Biomarkers in the Products of Lignite Humic Substances Thermochemolysis
2011
Stefanova, M., Institute of Organic Chemistry, Sofia (Bulgaria) | Marinov, S., Institute of Organic Chemistry, Sofia (Bulgaria)
Biomarker composition of bitumen-free humic acids from Thracian lignite was studied. TMAH thermochemolysis and methods of organic geochemistry were applied. A broad range of compounds were isolated and mass spectrometrically characterized. Species were classified according to abundance, possible source input and diagenetic transformation. The biomarker assemblage of lignite humic substances confirmed the predominant Gymnosperm origin of Maritza East coal forming vegetation. The high content of gymnospermous resins in Neogene lignites predicted at a certain extent their antiseptic properties and explained the preservation potential of humic acids towards source specific biomarkers. Angiospermae vegetation in humic acids structuring should not be neglected as well. Plants of Betulaceae family seemed to have been important in the Thracian palaeomire.
显示更多 [+] 显示较少 [-]