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A Comparative Study on Absolute and Relative Clay Mineral Composition of the Surface Sediments around the Jeju Island  

Moon, Dong-Hyeok (Overseas Mineral Resources Department, Mineral Resource Research Division, Korea Institute of Geoscience and Mineral Resources)
Cho, Hyen-Goo (Department of Earth and Environmental Sciences and Research Institute of Natural Science, Gyeongsang National University)
Yi, Hi-Il (Marine Geoenvironment Research Division, Korea Ocean Research and Development Institute)
Publication Information
Journal of the Mineralogical Society of Korea / v.23, no.1, 2010 , pp. 15-23 More about this Journal
Abstract
The absolute clay mineral compositions and regional distribution of the 131 bulk marine surface sediments around the Jeju Island was compared to their relative compositions and distribution using quantitative X-ray diffraction analysis. Average absolute clay mineral composition is illite 15.3% (0.5~40.5%), chlorite 2.6% (0~7.9%), and kaolinite 1% (0~5.6%). Total contents of the clay minerals are very high in the South Sea of Korea, northwestern part and southern offshore of Jeju Island. The average relative composition is illite 70.9% (16.7~89%), chlorite 21.5% (8.4~68.5%), and kaolinite 7.6% (0~29.3%). Relative illite contents are high in the northwestern and southeastern part of study area, and southern part of Jeju Island. Chlorite contents are high in the eastern part of study area and western part of Jeju Island. Kaolinite contents are high in the western and southern part of Jeju Island, and southern offshore of Jeju Isand. Absolute Distribution patterns are very similar to those of fine-grained (from clay to silt) sediment, whereas relative distribution patterns do not show any relationship with those of fine-grained sediment.
Keywords
Marine surface sediment; quantitative X-ray diffraction analysis; clay mineral; absolute mineral composition; relative mineral composition;
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Times Cited By KSCI : 6  (Citation Analysis)
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