RT Journal Article
T1 Arc sections correlation along the Gondwana margin: Dynamic shifts tracked by detrital zircon
A1 Rojo Pérez, Esther
A1 Fernández Suárez, Javier
A1 Fuenlabrada Pérez, José Manuel
A1 Albert, Richard
A1 Díez Fernández, Rubén
A1 Sánchez Martínez, Sonia
A1 Novo Fernández, Irene
A1 Moreno Martín, Diana
A1 Gerdes, Axel
A1 Arenas Martín, Ricardo
AB Sections of the Gondwana margin recording the evolution of Ediacaran and Cambrian arc systems are preserved along the Variscan Orogen. The sedimentary sequences deposited in it and associated with its activity can provide significant keys to understanding the dynamics of the margin. In this sense, sections of the Gondwana margin that include arc magmatism between c. 602 and 500 Ma are well preserved in the SW and NW Iberian Massif. However, the activity in these areas was not synchronous, and the potential connection between both sectors along the Gondwana margin and its meaning is still poorly understood. U-Pb geochronology performed on detrital zircon grains of the Ediacaran Serie Negra Group (SW Iberia) show a maximum depositional age between 619 and 559 Ma for its Montemolín and Tentudía formations, respectively. The obtained Hf data from the same zircon grains supports significant crustal input. Meanwhile, U-Pb performed on detrital zircon grains of the Cambrian Betanzos Unit (NW Iberia) exhibit essentially mantle-derived Hf signature at 544–537 Ma (Maximum Depositional Age). Based on these data, a dynamic model for the Gondwana margin at c. 500 Ma has been proposed, comparable to the current processes operating on the Pacific edge of the North American plate. This model highlights a spatial and temporal connection between the Gondwana margin’s peripheral sections (SW and NW Iberia).
PB Elsevier
SN 1342-937X
YR 2025
FD 2025-03
LK https://hdl.handle.net/20.500.14352/115639
UL https://hdl.handle.net/20.500.14352/115639
LA eng
NO Rojo-Pérez, E., Fernández-Suárez, J., Fuenlabrada, J. M., Albert, R., Díez Fernández, R., Sánchez Martínez, S., Novo-Fernández, I., Moreno-Martín, D., Gerdes, A., & Arenas, R. (2025). Arc sections correlation along the Gondwana margin: Dynamic shifts tracked by detrital zircon. Gondwana Research, 139, 272-283
NO Ministerio de Economía, Industria y Competitividad
DS Docta Complutense
RD 17 abr 2025