Other
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992gecoa..56.2761l&link_type=abstract
Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 56, no. 7, July 1992, p. 2761-2788.
Other
1
Aromatic Compounds, Coal, Cretaceous Period, Cyclic Hydrocarbons, Geochemistry, Isomerization, Kerogen, Pyrolysis
Scientific paper
Data are presented on the distribution of diterpanes, triterpanes, steranes, and aromatic hydrocarbons in the natural bitumens extracted from unheated coals identified as Rocky Mountain coal (RMC), Australian Gippsland Latrobe Eocene coal (GEC), Australian Gippsland Latrobe Cretaceous coal (GCC), and Texas Wilcox lignite (WL), as well as from pyrolysates obtained from heating of these coals. It was found that pentacyclic triterpanes are dominant in GEC, GCC, and WL, whereas diterpanes strongly predominate in the bitumen of RMC, indicating that resin is a more important constituent of RMC than of the other coals and that it releases the diterpenoids at an early stage of diagenesis. It was also found that the composition of diterpanes is different among these coals and that the distributions of sterane and triterpane in the natural bitumen of coals are very different from those of pyrolysates.
Kaplan Isaac R.
Lu Shan-Tan
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