FAST TRACK PAPER: Upper mantle beneath the Eger Rift (Central Europe): plume or asthenosphere upwelling?

Details FAST TRACK PAPER: Upper mantle beneath the Eger Rift (Central Europe): plume or asthenosphere upwelling? FAST TRACK PAPER: Upper mantle beneath the Eger Rift (Central Europe): plume or asthenosphere upwelling?

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007geoji.169..675p&link_type=abstract

Geophysical Journal International, Volume 169, Issue 2, pp. 675-682.

Astronomy and Astrophysics

Astronomy

14

Eger Rift, Seismic Anisotropy, Tomography

Scientific paper

We present the first results of a high-resolution teleseismic traveltime tomography and seismic anisotropy study of the lithosphere-asthenosphere system beneath the western Bohemian Massif. The initial high-resolution tomography down to a depth of 250 km did not image any columnar low-velocity anomaly which could be interpreted as a mantle plume anticipated beneath the Eger Rift, similar to recent findings of small plumes beneath the French Massif Central and the Eifel in Germany. Alternatively, we interpret the broad low-velocity anomaly beneath the Eger Rift by an upwelling of the lithosphere-asthenosphere transition. We also map lateral variations of seismic anisotropy of the mantle lithosphere from spatial variations of P-wave delay times and the shear wave splitting. Three major domains characterised by different orientations of seismic anisotropy correspond to the major tectonic units-Saxothuringian, Moldanubian and the Teplá-Barrandian-and their fabrics fit to those found in our previous studies of mantle anisotropy on large European scales.

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