EGU General Assembly 2007
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  Information - GD05 The Origins of Melting Anomalies

Event Information
Opinion has recently diversified concerning the origins of “hot spot” volcanism on Earth’s surface. The deep mantle Plume model has been joined by alternatives including the “Plate” model, that advocates shallow causative structures and processes. These developments have re-opened the question of the origins of individual volcanic anomalies, and have influenced thinking on many fundamental generic aspects. These aspects include the temperature, composition and homogeneity of the mantle, the origin of ocean-island-basalt geochemical signatures, the relationship between surface tectonics and magmatism, the interpretation of mantle tomography images, and the relationship between mantle convection models and surface geology. New emphasis has been placed on the need for cross-disciplinary collaboration and interpretations, and “joined-up” science. This multi-disciplinary session will include papers that shed new light on the origins of intraplate or large-volume ridge-centered magmatism, linear volcanic chains and large igneous provinces. It will include observations, case-histories, theory, and models covering geophysics, geochemistry, petrology, heat and temperature, tectonics, mantle dynamics and integrated studies, along with syntheses reconciling data from more than one subdiscipline. Oral presentations will include talks advocating the entire spectrum of models, including Plume, Plate and alternatives. Time will be reserved for open discussion and comments. A lively session is anticipated.

Preliminary List of Solicited Speakers


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