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Sub-Duction Does Not Exist

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MrKappa

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Sub-Duction Does Not Exist
« on: October 26, 2008, 06:39:32 AM »
This is a map hosted at NOAA (National Oceanic and Atmospheric Administration). I have zoomed into the areas of interest.

The original map can be found here.

http://www.ngdc.noaa.gov/mgg/ocean_age/data/2008/ngdc-generated_images/whole_world/2008_age_of_oceans_plates.jpg

The peer reviewed paper responsible for the map can be found here.

www.agu.org/pubs/crossref/2008/2007GC001743.shtml



It claims a two arc minimum latitudinal resolution. The age of the sea floor on both sides of a deep sea trench are the same age. Deep sea trenches are currently believed to be the area at which a plate sub-ducts under one another as illustrated in this picture here.



http://en.wikipedia.org/wiki/Back-arc_basin


One plate cannot be sub-ducting under the other if both sides of the sea floor running alongside the trenches are the same age. Conclusion. There is no subduction occurring at deep sea trenches.

Sub-Duction Map
« Last Edit: October 26, 2008, 06:42:55 AM by MrKappa »
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Conspiracy Mastermind

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Re: Sub-Duction Does Not Exist
« Reply #1 on: October 26, 2008, 08:45:25 AM »
Huh? You are saying that because the rock running alongside the deep-sea trenches, like say the mid-atlantic ridge, where the plates are spreading apart, are the same age, subduction, which if memory serves occurs when an oceanic plate meets a continental plate, doesn't happen?
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MrKappa

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Re: Sub-Duction Does Not Exist
« Reply #2 on: October 26, 2008, 12:25:11 PM »
Quote from: Conspiracy Mastermind on October 26, 2008, 08:45:25 AM
Huh? You are saying that because the rock running alongside the deep-sea trenches, like say the mid-atlantic ridge, where the plates are spreading apart, are the same age, subduction, which if memory serves occurs when an oceanic plate meets a continental plate, doesn't happen?

No... "TRENCHES" are areas where a slab of basaltic rock is said to slide under a continental granitic slab or another slab of basaltic rock.

A sea floor "SPREAD" is where the basaltic sea floor diverges and moves away from each other. Spreading. The gap is then filled in with lava. These circle the entire planet.

Yes... I am saying that the age of the sea floor is the same age on both sides of trenches and sea floor spreads. This makes sub-duction impossible at the trenches as one plate sliding under another cannot be the same age adjacent to each other.



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ﮎingulaЯiτy

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Re: Sub-Duction Does Not Exist
« Reply #3 on: October 27, 2008, 07:28:52 AM »
I didn't really read your post because I feel like you haven't really studied the topic. I skimmed through and saw these mistakes within a few seconds.

Quote
Re: Sub-Duction Does Not Exist
Subduction?

Quote
A sea floor "SPREAD" is where the basaltic sea floor diverges and moves away from each other.
Rift?

I have seen small scale subduction firsthand in my geology class trips so I lost interest pretty fast.
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MrKappa

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Re: Sub-Duction Does Not Exist
« Reply #4 on: October 28, 2008, 06:04:26 PM »
Quote from: ﮎingulaЯiτy on October 27, 2008, 07:28:52 AM
I didn't really read your post because I feel like you haven't really studied the topic. I skimmed through and saw these mistakes within a few seconds.

I've only been studying for a few months. I think I may have misunderstood the resolution on the map. 2 arc resolution in mathematics is to do with the circumference and degrees between the angle. Or at least that's how it's explained on the gravity probe B website. Apparently the science community decided to do something slightly different with Mercator latitudinal arcs.

I am still looking for some kind of proof or disproof regarding the age of the sea floor on both sides of the trenches.

Yes... I have studied... I just always hyphenate sub-duction because the Firefox spell checker doesn't seem to like it either way.

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I have seen small scale subduction firsthand in my geology class trips so I lost interest pretty fast.

That would be impossible unless you had set up a time lapse camera for a few hundred years. How did you see the land sub-duct under another slab at the rate of 5mm per year? Sub-duction is purely inferred. Especially when you start to consider the mechanics of hinge roll back and back arc basin spreading. ( like Tonga, and Mariana )
« Last Edit: October 28, 2008, 06:10:16 PM by MrKappa »
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Benocrates

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Re: Sub-Duction Does Not Exist
« Reply #5 on: October 29, 2008, 07:06:48 AM »
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Quote from: Parsifal on July 26, 2010, 04:39:24 PM
Get the fuck over it.
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MrKappa

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Re: Sub-Duction Does Not Exist
« Reply #6 on: October 29, 2008, 08:48:53 AM »
Quote from: ﮎingulaЯiτy on October 27, 2008, 07:28:52 AM
small scale

What exactly is small scale sub-duction? Convection in a beaker?
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ﮎingulaЯiτy

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Re: Sub-Duction Does Not Exist
« Reply #7 on: October 29, 2008, 12:34:16 PM »
Roughly 20 meters of rock pushed up over another piece that is buried.
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Mr. Ireland

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Re: Sub-Duction Does Not Exist
« Reply #8 on: October 29, 2008, 02:19:00 PM »
What?  I'm lost.  Are you saying the continental/oceanic plates are the same age, and therefore subduction can't occur?  Or is there something about the two parting oceanic plates being the same age?
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MrKappa

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Re: Sub-Duction Does Not Exist
« Reply #9 on: October 29, 2008, 07:10:38 PM »
Quote from: Mr. Ireland on October 29, 2008, 02:19:00 PM
What?  I'm lost.  Are you saying the continental/oceanic plates are the same age, and therefore subduction can't occur?  Or is there something about the two parting oceanic plates being the same age?

I was more interested in the deep sea trenches. The marina trench in particular. The sea floor spreads which run down the middle of the Atlantic and East Pacific are the same age. That's fine. It's the areas which are said to sub-duct which are of interest. The trenches and troughs.
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Mr. Ireland

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Re: Sub-Duction Does Not Exist
« Reply #10 on: October 30, 2008, 07:18:26 PM »
Quote from: MrKappa on October 29, 2008, 07:10:38 PM
It's the areas which are said to sub-duct which are of interest. The trenches and troughs.

What about them and their ages?  What's not adding up, in general?
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Daz555

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Re: Sub-Duction Does Not Exist
« Reply #11 on: November 17, 2008, 08:39:26 AM »
Quote from: MrKappa on October 28, 2008, 06:04:26 PM
Quote
I have seen small scale subduction firsthand in my geology class trips so I lost interest pretty fast.

That would be impossible unless you had set up a time lapse camera for a few hundred years. How did you see the land sub-duct under another slab at the rate of 5mm per year? Sub-duction is purely inferred. Especially when you start to consider the mechanics of hinge roll back and back arc basin spreading. ( like Tonga, and Mariana )
Small scale subduction can be seen on the surface of lava lakes, along with spreading and strike-slip type movements.
« Last Edit: November 17, 2008, 08:43:03 AM by Daz555 »
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