People at Fort Hoofddijk

Gijs Straathof
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Mr. G. Straathof
Paleomagnetic Laboratory
Fort Hoofddijk
Utrecht University..
Faculty of Earth Sciences, 
Utrecht University 
Budapestlaan 17
3584 CD Utrecht 
The Netherlands 

Phone +31 30 253 1361
Fax +31 30 243 1677


Research of Gijs Straathof

The Jurassic to Paleogene APWP of Mongolia and closure of the Mongol-Ochotsk ocean
The Orogenic Processes Group of the University of Leicester (UK) has a 10 year experience of field-based research in Mongolia. Present research carried out by Douwe van Hinsbergen focuses on the Mesozoic tectonic history of the area, characterised by extension, and associated basin formation and volcanism.

To obtain further constraints on the timing of the tectonic history, the Apparent Polar Wander Path (APWP) of southern Mongolia from the Jurassic until the Paleogene will be targeted during the 2005 field campaign of 2005.

The first part of this study aims to use and test the field model (TK03.GAD) of Tauxe and Kent (2004), to correct inclination flattening in sediments. The first tests of this model show promising results. The Gobi Altai exposes a number of thick sequences of alternating basalts (without compaction) and sediments (with compaction), enabling unambiguous calibration of TK03.GAD 

The second part of my project aims to use the Jurassic to Paleogene APWP that we will obtain from the Gobi Altai to assess the amount of shortening between Mongolia and Siberia associated with the Mesozoic closure of the Mongol-Ochotsk ocean (Van der Voo et al., 1999; Kravchinksy et al., 2002).

Gijs at Fox's mountain, with Arts Bogd in the back...
  • Kravchinksy, V.A., Cogne, J.-P., Harbert, W.P. and Kuzmin, M.I., 2002. Evolution of the Mongol-Ochotsk Ocean as constrained by new palaeomagnetic data from the Mongol-Ochotsk suture zone, Siberia. Geophysical Journal International, 148, 34-57.
  • Tauxe, L. and Kent, D.V., 2004. A simplified statistical model for the geomagnetic field and the detection of shallow bias in paleomagnetic inclinations: was the ancient magnetic field dipolar? In: J.T.E. Channell et al. (eds), Timescales of the Paleomagnetic Field, Geophysical Monograph Series, 145 (AGU), 328 pp.
  • Van der Voo, R., Spakman, W. and Bijwaard, H., 1999. Mesozoic subducted slabs under Siberia. Nature 397, 246-249.

publications Publications of Gijs Straathof
  • Biggin, A.J., Van Hinsbergen, D.J.J., Langereis, C.G., Straathof, G.B. and Deenen, M.H.L. (2008). Geomagnetic secular variation in the Cretaceous Normal Superchron and in the Jurassic, Phys. Earth Planet. Inter., 169, 3-19    
  • Van Hinsbergen, D.J.J., Straathof, G.B., Kuiper, K.F. Cunningham, W.D. and Wijbrans, J. (2008). No vertical axis rotations during transpressional orogeny in the NE Gobi Altai: coinciding Mongolian and Eurasian early Cretaceous apparent polar wander paths, Geophys. J. Int., 173, 105-126. 



  • Straathof, G.B., van Hinsbergen, D.J.J., Langereis, C.G. and Cunningham, W.D. 2006,  Neogene transpressional mountain building in the Gobi Altai (Mongolia) was not associated with vertical axis rotations: no deviation from the Cretaceous APWP, Eos Transactions AGU 87 (52), Fall Meeting Supplements Abstract T41C-1576 
  • Van Hinsbergen, D.J.J., Straathof, G.B., Langereis, C.G. and Cunningham, W.D. (2006).  Vertical axis clockwise rotations and crustal shortening in a left-lateral strike-slip system: Paleomagnetic analysis of the Gobi Altai Mesozoic-Cenozoic volcanic province ( Mongolia ), Geophysical Research Abstracts, 8, 03726, SRef-ID: 1607-7962/gra/EGU06-A-03726