(Table T1) Quaternary, Miocene, and Oligocene calcareous nannofossil stratigraphy of ODP Hole 183-1139A sediments@en

The distribution of calcareous nannofossils at Ocean Drilling Program Site 1139 on Skiff Bank off the western edge of the Northern Kerguelen Plateau has been used to delineate Quaternary, middle Miocene-middle Oligocene, and lower Oligocene sediments in an expanded 385-m rotary-cored section. Sedimentation rates through most of the Tertiary are high (average = 23 m/m.y.) as a result of clastic input and dilution by high siliceous productivity; chert, however, was encountered in only a single sample. These characteristics, plus the presence of multiple, reasonably well preserved siliceous and calcareous microfossil groups deposited well above the calcite compensation depth, make this site a potential candidate for more detailed coring for paleoceanographic objectives in the future. […]

针对北凯尔盖朗高原西缘外侧斯基夫滩上的大洋钻探计划（Ocean Drilling Program, ODP）1139站位，研究者借助钙质超微化石（calcareous nannofossils）的分布特征，在总长385米的扩展型旋转取心剖面中厘定了第四系、中中新世-渐新世统及渐新世下部沉积物。受碎屑物质输入与高硅质生产力的共同影响，第三纪多数时段的沉积速率较高（平均为23米/百万年），但仅在单个样品中检出燧石。该站位的上述特征，加之存在多组保存状态较为完好的硅质与钙质微化石，且其沉积层埋藏位置远高于方解石补偿深度（Calcite Compensation Depth, CCD），使其成为未来开展更详细取心以实现古海洋学研究目标的潜在候选站位。[…]