Hello,
I’m new to ASPECT. I study crystallographic preferred orientation and I’d like to create a transition of type A of Olivine into type B.
I assume I need to make the corresponding transition of temperature and stress or set the minerals parameter (under subsection Particles->Crystal Preferred Orientation->Initial grains) so it transitions, but I’m a bit lost in the pile of files and variables and I’m not sure how to do that (despite going over the documentation).
Any assistance would be appreciated.
P. S
ASPECT is great and truly inspiring!
Thanks!
Neta
Thank you for posting your question here and welcome to the community.
Before diving into the details, a clarification question: Is the transition from A to B type olivine you would like to include in your simulations solely for calculating CPO using the current particle plugin, or is this new functionality you would like to implement related to the rheology (viscosity calculation) or other physical processes?
Hi John,
Thank you very much for your response. It’s a great honor to receive an email from someone like you.
Meanwhile, my goal is to use the transition from A to B solely for calculating CPO.
Thanks again!
Neta
If the above resources don’t have the information you need, can you post the following?:
A summary of what you have currently done with ASPECT and what features/information you need to for the A/B type transition.
An example PRM file (ideally a simple test) that contains the CPO implementation for one olivine CPO type and you would like to modify to include the A/B transition?
Hi John,
Thank you very much for your response. Your patience and true will to help is not to be taken for granted.
I’ve run the file drex.prm to generate output files (out_drex_olivineA \ particles_cpo) which simulate the evolution of type A CPO, starting from random texture. I then used these files to generate pole figures so that I could actually visualize the evolution process. I believe strain is increased throughout this evolution, but there are probably other factors that come into play. Since all of this is new to me though, I’m not sure exactly what those are. Is there a way to specify a transition (from A to B say) or do I need to make a change in the conditions (temperature, stress, etc) that are associated with each type? The main thing I’m trying to understand is what are the parameters I need to change in order to make this transition and where they are located.
If there is a way to specify the transition directly, I guess I need the PRM file attached below (maybe in the Initial grains subsection? ) This file is almost identical to the one in the first link you sent. Otherwise, I probably need to change something in the temperature, stress and water content conditions but I’m not sure which files / parameters I need to modify.
Thanks a lot!
Neta