[GPlates-discuss] letter

[shaofeng at cugb.edu.cn]

Dear Nico,
Thank you for your response. For the first question, you gave me very good suggestion, and I will exclude the tracer within hundreds of km wide along the edge of the obducting plate, and let continent lithosphere subduct under the overridding plate for a gven distance. The both may get a kind of material balance. Hope it will work. For the second question, Yes, I did this by the way what you suggested, making different topological networks for the situation when the subduction zone in one side and the situation when the subduction zone jumping to the other side in 1 Mys. If making the reconstruction like this way, the subduction zone will break up when it does this jump. What do think? If you have further suggestions please let me know. Thanks again!

Best wishes
Shaofeng  
   



shaofeng at cugb.edu.cn
 
From: Nicolas Flament
Date: 2016-03-20 12:37
To: gplates-discuss at mailman.sydney.edu.au
Subject: Re: [GPlates-discuss] letter
Dear Shaofeng,
 
1/ It is difficult to model total topography in the vicinity of subduction zones using the workflow that assimilates reconstructions build with GPlates in CitcomS, as tracers get piled up and entrained to depth if they are considered in the vicinity of the subduction zone, or one obtains a trough if tracers are excluded within a given distance of subduction zones (see Figs 5 and 6 of Flament et al. 2014, EPSL). From what you describe I think you might be in the latter case so I recommend changing the initial tracer set up.
2/ I would build topologies so that the subduction zone jumps from one side of the block to the other. Modelling the total topography of small blocks near subduction zones in global models sounds challenging - good luck!
 
Regards
 
Nicolas
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