An Alternative Protocol for Single Zircon Dissolution with Application to (U-Th-Sm)/He Thermochronometry

Abstract : Zircon (U‐Th‐Sm)/He (ZHe) thermochronometry is a powerful tool that has been widely used in geology to constrain the exhumation histories of orogens. In this study, we present an alternative protocol for dissolving zircon grains for determination of parent nuclides. This new alkali fusion procedure developed at the SARM (Service d'Analyse des Roches et des Minéraux) in Nancy, France, is fast (requiring only 2 d, including cleaning steps) and offers several advantages over conventional methods by avoiding: (i) use of HF pressure dissolution and (ii) complete removing of grains from the metal microvials. After dissolution, U, Th and Sm were measured using an ICP‐MS. We tested the new procedure on two different ZHe reference materials, the Fish Canyon Tuff and Buluk Tuff; these provided precision values for ZHe‐age estimations of 9 and 6% (1s), respectively. In addition, using this method, zircons from the Buluk Tuff are shown to be chemically more homogenous and more suitable for assessing the uncertainty of the entire integrated procedure.
Document type :
Journal articles
Complete list of metadatas

https://hal.univ-lorraine.fr/hal-01771691
Contributor : Crpg Ul <>
Submitted on : Thursday, April 19, 2018 - 4:51:34 PM
Last modification on : Thursday, October 31, 2019 - 4:08:12 PM

Identifiers

Citation

Bouchaib Tibari, Arnaud Vacherat, Martin Stab, Raphaël Pik, Delphine Yeghicheyan, et al.. An Alternative Protocol for Single Zircon Dissolution with Application to (U-Th-Sm)/He Thermochronometry. Geostandards and Geoanalytical Research, Wiley, 2016, 40 (3), pp.365 - 375. ⟨10.1111/j.1751-908X.2016.00375.x⟩. ⟨hal-01771691⟩

Share

Metrics

Record views

93