TIEN SHAN - PAMIR GEODYNAMIC PROGRAM / MT

TIPAGE / MT

The Tien Shan - Pamir Geodynamic Program (TIPAGE) aims to investigate key questions of active intra-continental orogeny. It combines multiple methods like numerical geodynamic modeling, structural geology, geo-thermochronology and petrology with passive source geophysical experiments, i.e. a seismic and a magnetotelluric survey. The magnetotelluric (MT) component addresses topics such as middle crustal flow, stress relaxation due to partial melting and fluid release in continental subduction processes.

MT data were recorded in two field campaigns 2008 and 2009 along a 350 km long corridor from the Afghan border in SE-Tajikistan across the Pamir Plateau, the Alai Valley and western Tien Shan ranges to Osh in southern Kyrgyzstan. In total there are 178 MT stations with an averaged station spacing of 2 km. At most of the stations a broad period range of 6 decades (10-3 s - 103 s) was recorded with a recording time of 3 to 4 days. 26 stations combine broad band and long period (up to 104 s) measurements. The MT data were collected in close cooperation with the Research Station of the Russian Academy of Sciences (RAS), Bishkek, Kyrgyzstan.

Topographic map of Pamir and western Tien Shan with political borders and the location of main geological structures.
Topographic map of Pamir and western Tien Shan with political borders (black lines) and the location of main geological structures (blue lines). Red and yellow dots indicate the location of broad band and long period MT sites, respectively.

Principal Investigator

  • PD Dr. Oliver Ritter (GFZ)

Research scientist

  • Paul Sass (GFZ)

Cooperation  Partners  

  • Dr. Anatoly Rybin, Dr. Vlad Batalev, Vitalii Matiukov (RAS Bishkek, Research Station of the Russian Academy of Sciences RAS, Bishkek, Kyrgyzstan)
  • Dr. Vladislav Minaev, Dr. Ilhomjon Oimahmadov (Institute of Geology, Tajik Academy of Sciences, Dushanbe, Tajikistan)
  • Prof. Dr. Lothar  Ratschbacher, Prof. Dr. Richard Gloaguen (TU Bergakademie Freiberg)
  • Prof. Dr. Jonas Kley (Universität Jena)
  • Dr. Bernd Schurr (section 3.1), Dr. Xiaohui Yuan (section 2.4), Dr. James Mechie (section 2.2),  Dr. Stephan Sobolev, Dr. Andrey Babeyko (section 2.5) (GFZ)

Project duration

  • 2008 – present

Field work  

  • 08/2008 - 09/2008
  • 07/2009 - 08/2009

Additional information

Methods & Equipment   

  • SPAM MkIII real-time instruments for short period measurements (10-3 s – 10-1 s)
  • EDL data logger with CASTLE sensor boxes for broad band and long period measurements (10-2 s - 104 s)
  • Induction coils (Metronix) 
  • Fluxgate magnetometers (Geomagnet)
  • Non-polarisable Ag-AgCl electrodes (GFZ)

Publications   

  • Sass, P., Ritter, O., Rybin, A., Batalev, V., 2012. 2D and 3D inversion of MT data from the continental collision zone in the Pamir and Tien Shan, Central Asia. Proceedings of the 24th Schmucker-Weidelt-Colloquium for Electromagnetic Depth Research, 213–224.
  • Sass, P., Ritter, O., Rybin, A., Muñoz, G., Batalev, V., Gil, M., 2009. Magnetotelluric data from the Tien Shan and Pamir continental collision zones, Central Asia. Proceedings of the 23rd Schmucker-Weidelt-Colloquium for Electromagnetic Depth Research, 263–268.

Acknowledgements  

  • Funding by the German Science Foundation (RI 1127/8)
  • Funding for the experiments by the GFZ
  • All magnetotelluric instruments were provided by the magnetotelluric component of the geophysical instrument pool (GIPP-MT)

Project details

Contact

Funding

DFG - German Research Foundation
GFZ - Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences

Status

Current