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GMPV2/IG20 Magma mixing and its role in producing compositional diversity in igneous rocks: petrological and volcanological issues
From: Diego Perugini <diegop@xxxxxxxx>
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Dear Colleagues,
We would like to draw your attention to the following session, which we propose for the next EGU (European Geosciences Union) meeting in Vienna (03 – 08 April 2011). Please consider attending the meeting and submitting an abstract.
Sincerely Yours
Cristina
Diego
http://meetings.copernicus.org/egu2011/abstract_management/how_to_submit_an_abstract.html
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GMPV2/IG20
Magma mixing and its role in producing compositional diversity in igneous rocks: petrological and volcanological issues
Convener: Diego Perugini
Co-Convener: Cristina De Campos
Magma mixing is a process of undoubted importance in the Earth system. Understanding its development, both in space and time, is crucial for understanding its impact on the genesis of igneous rocks, both near the Earth surface and in its deeper interior. >From a petrological point of view, investigation of the interaction between mafic and felsic magmas is often essential for deciphering the chemical composition of the end-member primary melts, the latter often essential for constraining tectonic settings. From a volcanological point of view, the replenishment of a sub-volcanic magma reservoir with less evolved magmas is considered to be one of the processes triggering explosive eruptions.
Although increasing natural evidence indicates magma mixing as a major petrological process in the Earth system, several questions still remain open. Among them: which rheological conditions promote or inhibit mixing processes? What is the spatial and temporal compositional variability of igneous systems affected by magma mixing processes? How do geochemical heterogeneities produced by mixing processes influence the composition and textures of crystallizing minerals? What are the time-scales for magma mixing and hybrid melt production? What are the time-scales of volcanic eruptions triggered by magma mixing processes?
This session invites contributions focussed on the structural (field relations), textural (zoning, resorption, chemical and isotopic disequilibrium in minerals), and geochemical (major and trace elements and isotopes) study of magma interaction processes in both plutonic and volcanic environments. Contributions targeting the study of magma mixing by experimental, theoretical and numerical modelling are also welcome.
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P.S.: We are sorry for multiple posting.
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