Reconstructing Eocene Eastern Indian Ocean Dynamics Using Ocean-Drilling Stratigraphic Records

Ke Xu; David De Vleeschouwer; Maximilian VahlenkampRenchao YangHonghan Chen

首页> 外文期刊>Paleoceanography >Reconstructing Eocene Eastern Indian Ocean Dynamics Using Ocean-Drilling Stratigraphic Records

【24h】

Reconstructing Eocene Eastern Indian Ocean Dynamics Using Ocean-Drilling Stratigraphic Records

机译：Reconstructing Eocene Eastern Indian Ocean Dynamics Using Ocean-Drilling Stratigraphic Records

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

The Eocene Epoch corresponds to the runup toward the Greenhouse to Icehouse Cenozoic transition. To fully appreciate this climate evolution, detailed and accurate age-depth models are required. While much progress has been made recently in the field of Eocene astrochronology, the construction of unambiguous Eocene astronomical timescales (ATS) is hampered by lithologically undetected hiatuses, the scarcity of carbonate-rich marine successions, and conflicting cyclostratigraphies. In this study, we present an orbital-scale cyclostratigraphy for Ocean Drilling Program (ODP) Hole 762C, and we reconstruct Eastern Indian Ocean dynamics. This reconstruction is based on two oceandrilling Eocene sequences: ODP Hole 762C and International Ocean Discovery Program (IODP) Site U1514. Our eccentricity-based cyclostratigraphy for Hole 762C is integrated with existing bio and magnetostratigraphies and constitutes the most precise available chronology for this legacy site. The Hole 762C stratigraphy is combined with the existing Site U1514 age-depth model to obtain a high-resolution Eocene ATS for the Eastern Indian Ocean. We apply sedimentary noise modeling to obtain new insights in benthic turbulence at both sites. Despite the significant difference in paleo-waterdepth, noise levels at both sites carry a 1.2-Myr obliquity amplitude imprint. We interpret the sedimentary noise at Hole 762C, on a submarine plateau, in terms of sea-level change. The sedimentary noise at U1514, by contrary, is interpreted to be modulated by bottom current intensity as this site represents a deep-sea basinal environment. We conclude that, despite very similar astronomical signatures, the mechanistic pathways between astronomical forcing and sedimentary response were radically different at these two sites.

著录项

来源
《Paleoceanography》 |2021年第2期|e2020PA004116-1-e2020PA004116-20|共20页
作者
Ke Xu; David De Vleeschouwer; Maximilian VahlenkampRenchao YangHonghan Chen;
展开▼
作者单位

Faculty of Earth Resources, Key Laboratory of Tectonics and Petroleum Resource, Ministry of Education, China University of Geosciences, Wuhan, China;

MARUM-Center for Marine and Environmental Sciences, University of Bremen, Bremen, Germany;

Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals, Shandong University of Science and Technology, Qingdao, China;

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
Reconstructing; Eocene; Eastern;

Reconstructing Eocene Eastern Indian Ocean Dynamics Using Ocean-Drilling Stratigraphic Records

摘要

著录项

相关主题

期刊订阅