Geochemistry and mineralogy of a modern buserite deposit from a hot spring in Hokkaido, Japan

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Authors:Usui, Akira; Mita, Naoki
Author Affiliations:Primary:
Geological Survey of Japan, Ibaraki, Japan
Volume Title:Clays and Clay Minerals
Source:Clays and Clay Minerals, 43(1), p.116-127. Publisher: Clay Minerals Society, Clarkson, NY, United States. ISSN: 0009-8604
Publication Date:1995
Note:In English. 60 refs.; illus., incl. 3 tables, sketch maps
Summary:The hot spring water discharging from a flank of an active volcano is precipitating unique monomineralic manganese deposits over volcanic terrain. The major and trace element chemistry, XRD mineralogy, DTA, and SEM observations indicate that the deposits consist of 10 Å phyllomanganate (buserite) accommodating inter-layer Ca and Mg with negligible amounts of detrital minerals. Other metallic elements can be accommodated by buserite, but concentrations are negligible ranging less than 10 ppm to 500 ppm. Abundance and pattern of REE (less than 100 ppm in total) are similar to those from hydrothermal manganese deposits. The buserite is enriched in Ca and Mg but depleted in Na in comparison with those in the spring water. The distribution coefficients for Ca, Mg and Na between the buserite and the host water were calculated assuming an ion-exchange equilibrium in the Yuno-Taki Fails, which proved applicable to other manganese deposits from surficial environments on land and oceans.
Subjects:Buserite; Cenozoic; Chemical composition; Chemically precipitated rocks; Clay mineralogy; Crystal chemistry; DTA data; Geochemistry; Ground water; Holocene; Hot springs; Ion exchange; Major elements; Manganese ores; Metal ores; Mineral composition; Modern; Oxides; Phase equilibria; Precipitation; Quaternary; Sedimentary rocks; SEM data; Siliceous sinter; Springs; Thermal waters; Todorokite; Trace elements; Volcanoes; X-ray diffraction data; Asia; Far East; Hokkaido; Japan; Akan; Mount Me-Akan; Yuno-Taki Falls
Coordinates:N433000 N433000 E1441000 E1441000
Abstract Numbers:95M/4712
Record ID:1995034870
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland
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