V13C:
Generation and Storage of Silicic Magmas in Hydrothermally Preconditioned Crust Posters


Submit an Abstract to this Session


Session ID#: 47391

Session Description:
The generation of low-δ18O silicic magmas by melting of hydrothermally altered crust is a central but poorly understood process in some magmatic systems. Important examples include the Snake River Plain - Yellowstone hotspot track, where low-δ18O rhyolite bodies have fed large caldera-forming eruptions, and Iceland, where generation of low-δ18O rhyolite in mafic crust provides a controversial analogue for differentiation of Earth's earliest silicic crust. Understanding the processes by which low-δ18O silicic magmas are generated and stored has important and far-reaching implications, including insights into the genesis of magmatic-hydrothermal ore deposits and the evolution of continental crust, the mitigation of volcanic risk, and geothermal energy production.

This session aims to connect diverse studies of silicic magmatism in hydrothermally altered crust, addressing the genesis of low-δ18O silicic magmas, the timescales and dynamics of these magma systems, and their economic and societal implications.

Primary Convener:  Shane M Rooyakkers, GNS Science, Earth & Planetary Sciences, Lower Hutt, New Zealand
Conveners:  John Stix, McGill University, Earth & Planetary Sciences, Montreal, QC, Canada and Tamara Carley, Lafayette College, Easton, PA, United States
Primary Liaison:  Shane M Rooyakkers, GNS Science, Earth & Planetary Sciences, Lower Hutt, New Zealand
Chairs:  Shane M Rooyakkers, GNS Science, Earth & Planetary Sciences, Lower Hutt, New Zealand, John Stix, McGill University, Earth & Planetary Sciences, Montreal, QC, Canada and Tamara Carley, Lafayette College, Geology and Environmental Geosciences, Easton, United States
OSPA Liaison:  John Stix, McGill University, Earth & Planetary Sciences, Montreal, QC, Canada
Index Terms:

1036 Magma chamber processes [GEOCHEMISTRY]
1037 Magma genesis and partial melting [GEOCHEMISTRY]
8424 Hydrothermal systems [VOLCANOLOGY]
8439 Physics and chemistry of magma bodies [VOLCANOLOGY]

Abstracts Submitted to this Session:

Unexpected Rhyolites: A Microanalytical Isotopic Investigation of Rhyolitic Domes at Krafla, Iceland based on (396169)
Rachel Hampton, University of Oregon, Eugene, OR, United States, Ilya Bindeman, University of Oregon, Department of Earth Sciences, Eugene, OR, United States, Richard A Stern, University of Alberta, Earth and Atmospheric Sciences, Edmonton, AB, Canada and Matthew A Coble, Stanford University, Stanford, CA, United States
Generation of Low-δ18O Silicic Magma by Cannibalization of Hydrothermally Altered Rhyolite and Granite Precursors: The Kimberly Rhyolite, Yellowstone Hotspot Track, Idaho (469238)
Eric H Christiansen1, Danielle J Spencer1, Michael Dorais1, Ilya Bindeman2, Dylan Colon3, John W Shervais4 and Katelyn Wheldon1, (1)Brigham Young University, Geological Sciences, Provo, UT, United States, (2)University of Oregon, Department of Earth Sciences, Eugene, OR, United States, (3)University of Oregon, Earth Sciences, Eugene, OR, United States, (4)Utah State University, Department of Geosciences, Logan, UT, United States
Genesis and significance of low-δ18O igneous rocks from observational and modeling perspective (Invited) (344130)
Ilya Bindeman, University of Oregon, Department of Earth Sciences, Eugene, OR, United States
Iceland Deep Drilling Project Explores the Magma-Hydrothermal Interface (414079)
Robert A Zierenberg, University of California Davis, Earth and Planetary Sciences, Davis, United States, Peter Schiffman, Univ California, Davis, CA, United States, Andrew P Fowler, University of California Davis, Davis, CA, United States, Wilfred A Elders, University of California, Earth Sciences, Riverside, CA, United States, Gudmundur Ómar Fridleifsson, HS Orka hf, Reykjanesbæ, Iceland and Mark H Reed, Univ Oregon, Eugene, OR, United States
Oxygen Isotopic Record of Silicic Magma Genesis in Iceland through Time: Evidence Suggests Abrupt Late Pleistocene Onset of Glacial Climate Influence (Invited) (344148)
Calvin F Miller, Vanderbilt University, Earth and Environmental Sciences, Nashville, United States, Tamara Carley, Lafayette College, Easton, PA, United States, Axel Karl Schmitt, University of Heidelberg, Institute of Earth Sciences, Heidelberg, Germany, Tenley J. Banik, Illinois State University, Geography, Geology, and the Environment, Normal, IL, United States, Abraham J Padilla, U.S. Geological Survey, National Minerals Information Center, Reston, TN, United States and Rita C Economos, Southern Methodist University, Earth Sciences, Dallas, United States

See more of: Volcanology, Geochemistry and Petrology