九州西部における内湾堆積物のCHN組成

概要

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Eighty three bottom sediment samples were collected from the Imari Bay, Omura Bay and Ariake Sea, northwestern Kyushu. These samples and the sand, silt and clay fractions were analyzed for the organic carbon, total hydrogen and total nitrogen. The following resurts were obtained. 1) In the sandy sediments, the clay fractions contained the C, H, N more than the sand and silt fractions. Conversely, in the muddy sediments, the clay fractions contained the C, H, N less than the other fractions. 2) The contents of C, N in the sand fractions decrease with an increase in the amount of the sand. In the same way, the contents of C, N in the clay fractions decrease with an increase in the amount of the clay. It seems that the sand dilute the contents of C, H, N in the sand fractions and the clay also dilute them in the clay fractions. 3) The C/N ratio varied between 9.02 and 13.52 in the muddy sediments which contain a great amout of C, N, and between 7.52 and 10.38 in the sandy sediments. The C/N ratio of the sand, silt and clay fractions are generally higher in the muddy sediments than the sandy sediments.
長崎大学教育学部の論文