Kerogen labile

Figure 16.4 Comparison of the character [513C, 14C age, and organic carbon (OC)/surface area ratio] of POC collected in the (a) Eel (USA) and (b) Amazon rivers. In the Eel, sorption of marine OC on riverine particles, which have lost very little kerogen as they enter the coast, account for the decrease in age of particles with increasing distance from shore. Conversely, as particles selectively lose young labile terrestrial OC on the coast there is an increase in the age of these particles with increasing distance, since they are not completely reloaded with marine OC.

Figure 3.8 Calculated relative concentrations of a) labile kerogen b) oil and c) refractory kerogen as a function of temperature and heating rate (after Quigley et al., 1987. Reprinted by permission of Editions Technip).

Fig. 5.62 Maturity-related variations in the relative abundance and isotopic composition of methane (after Clayton 1991).The effects of increasing maturation and migration are shown by arrows the maturity of labile kerogen is represented by the degree of gas generation, and of refractory kerogen by vitrinite reflectance.

Kinetic model Labile kerogen Stabile kerogen Kinetic from asphaltenes (34/4-7) MSSV-pyrolysis (Erdmann. 1999) ... 

Fig. 3. Kinetic signature of the Draupne Source Rock in the study area. The kinetic signature of the asphaltene fraction compared with measured extremes of bulk kerogen kinetic variability (labile and stable) as well as closed system compositional kinetics from Erdmann (1999).

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