Kerogen during

Peters KE, Rohrbach BG, Kaplan IR (1981) Carbon and hydrogen stable isotope variations in kerogen during laboratory-simulated thermal maturation. Am Assoc Petrol Geol Bull 65 501-508... 

Fig. 15. Infrared spectra showing evolution of microbial kerogen during burial (Tissot Welte, 1978) 241...

The results are described in several sections. The first section deals with gross variations in organic sulfur with maturity as determined by Py-GC. The relationship between organic sulfur and Rock-Eval Tmax is discussed in the second section. In the third section, yields from flash pyrolysis are used to determine kinetic parameters for the loss of precursors for organic sulfur and other compounds from the kerogen during maturation. The last section describes the maturity-related variations in organic sulfur pyrolysis products. 

Figure 5 Variation of sulfur isotope ratios with H/C ratios in original and residual kerogens during pyrolysis.

Larsen J.W., Parikh H., Michels R. (2002) Changes in the cross-link density of Paris Basin Toarcian kerogen during maturation. Org. Geochem. 33, 1143—52. 

Michels R., Landais P., Philp R.P., Torkelson B.E. (1995) Influence of pressure and the presence of water on the evolution of the residual kerogen during confined, hydrous pyrolysis, and high-pressure hydrous pyrolysis of Woodford Shale. Energy Fuels 9, 204—15. 

This paper deals with the chemical and isotopic evolution of type II-S kerogen during its thermal maturation. 

It is interesting to note that a considerable fraction of total DHP and phytol is present in bound form (Sun et al., 1998). This fraction becomes extractable only after saponification with KOH/ MeOH in sediments. Since there is a possibility that this fraction could be incorporated into kerogen during diagenesis, DHP in bound form may be an important intermediate to isoprenoid-derived moieties in kerogen. 

Kawamura K., Tannenbaum E., Huizinga B. and Kaplan I. R. (1986) Volatile organic acids generated from kerogen during laboratory heating. Geochem. J. 20, 51-59. 

Larsen, J.W. Li, Shang, Changes in the macromolecular structure of a Type 1 kerogen during maturation, Energy P e/s 1987,11, 897-901. 

Chemical changes in the structure of kerogen during simulated thermal maturation were investigated by ID and 2D ssNMR C NMR spee-troscopy. The spin counting technique was used to evaluate the share of observable carbon atoms with increasing hydrous pyrolysis temperature. ... 

Eglinton TI, Curtis CD, Rowland SJ (1987) Generation of water-soluble organic acids from kerogen during hydrous pyrolysis implications for porosity development. Mineral Mag 51 495-503... 

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