2-2-2-2-2-2-2-2-2-2-2-2-2 From: Linda Sobolewski <linda.sobolewski@xxxxxxxxxxxxxxxxxx> Dear Colleagues, Our next seminar series will be held on Thursday, September 23 (16:30-18:30 CEST) with *Hannah Shamloo, Oregon State University, USA: â??Rethinking How We Determine Magmatic Timescales: Multi-mode Mg Diffusion in Sanidine and Implications for the Timing of Eruption Initiationâ??* *Summary:** Mineral zoning and the diffusion of elements across these zones has been widely used to determine the timescales of magmatic processes. Recent experimental work reveals that diffusion in feldspar, a ubiquitous phase in magmatic systems, is more complex than previously understood, reshaping the way we use chronometers to determine meaningful timescales. In this talk I will present a new experimentally derived diffusion chronometer, and apply it to the Lava Creek Tuff supereruption at Yellowstone in order to determine the timing of eruption initiation.* and *Youxue Zhang, University of Michigan, USA: â??Multicomponent and isotope diffusion in silicate meltsâ??* *Summary:** All diffusion in natural melts is complicated multicomponent diffusion. I will present our effort to obtain reliable 6 by 6 diffusion matrix in a 7-component haplobasalt, and 7 by 7 diffusion matrix in an 8-component basalt similar to MORB. It is possible now to roughly predict multicomponent diffusion in basalts. In addition, diffusion of potassium isotopes during multicomponent diffusion will also be discussed.* Registration is required to avoid undesired interruptions. Please register by clicking the following link: https://urldefense.com/v3/__https://ruhr-uni-bochum.zoom.us/meeting/register/u5wkce6qrD0vGN2SCmOrd-ASaiAKJcYnLz-c__;!!IKRxdwAv5BmarQ!Lp2oWj-DWmS2rSwEbiiC_8DE9Vzk-dayrEZ7-6-vN-Ydi3Ty-YpxLoxUnEqwvO0$ <https://urldefense.com/v3/__https://ruhr-uni-bochum.zoom.us/meeting/register/u5wkce6qrD0vGN2SCmOrd-ASaiAKJcYnLz-c__;!!IKRxdwAv5BmarQ!LTlh5uYf5sEheQc4rS4F4hBWfuM4QYnD2_S6_oxGrHlrJJnHbN5imrPjW4hv0mg$> - all registrants will receive a link to the seminar that is valid for that person only. A recording of each seminar series is available via the following link: https://urldefense.com/v3/__https://diffchron.ruhr-uni-bochum.de/seminars/__;!!IKRxdwAv5BmarQ!Lp2oWj-DWmS2rSwEbiiC_8DE9Vzk-dayrEZ7-6-vN-Ydi3Ty-YpxLoxUgXXqmD0$ <https://urldefense.com/v3/__https://diffchron.ruhr-uni-bochum.de/seminars/__;!!IKRxdwAv5BmarQ!LTlh5uYf5sEheQc4rS4F4hBWfuM4QYnD2_S6_oxGrHlrJJnHbN5imrPj4m1cUvI$> 2-2-2-2-2-2-2-2-2-2-2-2-2 ------------------------------
