Middle to Late Eocene Changes of the Ocean Carbonate Cycle

C. Borrelli; M. E. Katz; J. R. Toggweiler

首页> 外文期刊>Paleoceanography >Middle to Late Eocene Changes of the Ocean Carbonate Cycle

【24h】

Middle to Late Eocene Changes of the Ocean Carbonate Cycle

机译：Middle to Late Eocene Changes of the Ocean Carbonate Cycle

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

Sedimentary records show that calcium carbonate (CaCO_3) preservation fluctuated during the Eocene. These fluctuations are well documented for the equatorial Pacific. However, data from other basins are sparse. In this study, we report new middle and late Eocene bulk calcium carbonate percentages and accumulation rates from the northwestern Pacific (Ocean Drilling Program-ODP-Site 884) and the Atlantic (ODP Sites 1053, 1090, and 1263) Oceans; in addition, we calculate CaCO_3 accumulation rates for sites with published percentage bulk CaCO_3 to expand geographic and paleobathymetric coverage. Using these data, we investigate the response of the carbonate cycle to environmental changes (e.g., temperatures, primary productivity, weathering, and ocean circulation) at the beginning of the greenhouse-icehouse transition (~43- 34 Ma). Our results show that in the middle to late Eocene CaCO_3 accumulation rates were highly variable at different paleodepths and ocean basins suggesting that the evolution of carbonate accumulation rates over the Eocene was influenced by different processes in different locations. In particular, our data emphasize the role of surface CaCO_3 production and ocean ventilation in driving changes in CaCO_3 preservation and burial at the seafloor. Our study also highlights the need for a better understanding of the processes regulating CaCO_3 surface production today in order to correctly interpret geological records.

著录项

来源
《Paleoceanography》 |2021年第12期|e2020PA004168-1-e2020PA004168-23|共23页
作者
C. Borrelli; M. E. Katz; J. R. Toggweiler;
展开▼
作者单位

Department of Earth and Environmental Sciences, University of Rochester, Rochester, NY, USA;

Department of Earth and Environmental Sciences, Rensselaer Polytechnic Institute, Troy, NY, USA;

Geophysical Fluid Dynamics Laboratory, NOAA, Princeton, NJ, USA;

展开▼
收录信息
原文格式 PDF
正文语种英语
中图分类海洋学;
关键词
Middle; Late Eocene Changes; the Ocean Carbonate Cycle;

Middle to Late Eocene Changes of the Ocean Carbonate Cycle

摘要

著录项

相关主题

期刊订阅