A two day workshop at the Australian National University, March 16-17, 2020 exploring the dynamics of congested subduction zones.
- Louis Moresi (Research School of Earth Sciences, Australian National University, firstname.lastname@example.org)
- Peter Betts (School of Earth Atmosphere and Environment, Monash University, email@example.com)
- Joanne Whittaker (Institute for Marine and Antarctic Studies, University of Tasmania, firstname.lastname@example.org)
- Meghan Miller (Research School of Earth Sciences, Australian National University, email@example.com)
Subduction zones suck the cold oceanic plates down into the mantle, releasing gravitational potential energy and driving the global geological circulation. They naturally attempt to ingest all the anomalously buoyant material embedded in the oceanic plates including seamounts, under-plated plume materials, large igneous provinces, micro-continents and even the continents themselves. This is a fundamental component of the geological canon for which there is very little holistic, predictive dynamic modelling and many outstanding questions. At congested subduction zones there is a competition between positive and negative buoyancy from which complex structure is emergent.
Congested subduction zones necessarily evolve in three dimensions. The response of a subduction zone in response to ingestion of buoyant material is a predictable evolution in the planform of the subduction system, the formation of slab windows, and a time-dependent change in the stress-state of the over-riding plate.
Monday, March 16, 2020 — Tuesday, March 17, 2020 (Mt Stromlo)
|―||Welcome coffee & introduction||―|
|Monday am||Congested subduction: theory & observations||Peter Betts, Louis Moresi, Roberta Carluccio, Rebecca Farrington, Caroline Eakin|
|Monday am||Signatures of congestion in the record of arc volcanism|
|Monday pm||Regions: The Banda subduction system||Brendan Duffy, Ping Zhang, Meghan Miller, Hendro Nugroho, Simon McClusky|
|Monday pm||Drinks / Posters||♨|
|Tuesday am||Regions: The Alaskan subduction system||Sarah Roeske, Meghan Miller, Ben Mather, Chengxin Jiang|
|Tuesday am||Regions: The New Zealand subduction system||Robert Pickle, Pete Betts, Joanne Whittaker, Brendan Duffy, David Willis|
|Tuesday pm||Regions: The Himalayan collision||―|
|―||Drinks / Dinner (Optional)||―|
Wednesday, March 18 (Technical workshop at RSES)
This workshop is supported by the Australian Research Council through the Discovery Grant Program (DP150102887)