Thread: GSA 2019 Session T19: "Subduction Zone Systems: Geochemical, Petrochronological, and Geophysical Constraints on Lithospheric Structure, Composition, and Geodynamics"

Started: 2019-05-02 11:17:33
Last activity: 2019-05-02 11:17:33
Topics: GSA Meetings
Dear Colleagues,

Please consider submitting an abstract to the following session at the GSA
Fall meeting in Phoenix, Arizona (22-25 Sept 2019) (*abstract* *deadline:
Tuesday, June 25th, 2019*)
*T19. Subduction Zone Systems: Geochemical, Petrochronological, and
Geophysical Constraints on Lithospheric Structure, Composition, and

Subduction zones display a rich diversity in magmatic, tectonic and
metamorphic processes at a wide range of spatial and temporal scales.
Viewed as major crust producing, refining and recycling factories, their
evolution greatly influences the chemical composition and physical
characteristics of the upper plate lithosphere that is subsequently
involved in accretion and collisional orogens. Recent and ongoing studies
focus on a comprehensive suite of onshore/offshore records in subduction
zone and exposed terranes preserved in orogens, helping us understand
several aspects of supra-subduction dynamics, such as subduction
initiation, timing of magmatism and accretionary processes as well as their
contribution to the production of continental crust. Understanding the
evolution of modern arc lithosphere during subduction and collisional
tectonics requires interdisciplinary research and methods. We invite
contributions dedicated to understanding subduction zones and collisional
orogens, including but not limited to: petrological, microstructural,
geochemical and geochronological studies on rocks from exhumed and/or
active settings (e.g., ECORD-IODP programs), petrological experiments and
modeling, geophysical studies in active subduction settings and analogue /
numerical geodynamic modelling. These contributions could involve: (i)
Characterizing magmas and fluids transfers during subduction and their
implications on upper plate lithosphere evolution, (ii) Understanding
mechanisms and timing of arc thickening and maturation (i.e. magmatic
flare-ups, deep differentiation processes, deep crustal foundering,
intra-arc deformation), (iii) Examining the evolution of the nature and
dynamics of supra-subduction zones from potential Archean records to recent
observations, (iv) Assessing the influences of subduction on the igneous
evolution of orogenic belts especially during the collisional and post-
collisional phases, (v) Identifying deformation mechanisms and structures
of active subduction and collisional settings from seismic properties and
magnetotelluric measurements.
*Conveners: *
Antoine Triantafyllou (U Arizona)
Mihai Ducea (U Arizona)
Jonathan Delph (U Oregon)
Mark Reagan (U Iowa)

Looking forward to seeing you Phoenix!

Jonathan Delph
Post-doctoral Researcher
University of Oregon

01:11:50 v.eb79165e