RT Journal Article
T1 Lithospheric delamination in the core of Pangea: Sm-Nd insightsfrom the Iberian mantle
A1 Gutiérrez Alonso, Gabriel
A1 Brendan Murphy, J.
A1 Fernández Suárez, Javier
A1 Weil, Arlo B.
A1 Piedad Franco, M.
A1 Gonzalo, J. Carlos
AB Delamination of continental lithosphere in the core of active collisional orogens is a wellestablished process; however, evidence for its occurrence in ancient orogenic belts is less obvious. The contrasting Sm-Nd isotopic signature between pre– and post–Middle Permian mantle-derived mafi c rocks from under the Iberian Massif suggests that most, but not all, of the subcontinental lithospheric mantle (SCLM) was replaced in latest Carboniferous to Permian time. Mantle replacement happened during and after the bending of the Variscan orogenic belt into the horseshoe-shaped Iberian-Armorican orocline. Delamination of thickened continental lithosphere in the core of the orocline triggered replacement of the ancient SCLM, thereby providing an explanation for the contrasting Sm-Nd isotopic characteristics of pre– and post–Middle Permian mafic rocks.
PB Geological Society of America
SN 0091-7613, ESSN: 1943-2682
YR 2011
FD 2011
LK https://hdl.handle.net/20.500.14352/43356
UL https://hdl.handle.net/20.500.14352/43356
LA eng
NO ODRE II
NO Spanish Ministry of Science and Innovation
NO Mobility Program
NO International Geological Correlation (IGCP)
DS Docta Complutense
RD 8 abr 2025