Published July 1990 | Version v1
Journal article Metadata-only

Th/U disequilibria in carbonate-rich soils of subarid areas; an assessment of U-fluxes and erosional rates. Example of the Palmyra basin (Syria)

Creators

  • 1. Quebec Univ., Montreal, PQ (Canada)
  • 2. Atomic Energy Commission, Damascus (Syria)

Description

Th and U concentrations in the carbonate-rich matrix of unsaturated soils from the Palmyra area give evidence of a significant vertical transfer of uranium in the profiles concurrently with a co-dissolution/co-precipitation of calcite as shown by 14C activities. Th/U radioactive disequilibria allow calculation of U-dissolution rates of ca. 10-4 to 10-5 yr-1 and a mean erosional rate of ca. 1 to 2 cm x 103 yr

Abstract (French)

Les concentrations en U et Th, dans la matrice de la zone non saturee des sols carbonates de la region de Palmyre, rendent compte d'un transfert d'uranium, de la surface vers la profondeur des profils, accompagne d'une co-dissolution/co-precipitation de la calcite, comme l'indiquent les activites 14C mesurees. Les desequilibres Th/U observes indiquent des taux d'ablation d'uranium de l'ordre de 10-4 a 10-5 an-1, dans les horizons superficiels, et une vitesse d'erosion des sols de l'ordre de 1 a 2 cm.10-3 an

Additional details

Additional titles

Original title (French)
Desequilibres Th/U dans les sols carbonates en climat subaride; estimation des flux d'uranium et vitesse d'erosion. Le cas du bassin de Palmyre (Syrie)

Publishing Information

Journal Title
Comptes Rendus de l'Academie des Sciences. Serie 2
Journal Volume
311
Journal Issue
1
Series
C. R. Acad. Sci., Ser. 2.
Journal Page Range
233-238
ISSN
0764-4450
CODEN
CRAME

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
22008101
Subject category
S54: ENVIRONMENTAL SCIENCES;
Descriptors DEI
CARBONATE ROCKS; DISSOLUTION; GEOCHEMISTRY; PRECIPITATION; RADIONUCLIDE MIGRATION; SOILS; SYRIA; THORIUM; URANIUM
Descriptors DEC
ACTINIDES; ASIA; DEVELOPING COUNTRIES; ELEMENTS; ENVIRONMENTAL TRANSPORT; MASS TRANSFER; METALS; ROCKS; SEDIMENTARY ROCKS; SEPARATION PROCESSES