[GPlates-discuss] GPlates-discuss Digest, Vol 40, Issue 1

[Zhitu Ma]

Hi Douwe,

Thanks for your reply.  

I just tried using reference frame ‘0’ but it gives me the same problem.  The rotation file I am using is Matthews_etal_GPC_2016_410-0Ma-GK07 that comes with GPlate.

I have attached the screen shot in the email, maybe helpful to find out what happens.



Zhitu Ma

> On Apr 13, 2017, at 2:41 AM, Douwe van Hinsbergen <douwework at gmail.com> wrote:
> 
> Hi Zhitu,
> 
> Check your rotation file: ‘1’ is typically used for the spin axis and is defined by a paleomagnetic reference frame, ‘0’ is the mantle and is given by a mantle reference frame. What reference frame are you using? If you use a pmag frame, then you’d expect a mismatch with hotspot tracks, for starters because there’s no paleolongitude control.
> 
> Hope this helps,
> Douwe
> 
> -- 
> Dr. Douwe J.J. van Hinsbergen | Associate Professor | Department of Earth Sciences | Utrecht University|   Heidelberglaan 2, 3584 CS Utrecht | Room 8.09 | tel. (030) 253 6712 | D.J.J.vanHinsbergen at uu.nl | http://www.geologist.nl |
> 
>> On 13 Apr 2017, at 00:17, gplates-discuss-request at mailman.sydney.edu.au wrote:
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>> Today's Topics:
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>>   1. tristan hotspot track (Zhitu Ma)
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>> 
>> ----------------------------------------------------------------------
>> 
>> Message: 1
>> Date: Wed, 12 Apr 2017 18:16:54 -0400
>> From: Zhitu Ma <zhitu_ma at brown.edu>
>> To: gplates-discuss at mailman.sydney.edu.au
>> Subject: [GPlates-discuss] tristan hotspot track
>> Message-ID: <9A0D6605-C21F-47AC-804B-E25727C47AE1 at brown.edu>
>> Content-Type: text/plain; charset="utf-8"
>> 
>> Hi all,
>> 
>> I am trying to use GPlate to compute the hotspot track for Tristan.  
>> 
>> I place a seed point at the current location of the Tristan hotspot, then I create a new feature as motion path.  I set the Plate ID to be 1 and the relative Plate ID to be 701.  I set the time from 90 My to current.  
>> 
>> I do get a track but it doesn?t seem to follow the topography shown by the gravity raster file.  I am wondering if anyone knows what happen?  Maybe I missed something very simple here.
>> 
>> All the files I am using are from the GPlate Feature collection and Rasters folders.
>> 
>> Thanks!
>> Zhitu Ma
>> 
>> 
>> 
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