[CIG-LONG] Low viscosity material around dike

[Walter Landry]

Taichi SATO <taichix at aori.u-tokyo.ac.jp> wrote:
> Dear Garrett
> 
> Thank you very much!
> 
>> Try making the lithosphere 3-5 times thicker. Also, the "initialDamage"
>> parameters are designed to weaken one side of the dike so a fault 
>> localizes on this one side initially. 
> I made thicker axial lithosphere(8km) by changing
> thermal condition.  I also set "initial Damage"
> one side of the dike
> and changed mesh interval from 500m to 250m.
> Under above condition, I could see inward and
> outward faults.
> 
> However, the materials on either sides of the dike
> sink down. Please see attached file. I  think this
> structure is not ideal because I would like to
> make axial valley (it is OK if this is an Axial
> Volcanic Ridge).
> Does it come from wrong initial parameters, such
> as viscosity, temperature and divergence, etc ?

The materials are probably sinking down because the expansion velocity
is too high for the divergence you have.  So either reduce the
expansion velocity or increase the divergence.

Cheers,
Walter Landry
walter at geodynamics.org