Location: Moscone Center, San Francisco, California, USA
Includes the following sessions:
DI13A: Linking the Earth's surface with the deep interior: comparing predictions and observations of mantle plumes
Mantle plumes and alternative forms of mantle upwellings provide a direct window into the composition and dynamics of the Earth's deep interior. Their composition and dynamics are explored with a variety of geophysical and geochemical methods. In this session we invite contributions from seismology, geochemistry, petrology, tectonics and geodynamics on topics such as: progress in seismic imaging of mantle upwellings, understanding plume motions in the convective mantle, exploring possible links between lower mantle structures and active hotspots, constraining the origin of geochemical zonation of hotspot lavas, and evaluating the role of shallow melting processes on lava compositions.
V11C: Ocean islands and large igneous provinces
Despite temporally diminutive volume relative to mid-ocean ridge basalts, studies of large igneous provinces (LIP) in oceans and continents and ocean island basalts (OIB) inform on mantle evolution. LIP can represent short-duration high-productivity magmatism and some OIB require thermal/chemical mantle anomalies. Thus, OIB/LIP may require a plume source. This session aims to advance understanding of OIB/LIP magmatism. Specifically, what can OIB/LIP tell us about mantle processes, domain ages, and compositional variability? What significance do end-members (c.f., PREMA, EM, HIMU) hold in OIB and are they present in LIP? Can the timing and mass flux of outer core, subducted components and/or metasomatism into OIB/LIP mantle sources be quantified?
V31F: Permian-Triassic environmental and climatic extremes and biotic responses
The end-Permian is Earth's most severe extinction event and is associated with rapid global warming, perturbation of the carbon cycle, and oceanic acidification. The Siberian Traps LIP is commonly invoked as the main trigger. In this session, we invite a broad range of contributions with focus on the end-Permian and early Triassic including: plate-tectonics and geodynamics; rates, dates and chemical evolution of magmatism; volumes and geochemistry of volcanic and metamorphic gases; geochemical and environmental changes; climate evolution: data and models; paleobiology of extinction and recovery. We encourage experts from disparate fields to share new ideas to understand this singular event in Earth history.
V33F: Magma plumbing, transport and eruption at basaltic volcanoes
Improved volcano monitoring and data analysis present expanded possibilities for studying volcanic processes, especially those related to magma storage and transport. In addition to improved data streams, increasingly important is development of numerical and physics-based models. Frequent unrest at hotspot volcanoes provides important opportunities for studying magma plumbing systems using new data and modeling approaches. We welcome observations, interpretations, and models of transport and plumbing from hot spot volcanoes worldwide, and recent insights into factors influencing behaviors at individual volcanoes. Particularly welcome are approaches that cross disciplinary boundaries, as well as comparative studies of different volcanoes.