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A story about some metals enrichment in Arctic Ocean sediments

Research Scholar

Liming Ye, associate researcher, Second Institute of Oceanography (China)
Leonid Polyak, faculty mentor

Background

  • Hometown: Lishui, China
  • Degrees received: PhD in marine geology, Tongji University, China.

What is the issue or problem addresses in your research?

Both manganese (Mn) and cerium (Ce) are sensitive to similar redox conditions in the marine environment and are therefore useful proxies for reconstructing paleoenvironmental conditions from marine sediments. But Mn sources, sedimentary sinks and the relationship to paleo-climatic conditions are still insufficiently understood. Even less is known about the distribution and dynamics of Ce.

What methodology did you use in your research?

A multiproxy record of sediment core ARC3-B85D from the Alpha Ridge covering estimated 350 ka is used to investigate a coupled distribution of Mn and Ce in Arctic Ocean sediments. By analyzing Mn and Ce contents, Ce/Ce* anomaly in the core and in a range of surface sediments from the western Arctic Ocean, we investigate the conditions and dynamics of concurrent metal enrichment.

What are the purpose/rationale and implications of your research?

We offer an explanation for metal distribution that is based not only on the sources but also on differential transportation modes, leading to new insights into the spatial and temporal dynamics of Mn and Ce enrichment in Arctic Ocean sediments.