Ascent rate of the Udachnaya-East kimberlite melts from olivine diffusion chronometry

Modelling ancient magma plumbing systems through clinopyroxene populations: a case study from Middle Triassic volcanics (Dolomites, Italy)

“…Crystal zoning is preserved when the diffusion rate of the chemical components is slower than the pre-eruptive storage time (Costa et al 2008;Kahl et al 2011;Dohmen et al 2017). These dynamics could be recorded by all the principal magmatic rock-forming minerals like olivine (Girona and Costa 2013;Kahl et al 2013;Pontesilli et al 2021;Casetta et al 2023), clinopyroxene (Morgan et al 2004;Petrone et al 2018;Nardini et al 2022), orthopyroxene (Saunders et al 2012;Mangler et al 2020), plagioclase (Ginibre et al 2002;Druitt et al 2012;Neave et al 2013;Moschini et al 2023), amphibole (Humphreys et al 2006), sanidine (Ginibre et al 2004;Morgan et al 2006), quartz (Chamberlain et al 2014) and zircon (Griffin et al 2002). Clinopyroxene is commonly used for tracing the chemical and physical history of plumbing systems and the timescales of magmatic processes, owing to its extended stability field over variable pressure, temperature and melt water contents (H 2 O) (Putirka 2008;Masotta et al 2020), its sensitivity to the crystallization conditions (Putirka et al 1996) and the sluggish diffusion rate of some crucial elements such as Cr, Al, Ti and Fe-Mg (Dimanov and Sautter 2000;Cherniak and Dimanov 2010;Müller et al 2013;Ni et al 2014;Dohmen et al 2017).…”