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对位于冲绳海槽中段近槽底岩芯DGKS96 0 3有孔虫分析、AMS14 C年龄测试和FP 1 2E转换函数计算 ,获得冬季和夏季海水表面古温度随深度的变化曲线 .整个岩芯可见 7个冷期和 8个暖期 .全新世中晚期的低温事件、YD、H1、H2、H3和H4事件 ,以及末次冰期中的小冷期均有明显反映 ,说明 5 0kaBP以来的短周期变冷事件很可能具有全球性意义 .冷期时的沉积速率普遍大于暖期 ,全新世为最低 ,可能与海面上升 ,黑潮主轴西移有关 .冲绳海槽是第四纪火山活动高发区 ,可见多次火山活动留下的火山玻璃和浮岩 .
The curve of the ancient palaeontology temperature along the depth of winter and summer was obtained with the analysis of foraminifera DGKS96 0 3, AMS14 C age test and FP 1 2E transfer function in the core near the bottom of the Okinawa Trough. One cold period and eight warm periods.The low-temperature events, YD, H1, H2, H3 and H4 events in the mid and late Holocene and the small cold periods in the last ice age both reflect the short-period cooling since 580 kaBP The events are likely to have a global significance.The deposition rate during cold period is generally greater than that of warm period, the lowest for the Holocene, possibly related to the rising of the sea surface and the westward movement of the Kuroshio main axis.The Okinawa Trough is the highest Quaternary volcanic activity area, Volcanic activity left volcanic glass and pumice.