LA-ICP-MS and SIMS U-Pb and U-Th zircon geochronological data of Late Pleistocene lava domes of the Ciomadul Volcanic Dome Complex (Eastern Carpathians)

Réka Lukács; Marcel Guillong; Axel K Schmitt; Kata Molnár; Olivier Bachmann; Szabolcs Harangi

doi:10.1016/j.dib.2018.03.100

LA-ICP-MS and SIMS U-Pb and U-Th zircon geochronological data of Late Pleistocene lava domes of the Ciomadul Volcanic Dome Complex (Eastern Carpathians)

Data Brief. 2018 Mar 27:18:808-813. doi: 10.1016/j.dib.2018.03.100. eCollection 2018 Jun.

Authors

Réka Lukács¹, Marcel Guillong², Axel K Schmitt³, Kata Molnár⁴, Olivier Bachmann², Szabolcs Harangi^{1

4}

Affiliations

¹ MTA-ELTE Volcanology Research Group, 1117, Budapest Pázmány Péter sétány 1/C, Budapest, Hungary.
² Institute of Geochemistry and Petrology, Department of Earth Sciences, ETH Zürich, Clausiusstrasse 25, 8092 Zürich, Switzerland.
³ Institute of Earth Sciences, Ruprecht-Karls University, Heidelberg, Germany.
⁴ Department of Petrology and Geochemistry, Eötvös Loránd University, 1117, Budapest Pázmány Péter sétány 1/C, Budapest, Hungary.

Abstract

This article provides laser-ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) and secondary ionization mass spectrometry (SIMS) U-Pb and U-Th zircon dates for crystals separated from Late Pleistocene dacitic lava dome rocks of the Ciomadul Volcanic Dome Complex (Eastern Carpathians, Romania). The analyses were performed on unpolished zircon prism faces (termed rim analyses) and on crystal interiors exposed through mechanical grinding an polishing (interior analyses). ²⁰⁶Pb/²³⁸U ages are corrected for Th-disequilibrium based on published and calculated distribution coefficients for U and Th using average whole-rock and individually analyzed zircon compositions. The data presented in this article were used for the Th-disequilibrium correction of (U-Th)/He zircon geochronology data in the research article entitled "The onset of the volcanism in the Ciomadul Volcanic Dome Complex (Eastern Carpathians): eruption chronology and magma type variation" (Molnár et al., 2018) [1].