[GPlates-discuss] How to check the min and max velocities in GPlates?

Thu Jan 28 14:36:20 AEDT 2016

Hi Nan,

You should also consider using a more recent plate motion model:
http://www.earthbyte.org/ocean-basin-evolution-and-global-scale-plate-reorg
anization-events-since-pangea-breakup/

It has quite a lot of updates since the Seton et al (2012) model.

Cheers,
Sabin 

--

DR SABIN ZAHIROVIC | Postdoctoral Research Associate
School of Geosciences | Faculty of Science

THE UNIVERSITY OF SYDNEY
Rm 403, Madsen Building F09 | The University of Sydney | NSW | 2006
M +61 416 775 589 P +61 2 9351 3625
E sabin.zahirovic at sydney.edu.au | W http://www.earthbyte.org
<http://www.earthbyte.org/> | R
http://www.researchgate.net/profile/Sabin_Zahirovic
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This email plus any attachments to it are confidential. Any unauthorised
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On 28/01/2016, 2:33 PM, "gplates-discuss-bounces at mailman.sydney.edu.au on
behalf of Sabin Zahirovic" <gplates-discuss-bounces at mailman.sydney.edu.au
on behalf of sabin.zahirovic at sydney.edu.au> wrote:

>Hi Nan,
>
>GPlates should be able to export the lon, lat, plate id of mesh node, vel
>magnitude, and vel azimuth.
>
>You can use AWK to extract by the particular Plate ID, and then use gmt
>gmtinfo (thanks for that update, good to know of the name change) to get
>the min/max of that plate¹s velocities.
>
>The high velocities may actually be a problem in the plate motion model.
>That¹s because the rotations are all cut off at 200 Ma, and GPlates cannot
>properly figure out the stage rotations and therefore velocities for
>201-200 Ma. You should be able to see that even visually with the velocity
>arrows in GPlates. Say if you want velocities at 190 Ma, GPlates
>interpolates the stage rotations, and therefore velocities, for 191 to 190
>Ma. If this is the case, start your model run and velocity export at 199
>Ma from GPlates. 
>
>Cheers,
>Sabin 
>
>
>--
>  
>DR SABIN ZAHIROVIC | Postdoctoral Research Associate
>School of Geosciences | Faculty of Science
>                  
>                  
>
>THE UNIVERSITY OF SYDNEY
>Rm 403, Madsen Building F09 | The University of Sydney | NSW | 2006
>M +61 416 775 589 P +61 2 9351 3625
>E sabin.zahirovic at sydney.edu.au | W http://www.earthbyte.org
><http://www.earthbyte.org/> | R
>http://www.researchgate.net/profile/Sabin_Zahirovic
>F https://www.facebook.com/earthbyte | T
>https://twitter.com/EarthByteGroup
>
>CRICOS 00026A
>This email plus any attachments to it are confidential. Any unauthorised
>use is strictly prohibited. If you receive this email in error, please
>delete it and any attachments.
>
>
>
>
>On 28/01/2016, 2:21 PM, "gplates-discuss-bounces at mailman.sydney.edu.au on
>behalf of Nan Zhang" <gplates-discuss-bounces at mailman.sydney.edu.au on
>behalf of nan.zhang at curtin.edu.au> wrote:
>
>>Hi Christian,
>>
>>After I open the Kinematics tool (attached snapshot), I clicked the
>>"velocity magnitude" and did get any response.
>>
>>When you mentioned "chose GMT (*.xy) as output and then batch process the
>>output files with GMT's "gmt gmtinfo" (formerly minmax).", what is the
>>exact command line for "batch the output files with gmtinfo", given my
>>file name velocity_200Ma.xy?
>>
>>I am trying to find the max velocity magnitude for different time frames,
>>because when I put Seton's model to the velocity .gpml file for ASPECT,
>>ASPECT returns me the max velocity at 200Ma is 28 m/yr?
>>
>>Bests,
>>Nan
>>
>>
>>
>>-----Original Message-----
>>From: gplates-discuss-bounces at mailman.sydney.edu.au
>>[mailto:gplates-discuss-bounces at mailman.sydney.edu.au] On Behalf Of
>>Christian.Heine at shell.com
>>Sent: Wednesday, 27 January 2016 10:54 PM
>>To: gplates-discuss at mailman.sydney.edu.au
>>Subject: Re: [GPlates-discuss] How to check the min and max velocities in
>>GPlates?
>>
>>Nan,
>>
>>in GPlates: Go to Utilities -> Kinematics tool (or CTRL+k). This is the
>>only place in the GUI where you can directly look at/query velocity
>>information. However, that tool only allows you to use a single feature.
