EGU 2016. Magma-tectonic processes in continental rifts: combining perspectives from ancient rifted margins and zones of active spreading
*****************************************************************************************************
Dear all,
Apologies for cross-postings. Giacomo Corti, Carolina Pagli, and I would like to invite you to take part in our session at the EGU General Assembly on 17–22 April 2016 in Vienna. Note that the abstract deadline of the 13th January, 2016 is fast approaching.
“Magma-tectonic processes in continental rifts: combining perspectives from ancient rifted margins and zones of active spreading” (TS5.2/GMPV5.12; http://meetingorganizer.copernicus.org/EGU2016/session/20505)"
We are delighted to reveal Rikke Pedersen as a solicited presenter. Further information is provided below:
Continental break-up is commonly associated with the development of normal faults, the formation of sedimentary rift basins, and magmatic activity. Interactions between these processes control the geometry and connectivity of magma conduits and reservoirs, potentially influencing the entire margin evolution and the transition to seafloor spreading. Defining plumbing system structure can therefore provide important insights into: (1) the stage of continental rifting; (2) the chemical evolution of magma and its migration through the lithosphere; (3) host rock deformation induced by magma movements; and (4) volcanic eruption locations and styles. However, limitations in exposure at the Earth's surface makes reconstructing magma plumbing systems challenging. It is therefore important to integrate field observations with data that provide insights into magma pathways and storage. In areas of active continental break-up or oceanic spreading, indirect analytical approaches commonly involve: (1) ground deformation data (e.g., InSAR and GPS) to define the geometries and volumes of magma emplacement; (2) petrological and geochemical data to asses magma contamination, residence times, crystallization histories, and melt source conditions; and/or (3) mapping both crystallized and melt intrusions using geophysical techniques such as potential field, magnetotellurics and seismicity. Conversely, seismic reflection data has revolutionized our understanding of plumbing systems in rifted margin settings.
This session aims to bring together a range of Earth Scientists, who employ different techniques, to discuss magma-tectonic interactions observed in areas of active or ancient lithospheric extension. We particularly welcome contributions that asses various magma-tectonic processes, using different geological and geophysical techniques, occurring during the active break-up of East Africa or Iceland or the ancient extension and subsequent evolution of rifted margins. We are particularly interested in works that attempt to bridge the gap between active and ancient break-up studies.
We hope you have a happy festive season and a good new year.
Kind regards,
Craig (on behalf of Carolina and Giacomo)
Volcano Listserv is a collaborative venture among Arizona State University (ASU), Portland State University (PSU), the Global Volcanism Program (GVP) of the Smithsonian Institution's National Museum of Natural History, and the International Association for Volcanology and Chemistry of the Earth's Interior (IAVCEI).
ASU - http://www.asu.edu/ PSU - http://pdx.edu/ GVP - http://www.volcano.si.edu/ IAVCEI - http://www.iavcei.org/
To unsubscribe from the volcano list, send the message: signoff volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxx.
To contribute to the volcano list, send your message to: volcano@xxxxxxx. Please do not send attachments.
==============================================================
