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AlpArray Magnetotelluric
MT Group at the GFZ
12E swath meeting, 18. Juli , 11:00 - 17:00
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• Three-dimensional electrical conductivity structure of the entire Alps using MT array data
• High-resolution electrical conductivity images of the Periadriactic Fault system (12E Swath)
Field Setups
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Regional Scale
Field Setup:- ~ 160 sites, 40-50 km site spacing- Long period data recording time ~ 1 month.- Instruments National German Instrument Pool (GIPP-MT)
Collaboration:U. Cologne: B. Tezkan FU Berlin: H. BrasseU. Frankfurt: A. Junge U. Münster: M. BeckenU. Oulu: T. Korja U. Barcelona: J. Pous Czech A. Science: J. PekU. Leicester: M. Moorkamp ETH Zurich: A. Kuvshinov CNR – IGG: Adele Manzella
Total Cost: 660k€- Field experiment 150k€- 1 PostDoc (36 PM, TvÖD13) 225k€- 1 PhD (36 PM, TvÖD13, 75%) 169k€- 4 Student helper (36PM) 56k€- Travel 60k€.
Key points:Imaging lower crust uppermost mantle:- Transition from the western to
the eastern Alps.- Active and fossil fault
systems.- Provide boundary values for
further localized MT experiments.
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Local Scale
http://www.geophysik.uni-muenchen.de/research/seismics/transalp
Total cost: 313k€- Field experiment 100k€- 1 PhD (36 PM, TvÖD13, 75%) 169k€- 1 Student helper (36PM, 40h/month) 14k€- Travel 30k€.
Personal:Mainly the GFZ MT working group
Key points:Imaging crustal structures including:- Shear zones: possible pathways for
mantle fluids,- active and fossil fault systems,- the boundary between the European and
Adriatic plates.- ~ 2 km km site spacing- Broad Band data recording time 3-4 days.- The duration of the field experiment: 6-8 weeks.
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Thank You
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CVA: Cascade volcanic arc; NBR: Northern Basin and Range; SRP: Snake River Plain; YS: Yellowstone; GFTZ: Great Falls Tectonic Zone; CB: Cheyenne Belt; CRP: Columbia River Plateau; MHB: Medicine Hat Block; CP: Colorado Plateau; VS: Vulcan Suture; BA1: Back arc upwelling. White dashed line represents the outline of Siletzia embayment as imaged by Humphreys (2008) and Gao et al. (2011)
USArray-MT
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USArray-MT: Typical cross-section
Meqbel et al. (2013, in review)
Subduction systemActive zone
Cratonic stabile zone