Deep syntectonic burial of the Anthracite belt, Eastern Pennsylvania

International Journal of Coal Geology
By:  and 

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Abstract

Fluid inclusion microthermometry and Raman spectroscopy of fluid inclusions in quartz veins from the Pennsylvanian rocks of the Anthracite belt, eastern Pennsylvania support a deep burial model of coalification in favor of focused orogenic hot fluid flow. High-temperature (250 to 255 °C) trapping of CH4 ± CO2 saturated aqueous fluids and CH4 ± CO2 inclusions indicate fluid trapping at depths of 11.5 to 13.4 km under a cover of Pennsylvanian to Permian(?) syntectonic load. In the folded rocks to the south of the Anthracite belt, CH4 ± CO2 fluid inclusions indicate a sediment load that was up to 16.3 km thick. Re-equilibrated aqueous fluid inclusions from veins in Silurian through Devonian rocks give the same range of trapping conditions but a wide range of fluid salinities suggesting that folding, fracturing, and meteoric recharge resulted in the intermixing of fluids from throughout the stratigraphic succession.

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Publication type Article
Publication Subtype Journal Article
Title Deep syntectonic burial of the Anthracite belt, Eastern Pennsylvania
Series title International Journal of Coal Geology
DOI 10.1016/j.coal.2024.104646
Volume 295
Year Published 2024
Language English
Publisher Elsevier
Contributing office(s) Geology, Energy & Minerals Science Center
Description 104646, 27 p.
Country United States
State Pennsylvania
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