Gijs
Straathof
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Research
of Gijs Straathof
The
Jurassic to Paleogene APWP of Mongolia and closure of the Mongol-Ochotsk
ocean
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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.
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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...
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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.
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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.
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Van der
Voo, R., Spakman, W. and Bijwaard, H., 1999. Mesozoic subducted slabs under
Siberia. Nature 397, 246-249.
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Publications of Gijs Straathof
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2008
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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
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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.
Abstracts
2006
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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
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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
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