RT Journal Article
T1 Magnetostratigraphy of Early–Middle Toarcian expanded sections from the Iberian Range (central Spain)
A1 Osete López, María Luisa
A1 Gialanella, P.R.
A1 Gómez Fernández, Juan José
A1 Villalaín Santamaría, Juan José
A1 Goy Goy, Antonio
A1 Heller, Friedrich
AB 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.
PB Elsevier
SN 0012-821X
YR 2007
FD 2007
LK https://hdl.handle.net/20.500.14352/103587
UL https://hdl.handle.net/20.500.14352/103587
LA eng
NO Ministerio de Educación y Ciencia
DS Docta Complutense
RD 7 jun 2025