RT Journal Article
T1 Does the Ollo de Sapo magmatic event support Furongian‒Tremadocian mantle plume activity fringing NW Gondwana?
A1 Casas Tuset, Josep María
A1 Murphy, J. Brendan
A1 Díez Montes, Alejandro
A1 Sánchez García, Teresa
A1 Poulpiquet, Jacques de
A1 Álvaro, J.J.
A1 Guimerà Rosso, Joan
AB We propose that the 495-470 Ma Ollo de Sapo magmatism in the Iberian Massif was the result of a mantle plume event in the Furongian-Early Ordovician. This plume was located beneath the northwestern margin of Gondwana and caused rapid and extensive melting of Ediacaran arc-related crustal rocks and their derived sediments. Mafic magmas due to plume partial melting underplated the crust and were emplaced at mid-lower crustal levels (~15km), and provided the heat for crustal melting. Manifestations of the plume include (i) pronounced magnetic anomalies in the region which match the distribution of Ollo de Sapo rocks, (ii) the Toledanian unconformity (and gap), which is attributed to thermal doming, and (iii) the significant thickness variations in Lower to Middle Ordovician sedimentary successions in adjacent areas. In a more regional context, we infer that the plume was one of a cluster of plumes impacting the Gondwana periphery and that it contributed to the birth and development of the Rheic Ocean throughout Gondwana margin breakup.
PB Taylor and Francis
SN 0020-6814
YR 2023
FD 2023-09-28
LK https://hdl.handle.net/20.500.14352/103348
UL https://hdl.handle.net/20.500.14352/103348
LA eng
NO Ministerio de Ciencia, Innovación y Universidades/Agencia Estatal de Investigación/Fondo Europeo de Desarrollo Regional (FEDER)
NO NSERC, Canada
DS Docta Complutense
RD 17 abr 2025