Abstract The petrographic composition of Cretaceous-age coals hosted in the Benue Trough, Nigeria is presented and discussed terms paleodepositional settings that influenced coal-bearing formations. Trough a failed arm triple junction an inland sedimentary basin extends NE-SW direction from Gulf Guinea south, to Chad Basin north. A total twenty-nine (29) coal samples were obtained nineteen loca...

Fluorescence microscopy has been a use fu l a n a l y t i c a l t o o l f o r cha rac t e r i z ing o r g a n i c m a t e r i a l i n v a r i o u s c o a l s and r o c k s (1-9). T e i c h m u l l e r and Wolf (3 ,7 ) discovered new f l u o r e s c i n g c o a l macerals , which a l s o were found by Spackman (6 ) i n U.S. coa l s . Ottenjahn e t a l . (9) r e l a t e d t h e f luo rescence p r...

INTRODUCTION I t is well known that elements exist in coal in a variety of different modes of occurrence [1,2]. Such modes can vary from the element being totally dispersed in the macerals (e.g. organic sulfur, carboxyl-bound Ca in lignite) to discrete mineral occurrences (e.g. pyrite, FeS,, quartz, SiO,, etc.). Recently, we showed that X-ray absorption fine structure (XAFS) spectroscopy is cap...

Environmentally and technologically sulphur is a deleterious constitute in coal which makes it unsuitable for use in metallurgical industries unless the sulphur level can be reduced to the tolerable limit. Characterization of the various forms of sulphur and their associations in coal is an essential issue to find and propose a suitable desulphurization method. In this research, to evaluate sul...

Organic matter (OM), composed of various macerals, has a strong influence on the enrichment shale gas. Nevertheless, connection between OM-hosted pore structure and maceral type is not yet fully understood because difficulty to identify types by traditional scanning electron microscope (SEM). Using combination reflected light microscopy, focused ion beam SEM (FIB-SEM), Raman spectrum, three typ...

Previous studies demonstrated that melting, initiated by supercritical fluids in the 375–400 °C range, occurred as part of anthracite metamorphism Appalachian Basin. Based on known behavior vitrinite at high temperatures and, to a lesser extent, pressures, it was determined duration heating, and resolidification event about 1 h. In current study, featureless within banded maceral assemblages de...