1. AlpArray Magnetotelluric
MT Group at the GFZ
12E swath meeting, 18. Juli , 11: :00

2. Field Setups
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)
We spitted our experiment into two field stepups:
1- A coarser station layout covering the entire Alps to drive a 3D regional image of the subsurafce electrical conductivities.
2- A higher resolution field setup focusing on the Periadriactic Fault system.

3. Regional Scale Total Cost: 660k€ Key points: Collaboration:
- 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.
Collaboration:
U. Cologne: B. Tezkan
FU Berlin: H. Brasse
U. Frankfurt: A. Junge
U. Münster: M. Becken
U. Oulu: T. Korja
U. Barcelona: J. Pous
Czech A. Science: J. Pek
U. Leicester: M. Moorkamp
ETH Zurich: A. Kuvshinov
CNR – IGG: Adele Manzella
A map showing the coarse field setup.
We are planning to cover an area of ~ 500^2 km.
We are trying to address structures related to the lower crust and uppermost mantle.
We are trying to engage national and international EM expertise in colleting and interpreting the MT data.
In broader perspective
Field Setup:
- ~ 160 sites, km site spacing
Long period data  recording time ~ 1 month.
Instruments  National German Instrument Pool (GIPP-MT)

4. Local Scale Key points: Total cost: 313k€
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.
On the local scale we will focus on the eastern part of the Alps. With the dense sites along the profile we are aiming to expose the electrical conductivies of the upper and middle crust.
In particular shear zones in the lower crust at the contact of the Adriatic and the European plate.
Define the boundary between the European and Adriatic plates.
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

5. Thank You

6. USArray-MT
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)

7. USArray-MT: Typical cross-section
Subduction system
Cratonic stabile zone
Active zone
Meqbel et al. (2013, in review)