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, January 27* (16:30-18:30 *CET*) with *Corliss Kin I Sio,* *University of Toronto, Canada:* *â??Crystal growth or chemical diffusion? A stable isotope diagnosis.â??* and *William Nelson,* *University of HawaiÊ»i at MÄ?noa, USA:* *â??Diffusion Chronometry reveals rapid early cooling in Apollo sample 76535â??* ******************************************************************************************************************************************* *Summary:* *â??Crystal growth or chemical diffusion? A stable isotope diagnosis.â??* *Chemical diffusion induces large isotope fractionations that can be predicted using laboratory diffusion experiments. This talk will illustrate the utility of stable isotopes in determining the contributions of crystal growth vs diffusion in generating mineral zoning. The ability to tease these two processes apart results in diffusion models that are more reliable compared to those that use chemical analyses alone.* *â??Diffusion Chronometry reveals rapid early cooling in Apollo sample 76535â??* *The Mg-suite can provide unique constraints to the formation history of the Moon. Here, the pristine troctolite, 76535 is found to have striking heterogeneities. Diffusion chronometry reveals that maximum cooling timescales have to be much shorter than previously estimated.* ******************************************************************************************************************************************* 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/u50ld-iprjksGdfzs2LX9FRHAMe3y7vAqPJd__;!!IKRxdwAv5BmarQ!LM06wq5Jb-E2XeJqgtR8_CNGehLeqmKqdga2gr4MK73dDM0HMzQImCobjJvS440$ <https://urldefense.com/v3/__https://ruhr-uni-bochum.zoom.us/meeting/register/u50ld-iprjksGdfzs2LX9FRHAMe3y7vAqPJd__;!!IKRxdwAv5BmarQ!O4SeAxf8EDGuA1zY57XFlrp216GmTygDRhpCxwYSsE35GWvAxCnPPJ08vR-j3Vo$> - all registrants will receive a link to the seminar that is valid for that person only. *A seperate registration is required for every seminar*. A recording of each seminar is available via the following link: https://urldefense.com/v3/__https://diffchron.ruhr-uni-bochum.de/seminars/__;!!IKRxdwAv5BmarQ!LM06wq5Jb-E2XeJqgtR8_CNGehLeqmKqdga2gr4MK73dDM0HMzQImCobfCj82Rc$ <https://urldefense.com/v3/__https://diffchron.ruhr-uni-bochum.de/seminars/__;!!IKRxdwAv5BmarQ!O4SeAxf8EDGuA1zY57XFlrp216GmTygDRhpCxwYSsE35GWvAxCnPPJ08JoxFRdQ$> 1-1-1-1-1-1-1-1-1-1-1-1-1-1 ------------------------------
