Der Eozän/Oligozän Übergang aus zyklostratigraphischer Perspektive

从旋回地层学角度看始新世/渐新世转变

• 批准号: 179386126
• 负责人: Dr. Ursula Röhl
• 金额: --
• 依托单位: Zentrum für Marine Umweltwissenschaften (MARUM)
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/179386126?language=en
• 关键词: Der; Eoz; Oligoz; bergang; aus

We plan to establish a fully integrated and astronomically calibrated bio-, chemo-, and magnetostratigraphy at the equatorial Pacific for the Bartonian and Priabonian (41 to 34 Ma) to improve, date, and intercalibrate bio- and magnetostratigraphic datums. An accurate and precise age model is critical to unravel the cause and consequences of events across the Eocene/Oligocene climatic transition. Prerequisite is the correlation and integration of ODP Leg 199 (Sites 1218 through 1220) and IODP Expedition 320 (Sites U1331 through U1334) data (XRF core scanning, physical properties, bio- and magnetostratigraphy) for the middle to late Eocene and earliest Oligocene (magnetic polarity chrons C12n to C20n). The revised composite records will be used to validate and extend the astronomical calibration of the geological timescale into the middle Eocene. We plan to reconstruct the equatorial Pacific Carbonate Compensation Depth (CCD) in detail by using calibrated high-resolution XRF core scanning data with the aim to address how and why the acidity of the oceans changed in association with shifts in the global Eocene climate. We further will explore the characteristics of the Carbonate Accumulation Events (CAE) and evaluate the relationship of the long-period carbonate cycles in the equatorial Pacific sediments to astronomical forcing. Finally, we would like to contribute to a new high-resolution (on orbital time-scales) record of stable isotopes from bulk sediments at four IODP Exp. 320 sites (U1331 through U1334) along a depth transect from the top of magnetic polarity chron C15n through the base of C12r across the Eocene/Oligocene transition (35 to 33 Ma).

我们计划建立一个完全集成和天文校准的生物，化学和磁性地层学在赤道太平洋的Bartonian和Priabonian（41至34马），以改善，日期和相互校准生物和磁性地层基准。一个准确和精确的年龄模型对于揭示始新世/渐新世气候转变事件的原因和后果至关重要。前提是对ODP 199航次（1218至1220号站点）和IODP考察320（U1331至U1334号站点）数据（XRF岩心扫描、物理性质、生物和磁性地层学）进行对比和整合，以获得始新世中期至晚期和渐新世早期（磁极性年代C12 n至C20 n）的数据。修订后的综合记录将用于验证地质时标的天文校准，并将其延长到始新世中期。我们计划通过使用校准的高分辨率XRF岩心扫描数据详细重建赤道太平洋碳酸盐补偿深度（CCD），旨在解决海洋酸度如何以及为什么与全球始新世气候变化相关。我们将进一步探讨碳酸盐堆积事件（CAE）的特征，并评估赤道太平洋沉积物中长周期碳酸盐旋回与天文强迫的关系。最后，我们想贡献一个新的高分辨率（轨道时间尺度）记录的稳定同位素从散装沉积物在四个IODP实验。沿着一条从磁极性年代C15 n顶部到C12 r底部、跨越始新世/渐新世过渡期（35 ~ 33 Ma）的深度断面，共320个测点（U1331 ~ U1334）。

项目成果

Orbitally tuned timescale and astronomical forcing in the middle Eocene to early Oligocene

• DOI: 10.5194/cp-10-955-2014
• 发表时间: 2013-12
• 期刊: Climate of The Past
• 影响因子: 4.3
• 作者: T. Westerhold;U. Röhl;H. Pälike;R. Wilkens;P. Wilson;G. Acton

Orbital pacing of Eocene climate during the Middle Eocene Climate Optimum and the chron C19r event: Missing link found in the tropical western Atlantic

• DOI: 10.1002/ggge.20293
• 发表时间: 2013-11
• 期刊: Geochemistry
• 影响因子: 3.7
• 作者: T. Westerhold;U. Röhl

Revised composite depth scales and integration of IODP Sites U1331-U1334 and ODP Sites 1218-1220

修订了复合深度尺度以及 IODP 站点 U1331-U1334 和 ODP 站点 1218-1220 的集成

• DOI: 10.2204/iodp.proc.320321.201.2012
• 发表时间: 2012
• 作者: Westerhold;Wilkens;Pälike;Kamikuri;Ohneiser;Yamamoto;Richter;Liebrand;Expedition 320;321 Scientists
• 通讯作者: 321 Scientists