Goldschmidt

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Start Date: 
Sunday, August 12, 2018
End Date: 
Friday, August 17, 2018

Web: https://goldschmidt.info/2018/index

Includes the following sessions:

04h Large Igneous Provinces, environmental change and mass extinctions: the deadly kiss of LIPs

Convenors: Feifei Zhang (fzhang48@asu.edu), Aisha Al-Suwaidi (aalsuwaidi@pi.ac.ae), Richard Ernst (richard.ernst@ernstgeosciences.com), Ying Cui (ying.cui@dartmouth.edu)

There is an increasing recognition of the role of Large Igneous Provinces (LIPs) in major environmental perturbations and mass extinction events. LIPs can affect the atmosphere and ocean through a wide array of processes including, but not limited to, carbon cycle perturbations, global warming, global cooling, acid rain, ash clouds, and enhanced hydrothermal and terrestrial nutrient fluxes . Some of these factors, in return, can lead to mass extinctions through eg. ocean anoxia and acidification and mercury poisoning. However, our current understanding of the connections between LIPs, environmental change, and mass extinctions is incomplete in many ways. The goal of this session is to bring together researchers approaching this problem from multiple perspectives. We welcome contributions that show: (1) geological, geochemical evidences of LIPs throughout geological time; (2) geochronological constraints on LIPs, (3) the interactions between the effects (direct and indirect) of LIPs and climatic change, (4) reconstructing changes in global weathering regime across the LIPs, (5) spatiotemporal constraints on marine chemical conditions (e.g., redox conditions, and ocean acidification) throughout LIPs from inorganic and organic proxies; (6) investigations of causal links between LIPs, environmental conditions, and the diversity and ecological structure of marine ecosystems during mass extinctions and subsequent recoveries. While these themes are best developed in the Phanerozoic we are also interested in contributions that identify Precambrian examples.

City: 
Boston, Massachusetts, USA