海底コアの研究における一定容量サンプリングの重要性

概要

論文の詳細を見る
Sampling of a constant volume of sediment from a deep-sea piston core provides valuable information concerning water content, supply rate of materials to the sea floor and productivity of marine organisms in the overlying water column. A sediment core obtained from the continental bench at a water depth of 2, 020m off the Boso Peninsula represents an area of extremely high rates of bulk sedimentation and water free sedimentation. Supply of carbonate and non-carbonate materials was high during the transitional period from the end of the last glacial age to the early Holocene (from 13, 500 years B. P. to 9, 700 years B. P.). Materials deposited during this period consist mainly of non-carbonate particles less than 74μ in size which probably derived from aeolian dust. Also productivity of planktonic foraminiferal species Globorotalia menardii increased abruptly at about 10, 000 years B. P. These facts suggest that both the supply rate of non-carbonate materials and productivity of marine organisms were intensive during the transitional period from the last glacial age to the Holocene.
日本古生物学会の論文
1983-12-15