[CIG-LONG] FW: Convergence issues with long-term extension models

[Walter Landry]

Tim Rawling <tim at modeltheearth.com> wrote:
> Hi cig-long group
> 
> sorry for the email I sent earlier, I meant for it to go just to Gilly
> but I am happy for any suggestions from the group.  I am new to using
> Gale but have been working with Gilly on some problems related to
> collision and closure of asymmetric basins constrained by some deep
> reflection seismic we acquired recently.  I am now extending the work
> Gilly did a little by looking at how the variation in rheology of that
> accreted basement may have effected the geometry of a subsequent
> extensional event.  
> 
> I am currently trying to set up a model that has a pre-existing
> weakness that cuts diagonally across the model volume (a relay fault if
> you like).  The shape would intersect the model front and right
> boundaries but not the back or left boundaries. Is it possible to
> create a shape like this in 3D using PolygonShape or is there are
> better way to do it that anyone can suggest?

How complicated is the shape of the weakness? If the weakness runs in
a straight line, you can use a box and rotate it.  Otherwise, you
could create an arbitrary shape by using lots of tiny boxes.

Cheers,
Walter Landry
walter at geodynamics.org