OOIR: Observatory of International Research

Papers

(The H4-Index of International Journal of Coal Geology is 30. 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 2021-02-01 to 2025-02-01.)

Article	Citations
Differential graphitization of organic matter in coal: Some new understandings from reflectance evolution of meta-anthracite macerals	64
Kerogen composition and origin, oil and gas generation potential of the Berriasian Wealden Shales of the Lower Saxony Basin	58
Changes in chemistry of vitrinite in coal through time: Insights from organic functional group characteristics	54
Preservation of organic carbon in the Cretaceous Hue Shale on the North Slope of Alaska: Insights from pyrite morphology	50
Soft modelling of the Hardgrove grindability index of bituminous coals: An overview	48
Hydrocarbon potential and Organofacies of the Devonian Antrim Shale, Michigan Basin	48
Methane absorption of coal-measure shales with and without pore water from the Qinshui Basin, North China: Based on high-pressure methane absorption experiments	44
Middle Jurassic lacustrine source rocks controlled by an aridification event: A case study in the northern Qaidam Basin (NW China)	43
Pore systems and their correlation with oil enrichment in various lithofacies of saline lacustrine shale strata	43
Geochemical characteristics and formation mechanism of organic-rich source rocks of mixed sedimentary strata in continental saline lacustrine basin: A case study of Permian Pingdiquan formation in the	43
Contrasts in maceral textures in progressive metamorphism versus near-surface hydrothermal metamorphism	40
The implementation of subterranean barriers with mine pre-drainage to reduce coal mine methane emissions from open-cut and underground metallurgical-coal mines	39
Effects of geochemical compositional heterogeneities on hydrocarbon expulsion and thermal maturation: An analog study of Maastrichtian source rocks from Jordan	37
Influence of magmatic fluids on the organic and inorganic fractions of coals from the Peñarroya-Belmez-Espiel Basin (Spain)	37
Chemo-hydro-mechanical effects of CO2 injection into a permeable limestone	36
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	35
Geomechanical characterization and mineralogical correlation of compositionally diverse world-class Kazakhstani source rocks: Insights from nanoindentation testing	35
Decoupling experiments for CH4 “diffusion-seepage” in coal columns to effectively measure sorption time	34
Editorial Board	34
Recognition and (semi-)quantitative analysis of REE-bearing minerals in coal using automated scanning electron microscopy	33
Petrology and geochemistry of the Fire Clay coalbed, Martin County, Inez 7 ½′ quadrangle, Kentucky, USA	33
Evaluation of elemental affinities in coal using agglomerative hierarchical clustering algorithm: A case study in a thick and mineable coal seam (kM2) from Soma Basin (W. Turkey)	33
Organic petrography and stable isotopic characteristics of Permian Talcher coal, India: Implications on depositional environment	31
Proceedings of the 37th Annual Meeting of the Society for Organic Petrology	31
Pore systems and organic petrology of cretaceous Mowry and Niobrara source-rock reservoirs, Powder River Basin, Wyoming, USA	31

Differences and origins of hydrocarbon generation characteristics between mudstone and shale in the Seventh Member of the Yanchang Formation, Ordos Basin, China	30
Revisiting the petrology of lower Pennsylvanian (Namurian and Langsettian) coals in southern West Virginia and southwestern Virginia, USA	30
Editorial Board	30
Deep-basin gas generation via organic–inorganic interactions: New insights from redox-controlled hydrothermal experiments at elevated temperature	30
Cyclical water vapor sorption-induced structural alterations of mine roof shale	30