Hetényi Magdolna: Methods for measuring the maturity of organic matter in diagenese stage. In: Acta mineralogica-petrographica, (29). pp. 107-118. (1987)
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Several methods are used for measuring maturity of the organic matter. However, the degree of efficiency varies at different stages of the thermal maturity. During diagenesis and the beginning of catagenesis the fluorescence and O/C atomic ratio are considered to be the best indicators for characterizing the level of maturation. On the other hand, the techniques requiring long samplepreparation time can not be utilized as routiné tools. The aim of this paper is to propose a new applicability of a parameter measured by a generally accepted method. This parameter is the oxygen index determined by Rock Eval pyrolysis. According to the results presented in this report the OI linearly decreases with the maturation level during the diagenesis and early catagenesis. The correlation between oxygen index and maturity was experimentally demonstrated by laboratory thermal degradation of kerogen type I. Furthermore, the oxygen index has been proved to be an efficient indicator of coal rank from lignites to high vol. bitumenous coals: Applicability of the paramteres was checked on sedimentary organic materials of two boreholes. The oxygen index decreased linearly in function of advanced diagenesis during both artificial and natural evolution. The correlation between the OI and the depth or between the OI and the temperature of thermal degradation is satisfactory (r2 =0,81—0,99). The connection seems to be valid independently of the type of organic matter. On the basis of our present results, however, the parameter can only be used in the case of coals and sedimentary organic matter of high organic carbon content. Preferred evolution interval of its application ranges from about R0=0,2—0,3 per cent to J?o=0,7—0,8 per cent.
| Mű típusa: | Cikk, tanulmány, mű |
|---|---|
| Befoglaló folyóirat/kiadvány címe: | Acta mineralogica-petrographica |
| Dátum: | 1987 |
| Kötet: | 29 |
| ISSN: | 0365-8066 |
| Oldalak: | pp. 107-118 |
| Nyelv: | angol |
| Kiadó: | University of Szeged, Department of Mineralogy, Geochemistry and Petrology |
| Kiadás helye: | Szeged |
| Befoglaló mű URL: | http://acta.bibl.u-szeged.hu/39407/ |
| Kulcsszavak: | Kőzettan, Ásványtan, Földtan |
| Megjegyzések: | Bibliogr.: p. 117-118. ; ill. ; összefoglalás angol nyelven |
| Szakterület: | 01. Természettudományok 01. Természettudományok > 01.05. Föld- és kapcsolódó környezettudományok |
| Feltöltés dátuma: | 2016. okt. 17. 09:25 |
| Utolsó módosítás: | 2022. júl. 26. 13:45 |
| URI: | http://acta.bibl.u-szeged.hu/id/eprint/24762 |
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