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Distribution and Origin of Carbonate Sediments near Dok Island: Preliminary Study  

Woo, Kyug-Sik (Department of Geology, Kangwon National University)
Ji, Hyo-Seon (Department of Geology, Kangwon National University)
Kim, Lyoun (Department of Geology, Kangwon National University)
Jeon, Jin-A (Department of Geology, Kangwon National University)
Park, Jae-Suk (Department of Geology, Kangwon National University)
Park, Heung-Sik (Korea Ocean Research and Development Institute (KORDI))
Kim, Dong-Seon (Korea Ocean Research and Development Institute (KORDI))
Park, Chan-Hong (Korea Ocean Research and Development Institute (KORDI))
Publication Information
The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY / v.14, no.3, 2009 , pp. 171-180 More about this Journal
Abstract
Based on the constituent analysis of sediments near Dok Island, the origin and sedimentary facies were Investigated. The sediments are mainly from originated from volcanic and volcaniclastic rock fragments derived from Dok Island and carbonate sediments formed by a variety of shallow-dwelling organisms that secreted calcareous skeletons. Carbonate producers include mollusks (bivalves and gastropods), encrusting & branching bryozoans, encrusting & segmented red algae, worm tubes, barnacles, diatoms, sponge spicules and echinoderm fragments. The distribution and relative amount of these constituents are basically dependent upon water depth and grain size even though local variations can be observed within the same depth interval. Five sedimentary facies can be divided: nearshore facies (<20 m), neritic facies ($20{\sim}100m$), upper transitional facies ($100{\sim}200m$), lower transitional facies ($200{\sim}700m$), and hemipelagic facies (>700 m). The sediments that were sampled below the water depth of 2,000 m still contain a significant amount of carbonates (ca. $10{\sim}20%$), implying that the carbonate compensation depth in the East Sea may well exceed this water depth.
Keywords
Cool Water Carbonates; Dok Island; Sedimantary Facies; East Sea; Carbonate Compensation Depth;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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