T031
Mantle Metasomatism in Active Lithosphere from Subduction to Post-Collision

Session ID#: 83613

Session Description:
Metasomatic changes in mantle rocks associated with subduction play a critical role in determining the chemical and isotopic characteristics of magmas produced during and after subduction. Our understanding of geodynamic behavior in subduction zones now urgently requires linking the mineralogical products of mantle metasomatism with the physical properties of mantle domains resolved by geophysical data. Deployments of large-scale geophysical arrays which record both seismic and magnetotelluric data, such as USarray, provide excellent opportunities to develop a more systematic view of the mantle lithosphere. This session encourages integrative and multidisciplinary research which aims to understand the role of mantle metasomatism in lithospheric evolution as well as the flux of volatiles through active lithosphere. We welcome integrative contributions from field, petrological, geochemical, geophysical, experimental and geodynamic modeling studies that focus on investigating mantle metasomatism and its profound effect on shaping our planet.
Index Terms:

1025 Composition of the mantle [GEOCHEMISTRY]
1038 Mantle processes [GEOCHEMISTRY]
8120 Dynamics of lithosphere and mantle: general [TECTONOPHYSICS]
8178 Tectonics and magmatism [TECTONOPHYSICS]

Primary Convener:  Steven M Hansen, Macquarie University, Sydney, NSW, Australia
Conveners:  Stephen F Foley, Macquarie University, Department of Earth and Planetary Sciences, Sydney, NSW, Australia, Yu Wang, GIG Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China and Michael Forster, Macquarie University, Faculty of Science and Engineering, Sydney, Australia
Primary Liaison:  Steven M Hansen, Macquarie University, Sydney, NSW, Australia
 
Distribution of trace elements between low-Ca pyroxene and basaltic melts with applications to pyroxenite-derived melt and peridotite interaction in a lithologically heterogeneous mantle (Invited) (485914)
Ananya Mallik, University of Rhode Island, Geosciences, Kingston, RI, United States, Jasper Kenzo Miura, Brown University, Providence, RI, United States and Yan Liang, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, RI, United States
 
High pressure melting of eclogites and metasomatism of garnet peridotites from Monte Duria Area (Central Alps, N Italy): a proxy of focussed flow of adakite-like melts into the mantle at subduction zones (509815)
Luca Pellegrino1, Nadia Malaspina1, Stefano Zanchetta1 and Simone Tumiati2, (1)University of Milano-Bicocca, Earth and Environmental Sciences, Milano, Italy, (2)Università degli Studi di Milano, Dipartimento di Scienze della Terra, Milan, Italy
 
The seismic signature of oxidizing metasomatic fluids (Invited) (562570)
Ulrich Faul, Massachusetts Institute of Technology, Earth Atmospheric and Planetary Sciences, Cambridge, MA, United States, Christopher Joseph Cline II, Australian National University, Canberra, ACT, Australia and Ian Jackson, Australian Natl Univ, Canberra, Australia
 
Carbonate transfer from subducting slab to mantle wedge by diapirism and melting (573052)
Chunfei Chen, Sydeny, New South Wales, Australia, Michael Forster, Macquarie University, Faculty of Science and Engineering, Sydney, Australia, Stephen F Foley, Macquarie University, Department of Earth and Planetary Sciences, Sydney, NSW, Australia and Yongsheng Liu, China University of Geosciences Wuhan, Wuhan, China
See more of: Tectonophysics
<< Previous Session Proposal | Next Session Proposal >>