Paleoenvironment of the upper Oligocene Trbovlje coal seam (Slovenia)

Relations of petrographical and geochemical parameters in the middle Miocene Lavanttal lignite (Austria)

“…lignite, subbituminous coal A) demonstrated that conclusive results could be obtained using a combination of petrographical and organic geochemical data (Bechtel et al, 2002a(Bechtel et al, , 2003a. In addition to the characterization of paleoenvironmental changes during coal formation, information about the coal-forming vegetation have been revealed from biomarker analyses (Bechtel et al, 2002a(Bechtel et al, , 2004. Combined geochemical and stable isotope studies on coal, xylite and extracted cellulose provided evidence about the parameters determining the carbon isotopic composition within lignite seams (Bechtel et al, 2002b(Bechtel et al, , 2003a.…”

Identification of organic matter in lignite samples from basins in the Czech Republic: Geochemical and petrographic properties in relation to lithotype

“…The yields <10% were found for the xylite rich and matrix coals. Low SOM yields are characteristic for woody macrofossils [56] and increase with decreasing cellulose content and increasing degree of gelification [57]. The published results suggest biogeochemical formation of hydrocarbons in wood during gelification as a result of enhanced microbial activity.…”

“…4), with the highest amount of SOM in the sample of resinite and waxy rich litpobiolith 2. The increasing trend of higher SOM yield with increasing liptinite maceral contents indicates that extract yield is predominantly governed by the amount of lipid-rich OM within lignite [33,52,56,57].…”

On the fundamental difference between coal rank and coal type

“…Modified from Mastalerz and Bustin (1993b). (Bechtel et al, 2004(Bechtel et al, , 2005. The diagnostic biomarkers of gymnosperms (i.e.…”