We just held two virtual sessions at Goldschmidt2020 on June 22-23.
You are able to log in using your Goldschmidt account and view the wonderful presentations and Q&A sessions online at https://goldschmidt.info/2020/program/programViewThemes
14j: New Developments in Deep-Time Paleoceanography: Geochemical Proxies, Cyclostratigraphy & Data Analysis
Conveners: Thomas Algeo, He Zhao, Mingsong Li, Feng Cheng, Benjamin Gill, Jeremy Owens, Patrick Rafter, Kathleen Johnson
Keynote: Timothy Herbert (Brown University)
The field of deep-time paleoceanography is advancing rapidly as a result of new developments in geochemical proxies, larger datasets, and advances in data analysis. Geochemical proxies are essential for investigation of oceanic, climatic, tectonic and environmental conditions in ancient depositional systems, and recent years have seen the development of many new elemental, isotopic, and biomarker proxies that can be used to reconstruct redox, sea surface temperature, productivity, nutrient cycling, salinity, alkalinity, and other properties. Large, multiproxy datasets are now routinely generated in many studies, providing more accurate reconstructions of changing climatic and environmental conditions in a given area. Meta-analysis of multiple-archive records (e.g., speleothem, lacustrine, loess, groundwater, marine, and ice core) commonly provides a foundation for larger-scale integrative studies. Astrochronological studies based on cyclic variation in climatic and environmental conditions driven by Earth’s orbital cycles provides a basis for high temporal resolution in paleoclimatic/paleoceanic studies and for refinement of the geologic time scale to a level of resolution (~104 yr) generally unobtainable based on traditional dating techniques, including biostratigraphy, magnetostratigraphy, radiometric dating, etc. This session will provide a general forum for new developments in deep-time paleoceanography.