1-1-1-1-1-1-1-1-1-1-1-1-1-1 From: Linda Sobolewski <linda.sobolewski@xxxxxxxxxxxxxxxxxx> *A seminar series on diffusion modelling to determine timescales of processes (Diffusion Chronometry)* Dear Colleagues, Our next seminar will be held on *Thursday, 25 May, 2023* (16:30-18:30 CEST) with *Jamshid Moshrefzadeh, University of Alaska Fairbanks / Alaska Volcano Observatory, USA* â??Diffusion and Growth Rate Chronometry Provide Constraints on Timescales of Magmatic Processes at Bogoslof Volcano, Alaskaâ?? and *Emma Burkett, University of New Hampshire, USA* â??MSURFED: Magmatic Speedometry Using R-coded Fitted Elemental Diffusion Modeling, Insights into the Dynamics of Transcrustal Magmatic Systemsâ?? ******************************************************************************************************************************************** *Summary: Diffusion and Growth Rate Chronometry Provide Constraints on Timescales of Magmatic Processes at Bogoslof Volcano, Alaska* *We investigate the rates of magmatic processes using clinopyroxene diffusion chronometry on volcanic products erupted in August 2017 at the end of the 9-month eruption of Bogoslof volcano. The eruptive products contain crystals which exhibit distinct chemical and/or textural boundaries and are occasionally observed in multi-phase crystal clots with shared zoning histories, indicating that the distinct rims of all mineral phases formed contemporaneously. We perform clinopyroxene diffusion chronometry to calculate plagioclase growth rates and determine timescales of magmatic processes.* *Summary: MSURFED: Magmatic Speedometry Using R-coded Fitted Elemental Diffusion Modeling, Insights into the Dynamics of Transcrustal Magmatic Systems* *Diffusion chronometry modeling can provide insights into timelines of magma formation, potentially down to timescales of days. Current user-friendly programs, however, have limitations, including restrictions to certain minerals, processing platforms or potentially overly prescribed temperature conditions. To enhance wider-scale applicability of this the diffusion chronometry approach, we developed the MSURFED model, which allows users to input a range of parameters and provides a more realistic yet still quantitative approach to fitting diffusion chronometry timescales for studying magma assembly.* ******************************************************************************************************************************************** Registration is required to avoid undesired interruptions. Please register here <https://urldefense.com/v3/__https://ruhr-uni-bochum.zoom.us/meeting/register/u5cod-ChqjwpG9SrxFz-Qheldnv-usfoNnAi__;!!IKRxdwAv5BmarQ!auJiiNu5ukYEUMsO8hyxR0O7EYOPDwz2e_YiPsvgWe598emYGjcr0LfODFOMJgxyjJwZFzSn5m6sRMixsXRoFx60kFlCCv2_g9Lo$> in advance for this meeting - all registrants will receive a link to the seminar that is valid for that person only. *A seperate registration is required for every seminar*. A recording of each seminar is available on our website via the following link <https://urldefense.com/v3/__https://diffchron.ruhr-uni-bochum.de/seminars/__;!!IKRxdwAv5BmarQ!auJiiNu5ukYEUMsO8hyxR0O7EYOPDwz2e_YiPsvgWe598emYGjcr0LfODFOMJgxyjJwZFzSn5m6sRMixsXRoFx60kFlCCk8mbCEX$> . 1-1-1-1-1-1-1-1-1-1-1-1-1-1 ------------------------------
