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Uraniferous gorceixite in the South Carolina coastal plain (U. S. A. )

Journal Article:

Abstract

Gorceixite, a rare Ba-Al phosphate containing 200-2000 ppm U, occurs as thin seams or nodules in Upper Eocene deposits of the Coastal Plain province in Aiken County, South Carolina. At every locality gorceixite appears to be a post-depositional feature. Radiochemical results for various daughter-parent pairs in the /sup 238/U decay series show that uranium enrichment occurred at least 1 Ma ago and there has been little uranium migration since. There has been extensive redistribution of /sup 226/Ra relative to /sup 230/Th and /sup 210/Po, with /sup 226/Ra suddenly migrating from the gorceixite into the overlying sediments within the last one hundred years. The clay-mineral and elemental distributions through a gorceixite outcrop suggest that gorceixite formed as a result of intensive leaching by acidic groundwater during development of a paleo-soil horizon. The sources for the components of gorceixte may have been leached from local sedimentary deposits derived from the barite, monazite and granitic occurrences in the adjacent piedmont rocks. This model provides for: the predominance of gibbsite above and kaolinite below the gorceixite; mechanisms for phosphate fixation and uranium enrichment; depletion of the more soluble elements above the gorceixite; and the thinness and limited areal extent of known occurrences.
Authors:
Michel, J; Cole, K H; Moore, W S [1] 
  1. South Carolina Univ., Columbia (USA). Dept. of Geology
Publication Date:
Apr 01, 1982
Product Type:
Journal Article
Reference Number:
AIX-13-698902; EDB-82-178979
Resource Relation:
Journal Name: Chem. Geol.; (Netherlands); Journal Volume: 35:3-4
Subject:
58 GEOSCIENCES; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; SEDIMENTS; RADIONUCLIDE MIGRATION; URANIUM MINERALS; DIAGENESIS; ABUNDANCE; ALUMINIUM PHOSPHATES; BARIUM PHOSPHATES; DAUGHTER PRODUCTS; ISOTOPE RATIO; LEACHING; MINERALS; ORE ENRICHMENT; RADIOCHEMISTRY; RADIUM 226; RADON 222; SEA BED; SOUTH CAROLINA; SPATIAL DISTRIBUTION; TIME DEPENDENCE; URANIUM 238; URANIUM ADDITIONS; ACTINIDE ALLOYS; ACTINIDE ISOTOPES; ACTINIDE NUCLEI; ALKALINE EARTH ISOTOPES; ALKALINE EARTH METAL COMPOUNDS; ALLOYS; ALPHA DECAY RADIOISOTOPES; ALUMINIUM COMPOUNDS; BARIUM COMPOUNDS; CHEMISTRY; DAYS LIVING RADIOISOTOPES; DISSOLUTION; DISTRIBUTION; ENRICHMENT; ENVIRONMENTAL TRANSPORT; EVEN-EVEN NUCLEI; FEDERAL REGION IV; HEAVY NUCLEI; ISOTOPES; MASS TRANSFER; MATERIALS; NORTH AMERICA; NUCLEI; ORE PROCESSING; OXYGEN COMPOUNDS; PHOSPHATES; PHOSPHORUS COMPOUNDS; PROCESSING; RADIOACTIVE MATERIALS; RADIOACTIVE MINERALS; RADIOISOTOPES; RADIUM ISOTOPES; RADON ISOTOPES; SEPARATION PROCESSES; URANIUM ALLOYS; URANIUM ISOTOPES; USA; YEARS LIVING RADIOISOTOPES; 580400* - Geochemistry- (-1989); 050100 - Nuclear Fuels- Reserves, Exploration, & Mining
OSTI ID:
7028421
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: CHGEA
Submitting Site:
HEDB
Size:
Pages: 227-245
Announcement Date:

Journal Article:

Citation Formats

Michel, J, Cole, K H, and Moore, W S. Uraniferous gorceixite in the South Carolina coastal plain (U. S. A. ). Netherlands: N. p., 1982. Web.
Michel, J, Cole, K H, & Moore, W S. Uraniferous gorceixite in the South Carolina coastal plain (U. S. A. ). Netherlands.
Michel, J, Cole, K H, and Moore, W S. 1982. "Uraniferous gorceixite in the South Carolina coastal plain (U. S. A. )." Netherlands.
@misc{etde_7028421,
title = {Uraniferous gorceixite in the South Carolina coastal plain (U. S. A. )}
author = {Michel, J, Cole, K H, and Moore, W S}
abstractNote = {Gorceixite, a rare Ba-Al phosphate containing 200-2000 ppm U, occurs as thin seams or nodules in Upper Eocene deposits of the Coastal Plain province in Aiken County, South Carolina. At every locality gorceixite appears to be a post-depositional feature. Radiochemical results for various daughter-parent pairs in the /sup 238/U decay series show that uranium enrichment occurred at least 1 Ma ago and there has been little uranium migration since. There has been extensive redistribution of /sup 226/Ra relative to /sup 230/Th and /sup 210/Po, with /sup 226/Ra suddenly migrating from the gorceixite into the overlying sediments within the last one hundred years. The clay-mineral and elemental distributions through a gorceixite outcrop suggest that gorceixite formed as a result of intensive leaching by acidic groundwater during development of a paleo-soil horizon. The sources for the components of gorceixte may have been leached from local sedimentary deposits derived from the barite, monazite and granitic occurrences in the adjacent piedmont rocks. This model provides for: the predominance of gibbsite above and kaolinite below the gorceixite; mechanisms for phosphate fixation and uranium enrichment; depletion of the more soluble elements above the gorceixite; and the thinness and limited areal extent of known occurrences.}
journal = {Chem. Geol.; (Netherlands)}
volume = {35:3-4}
journal type = {AC}
place = {Netherlands}
year = {1982}
month = {Apr}
}