Geoenvironmental model for roll-type uranium deposits in the Texas Gulf Coast
June 20, 2022
Geoenvironmental models were formulated by the U.S. Geological Survey in the 1990s to describe potential environmental effects of extracting different types of ore deposits in different geologic and climatic regions. This paper presents a geoenvironmental model for roll-front (roll-type) uranium deposits in the Texas Coastal Plain. The model reviews descriptive and quantitative information derived from environmental studies and existing databases to depict existing conditions and potential environmental concerns associated with mining this deposit type. This geoenvironmental model describes how features of the deposits including host rock; ore and gangue mineralogy; geologic, hydrologic, and climatic settings; and mining methods (legacy open-pit and in situ recovery [ISR]) influence potential environmental effects from mining. Element concentrations in soil and water are compared to regulatory thresholds to depict ambient surface water and groundwater conditions. Although most open-pit operations in this region have been reclaimed, concerns remain about groundwater quality at three of the four former mills that supported former open-pit mines and are undergoing closure activities. The primary environmental concerns with ISR mining are (1) radon gas at active ISR operations, (2) radiation or contaminant leakage during production and transport of ISR resin or yellowcake, (3) uranium excursions into groundwater surrounding active ISR operations, and (4) contamination of groundwater after ISR mining. Although existing regulations attempt to address these concerns, some problems remain. Researchers suggest that reactive transport modeling and a better understanding of geology, stratigraphy, and geochemistry of ISR production areas could minimize excursions into surrounding aquifers and improve results of groundwater restoration.
Citation Information
Publication Year | 2022 |
---|---|
Title | Geoenvironmental model for roll-type uranium deposits in the Texas Gulf Coast |
DOI | 10.3390/min12060780 |
Authors | Katherine Walton-Day, Johanna Blake, Robert R. Seal, Tanya J. Gallegos, Jean Dupree, Kent D Becher |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Minerals |
Index ID | 70239285 |
Record Source | USGS Publications Warehouse |
USGS Organization | Colorado Water Science Center; Eastern Energy Resources Science Center; Eastern Mineral and Environmental Resources Science Center; New Mexico Water Science Center |
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Johanna M. Blake, Ph.D.
Research Hydrologist (Geochemist)
Research Hydrologist (Geochemist)
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Robert R. Seal
Research Geologist
Research Geologist
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Tanya J Gallegos, Ph.D.
Associate Program Coordinator / Research Engineer
Associate Program Coordinator / Research Engineer
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Johanna M. Blake, Ph.D.
Research Hydrologist (Geochemist)
Research Hydrologist (Geochemist)
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Robert R. Seal
Research Geologist
Research Geologist
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Tanya J Gallegos, Ph.D.
Associate Program Coordinator / Research Engineer
Associate Program Coordinator / Research Engineer
Email
Phone