[CIG-LONG] Complex crustal model simulations

[Lester Anderson]

Hello Walter

 

Yes the example that you illustrated is essentially what I would be looking to try and simulate, but keeping things a bit simplified by just having the subduction and back-arc extension. I would not be looking to test the loading as this is something I can work with gravity models for.

 

In terms of crustal thickness, I would be looking to test a 2D model with the back-arc region having a thicker crust/lithosphere compared to the fore-arc zone, with both regions having a continental rheological model.

 

The tests I would be interested in looking at would consider the rate of subduction and back-arc spreading and varying the subduction angle. If GALE can model the thermal profile over time that would be good too. Keeping things 2D does make things simpler. Hope that this clarifies some points better.

 

Regards


Lester Anderson 
 
> Date: Fri, 27 Nov 2009 12:03:30 -0800
> To: cig-long at geodynamics.org
> From: walter at geodynamics.org
> Subject: Re: [CIG-LONG] Complex crustal model simulations
> 
> Lester Anderson <lester_anderson1963 at hotmail.com> wrote:
> > Hello
> > 
> > Just a quick one. Is it possible to use GALE to simulate a subduction model
> > with an extending back-arc basin in a single model? If this is possible, does
> > someone have an example code to illustrate this?
> 
> Could you be more specific in terms of what you want? For example, if
> you look at
> 
> http://upload.wikimedia.org/wikipedia/en/a/a4/SubZone.jpg
> 
> (also attached) do you want to do the whole box, or would the subduction and
> asthenospheric motions be the boundary conditions? Flexure is not
> implemented, so you could not include that. Also, melt generation is
> not implemented yet.
> 
> In any case, the model would probably require fairly good resolution,
> but it should be quite possible in 2D.
> 
> Cheers,
> Walter Landry
> walter at geodynamics.org
 		 	   		  
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