Major and minor element signatures of OC-rich Paleogene sediments from Lomonosov-Ridge (IODP Leg 302)

罗蒙诺索夫海岭富含 OC 的古近纪沉积物的主量和微量元素特征（IODP Leg 302）

• 批准号: 12877501
• 负责人: Professor Dr. Hans-Jürgen Brumsack
• 金额: --
• 依托单位: Institut für Chemie und Biologie des Meeres (ICBM)
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/12877501?language=en
• 关键词: Major; minor; element; signatures; OC

The focus of the proposed project lies on medium- and high-resolution geochemical records of major and minor elements in specific Paleogene OC-rich sediments recovered during IODP Leg 302 on Lomonosov-Ridge, particularly the zebra-layer and the PETM. The Arctic Ocean represents an important archive of changing oceanic circulation and therefore global climate and to date has not been accessible for geochemical proxy-investigations. Now material from Lomonosov-Ridge has been made available through the successful ACEX drilling campaign. The aim of this proposal is to provide a general geochemical characterization of the Paleogene sedimentary record, and collaborative investigation of distinct intervals, i.e. the zebra-layer , by means of major elements and to test several paleoenvironmental hypotheses using diagnostic trace metals (TM), such as Ag, Cd, Re, Mo, V, and Zn. Modern analogues of organic carbonrich sedimentation typically are enriched in TM. The enrichment patterns provide useful information deciphering the paleoenvironment of deposition and paleoceanographic setting. Furthermore major elements contain important information on the provenance of terrigenous detrital material and the weathering regime in the hinterland. The following questions will be addressed by this proposal: To what degree are specific TM found enriched in Paleogene OC-rich sediments and how do they vary with time in relation to correlative micropaleontological and organic geochemical proxies? What are the paleoenvironmental and paleoceanographic consequences that may be deduced from major and minor element patterns, particularly with respect to the zebra-layer , Azolla freshening and the P/E boundary events? What are the most likely sources for TM enrichments and are there any indications for a freshwater contribution? How do trace metal enrichments in Paleogene OC-rich sediments compare with those from Cretaceous settings and modern analogues of OC-rich sedimentation? What is the significance of TM enrichments in Arctic Paleogene OC-rich sediments in relation to global TM cycles and basin-wide TM budgets?

拟议项目的重点在于中，高分辨率的地球化学记录的主要和次要元素在特定的古近纪OC丰富的沉积物中恢复在IODP腿302罗蒙诺索夫岭，特别是斑马层和PETM。北冰洋代表了海洋环流变化的重要档案，因此是全球气候的重要档案，迄今为止还无法进行地球化学代理调查。现在，通过成功的ACEX钻探活动，已经可以获得来自罗蒙诺索夫岭的材料。该建议的目的是提供古近纪沉积记录的一般地球化学表征，并通过主要元素对不同的间隔（即斑马层）进行合作调查，并使用诊断性微量金属（TM）（如Ag、Cd、Re、Mo、V和Zn）测试几种古环境假设。富有机碳沉积的现代类似物通常富含TM。富集模式提供了有用的信息破译沉积的古环境和古海洋环境。此外，常量元素包含了重要的信息，陆源碎屑物质的来源和风化制度在内地。以下问题将解决这个建议：在何种程度上是特定的TM发现富含古近系OC沉积物，以及它们如何随时间变化的关系，相关的微体古生物和有机地球化学代理？什么是古环境和古海洋学的后果，可以推断出从主要和次要的元素模式，特别是相对于斑马层，红萍刷新和P/E边界事件？什么是最有可能的TM富集源，是否有任何淡水贡献的迹象？如何在古近系富含有机碳沉积物中的微量金属富集与那些从白垩纪背景和现代类似的富含有机碳沉积物相比？北极古近纪富含有机碳沉积物中的TM富集与全球TM循环和全流域TM收支的关系有何意义？

项目成果

Surface water productivity and paleoceanographic implications in the Cenozoic Arctic Ocean

新生代北冰洋地表水生产力及其古海洋学意义

• DOI: 10.1029/2007pa001455
• 发表时间: 2008
• 期刊: Paleoceanography
• 作者: Knies J;Mann U;Popp B;Stein R;Brumsack H-J
• 通讯作者: Brumsack H-J

Paleoenvironmental implications of Cenozoic sediments from the central Arctic Ocean (IODP Expedition 302) using inorganic geochemistry

利用无机地球化学研究北冰洋中部新生代沉积物（IODP Expedition 302）的古环境影响

• DOI: 10.1029/2009pa001860
• 发表时间: 2010
• 期刊: Paleoceanography
• 作者: März C;Schnetger B;Brumsack H-J
• 通讯作者: Brumsack H-J

A Siliceous Microfossil View of Middle Eocene Arctic Paleoenvironments

中始新世北极古环境的硅质微化石观

• DOI: 10.1029/2007pa001485
• 发表时间: 2008
• 作者: Stickley CE;Koç N;Brumsack H-J;Jordan RW;Suto I
• 通讯作者: Suto I

Mid‐Cenozoic tectonic and paleoenvironmental setting of the central Arctic Ocean

北冰洋中部新生代构造与古环境背景

• DOI: 10.1029/2007pa001559
• 发表时间: 2008
• 期刊: Paleoceanography
• 作者: O’Regan M;Moran K;Backman J;Jakobsson M;Sangiorgi F;Brinkhuis H;Pockalny R;Skelton A;Stickley C;Brumsack H-J;Willard D
• 通讯作者: Willard D

A 26 million year gap in the central Arctic record at the greenhouse-icehouse transition: looking for clues

温室-冰库转变期间北极中部记录的2600万年差距：寻找线索

• DOI: 10.1029/2007pa001477
• 发表时间: 2008
• 期刊: Paleoceanography
• 作者: Sangiorgi F;Brumsack H-J;Willard DA;Brinkhuis H;Schouten S;Stickley CE;O'Regan M;Reichart G-J;Sinninghe Damste J
• 通讯作者: Sinninghe Damste J