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Association of Trace Elements with Iron Oxides During Rock Weathering
Author(s) -
Koons R. D.,
Helmke P. A.,
Jackson M. L.
Publication year - 1980
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1980.03615995004400010032x
Subject(s) - saprolite , weathering , goethite , neutron activation analysis , geology , mineralogy , neutron activation , geochemistry , rare earth , chemistry , radiochemistry , neutron , physics , organic chemistry , adsorption , quantum mechanics
The association of trace elements with Fe oxides during the early stages of rock weathering was determined by analysis of fresh diabase and granite rocks, their associated whole and size‐separated saprolites, and goethite by neutron activation and X‐ray fluorescence. The same elements are found to be associated with Fe oxides when the results are interpreted by analysis of correlation, by the distribution of elements in the various size fractions, by the effects of removing free Fe oxides, and by direct analysis of geothite from the saprolite. The elements Co, Cr, Mn, Sc, Th, U, Zn, and the heavy rare‐earth elements during the weathering of diabase, and As, Co, Cr, Sc, Th, U, Zn, and the heavy rare‐earth elements during the weathering of granite are associated with Fe oxides. The concentrations of Mn are too low in this system to separate the effects of Mn oxides from those of Fe oxides.