论文部分内容阅读
采用小珠标准法统计研究了南海东北部海盆边缘ＲＣ２６－１６站孔的钙质超微化石含量和组分丰度的变化特点，结合再沉积化石含量变化、分异度和溶解指数以及测年和氧同位素分析资料，确认新仙女木期发生于１１．４４～１０．４９ｋａ，其结束时间的再沉积化石丰度具有高峰值后突然下降的特点；全新世中期升温期或大暖期的出现时间为７．８０～５．２５ｋａ，具有化石丰度低而波动，分异度小，溶解指数高的特点；沉积速率由冰期向冰后期逐渐下降，就超微化石而论，其最高丰度值出现在沉积速率骤减处，而最低丰度值则可出现在沉积速率最大或最小期间。
The characteristics of calcareous microfossil content and component abundance in RC26-16 station edge of northeastern South China Sea Basin were studied by the method of bead standard method. Combined with the change of sedimentary fossil content, the diversity and dissolution index and the dating And oxygen isotope analysis data confirmed that the new fairy woody period occurred in 11.44 ~ 10.49ka, the end of the time of the redeposition of fossil abundance peaked suddenly decreased characteristics; mid-Holocene warming or the emergence of large warm-season The time is from 7.80 to 5.25 ka, which has the characteristics of low and fluctuating fossil abundance, small degree of differentiation and high dissolution index. The deposition rate gradually decreases from the ice age to the late ice period. The value appears at a sharp decrease in sedimentation rate, whereas the lowest abundance occurs at the maximum or minimum sedimentation rate.