>>If you want to do this for more features and in a more extensive way,
>>you'd have to use the data mining capabilities and Python to code up
>>workflows yourself (or even extend this using the Qt interface to build a
>>GUI widget).
>>
>>The way Bruce and I suggested earlier will allow you to do a batch
>>analysis of velocity data outside of GPlates. I'd say this is probably
>>the fastest and easiest option to get this done. In case that doesn't
>>answer your questions you maybe have to explain in more detail of what
>>you are trying to achieve.
>>
>>Christian (not Christina ;-)
>>
>>
>>
>>> -----Original Message-----
>>> From: gplates-discuss-bounces at mailman.sydney.edu.au [mailto:gplates-
>>> discuss-bounces at mailman.sydney.edu.au] On Behalf Of Nan Zhang
>>> Sent: Wednesday, 27 January 2016 2:50 PM
>>> To: GPlates general discussion mailing list
>>> Subject: Re: [GPlates-discuss] How to check the min and max velocities
>>> in GPlates?
>>> 
>>> Hi Sabin, I read through your paper. It is a good paper, while it does
>>> address my issue. My question is how to find a tool in GPlates
>>> interface, to do a statistics for the loaded velocity field (the max,
>>> min, and mean velocity magnitude). Besides Christina's suggestion
>>> early on, is there a direct tool in GPlates?
>>> 
>>> 
>>> 
>>> 
>>> 
>>> ________________________________
>>> 
>>> From: gplates-discuss-bounces at mailman.sydney.edu.au <gplates-discuss-
>>> bounces at mailman.sydney.edu.au> on behalf of Sabin Zahirovic
>>> <sabin.zahirovic at sydney.edu.au>
>>> Sent: Wednesday, 27 January 2016 4:28 PM
>>> To: GPlates general discussion mailing list
>>> Subject: Re: [GPlates-discuss] How to check the min and max velocities
>>> in GPlates?
>>> 
>>> Hi Nan,
>>> 
>>> Please check this paper that talks about all of these things:
>>> http://www.earthbyte.org/tectonic-speed-limits-from-plate-kinematic-
>>> reconstructions/
>>>  <http://www.earthbyte.org/tectonic-speed-limits-from-plate-kinematic-
>>> reconstructions>
>>> Tectonic speed limits from plate kinematic reconstructions ...
>>> <http://www.earthbyte.org/tectonic-speed-limits-from-plate-kinematic-
>>> reconstructions>
>>> www.earthbyte.org
>>> Citation Zahirovic, S., Müller, R. D., Seton, M., & Flament, N. (2015).
>>> Tectonic speed limits from plate kinematic reconstructions. Earth and
>>> Planetary Science ...
>>> 
>>> http://www.sciencedirect.com/science/article/pii/S0012821X15001235
>>> 
>>> Hope that helps!
>>> 
>>> Cheers,
>>> Sabin
>>> 
>>> 
>>> --
>>> 
>>> DR SABIN ZAHIROVIC | Postdoctoral Research Associate School of
>>> Geosciences | Faculty of Science
>>> 
>>> 
>>> THE UNIVERSITY OF SYDNEY
>>> Rm 403, Madsen Building F09 | The University of Sydney | NSW | 2006 M
>>> +61
>>> 416 775 589 P +61 2 9351 3625 E sabin.zahirovic at sydney.edu.au | W
>>> http://www.earthbyte.org <http://www.earthbyte.org/>  | R
>>> http://www.researchgate.net/profile/Sabin_Zahirovic
>>> <http://www.researchgate.net/profile/Sabin_Zahirovic>
>>> F https://www.facebook.com/earthbyte | T
>>> https://twitter.com/EarthByteGroup
>>> 
>>> CRICOS 00026A
>>> This email plus any attachments to it are confidential. Any
>>> unauthorised use is strictly prohibited. If you receive this email in
>>> error, please delete it and any attachments.
>>> 
>>> From: <gplates-discuss-bounces at mailman.sydney.edu.au> on behalf of Nan
>>> Zhang <nan.zhang at curtin.edu.au>
>>> Reply-To: GPlates general discussion mailing list <gplates-
>>> discuss at mailman.sydney.edu.au>
>>> Date: Wednesday, 27 January 2016 at 7:13 PM
>>> To: "gplates-discuss at mailman.sydney.edu.au" <gplates-
>>> discuss at mailman.sydney.edu.au>
>>> Subject: [GPlates-discuss] How to check the min and max velocities in
>>> GPlates?
>>> 
>>> 
>>> 
>>> Hi all,
>>> 
>>> 
>>> 
>>> I loaded Seton et al., 2012 data to generate some plate velocity files
>>> from 200Ma to the present day. One thing I want to check is the
>>> minimum and maximum velocity magnitudes. Who can give me some
>>>instruction?
>>> 
>>> 
>>> 
>>> Bests,
>>> 
>>> Nan
>>
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