U-Pb ages of detrital zircons from the Nevado-Filabride Complex (Betic Chain)

Published: 29 August 2018| Version 1 | DOI: 10.17632/gcgkv6wdf6.1
Contributors:
ANTONIO JABALOY,
Cristina Talavera,
Gomez-Pugnaire María Teresa,
VICENTE LÓPEZ SÁNCHEZ-VIZCAÍNO,
MERCEDES VÁZQUEZ-VÍLCHEZ,
Martín Jesús Rodríguez-Peces,
NOREEN J. EVANS

Description

This dataset include detrital zircon U-Pb zircon age distributions in Paleozoic rocks rocks from the Nevado-Filábride Complex (Betic Cordillera, SE Spain) to test if they from part of the South Iberian paleomargin, or if they are related to the Alpine Allochtonous Internal terranes. The data set show ages in the text, tables, and figures. The ages are quoted as 206Pb/238U dates for zircons younger than 1500 Ma and as 207Pb/206Pb dates for zircons older than 1500 Ma. Figures include the U–Pb concordia and the youngest zircon population plots for the studied samples. Zircons were separated using standard heavy-liquid and magnetic techniques in the Department of Geodynamics of the University of Granada. Zircons grains from the Aulago Fm were hand-picked from the studied samples, several grains of zircon reference standard TEMORA-II (for isotope ratios; Black et al., 2003), one grain of reference standard SL13 zircon (for U concentration, Claoué-Long et al., 1995), plus a few grains of REG zircon (high common lead, for mass calibration) were mounted in a 3.5 cm diameter epoxy mount, polished and examined using optical (reflected and transmitted light) and scanning electron microscopy methods (secondary electrons (SE) and cathodoluminescence (CL)). After extensive cleaning, mounts were coated with ultra-pure gold (8-10 nm) and loaded for SHRIMP analysis. Their U-Th-Pb geochronological analyses were carried out on the SHRIMP IIe/mc instrument of the IBERSIMS lab, University of Granada. Grains from the Tahal Fm were handpicked and mounted in epoxy, polished, cleaned and gold coated for cathodoluminescence (CL) imaging on a Mira3 FESEM instrument at the John de Laeter Centre (JdLC), Curtin University, Perth, Australia. LA-ICP-MS data collection was performed at the GeoHistory Facility, JdLC, Curtin University, Perth, Australia.

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