Cenozoic Deep Water History on Ceara Rise: An Integrated Geophysical and Sedimentological Survey

在过去的几年里，海洋钻探计划已经 采用了一种抽样策略，其中测深断面是 在海岭上钻探， 碳酸盐生成和溶解的历史以及深水 化学和循环。这一战略是从类似的 浅部取芯程序检查晚第四纪海洋学 历史碳酸盐堆积在最浅的地方， 深度样带近似碳酸盐生产力 上覆的沃茨。如果这些地点很近， 在深处，积累率将记录碳酸盐 溶解作用受底层水变化的控制 化学. 本项目的目标是获取地震数据 以及西赤道地区塞阿拉海隆的岩芯样本 大西洋塞阿拉海隆被厚厚的新生代地层覆盖 沉积物，应该是一个理想的网站进行深度样带研究。 此外，要获得的数据将构成 为此提出了详细的ODP钻探计划 区

During the last few years, the Ocean Drilling Program has employed a sampling strategy in which bathymetric transects are drilled on aseismic ridges in order to reconstruct the Cenozoic history of carbonate production and dissolution, and deep water chemistry and circulation. This strategy has evolved from similar shallow coring programs examining late Quaternary oceanographic history. Carbonate accumulation in the shallowest sites of the depth transect approximates carbonate productivity in the overlying waters. If the sites are close together and only vary in depth, the accumulation rates will record carbonate dissolution which will be controlled by changes in bottom water chemistry. The objective of the present project is to acquire seismic data and core samples from the Ceara Rise in the western equatorial Atlantic. The Ceara Rise is capped by a thick section of Cenozoic sediments and should be an ideal site for a depth transect study. Additionally, the data to be acquired will form the basis for a detailed ODP drilling program which has been proposed for this area.