Organic-petrographical analysis on Cenozoic sediments from the Lomonosov Ridge (Arctic Ocean) for paleoenvironmental reconstruction

该项目旨在量化和鉴定北冰洋中部Lomonosov海脊IODP孔302号沉积物中的特殊有机质及其在新生代的变化。有机岩相学分析(显微组分分析、镜质组反射率)将用于重建控制有机质沉积环境的古环境和古气候条件。计划对晚白垩世/新生代沉积物的首次研究将使人们能够估计北冰洋中部从温暖(无冰)到寒冷(冰盖)北冰洋演变过程中的有机碳通量。此外，建立一个解释富有机沉积物(晚白垩世/古近纪)形成的模型也将是一个重点。

The project aims at the quantification and identification of the particular organic matter and its variation through Cenozoic times in sediments from IODP hole 302 from the Lomonosov Ridge, Central Arctic Ocean. Organic-petrographical analyses (maceral analysis, vitrinite reflectance) will be used for the reconstruction of the paleoenvironmental and paleoclimatic conditions, which controls the depositional setting of the organic matter. The planned studies on late Cretaceous/Cenozoic sediments for the first time will allow the organic-carbon-flux estimation in the Central Arctic Ocean during its evolution from a warm (ice-free) to a cold (ice-covered) Arctic Ocean. Furthermore, the attainment of a model explaining the formation of organic-rich sediments (late Cretaceous/ Paleogene) will be also a focus.