Abstract
Previous studies demonstrated that melting, initiated by supercritical fluids in the 375–400 °C range, occurred as part of anthracite metamorphism in the Appalachian Basin. Based on the known behavior of vitrinite at high temperatures and, to a lesser extent, at high pressures, it was determined that the duration of the heating, melting, and resolidification event was about 1 h. In the current study, featureless vitrinite within banded maceral assemblages demonstrates the intimate association of melted and resolidified vitrinite with anthracite-rank macerals. By analogy with metamorphosed inorganic rocks, such associations represent diadysites and embrechites, i.e., cross-cutting and layered migmatites, respectively. Even though the temperature of formation of the anthracite structures is several hundred °C lower than that seen in metamorphosed inorganic rocks, anthracites are metamorphic rocks and the nomenclature for metamorphic rocks may be appropriate for coal.
Document Type
Article
Publication Date
5-2021
Digital Object Identifier (DOI)
https://doi.org/10.1016/j.gsf.2020.12.004
Repository Citation
Hower, James C.; Rimmer, Susan M.; Mastalerz, Maria; and Wagner, Nicola J., "Migmatite-Like Textures in Anthracite: Further Evidence for Low-Grade Metamorphic Melting and Resolidification in High-Rank Coals" (2021). Center for Applied Energy Research Faculty and Staff Publications. 37.
https://uknowledge.uky.edu/caer_facpub/37
Graphical abstract
Notes/Citation Information
Published in Geoscience Frontiers, v. 12, issue 3, 101122.
© 2020 Elsevier B.V.
This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/).