Web: https://conf.goldschmidt.info/goldschmidt/2023/goldschmidt/2023/meetingapp.cgi
Includes the following sessions:
5f – Large Igneous Provinces (LIPs): their plumbing systems, and links with plumes, supercontinent breakup, ore deposits, and environmental change through Earth history
Convenors: Hafida El Bilali, Isabel Fendley (isabel.fendley@earth.ox.ac.uk), Sara Callegaro (sara.callegaro@geo.uio.no), Hamed Sanei (sanei@geo.au.dk), Joshua Davies (davies.joshua@uqam.ca), Richard Ernst (richard.ernst@carleton.ca)
The record of Large Igneous Provinces (LIPs) is continually expanding back in time and now includes events older than 3 Ga. Associated with this expanding LIP record, there is now an increased understanding of LIP plumbing systems and origin (typically associated with mantle plumes). LIPs are now recognized to have played a key role in major geodynamic processes, including formation and evolution of the lithosphere, and supercontinent breakup. These important phenomena also frequently coincide with complex environmental changes, including mass extinctions, oceanic anoxic events, hyperthermal events, global glaciations, regional topographic changes, ore deposit formation, and significant silicic magmatism (SLIPs), carbonatites and kimberlites. We welcome contributions from a diverse range of disciplines to encourage cross-fertilization of ideas and a multi-faceted discussion of LIP systems, including igneous and sedimentary geochemistry, experimental petrology, geochronology, and studies utilising chemical and biological proxies in the stratigraphic record. Novel and provocative contributions are particularly encouraged, as well as those from groups underrepresented in the geoscience community.
8f - A holistic approach to critical events during the Phanerozoic: from OAEs to mass extinctions
Convenors: Yogaraj Banerjee (ybanerjee15@gmail.com), Xinyuan Zheng (zhengxy@umn.edu), Audrey Morrison, Hana Jurikova (hj43@st-andrews.ac.uk), Lawrence Percival (lawrence.percival@vub.be), Nigel Blamey (nblamey2@uwo.ca)
Over the Phanerozoic Eon, the Earth witnessed several episodes of abrupt change in the surface environment and the biosphere. These included the ‘Big Five’ mass extinctions, ocean anoxic events (OAEs), rapid climate warming/cooling spells, and multiple other ‘more minor’ biotic crises. The perturbations in biogeochemical cycles during those times often led to the rapid and widespread disappearance of marine and terrestrial biota, as well as setting the stage for new ones to emerge. Although progress has been made in unravelling some of the factors and conditions driving abrupt environmental, climatic and biogeochemical changes during these events, there are still considerable shortcomings towards a holistic understanding of the underlying causes of these critical events, and the complex interactions between the physical, chemical and biological components of the biosphere during these time periods. Deconvolving the complex interactions between different components of the Earth system, including the solid Earth, hydrosphere, atmosphere, and biosphere during those episodes offers a better understanding of how the Earth operates as an integrated system, and also provides useful insights into possible Earth-System changes in the future. This session invites contributions that help to elucidate the driving forces behind these critical events (such as OAEs, PETM, K/Pg, end Permian, etc.) and the environment-biota interactions during intervals of rapid environmental change in the Phanerozoic. We welcome studies that use proxy, modelling and integrated approaches. The overarching aim is to foster discussion and synthesis of recent advances in the field.