Open AccessStudy of the features of brown coal by pétrographie analysis
Author(s) -
Н. И. Федорова,
N. A. Grabovaya,
Z. R. Ismagilov,
E. S. Mikhaylova
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1749/1/012031
Subject(s) - maceral , inertinite , vitrinite , liptinite , petrography , coal , vitrinite reflectance , mineralogy , maturity (psychological) , brown coal , reflectivity , geology , organic matter , chemistry , analytical chemistry (journal) , environmental chemistry , source rock , paleontology , psychology , developmental psychology , physics , organic chemistry , structural basin , optics
The paper presents the results of petrographic analysis of five samples of brown coals from the following deposits: Itatskoye, Munayskoye, Arkharo-Boguchanskoye, Kangalasskoye, Baganuur (Mongolia). It was found that the brown coal sample from the Itatskoye deposit (R o, r = 0.388%) has the lowest vitrinite reflectance, while the brown coal from the Kangalasskoye deposit has the highest reflectance value (Ro, r = 0.490%). An increase in the genetic maturity of the studied samples is associated with a change in the technological properties of their organic matter. It is shown that with an increase in R o, r , the carbon content (C daf ) increases, the yield of volatiles decreases, as well as the atomic ratio of H/C and O/C. Visual analysis of polished sections made it possible to determine the maceral composition of the studied coals. The sample of brown coal from the Baganuur deposit (Mongolia) has the highest inertinite content (more than 60%), the sample of the Kangalasskoye deposit contains the largest amount of vitrinite group macerals (86%).