Maturation of lower palaeozoic kerogens from North Greenland
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Kerogen from Cambrian and Silurian sedimentary rocks (immature to postmature) from North Greenland has been studied by elemental analyses (C and H), X-ray diffraction (XRD) and infrared spectroscopy (i.r.). The change in the kerogen's structure [derived from the width of half height (WHH) of the (002) diffraction] and the content of functional groups (from characteristic absorption bands in the infrared spectra) suggest the following main processes of maturation: elimination of aliphatic CH2, CH3 groups (mature zone): elimination of aromatic CH groups [postmature (catagenesis) zone] and rearrangement of C ≠ C bonds [postmature (metagenesis) zone]. The maturity parameters derived from X-ray diffraction (WHH) and infrared spectroscopy (CH/CC-aliphatic/aromatic ratio) are applicable for maturity ranking in the mature to postmature (catagenesis) zones.
Originalsprog | Engelsk |
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Tidsskrift | Organic Geochemistry |
Vol/bind | 20 |
Udgave nummer | 3 |
Sider (fra-til) | 405-413 |
Antal sider | 9 |
ISSN | 0146-6380 |
DOI | |
Status | Udgivet - apr. 1993 |
ID: 240010261