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根据测定冲绳海槽０８０、０８２两岩芯中放射性同位素和化学元素的垂直 分布，基于２３０Ｔｈ／２３２Ｔｈ放射性活度比值，确定了末次冰期和全新世之间确切的 地层年代。测得资料表明，在全新世和晚更新世期间沉积物中元素的丰度有很 大的变化，反映了冲绳海槽在不同历史时期沉积环境的变迁和物质来源的差 异。
Based on the vertical distribution of radioisotopes and chemical elements in the core 080,082 of the Okinawa Trough, the exact age of the formation between the last glacial period and the Holocene was determined based on the 230Th / 232Th radioactivity ratio. The measured data show that there is a great change in the abundance of elements in the sediments during the Holocene and Late Pleistocene, reflecting the changes in the sedimentary environment and the material sources of the Okinawa Trough in different historical periods.