Examination of factors effecting the results of high temperature pyrolysis studies used to characterize non-soluble organic material of sedimentary rocks : critical evaluation of Gransch and Eisma's method

Pyrolysis examinations used to study disperse organic matter are review and evaluated here. The information content and use of CR/CT rations obtained by GRANSCH and EISMA'S method in connection with hydrocarbon prospecting problems are analysed here. Due to difficulties during the geochemical interpretation of CR/CT values obtained according to GRANSCH and EISMA the method had to be reevaluated critically. The effects of pyrolysis temperature upon the CR/CT rations are analysed on natural and artificial rock samples. The reasons underlying the decrease of CR/CT ratios at pyrolysis temperatures above 700 °C are examined