Calcareous nannofossil stratigraphy, mass accumulation rates and bulk density of sediments from ODP Leg 173 sites@en

Drilling on the Iberia Abyssal Plain during Ocean Drilling Program Leg 173 allowed us to recover Upper Cretaceous through Paleocene sediments at Sites 1068 and 1069 and only upper Paleocene sediments at Site 1067, which expands considerably the Upper Cretaceous to Paleocene record for this region. Of these three sites, Site 1068 recovered uppermost Cretaceous sediments as well as the most complete Paleocene record, whereas Site 1067 yielded only uppermost Paleocene sediments (Zone CP8). Site 1069 provided a rather complete upper Campanian through Maastrichtian section but a discontinuous Paleocene record. […]本研究借助大洋钻探计划（Ocean Drilling Program）第173航次在伊比利亚深海平原实施的钻探工作，成功于站位1068和1069获取了晚白垩世至古新世的沉积物岩心，而站位1067仅采集到古新世上层沉积物，这极大丰富了该区域晚白垩世至古新世的地质记录。在上述三个站位中，站位1068不仅获取了晚白垩世最顶部沉积物，同时拥有最为完整的古新世记录；站位1067仅产出古新世最顶部沉积物（CP8带）；站位1069则获得了从坎潘期上层至马斯特里赫特期的相对完整剖面，但古新世记录并不连续。[…]