第四紀海成堆積物に含まれるアミノ酸の層序学的研究

概要

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The stratigraphical study of amino acids in the quaternary marine sediments provides information about the paleoenviroment and the history of the continental shelf. There are large differences in the concentration and composition of amino acids in the muddy core sediments from the Danjo Basin and the continental shelf of China Continent, mainly due to the differences in the quantity of organic matter supply, composition of source materials, sedimentary environments and diagenetic changes in both areas. The amino-acid composition of carbonate sediments are characterized by a low content of basic amino acids, remarkably high concentration of acidic amino acids and trace amounts of nonprotein amino acids. The differences of amino acid composition between muddy and carbonate sediments are mainly caused by the differences of amino-acids composition of source materials (carbonate sediments-calcified protein, muddy sediments-plankton and soil organic matter). High values of the D-alloisoleucine to L-isoleucine ratio in the surface sediments reveal that relict sediments are extensively distributed in the continental shelf of the East China Sea and that the sea level has changed in the Pleistocene-Holocene age.
日本地球化学会の論文
1980-03-30