V41D:
Where Arc Magmas Reside: Comparing the Volcanic and Plutonic Records I


Session ID#: 9834

Session Description:
Magmatic processes are powerful agents for creating and reworking the Earth’s crust. Passage and stalling of magmas in arcs brings new material into the crust and drives interactions with wall rock, magma mixing and fractionation, leaving complex crystal histories in both volcanic and plutonic rocks. In intrusive terrains, field relationships, aureole or igneous thermobarometry, and physical modeling inform where magmas reside and get modified. Erupted magmas carry quenched time series of mineralogical and compositional imprints of their crustal traverse.  We invite contributions that use continental arc igneous assemblages to understand magma accumulation and residence in the crust, investigate magma-crust interactions and crustal assimilation, and the processes of magma mobility and eruptibility. We welcome discussions on the nature of plutonic versus volcanic rocks (cumulates/fractionates versus compositional equivalents) and volcanic-plutonic volume ratios. Contributions are welcome from petrology, geochemistry, geophysics, modelling and related fields.
Primary Convener:  Valbone Memeti, California State University Fullerton, Fullerton, CA, United States
Conveners:  Gary Michelfelder1, Anita Grunder2 and Emily E. Salings1, (1)Missouri State University, Springfield, MO, United States(2)Oregon State University, CEOAS, Corvallis, OR, United States
Chairs:  Valbone Memeti1, Gary Michelfelder2, Emily E. Salings2 and Anita Grunder3, (1)California State University Fullerton, Fullerton, CA, United States(2)Missouri State University, Springfield, MO, United States(3)Oregon State Univ, CEOAS, Corvallis, OR, United States
OSPA Liaison:  Valbone Memeti, California State University Fullerton, Fullerton, CA, United States

Cross-Listed:
  • S - Seismology
  • T - Tectonophysics
Co-Sponsor(s):
  • GS: Geochemical Society - Geochemical Society
  • MSA: Mineralogical Society of America - Mineralogical Society of America
Index Terms:

1037 Magma genesis and partial melting [GEOCHEMISTRY]
3618 Magma chamber processes [MINERALOGY AND PETROLOGY]
3640 Igneous petrology [MINERALOGY AND PETROLOGY]
8170 Subduction zone processes [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Decoupling of the Assimilation and Fractionation Signatures in a MASH Zone: Evidence from the Sierra Valle Fértil Mafic Zone, Argentina (Invited) (84101)
Barry A Walker Jr1, George W Bergantz2, Juan Otamendi3, Mihai Nicolae Ducea4 and Eber Cristofolini3, (1)Washington State University Vancouver, Vancouver, WA, United States, (2)Univ Washington, Seattle, WA, United States, (3)Universidad Nacional de Río Cuarto, Río Cuarto, Argentina, (4)University of Arizona, Geosciences, Tucson, United States
The Record of Magma Accumulation Processes and Magma-Crust Interactions in Arcs from Ultramafic Intrusions with Ni-Cu-PGE Mineralization (81578)
James S Scoates1, Matthew Manor1, Sarah Jackson-Brown1, Graham T Nixon2 and Doreen E. Ames3, (1)University of British Columbia, Vancouver, BC, Canada, (2)British Columbia Geological Survey, Victoria, BC, Canada, (3)Geological Survey of Canada, Ottawa, Canada
Zoning in hornblende as a key to petrologic evolution of sub-volcanic granitic plutons (Invited) (59329)
Calvin G Barnes1, Ryan Berry1 and W G Ernst2, (1)Texas Tech University, Geosciences, Lubbock, TX, United States, (2)Stanford University, Geological Sciences, Stanford, CA, United States
Zircon Geochemical and Isotopic Constraints on the Evolution of the Mount Givens Pluton, Central Sierra Nevada Batholith (85708)
Callie Sendek, San Jose State University, San Jose, CA, United States, Jade Star Lackey, Pomona College, Claremont, CA, United States, Jonathan S Miller, San Jose State University, Geology, San Jose, CA, United States, Gareth R Davies, Free University of Amsterdam, Amsterdam, Netherlands, John W Valley, University of Wisconsin Madison, WiscSIMS, Dept. of Geoscience, Madison, WI, United States and Kouki Kitajima, University of Wisconsin, Madison, United States
Evaluating the construction and evolution of upper crustal reservoirs with coupled U/Pb zircon geochronology and thermal modeling: A case study from the Mt. Capanne pluton (Elba, Italy) (Invited) (65405)
Melanie Barboni, University of California Los Angeles, Los Angeles, CA, United States, Catherine Annen, University of Bristol, Bristol, United Kingdom and Blair Schoene, Princeton University, Department of Geosciences, Princeton, NJ, United States
Crustal-scale perspective on the rapid development of Oligocene silicic calderas and related underlying plutonic systems, western Nevada USA (66301)
Joseph P Colgan1, David A John2, Christopher D. Henry3 and Kathryn E Watts2, (1)USGS-GECSC, Lakewood, CO, United States, (2)USGS, Geology, Minerals, Energy and Geophysics Science Center, Menlo Park, CA, United States, (3)University of Nevada Reno, Nevada Bureau of Mines and Geology, Reno, NV, United States
The crystal’s view of upper-crustal magma reservoirs (Invited) (62959)
Kari M Cooper1, Adam JR Kent2, Christian Huber3, Mark E Stelten4, Allison E Rubin1 and Kevin Schrecengost5, (1)University of California Davis, Earth and Planetary Sciences, Davis, CA, United States, (2)Oregon State University, College of Earth, Ocean, & Atmospheric Sciences, Corvallis, OR, United States, (3)Georgia Institute of Technology Main Campus, Earth and Atmospheric Sciences, Atlanta, GA, United States, (4)USGS Volcano Science Center Menlo Park, Menlo Park, United States, (5)University of California Davis, Davis, CA, United States
Temporal Evolution of Volcanic and Plutonic Magmas Related to Porphyry Copper Ores Based on Zircon Geochemistry (84323)
John H Dilles, Oregon State University, Corvallis, OR, United States, Robert G Lee, University of British Columbia, Earth and Oceanic Sciences, Vancouver, BC, Canada, Joseph L Wooden, Stanford University, Los Altos Hills, CA, United States and Alison M Koleszar, University of Texas-Austin, Austin, United States

See more of: Volcanology, Geochemistry and Petrology