Petrographic characteristics of coal from the Lati Formation, Tarakan basin, East Kalimantan, Indonesia

Petrographic and Geochemical Characterization of Coals from Tiru Valley, Nagaland, NE India

“…This leads to elevated ash coals, or Singh and Singh (1996) proposed a facies diagram which is based on maceral content as well as mineral matter content. Though this model was initially proposed for Rajmahal group of Permian Gondwana coals, yet it has been successfully applied to decipher the evolution of Late Miocene coals of Lati Formation of Tarakan basin, Indonesia (Singh et al, 2010). The petrographic data when plotted on this facies model (Fig.…”

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

“…Mean ulminite reflectance (R o ) measurements were performed with an Opton-Zeiss photometry system, which was calibrated against a sapphire standard with R o 0.585%. Maceral proportions were used to calculate facies indicators as defined by Diessel [47] and Calder et al [48] and modified by many others for low rank coal, e.g., Kalkreuth et al [49], Flores [50], Bechtel et al [33,[51][52][53], and Singh et al [39]. The gelification index (GI -gelified vs. ungelified macerals) and tissue preservation index (TPI -relative amount of preserved plant tissue vs. detrital matter) were calculated according to the following formulae:…”

“…These methods are widely applied in stratigraphic and paleoenvironmental studies [30][31][32][33][34][35][36][37][38][39]. However, studies of coals from the Czech Republic, integrating results from coal petrography and organic geochemistry, are rare and only partial, e.g., a study of duxite resin from Bílina (NBB) [40] and a study of the Cypris Member in the Sokolov basin [41].…”

Petrographic Considerations in Demineralization of Coal with Bacteria: A New Dimension in Understanding the Clean Coal Technology

“…The details of the area and the nature of the coal have been discussed by Singh et al (2010). The coal samples have been crushed and reduced in quantity in the laboratory.…”

“…Among the ultimate components these coals are dominated by carbon (64.2-73.9%, daf basis) while the elemental hydrogen, oxygen and nitrogen occur in small concentrations. The detailed petrographic and chemical characteristics have been discussed by Singh et al (2010). These coals have also been analysed for their major, minor and trace elements/metals concentration.…”