Ask for a reprint
email :
* Give your email
2023
ACL
|
Danilo Di Genova, Dmitry Bondar, Alessio Zandonà, Pedro Valdivia, Raschid Al-Mukadam, Hongzhan Fei, Anthony C.Withers, Tiziana Boffa Ballaran, Alexander Kurnosov, Catherine McCammon, Joachim Deubener, Tomoo Katsura, 'Viscosity of anhydrous and hydrous peridotite melts', Chem. Geol. 625 121440 (2023) doi:10.1016/j.chemgeo.2023.121440
The melt viscosity (η) of anhydrous and hydrous peridotite was investigated using a multipronged approach combining micropenetration viscometry, conventional DSC, flash DSC and Brillouin spectroscopy. Raman spectroscopy measurements were used to verify the absence of crystallization and/or degassing during high-temperature measurements of these extremely reactive glasses and melts, ensuring that the data corresponded to the crystal-free melt viscosity. Based on the experimental data, an accurate description of the viscosity of peridotite melts over thirteen orders of magnitude (from Tg to η ≈ 10−1 Pa s) is provided in a broad range of compositions and oxidation states. Since empirical models predict viscosities that can significantly deviate from measured data to varying degrees, a new model was developed for the temperature- and H2O-dependent viscosity of peridotite melts (up to 12 mol% H2O content).
|
|
|