【摘 要】
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从始新世温室到早渐新世冰室的特征与潜在的变化机制已经得到了广泛的关注(Prothe-ro等,2003),但关于渐新世沉积物的详细气候与海洋学研究则相对较少。众所周知,渐新世开始的
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从始新世温室到早渐新世冰室的特征与潜在的变化机制已经得到了广泛的关注(Prothe-ro等,2003),但关于渐新世沉积物的详细气候与海洋学研究则相对较少。众所周知,渐新世开始的全球逐渐变冷导致了一个明显的南极低温层的发育(Zachos等,2001;DeConto和Pol-lard,2003)。渐新世和中
The characteristics and potential mechanisms of change from the Eocene Greenhouse to the Early Oligocene icehouse have received widespread attention (Prothe-ro et al., 2003), but the detailed climate and oceanographic studies of Oligocene sediments are relative less. It is well-known that a gradual global cooling started in the Oligoceses resulted in a distinct development of the Antarctic cold layer (Zachos et al., 2001; DeConto and Pol-lard, 2003). Oligocene and Middle
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