Computer Science
Scientific paper
Apr 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996gecoa..60.1323s&link_type=abstract
Geochimica et Cosmochimica Acta, Volume 60, Issue 8, p. 1323-1328.
Computer Science
1
Scientific paper
The possibility that the chemically similar elements Ga and Al might be fractionated during the weathering process was examined. Gallium and Al were determined in waters, source rocks, and soils in a variety of weakly basic small stream drainages in California. As expected from the low mobility of these two elements (and in agreement with previous work), little difference was found between Ga/Al ratios in source rocks and weathered residuals. However, dissolved Ga/Al ratios were consistently higher than the Ga/Al ratios of solids from the same stream basin. Evidence suggests that neither anthropogenic effects nor presence of trace sulfide minerals are likely explanations for the dissolved Ga/Al enrichment. Comparisons of Ga/Al ratios with major elements indicate that the nature and intensity of chemical weathering plays an important role in determining the dissolved Ga/Al ratio. Organic complexation of Al can also affect the dissolved Ga/Al ratio, even in weakly basic streams.
Frilot Daphne M.
Shiller Alan M.
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