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Thread: Is Louisville Ridge seamount chain a convergent boundary?

  1. #1 Is Louisville Ridge seamount chain a convergent boundary? 
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    For more than one month I've been trying to figure out what does it mean, the different westward rates of the two "micro-plates" northeast and southwest from Louisville Ridge on the picture "Underwater mountains - rate of destruction" from the article: BBC NEWS, Science & Environment, "Undersea mountains march into the abyss", Dec-6, 2011 < BBC News - Undersea mountains march into the abyss >, accessed Jan-11, 2012.

    The NE micro-plate makes westward 8sm per year and SW micro-plate makes 5.5sm westward per year. Could that mean that not only Tonga Trench is a convergent boundary, but also Louisville Ridge seamount chain itself is a convergent boundary as well?

    Could the same convergent mechanism be suggested for Louisville Ridge as it was suggested for Hawaii in my post: "Hawaii Convergent, Part 2. Introducing The Concept Of Geofracture (not Plate) Tectonics."

    Thanks.
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    The above message is slightly edited my post to GEO-TECTONICS list (sorry for the typo in the word "boundary" - "boiundary").
    Message-ID: <CAMETt9WnZ+6XvcWQnjD6sazQj5Fmqn-Q1Lad3ces0Y3aLd704Q@mail.gmail.com>
    Date: Wed, 11 Jan 2012 15:07:25 +0200
    Sender: Tectonics & structural geology discussion list <GEO-TECTONICS@JISCMAIL.AC.UK>
    Subject: Is Louisville Ridge seamount chain a convergent boiundary?


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  3. #2  
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    What is sm (as in sm/yr)?


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  4. #3  
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    sm = cm that is to say centimetres, I think. Perhaps arising from confusion over alphabets: the Cyrillic c is a Roman s.
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  5. #4  
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    Quote Originally Posted by Sergey S. View Post
    The NE micro-plate makes westward 8sm per year and SW micro-plate makes 5.5sm westward per year. Could that mean that not only Tonga Trench is a convergent boundary, but also Louisville Ridge seamount chain itself is a convergent boundary as well?
    surely not.
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  6. #5  
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    Quote Originally Posted by Sergey S. View Post
    The NE micro-plate makes westward 8sm per year and SW micro-plate makes 5.5sm westward per year. Could that mean that not only Tonga Trench is a convergent boundary, but also Louisville Ridge seamount chain itself is a convergent boundary as well?
    In plate kinematic models, If the pole of euler rotation is to the south, it is expected that velocities increase from south to north.
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  7. #6 The Louisville hotspot track does not show any rotation. 
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    Quote Originally Posted by florian View Post
    Quote Originally Posted by Sergey S. View Post
    The NE micro-plate makes westward 8sm per year and SW micro-plate makes 5.5sm westward per year. Could that mean that not only Tonga Trench is a convergent boundary, but also Louisville Ridge seamount chain itself is a convergent boundary as well?
    In plate kinematic models, If the pole of euler rotation is to the south, it is expected that velocities increase from south to north.
    The Louisville hotspot track, that is, Louisville Ridge seamount chain does not show any rotation of the plate, the track is quite linear (see Louisville Ridge on the the picture mentioned in my first post in this thread). Am I missing something?
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    Sorry for the delayed reply and for the typos "sm" -"cm".
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  8. #7  
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    Quote Originally Posted by Sergey S. View Post
    Quote Originally Posted by Florian
    In plate kinematic models, If the pole of euler rotation is to the south, it is expected that velocities increase from south to north.
    The Louisville hotspot track, that is, Louisville Ridge seamount chain does not show any rotation of the plate, the track is quite linear (see Louisville Ridge on the the picture mentioned in my first post in this thread). Am I missing something?
    No. You are discovering plate tectonics.
    Last edited by florian; January 16th, 2012 at 06:32 PM.
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  9. #8  
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    Quote Originally Posted by florian View Post
    Quote Originally Posted by Sergey S. View Post
    Quote Originally Posted by Florian
    In plate kinematic models, If the pole of euler rotation is to the south, it is expected that velocities increase from south to north.
    The Louisville hotspot track, that is, Louisville Ridge seamount chain does not show any rotation of the plate, the track is quite linear (see Louisville Ridge on the the picture mentioned in my first post in this thread). Am I missing something?
    No. You are discovering plate tectonics.
    So, the rear micro-plate moves faster than the head micro-plate the same westward direction. There is no rotation. Does not it mean that the convergent boundary is been jammed up between the micro-plates, Louisville Seamount Chain?
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  10. #9  
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    Quote Originally Posted by Sergey S. View Post
    There is no rotation.
    there don't has to be a rotation cause earth being a globe
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  11. #10  
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    Quote Originally Posted by nahshal View Post
    I actually quite like the tune. I wont admit it to anyone in person though because the songs quite girly.
    wrong thread?
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  12. #11  
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    No, it is SPAM and the SPAMbot mixed up two threads.
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  13. #12  
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    Quote Originally Posted by The Geographer View Post
    Quote Originally Posted by Sergey S. View Post
    There is no rotation.
    there don't has to be a rotation cause earth being a globe
    “The most general displacement of a rigid body over the surface of a sphere can be regarded as a rotation about a suitable axis which passes through the centre of that sphere. “

    You should look at this lecture.
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  14. #13  
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    Quote Originally Posted by florian View Post
    Quote Originally Posted by The Geographer View Post
    Quote Originally Posted by Sergey S. View Post
    There is no rotation.
    there don't has to be a rotation cause earth being a globe
    “The most general displacement of a rigid body over the surface of a sphere can be regarded as a rotation about a suitable axis which passes through the centre of that sphere. “

    You should look at this lecture.
    The Louisville hotspot track does not show any rotation of the plate "over the surface" of the Earth.
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