%0 Journal Article
%A Osete López, María Luisa
%A Gialanella, P.R.
%A Gómez Fernández, Juan José
%A Villalaín Santamaría, Juan José
%A Goy Goy, Antonio
%A Heller, Friedrich
%T Magnetostratigraphy of Early–Middle Toarcian expanded sections from the Iberian Range (central Spain)
%D 2007
%@ 0012-821X
%U https://hdl.handle.net/20.500.14352/103587
%X The magnetostratigraphy of the Lower–Middle Toarcian has been established in two well-dated stratigraphically expanded sections: the Sierra Palomera and the Ariño sections, located in the Iberian Range, in central-eastern Spain. Two magnetisation components could be isolated by thermal cleaning: a secondary syntectonic component of always normal polarity unblocking at intermediate temperatures up to 450 °C/475 °C (A component) and a high temperature unblocking component up to 575 °C (B component). The B component passes fold and reversal tests and is considered the characteristic remanent magnetisation of primary origin. The first Toarcian palaeomagnetic pole for Iberia has been obtained: Plat = 77.4°, Plon = 241.3°E (dm = 5.4° dp = 6.0°).Five pairs of normal and reversed polarity zones were calibrated to regional ammonite subzones. The pattern can be calibrated to other Toarcian magnetostratigraphic studies, but provides a more detailed biostratigraphic framework. A refined magnetic polarity time scale is proposed for the Lower–Middle Toarcian.
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