Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 1 of 1
Full-Text Articles in Geology
Migmatite-Like Textures In Anthracite: Further Evidence For Low-Grade Metamorphic Melting And Resolidification In High-Rank Coals, James C. Hower, Susan M. Rimmer, Maria Mastalerz, Nicola J. Wagner
Migmatite-Like Textures In Anthracite: Further Evidence For Low-Grade Metamorphic Melting And Resolidification In High-Rank Coals, James C. Hower, Susan M. Rimmer, Maria Mastalerz, Nicola J. Wagner
Center for Applied Energy Research Faculty and Staff Publications
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 …