,D), pseudo-slickensides (Fig. 6C), Delvaux et al (1990) for Rock Eval pyrolysis. The organic matter in the carbonaceous mudrocks of the Cloverly Formation exhibit low hydrogen indices and variable oxygen indices, typical of woody plant tissue (Type III kerogen).…”

Kinetics of oil group-type generation and expulsion: An integrated application to Dongying Depression, Bohai Bay Basin, China

“…The progress of hydrocarbon generation can be predicted by determining the activation energy distribution and the frequency factor on the basis of pyrolysis experiments. Conventional kinetic models use either a single activation energy and frequency factor set (Welte and Yalcin, 1988), or multiple activation energies with a single frequency factor (Tissot et al, 1978;Delvaux et al, 1990;Reynolds et al, 1995;Dieckmann, 1998;Schenk and Horsfield, 1998;Vandenbroucke et al, 1999), to model hydrocarbon generation. Models containing a distribution of activation energy values and a distribution of frequency factor values have also been applied (Dieckmann et al, 2002;Dieckmann, 2005).…”

Charring and non-additive chemical reactions during ramped pyrolysis: Applications to the characterization of sedimentary and soil organic material

“…How such alterations affect the chronology, stability and age distribution of SOM is not well understood. Understanding pyrolysis chemistry and kinetics and their effects on the overall thermal decomposition of SOM during pyrolysis is important for interpreting 14 C data (chronology and age distribution) and inferring the stability (Delaux et al, 1989) of SOM.…”