Articles | Volume 6, issue 4
https://doi.org/10.5194/gchron-6-585-2024
https://doi.org/10.5194/gchron-6-585-2024
Research article
 | 
13 Nov 2024
Research article |  | 13 Nov 2024

In situ rubidium–strontium geochronology of white mica in young metamafic and metasomatic rocks from Syros: testing the limits of laser-ablation triple-quadrupole inductively coupled plasma mass spectrometer mica dating using different anchoring approaches

Jesús Muñoz-Montecinos, Andrea Giuliani, Senan Oesch, Silvia Volante, Bradley Peters, and Whitney Behr

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Cited articles

Agard, P., Plunder, A., Angiboust, S., Bonnet, G., and Ruh, J.: The subduction plate interface: Rock record and mechanical coupling (from long to short timescales), Lithos, 320, 537–566, 2018. 
Angiboust, S. and Glodny, J.: Exhumation of eclogitic ophiolitic nappes in the W. Alps: New age data and implications for crustal wedge dynamics, Lithos, 356, 105374, https://doi.org/10.1016/j.lithos.2020.105374, 2020. 
Angiboust, S., Wolf, S., Burov, E., Agard, P., and Yamato, P.: Effect of fluid circulation on subduction interface tectonic processes: Insights from thermo-mechanical numerical modelling, Earth Planet. Sc. Lett., 357, 238–248, 2012. 
Angiboust, S., Pettke, T., De Hoog, J. C., Caron, B., and Oncken, O.: Channelized fluid flow and eclogite-facies metasomatism along the subduction shear zone, J. Petrol., 55, 883–916, 2014. 
Angiboust, S., Cambeses, A., Hyppolito, T., Glodny, J., Monié, P., Calderón, M., and Juliani, C.: A 100-my-long window onto mass-flow processes in the Patagonian Mesozoic subduction zone (Diego de Almagro Island, Chile), Bulletin, 130, 1439–1456, 2018. 
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Short summary
Dating the roots of plate boundaries is essential for understanding geologic processes, but geochemical limitations, particularly in young mafic rocks, make this challenging. Advancements in mass spectrometry now enable high-resolution analysis of micro-domains. We assess these limitations by dating rocks from Syros. Multi-phase mineral analysis improves age uncertainty 6-fold. We emphasize the importance of the local geologic context and propose strategies to mitigate uncertainties.
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