Bulletin of the Chemical Society of Japan · 1990 · 13 citations · 2 references
Natural SciencesEarth SciencesGeologyElemental AnalysisGeochemistryInorganic ChemistryIgneous MineralsMineral ChemistryMineral GeochemistrySediment ChemistrySediment CompositionSedimentary GeochemistryFeldspar MineralsIgneous MineralogyInorganic SeleniumOxidation State DeterminationPlagioclase FeldsparReference MaterialsRock-forming MineralsSediment Geochemistry
Abstract The selenium content of 188 samples (115 igneous rocks, 46 sedimentary rocks, and 27 sediments, including 38 rock-forming minerals and 25 rock reference materials) issued from the Geological Survey of Japan were determined. In these samples selenium was distributed over a wide range of concentrations, 0.1–19500 ng g−1. Especially, selenium was rich in alkali-feldspar (7.5–149 ng g−1) as well as in plagioclase (3.6–147 ng g−1), though not in mica (2.4–14.8 ng g−1) and quartz (0.6–6.4 ng g−1). Selenium, rich in feldspar, was easily dissolved as selenite with CO2-bubbling water. In a reservoir sediment-core (from the surface to 15-cm depth), selenite and much organically-complexed selenium were dissolved with 0.1 M hydrochloric acid and the subsequent 1 M sodium hydroxide solutions, respectively.
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