Chemical, isotopic, and mineralogical proxy data for aeolian input into the Lake Baikal system during the last 150 ka

过去 150ka 期间输入贝加尔湖系统的风的化学、同位素和矿物学代理数据

• 批准号: 5363927
• 负责人: Privatdozentin Dr. Hedi Oberhänsli
• 金额: --
• 依托单位: Museum für Naturkunde - Leibniz-Institut für Evolutions- und Biodiversitätsforschung (MfN)
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2002
• 资助国家: 德国
• 起止时间: 2001-12-31 至 2004-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5363927?language=en
• 关键词: Chemical; isotopic; mineralogical; proxy; data

The proposed study sheds light on the source areas of detrital components in Lake Baikal and provides new data for an evaluation of the detrital input mechanisms in response to changing North Atlantic Oscillations and monsoonal activities. We will focus on sudden cold events (Heinrich-events/stadials) and warm events (interstadials) during the last 150 ka. We interpret the following sediment data for reconstructing the aeolian input into the lake Baikal basin: (i) the Sm-Nd isotopes, (ii) the grain-size distribution of the size fraction greater than 2µm, and (iii) the distribution of trace elements in feldspar, pyroxene, apatite, garnet, and zircon. The results will contribute to a better understanding of the local and regional atmospheric circulation and provide new constraints for reconstructing the atmospheric records in Central Asia for critical time-intervals characterised by different climatic modes. The Baikal data, tracing changing atmospheric patterns and flow regimes, shall be compared with climatic records from Central Europe. This project is an innovative contribution to the ongoing EU project "CONTINENT".

拟议的研究揭示了贝加尔湖碎屑成分的源区，并提供了新的数据，以响应不断变化的北大西洋振荡和季风活动的碎屑输入机制的评估。我们将重点关注在过去150 ka的突然冷事件（海因里希事件/stadials）和温暖的事件（interstadials）。我们解释了以下沉积物数据，用于重建贝加尔湖盆地的风成输入：（i）Sm-Nd同位素，（ii）粒度大于2µm的粒度分布，以及（iii）长石，辉石，磷灰石，石榴石和锆石中微量元素的分布。研究结果将有助于更好地了解当地和区域的大气环流，并为重建中亚地区不同气候模式的关键时间间隔的大气记录提供新的限制。贝加尔湖的数据追踪不断变化的大气模式和流动状况，应与中欧的气候记录进行比较。该项目是对欧盟正在进行的“大陆”项目的创新贡献。