Isotopic and Geochemical Reconstruction of Ancient Marine Environments and Climate
This research community reconstructs the chemical and biological history of Earth's oceans and atmosphere by analyzing stable isotopes and trace elements preserved in sedimentary rocks. The work aims to understand past climate states, mass extinction events, and the evolution of marine chemistry over geological time.
The community focuses heavily on carbon, oxygen, and rare earth element isotopes found in carbonate and silicate sediments. Recurring methodologies include clumped isotope thermometry, mass-independent fractionation analysis, and trace element profiling in basin deposits. Key applications involve dating mass extinction events, such as those in the Early Cambrian, and reconstructing paleotemperatures and ocean anoxia in regions like the South China Basin, the Pacific Ocean, and the Indian Ocean. The work frequently examines banded iron formations and organic carbon preservation to infer ancient redox conditions and atmospheric composition.
The largest share of the community's output is found in manganese research, comprising 2.2% of all manganese research, followed by strontium at 3.8% and uranium at 1.6%. In terms of raw paper volume, carbon contributes the most papers with 6,381 entries, followed by oxygen with 4,695 and iron with 4,060.
The community comprises 46,426 papers, primarily published in Geochimica et Cosmochimica Acta, Chemical Geology, and Earth and Planetary Science Letters.
Recent work includes investigating heavy metal toxicity as a driver of past biodiversity crises, analyzing rare earth element adsorption in clay deposits, and examining the environmental impacts of deep-sea mining.