Complex lithospheric structure under the central Baltic Shield from surface wave tomography.
- Bruneton, M.
- Pedersen, Helle A.
- Farra, Véronique
- Arndt, Nicholas
- Vacher, P.
- Achauer, U.
- Alinaghi, A.
- Ansorge, J.
- Bock, G.
- Friederich, W.
- Grad, M.
- Guterch, A.
- Heikkinen, P.
- Hjelt, S.
- Hyvonen, T.
- Ikonen, J.P.
- Kissling, E.
- Komminaho, K.
- Korja, A.
- Kozlovskaya, E.
- Nevsky, M.
- Paulssen, H.
- Pavlenkova, N.
- Plomerova, J.
- Raita, T.
- Riznichenko, O.Y.
- Roberts, R.
- Sandoval, S.
- Sanina, I.
- Sharov, N.
- Shomali, Z.
- Tiikkainen, J.
- Wielandt, E.
- Wilegalla, K.
- Yliniemi, J.
- Yurov, Y.
DOIAbstract
International audience[1] Regional seismic tomography provides valuable information on the structure of shields, thereby gaining insight to the formation and stabilization of old continents. Fennoscandia (known as the Baltic Shield for its exposed part) is a composite shield for which the last recorded tectonic event is the intrusion of the Rapakivi granitoids around 1.6 Ga. A seismic experiment carried out as part of the European project Svecofennian-Karelia-Lapland-Kola (SVEKALAPKO) was designed to study the upper mantle of the Finnish part of the Baltic Shield, especially the boundary between Archean and Proterozoic domains. We invert the fundamental mode Rayleigh waves to obtain a three-dimensional shear wave velocity model using a ray-...
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