Timescales of spherulite crystallization in obsidian inferred from water concentration profiles

• Published in: American Mineralogist
• Main Authors: Castro, J. M., Beck, Pierre, Tuffen, H., Nichols, Alexander R.L., Dingwell, Donald B., Martin, Michael C.
• Other Authors: Department of Mineral Sciences Washington, Smithsonian Institution, Laboratoire de Planétologie de Grenoble (LPG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Department of Environmental Science Lancaster, Lancaster University, Institute for Research on Earth Evolution Yokosuka (IFREE), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Department of Earth and Environmental Sciences Munich, Ludwig Maximilian University Munich = Ludwig Maximilians Universität München (LMU), Advanced Light Source LBNL Berkeley (ALS), Lawrence Berkeley National Laboratory Berkeley (LBNL)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2008
• Subjects: Spherulite • diffusion • obsidian • crystallization; Krafla; Iceland
• Online Access: https://insu.hal.science/insu-00363340; https://doi.org/10.2138/am.2008.2904

International audience We determined the kinetics of spherulite growth in obsidians from Krafla volcano, Iceland. We measured water concentration profiles around spherulites in obsidian by synchrotron Fourier transform infrared spectroscopy. The distribution of OH– groups surrounding spherulites dec...