People at Fort Hoofddijk

Maud Meijers
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Poincaré Postdoctoral Fellow
Dr. M.J.M. Meijers
GéoAzur, UMR 6526
Université de Nice Sophia Antipolis
Parc Valrose 
06108 Nice cedex 2, France

Phone: +33 4 92 07 68 00


My PhD thesis

Research of Maud Meijers
Paleomagnetism of the Armenian Block and its foreland: constraints on Tethyan plate reconstructions
and oroclinal bending during the Phanerozoic

The South Armenian Block (SAB) rifted away from the African margin in early to middle Jurassic times, ~200-160 million years ago (see figure below). It collided with the Eurasian margin in the late Cretaceous (~83-70 Ma), where it is still positioned.

The ages of rifting and collision are mainly based on geological evidence and a single paleomagnetic study, which is unsatisfactory for plate reconstructions. The position of the SAB is not yet determined with respect to the African and Eurasian margins that were separated by a 3300 km wide ocean in the ~80-40 Myr following rifting, according to recent APWP paths. The suggested - but widely ranging - ages of rifting and collision of the SAB as well as its unknown position in the intervening time span are not suitable to develop a robust paleogeographic reconstruction. 

Paleogeographic reconstruction modified after Dercourt et al. (2000) during Early Kimmeridgian time. 
Paleomagnetic research, based on 
magnetic particles in rocks that align
with the Earth’s dipolar magnetic field
at the time of deposition, is the only 
way to quantitatively provide paleo- latitudes, and should therefore be 
conducted in the region of the SAB
to enable the paleogeographic reconstructions of the Tethys ocean.

The collision of the SAB with Eurasia in
late Cretaceous times occurs much earlier than the accommodation of shortening in the Kura fold-and-thrust belt that results from collision of Arabia, which is very recent: only during the last 5 Myr, according to Forte et al. (2010). 

Both collision mechanisms however, could explain the arc-shaped geometry north of the SAB. 

I want that piece of rock !
Maud drilling (again ...)
Using paleomagnetic data, which provide not only paleolatitudes but also information on tectonic rotations, we aim to exactly pinpoint the timing of formation of this arc-shaped geometry, and from this information we aim to derive the responsible mechanism.

Little and Big Mount Ararat

In the autumn of 2009, we started with a first paleomagnetic fieldwork, aided by financial support from the Darius consortium. Preliminary measurements provide already some promising results. Fieldwork will be continued in 2010. 

 Fieldwork in the Sout Armenian Block

publications Publications of Maud Meijers
  • Meijers, M.J.M , Van Hinsbergen, D.J.J., Langereis, C.G., Altiner, D., Dekkers, M.J., Kaymakci, N. and Stephenson, R.A. (2010). Pervasive Paleogene remagnetization of the central Taurides fold-and-thrust belt (southern Turkey) and implications for rotations in the Isparta Angle, Geophys. J. Int., 184, 1090-1112   
  • Dupont-Nivet, G., Lippert, P., van Hinsbergen, D.J.J., Meijers, M.J.M. and Kapp, P. (2010). Paleolatitude and age of the Indo-Asia collision, Geophys. J,. Int., 182, 1189-1198. 
  • Meijers, M.J.M. (2010). Tethyan evolution of the Black Sea region since the Paleozoic: a paleomagnetic approach (PhD thesis Utrecht University), Geologica Ultraiectina, 319 
  • Meijers, M.J.M., Hamers, M.F., Van Hinsbergen, D.J.J., Van der Meer, D.G., Kitchka, A., Langereis, C.G. and Stephenson, R.A. (2010). New late Paleozoic paleopoles from the Donbas Foldbelt (Ukraine): implications for the Pangea A vs. B controversy, Earth and  Planetary Science Letters, 297, 18-33. 
  • Meijers, M.J.M., Kaymakci, N., Van Hinsbergen, D.J.J., Langereis, C.G., Stephenson, R.A. and Hippolyte, J.-C.  (2010). Late Cretaceous to Paleocene oroclinal bending in the Central Pontides (Turkey), Tectonics, 29, TC4016, doi:10.1029/2009TC002620. 
  • Meijers, M.J.M., Langereis, C.G., Van Hinsbergen, D.J.J., Kaymakci, N., Stephenson, R.A. and  Altiner, D. (2010). Jurassic-Cretaceous low paleolatitudes from the circum-Black Sea region (Crimea and Pontides) due to True Polar Wander, Earth and  Planetary Science Letters, 296, 210-226. 
  • Meijers, M.J.M , Vrouwe, B., Van Hinsbergen, D.J.J., Kuiper, K.F., Wijbrans, J. , Davies, G.R., Stephenson, R.A., Kaymakci, N., Matenco, L. and Saintot, A. (2010). Jurassic arc volcanism on Crimea (Ukraine): implications for the paleo-subduction zone configuration of the Black Sea region, Lithos, 119, 412-426. 
  • Meijers, M. J. M. 2005. Palaeomagnetic data from Crimea (Ukraine): New constraints for Mesozoic plate tectonic reconstructions of the southern margin of  the East European Platform (revised 2008). Cambridge, CASP Reports, Black Sea Project (Phase II): 48