RT Journal Article
T1 The Bazar Ophiolite of NW Iberia: a relic of the Iapetus–TornquistOcean in the Variscan suture
A1 Sánchez Martínez, Sonia
A1 Gerdex, Axel
A1 Arenas Martín, Ricardo
A1 Abati Gómez, Jacobo
AB The Bazar Ophiolite, one of the ophiolitic units involved in theVariscan suture of NW Iberia, is mainly formed by metagabbroichigh T amphibolites with N-MORB affinity. The ophioliteappears accreted under an arc-derived upper terrane affectedby intermediate-P granulite facies metamorphism dated at 496–484 Ma. U-Th-Pb geochronology and Lu-Yb-Hf isotope geochemistryof zircons allow recognizing two growth stages. Thefirst occurred during crystallization of the gabbroic protolithand has been dated at 495 ± 2 Ma, whereas the second one,interpreted as dating the high T metamorphism, yielded an ageof 475 ± 2 Ma. The chronology of the Bazar Ophiolite and itsaccretionary history suggest that this unit is a relic of theCambrian ocean located to the North of Gondwana, theIapetus–Tornquist Ocean, accreted to a dissected arc duringor before the early stages in the opening of the Rheic Ocean.
PB Blackwell Publishing Ltd
SN 0954-4879
YR 2012
FD 2012
LK https://hdl.handle.net/20.500.14352/42447
UL https://hdl.handle.net/20.500.14352/42447
LA eng
DS Docta Complutense
RD 27 abr 2024