V31D:
Cumulates from Top to Bottom: New Perspectives and Implications for Volcanic Plumbing Systems and Crust-Forming Processes I

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Session ID#: 18001

Session Description:
Fragmented, cumulative plutonic rocks are variably present in ejecta of many volcanic systems in different tectonic settings. These rocks provide a window into sub-volcano magmatic plumbing systems. They are products of magmatic differentiation in the crust and crust-mantle transition zone, and record varying extents of interaction between melts and crystals. Formation of mafic cumulates is key to the evolution of the Earth’s crust. Given the importance of these processes, there are numerous current studies focused on cumulative plutonic rocks and intrusive complexes in volcanic arcs, mid-ocean ridges and intra-plate settings. This session will bring together multidisciplinary studies that focus on cumulate formation and the larger-scale role cumulates play in the generation and evolution of magmas and the crust. Contributions are sought from all relevant studies involving cumulates including, but not limited to, field investigations, textural studies, geochemistry, mineralogy, experiments, geophysics, numerical and thermodynamic modelling.
Primary Convener:  George Frederick Cooper, University of Durham, Department of Earth Sciences, Durham, United Kingdom
Conveners:  Luca Ziberna, Bayerisches Geoinstitut, Bayreuth, Germany, Richard J Arculus, Australian National University, Research School of Earth Sciences, Canberra, Australia and Jon Davidson, University of Durham, Durham, United Kingdom
Chairs:  Luca Ziberna, Bayerisches Geoinstitut, Bayreuth, Germany, Richard J Arculus, Australian National University, Research School of Earth Sciences, Canberra, Australia, George Frederick Cooper, University of Durham, Department of Earth Sciences, Durham, United Kingdom and Jon Davidson, University of Durham, Durham, United Kingdom
OSPA Liaison:  Luca Ziberna, Bayerisches Geoinstitut, Bayreuth, Germany
Index Terms:

1020 Composition of the continental crust [GEOCHEMISTRY]
1021 Composition of the oceanic crust [GEOCHEMISTRY]
1031 Subduction zone processes [GEOCHEMISTRY]
8439 Physics and chemistry of magma bodies [VOLCANOLOGY]

Abstracts Submitted to this Session:

Dihedral Angles As A Diagnostic Tool For Interpreting The Cooling History Of Mafic Rocks (Invited) (117563)
Marian B Holness, University of Cambridge, Earth Sciences, Cambridge, United Kingdom
Formation of Anorthite-bearing Blocks and Crystal Ejecta in Volcanic Systems: a Role for the Azeotrope in the Plagioclase System? (157321)
Hanna Nekvasil1, D R Schaub2, Tristan Catalano1, Nicholas DiFrancesco3 and Donald H Lindsley3, (1)Stony Brook University, Geosciences, Stony Brook, NY, United States, (2)Stony Brook University, Geosciences, Stony Brook, United States, (3)Stony Brook University, Stony Brook, NY, United States
Modeling the re-equilibration processes between melt inclusions and their host plagioclase megacrysts in Plagioclase Ultraphyric Basalts (131819)
Melissa J Drignon1, Roger L Nielsen1, Alisa Kotash2 and Frank J Tepley III1, (1)Oregon State University, CEOAS, Corvallis, OR, United States, (2)Oregon State University, Corvallis, OR, United States
Fractional crystallization, impregnation and sulphide saturation recorded in Mesozoic arc-related cumulates at King Mountain, Cache Creek Ophiolite, Northern British Columbia. (128398)
Jean H J Bedard, Geological Survey of Canada, Quebec, QC, Canada, Alexandre Zagorevski, Geological Survey of Canada, Ottawa, ON, Canada and Anne-Sophie Corriveau, Institut National de la Recherche Scientifique-Eau Terre Environnement INRS-ETE, Quebec City, QC, Canada
Identification and quantification of gabbro cumulate partial melting in mafic igneous complexes (Invited) (118741)
Julien Leuthold, ETH Zürich, Institute of Geochemistry and Petrology, Zürich, Switzerland
The Deep Crust Magmatic Refinery, Part 2 : The Magmatic Output of Numerical Models. (158487)
Pierre Bouilhol, Durham University, Durham, United Kingdom, Nicolas Riel Jr, University of Durham, Earth Sciences, Durham, United Kingdom and Jeroen Van Hunen, University of Durham, Department of Earth Sciences, Durham, United Kingdom
Emplacement and Post-Emplacement Dynamics of Basaltic Intrusions In Continental Crust (130884)
Alberto M. Roman, Institut de Physique du Globe de Paris, Paris, France and Claude P Jaupart, Université de Paris, Institut de Physique du Globe de Paris (IPGP), UMR 7154, Paris, France
Understanding deep cumulates: insights into crust-building processes across time and tectonic setting (194285)
Emily J Chin, Scripps Institution of Oceanography, Geoscience Research Division, La Jolla, United States, Grant Michael Bybee, University of the Witwatersrand, School of Geosciences, Johannesburg, South Africa and Kei Shimizu, Brown University, Department of Geological Sciences, Providence, RI, United States

See more of: Volcanology, Geochemistry and Petrology