Clayey lime silt on surface of bottom floor of coral seas between the Miyako and Irabu Islands, Okinawa, Japan.
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Accession number;01A1038950
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| Title;Clayey lime silt on surface of bottom floor of coral seas between the Miyako and Irabu Islands, Okinawa, Japan. |
| Author;
YAMAMOTO S
(Univ. Ryukyus, Okinawa, Jpn)
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Journal Title;Bulletin of the College of Science, University of the Ryukyus
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Journal Code:S0995A
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ISSN:0286-9640
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VOL.;NO.72;PAGE.111-118(2001)
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| Figure&Table&Reference;FIG.5, TBL.1, REF.12 |
| Pub. Country;Japan |
| Language;English |
| Abstract;Carbonate muddy sediments in the offshore of west coast of the Miyako Island were isolated into silt and clay fractions and their bulk mineralogy was compared each other. Clay fractions of these muddy sediments contain low-Mg calcite(LMC) and very small amounts of aragonite and many kinds of clay minerals. The concentration of aragonite is higher in silt fractions than clay fractions. Therefore, these muddy sediments should be termed as clayey lime silt rather than termed as lime mud. The origin of clay minerals may be originated from hemipelagic clay in offshore continental slope or the Shimajiri mudstone exposed in land areas. In the offshore of west coast of the Miyako Island, two large areas are covered by carbonate mud or silt; clayey lime silt in the north and lime silt in the south, as being influenced by geography and topography in this area. (author abst.) |
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