Feb 24th, 2022: A seminar series on diffusion modelling to determine timescales of processes (Diffusion Chronometry)

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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, February 24* (16:30-18:30 *CET*)
with

*Weiran (Alex) Li,*

*University of Cambridge, UK:*
*â??Timescales of magma degassing and ascent revealed by apatite diffusion
chronometryâ??*

and

*Smruti Sourav Rout,*

*Christian-Albrechts-Universitaet zu Kiel, Germany:*
*â??Constraints on the dimensional parameters of magma storage as an extended
application of diffusion modelling: a case study of Taapaca volcano
(Chile)â??*

*******************************************************************************************************************************************

*Summary:*

*â??Timescales of magma degassing and ascent revealed by apatite diffusion
chronometryâ??*


*Magma ascent rates and volatile budgets are two major factors that control
volcanic eruption explosivity and styles. Our recent work has shown that
both factors can be determined using volatile chemistry of apatite: a
ubiquitous mineral in terrestrial and extra-terrestrial rocks. This talk
will introduce a new diffusion chronometer and model (ApTimer) built on
high-temperature experiments, instrumental analysis, and simulation of
F-Cl-OH multicomponent diffusion in apatite. We applied this chronometer to
Cl- and/or F-zoned apatite microphenocrysts from effusive and explosive
eruptions at three volcanoes and obtained magma ascent time-rates
consistent with those determined previously by different techniques. This
apatite chronometer may provide new insights into the cause of
effusive-explosive eruption transition at volcanoes and could be enhanced
with future experimental and modelling efforts.*

*â??Constraints on the dimensional parameters of magma storage as an extended
application of diffusion modelling: a case study of Taapaca volcano
(Chile)â??*

*Intra-crystal temperature constraints and diffusion timescales from
sanidine megacrysts of Taapaca volcano (Chile) put high resolution
constraints on the thermal history of the magma reservoir and the
associated timescales. This talk will illustrate how these results can be
further â??exploitedâ?? to constrain the dimensional parameters associated with
the storage and mobilization of the mushy magma reservoir of Taapaca.*

*******************************************************************************************************************************************

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/u5Mkf-mprDkvHN1ciXT5L61Yp7h_A4D1ujT9__;!!IKRxdwAv5BmarQ!I-D6epkbNzb-_ymbk_x4G1LyvNVwUuK00ZooxH3djYMjYYmDq7y-5z9yXNP110A$ 
<https://urldefense.com/v3/__https://ruhr-uni-bochum.zoom.us/meeting/register/u5Mkf-mprDkvHN1ciXT5L61Yp7h_A4D1ujT9__;!!IKRxdwAv5BmarQ!L1EVcXLjIpKCZPJ-YgpgacWlNT3CQwT3LH631ScEbCRKh5pKXZsrw0JvRaH88jQ$>
-
all registrants will receive a link to the seminar that is valid for that
person only. *A separate 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!I-D6epkbNzb-_ymbk_x4G1LyvNVwUuK00ZooxH3djYMjYYmDq7y-5z9yuF9iIWo$ 
<https://urldefense.com/v3/__https://diffchron.ruhr-uni-bochum.de/seminars/__;!!IKRxdwAv5BmarQ!L1EVcXLjIpKCZPJ-YgpgacWlNT3CQwT3LH631ScEbCRKh5pKXZsrw0JvPQdv0dY$>


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