1-1-1-1-1-1-1-1-1-1-1-1-1-1 From: "Eichelberger, John C (DNR)" <john.eichelberger@xxxxxxxxxx> *Session ID:* 251772 *Session Title:* V031: The Superhot Hydrothermal to Magma Transition: A Scientific Frontier and a Prime Target for Geothermal Energy *Section:* Volcanology, Geochemistry and Petrology *View Session Details in the User Portal:* *https://agu.confex.com/agu/AGU25/gateway.cgi <https://agu.confex.com/agu/agu25/gateway.cgi>* Dear colleagues, Please consider submitting an abstract to the special VPG session on â??The Superhot to Magma Transitionâ?? noted above, convened by Charles Carrigan, Paolo Papale, Paul Choate, and myself. For volcanologists and petrologists, this is a critical zone for understanding the processes of magmatic differentiation and contamination. After the decline of the stratified magma chamber with sidewall fractionation paradigm, no new dominant paradigm seems to have emerged beyond recognition that these are trans-crustal systems containing some to mostly mush. The transition from magma to the hydrothermal zone has also been invoked for explaining inflation/deflation cycles at calderas and is the rate controlling step in heat loss from magma bodies. Meanwhile, geothermal scientists and engineers have come to view the superhot regime, the source of which is magma at depths accessible by drilling, as the prime target for the next generation of geothermal energy. What do we know about this domain from geophysics, geologic exposures, modeling, and physical and chemical properties from logging and samples from drilling? Understand this zone is important for geothermal energy, volcanic hazards, and fundamental science. 1-1-1-1-1-1-1-1-1-1-1-1-1-1 ------------------------------
