Sediment Geochemical Proxys and Processes in Paleomarine Ecosystems
A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Geological Oceanography".
Deadline for manuscript submissions: 10 June 2025 | Viewed by 1402
Special Issue Editor
Interests: karst soils; environmental geochemistry; paleolimnology; marine sediments; karst paleolandscapes
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
Marine sediments are one of the primary repositories of paleoenvironmental signals. Among the various indicators, geochemical and micropaleontological sedimentary proxies are frequently utilized for paleoceanographic and paleoclimatic reconstructions. Geochemical variations in marine sediments are often employed as indicators to elucidate past changes in productivity, redox conditions, weathering patterns, and sediment provenance as a function of historical climate and oceanographic fluctuations. This Special Issue will provide an overview of frequently used geochemical proxies and their applicability for understanding the climatic processes that change the geochemical variability in palaeomarine ecosystems supported by geochronological techniques. Geochemical proxies within the geological record may reveal details regarding paleotemperature, phytoplankton community structure, vegetation history, dust provenance, nutrient cycles and availability, ocean circulation, and paleoredox conditions. The most widely used paleomarine proxies are the concentrations and ratios of certain elements in sediments, including microfossil assemblages and their δ18O and δ13C. For productivity, the nutrient concentration and past circulation were reconstructed from δ15N and δ13C. Paleomarine proxies for sea surface temperature (SST) derived from marine sediments depend on the organic or inorganic remains of marine organisms, using various biomarkers important tools for paleoreconstructions. Studies using geologic and geochemical proxy data from ground truthing studies must evaluate palaeomarine ecosystems. Studies topics include but not restricted to dealing with elemental and isotopic variations, as well as organic matter and biomarkers in marine sediments, which have been used to evaluate climate change and paleoprovenance, paleosealevel, and paleoweathering in marine basin catchments.
Dr. Slobodan Miko
Guest Editor
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Keywords
- marine sediments
- inorganic proxies
- organic proxies
- biomarkers
- paleoproductivity
- provenance
- isotopes
- redox
- sea surface temperature (SST)
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