大阪層群粘土層中のリチウム,カリウム含有量と堆積環境

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Analyses are presented for lithium and potassium in marine, brackish-water and fresh-water clays of the Osaka group, whose salinity environment of deposition is indicated from the paleoecological interpretation of shell fossils from the clays. Lithium is more abundant in marine and brackishwater clays than in fresh-water ones. There are no appreciable differences in lithium abundance between the former two. It appears possible to differentiate marine and brackish-water clays from fresh-water clays by lithium content. Potassium content seems to be independent of the salinity at the time of deposition. However, the ratio of it in the clay-size fraction to that in the total sediment is proportioned to lithium content.
地学団体研究会の論文
1973-07-20