OOIR: Observatory of International Research

Papers

(The H4-Index of International Journal of Coal Geology is 34. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-09-01 to 2025-09-01.)

Article	Citations
Editorial Board	177
Organic matter accumulation, paleoenvironment and kerogen structure of the Middle Jurassic Dameigou Formation, Qaidam Basin: Evidence from organic petrography and geochemistry	73
Interlaboratory study: Testing reproducibility of solid biofuels component identification using reflected light microscopy	67
Organic petrography and geochemistry of the Lower-Carboniferous coals from the Ekibastuz Basin, Kazakhstan	67
Scanning electron microscopic evaluation of broad ion beam milling effects to sedimentary organic matter: Sputter-induced artifacts or naturally occurring porosity?	61
The implementation of subterranean barriers with mine pre-drainage to reduce coal mine methane emissions from open-cut and underground metallurgical-coal mines	59
Component identification of solid biomass fuels using reflected light microscopy: Interlaboratory study 2	58
Integrated stratigraphy of an Upper Miocene lignite-bearing succession based on wireline log, seismic and organic petrographic data in the Tiszapalkonya-1 core section, NE Hungary	53
Editorial of the special issue: The 2023 joint 74th ICCP and 39th TSOP meeting: Organic petrology in the energy transition era: Challenges ahead	52
Implications of element enrichment in paralic coals from the Carboniferous in England	51
Deep-basin gas generation via organic–inorganic interactions: New insights from redox-controlled hydrothermal experiments at elevated temperature	51
Effects of acid concentration on the recovery of rare earth elements from coal fly ash	48
Intelligent classification of coal structure using multinomial logistic regression, random forest and fully connected neural network with multisource geophysical logging data	47
Deposition of atmospheric polycyclic aromatic hydrocarbons in rural areas: Current data and historical record from an ombrotrophic peatland	46
Organic matter accumulation mechanisms in the Wufeng-Longmaxi shales in western Hubei Province, China and paleogeographic implications for the uplift of the Hunan-Hubei Submarine high	46
Editorial Board	45
Petrology and geochemistry of Devonian cutinitic liptobioliths from northwestern China	44
Structure and morphology of chars and activated carbons obtained from thermal treatment of coal and biomass origin materials, including their wastes: Results from the ICCP Microscopy of Carbon Materia	42
Characterizing hydrocarbon-bearing fluid inclusions using CLSM-based microspectrometry with application to the Upper Permian rock salt in the Gorleben and Morsleben sites, Germany	41
Wood-degrading fungal origin of perylene in peatlands of southern Poland: A molecular and statistical approach	40
Distribution of Li, Ga, Nb, and REEs in coal as determined by LA-ICP-MS imaging: A case study from Jungar coalfield, Ordos Basin, China	40
Comparative metabolomic reveals chemotaxonomic markers of resin fossils for identification of botanical origins	39
Editorial Board	39
Application of organic petrology and chemistry in forensic studies of solid waste sites	38
Petrographic and geochemical signatures of the Upper Permian Gondwana coals: Newcastle Coal Measures, Northern Sydney Basin, Australia	37

Effect of ScCO2-H2O treatment duration on the microscopic structure of coal reservoirs: Implications for CO2 geological sequestration in coal	37
Physicochemical characteristics and oxidative potential of size-segregated respirable coal mine dust: Implications for potentially hazardous agents and health risk assessment	36
The occurrence of elevated δ34S in dissolved sulfate in a multi-level coal mine water system, Glasgow, UK	36
Geochemical influences on methanogenic groundwater from a low rank coal seam gas reservoir: Walloon Subgroup, Surat Basin	36
Ranking the oil contribution of individual layers in a lacustrine shale oil system based on non-hydrocarbon analysis by FT-ICR MS	36
A comprehensive review of deep coalbed methane and recent developments in China	36
Simultaneous enhanced oil recovery, CCUS and UHUS in shale oil reservoirs	36
The molecular model of Marcellus shale kerogen: Experimental characterization and structure reconstruction	35
Cooper Basin REM gas shales after CO2 storage or acid reactions: Metal mobilisation and methane accessible pore changes	34
Organic matter variations in the deep marginal basin of the Western Tethys and links to various environments in isotopic Albian–Cenomanian Boundary Interval	34