Effect of lateral advection on sedimentary climate archives - high-resolution records from the last Deglacial to Holocene North Atlantic drift deposits

横向平流对沉积气候档案的影响——末次冰期至全新世北大西洋漂流沉积物的高分辨率记录

• 批准号: 5435503
• 负责人: Dr. Michael Frenz
• 金额: --
• 依托单位: Fachgebiet Sedimentologie
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2004
• 资助国家: 德国
• 起止时间: 2003-12-31 至 2004-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5435503?language=en
• 关键词: Effect; lateral; advection; sedimentary; climate

This project will elaborate an integrated, multi-parameter millennial-scale record of Deglacial-Holocene drift sediments in the North Atlantic at ODP Sites 980 (Feni Drift) and 984 (Björn Drift) using sedimentological data and supplementary information from clay mineralogy, micropaleontology, and organic geochemistry. Sediment grain-sizes as the central issue will provide detailed information on the current strength variability over the past 20,000 years, after ice-rafted bias is filtered from the record. The clay mineral assemblage will identify potential source areas for fine-grained material. The composition of the coccolith assemblage gives indications for changes of surface hydrology and productivity and supply of re-distributed pre-Quaternary species. Organic carbon and isotopic studies will reveal possible offset between composition and radiocarbon ages of carbonate and organic matter in the fine fraction relative to properties of the bulk sediment. The integration of the sub-disciplines will demonstrate the variable impact of lateral sediment displacement by current action on the interpretation of palaeoclimatic records.

该项目将利用沉积学数据和来自粘土矿物学、微体古生物学和有机地球化学的补充信息，详细记录ODP 980号站点（Feni漂移）和984号站点（Björn漂移）北大西洋冰消期-全新世漂移沉积物的千年尺度综合多参数记录。沉积物的粒度作为中心问题，将提供详细的信息，目前的强度变化在过去的20,000年中，冰筏的偏见是从记录过滤。粘土矿物组合将确定细粒物质的潜在源区。颗石组合的组成给出了地表水文和生产力的变化和供应的重新分布的前第四纪物种的迹象。有机碳和同位素研究将揭示相对于大部分沉积物的性质，细颗粒中碳酸盐和有机物的成分和放射性碳年龄之间可能存在的偏移。子学科的整合将展示当前作用对古气候记录解释的横向沉积物位移的可变影响。