The past and present trace metal budget of the Black Sea - A comparison of the Holocene and Eemian marine ingression

该项目的目标是重建黑海尚未研究的Eemian腐泥的气候和古环境历史，该腐泥是在DSDP第42 B航段379 A和Meteor巡航M72/5期间发现的。我们的目标是通过多学科方法，使用高分辨率地球化学指标将Eemian与现代（全新世）腐泥进行比较，以提高对黑海古环境发展的认识。本研究的主要目的是：（a）建立迄今为止尚未研究的Eemian腐泥的高分辨率化学地层学分类;（B）重建化跃层/密度跃层的发育;（c）研究从湖沼阶段到海洋阶段的过渡（反之亦然）在黑海，d）古生产力的重建和d）微量金属通量的同位素质量平衡从水柱沉积物通过时间。为了实现这些目标，我们将确定无机地球化学参数（主要和次要元素），稳定的金属同位素（铁，钼和U），和有机生物标志物（isorenieratene）在高分辨率的关键部分。我们的研究结果也将被用来比较黑海腐泥与Eemian“S5”腐泥从地中海，试图找出这两种设置的相似性和差异。

The goal of this project is to reconstruct the climatic and paleoenvironmental history of the yet unstudied Eemian sapropel in the Black Sea, which was recovered during DSDP Leg 42B Site 379A and Meteor cruise M72/5. We aim to improve the knowledge about the paleoenvironmental development of the Black Sea by comparing the Eemian with the recent (Holocene) sapropel using geochemical proxies at high resolution in a multidisciplinary approach. The main objectives we want to achieve with this proposal are a) the creation of a highresolution chemostratigraphic classification of the so far unstudied Eemian sapropel, b) reconstruction of the development of the chemo-/pycnocline, c) investigation of the transition from the limnic to the marine stage (and vice versa) in the Black Sea, d) reconstruction of paleoproductivity and d) an isotopic mass balance of trace metal fluxes from the water column to the sediment through time. To achieve these goals we will determine inorganic geochemical parameters (major and minor elements), stable metal isotopes (Fe, Mo, and U), and organic biomarkers (isorenieratene) at high resolution in key sections. The results of our study will also be used to compare the Black Sea sapropels with the Eemian “S5” sapropel from the Mediterranean Sea in an attempt to work out similarities and differences of the two settings.