TY - DATA T1 - U–Pb detrital zircon ages in synorogenic deposits of the NW Iberian Massif (Variscan belt): interplay of Devonian–Carboniferous sedimentation and thrust tectonics PY - 2016/06/21 AU - JOSé R. MARTíNEZ CATALáN AU - JAVIER FERNáNDEZ-SUáREZ AU - CARLOS MEIRELES AU - EMILIO GONZáLEZ CLAVIJO AU - ELENA BELOUSOVA AU - AYESHA SAEED UR - https://geolsoc.figshare.com/articles/journal_contribution/U_Pb_detrital_zircon_ages_in_synorogenic_deposits_of_the_NW_Iberian_Massif_Variscan_belt_interplay_of_Devonian_Carboniferous___sedimentation_and_thrust_tectonics/3454517 DO - 10.6084/m9.figshare.3454517.v1 L4 - https://ndownloader.figshare.com/files/5426210 KW - Variscan zircon population ages KW - Iberian autochthon KW - thrust tectonics Detrital zircons KW - Palaeozoic zircon age population KW - NW Iberian Massif KW - plasma mass spectrometry KW - Carboniferous synorogenic flysch deposits KW - San Vitero Formation KW - Variscan detrital zircons KW - Devonian KW - zircon age populations KW - Geology N2 - Detrital zircons from Devonian and Carboniferous synorogenic flysch deposits occurring in an imbricate stack have been dated by laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS) to: (1) obtain a maximum depositional age to constrain the maximum age limit for thrusting of exotic terranes in the NW Iberian Massif; (2) correlate the zircon age populations with published ages in nearby units to establish their possible source areas. The maximum depositional ages are Late Devonian for rocks high in the structural nappe pile (Gimonde Formation), in accordance with palynomorph dating, and around the Devonian–Carboniferous boundary for structurally lower samples (San Vitero Formation). Used in conjunction with previously published ages, the new ages are interpreted in terms of the advance of the thrust system responsible for the emplacement of exotic terranes upon the Iberian autochthon during the Variscan collision. Early Variscan zircon population ages indicate the exotic terranes as the source of synorogenic sediments, whereas their scarcity suggests derivation from the Iberian autochthon. One of the samples analysed lacks Variscan detrital zircons; this feature, together with the absence of an Early Palaeozoic zircon age population, puts into question its synorogenic character and suggests that the sample may be representative of the preorogenic parautochthon. ER -