Hydrothermal cleft monazite SIMS Th-Pb age data, central Alps


Ion probe (SIMS) Th-Pb age measurements of hydrothermal fissure/cleft monazite from the central Alps. The sample area encompasses most of the Lepontine metamorphic dome, the eastern Rhone-Simplon Line, southern Gotthard Nappe and the Forcola Fault.The ages directly date deformation during part of the exhumation and cooling history of the Lepontine dome and deformation along the Rhone-Simplon fault zone. The ages of all crystals range from ca. 19 to 5 Ma, with age distribution and internal crystal structure facilitating to distinguish between areas whose deformational history was dominated by distinct tectonic events or continuous exhumation.

(1) The measurement of ²⁰⁴Pb is subject to an unresolvable molecular interference by ²³²Th¹⁴³Nd¹⁶O₂, which may result in an overestimation of common Pb concentrations. A correction was applied whenever the ²³²Th¹⁴³Nd¹⁶O₂ signal at mass 203.5 exceeded the average background signal on the ion-counting detector by three times its standard deviation.(2) The f208 value is the percentage of unradiogenic/common lead ²⁰⁸Pb of the measurement's total ²⁰⁸Pb.

Supplement to: Bergemann, Christian A; Gnos, Edwin; Berger, Alfons; Janots, Emilie; Whitehouse, Martin J (2020): Dating tectonic activity in the Lepontine Dome and Rhone-Simplon Fault regions through hydrothermal monazite-(Ce). Solid Earth, 11(1), 199-222

DOI https://doi.org/10.1594/PANGAEA.898689
Related Identifier https://doi.org/10.5194/se-11-199-2020
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.898689
Creator Bergemann, Christian A ORCID logo; Gnos, Edwin ORCID logo; Berger, Alfons ORCID logo; Janots, Emilie; Whitehouse, Martin J (ORCID: 0000-0003-2227-577X)
Publisher PANGAEA
Publication Year 2019
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 8550 data points
Discipline Earth System Research
Spatial Coverage (8.034W, 46.072S, 9.306E, 46.622N)