Talk:Divergent double subduction

A fact from Divergent double subduction appeared on Wikipedia's Main Page in the Did you know column on 11 December 2017 (check views). The text of the entry was as follows:

Did you know... that in divergent double subduction, an ocean shrinks and sinks?

A record of the entry may be seen at Wikipedia:Recent additions/2017/December. The nomination discussion and review may be seen at Template:Did you know nominations/Divergent double subduction.

Wikipedia

Review by Graeme Bartlett

Hi Leonkh. I am going to provide a gratuitous review.

You mention some examples in the introduction, but you don't tell us any more. Perhaps you could have a section near the bottom with an example, with a diagram and map. Are there any textbooks or review articles that could be used to reference this? This type of reference is preferred to primary references as they are more selective, and hopefully will have weeded out any errors. Graeme Bartlett (talk) 11:05, 15 October 2017 (UTC)[reply]

You mention Lachlan Fold Belt (which I wrote so thanks for linking it) but it makes no mention there of "Divergent Double Subduction" so it will need to be added! (Actually there are many more references about the Lachlan fold belt with a profusion of theories and models.

Please indicate the "mantle wedge" on your initial stage diagram. Graeme Bartlett (talk) 07:35, 25 October 2017 (UTC)[reply]

Review by Jupiter

Hi Leonkh.

Your page gives a good introduction of Divergent Double Subduction with clear structure (evolution, features and factors). I think it is a good page with easy wordings, simple diagrams and precise content. The standard is also suitable for high school.

Here are some suggestions:

1. It will be good to include a example section, maybe with a map to shown the locations. In this case, the reader can know where can we found this system on Earth.

2. An animation showing the evolution may be a good idea also to lively present the movements. As you have already drawn the evolution diagrams, you can simply use them to make an animation. A simple one maybe good to introduce the system at the introduction part of the page.

3. You may want to add more links to direct people to the main articles. For example, you can add a link to the page of intrusion, magmatism, metamorphism and volcanism in the "Magmatic and Metamorphic features" section, and unconformity in the "Structural features" section. Usually it will be put under the subtitle as below:

Unconformity

Main Article: Unconformity

When the two overriding plates collide and the ocean basin is closed, .....

Generally, I think it is a good draft in presenting this topic. You may want to add more links, media and examples to make it more informative. Jupmira104(talk)

Feedback from Eunicecyl

Hi Leonkh,

Generally I think this page is informative and easy to understand:)

1. You have mentioned a few places with the double divergent system yet without a map or any cross-section diagram? Maybe it would be better to add some figures or a slight description of the system in a real-life scenario.

2. I am not sure if this system is backed up with any other evidence? (aside from the structural features?) Are there any research e.g. seismic data detecting the subducted oceanic plate? I think it would be nice to explicitly list out the evidence that lead to the conclusion of this model or its controversy?!

3. And a final minor suggestion. You may consider adding a "see also" section that lists out other subduction systems, linking it to other related page.

Cheers :) — Preceding unsigned comment added by Eunicecyl (talk • contribs) 16:59, 23 October 2017 (UTC)[reply]

Review from YCYBenjamin

Hi, your page is cool. The presentation is clear and concise. Just some minor points to add:

1. Add a gif animation at the end of 'Evolution of Divergent Double Subduction system' to link all stages up.

2. Some new terms appeared in 'Magmatic and Metamorphic features', e.g., isotopic characteristics, S-type granitoids and rhyolitic. Try to explain more or add links to them.

3. Try to make some figures to illustrate the examples and steps of motion you mentioned in 'Structural features' and 'Factors controlling the evolution of divergent double subduction system'.

4. Are there any alternative models for Divergent Double Subduction system? Seems your page is mainly based on few references (#1,4,10).

It's a really nice page, keep going! Look forward to seeing your final product! — Preceding unsigned comment added by YCYBenjamin (talk • contribs) 19:21, 23 October 2017 (UTC)[reply]

Review by Jupiter 20171120

Hi Leonkh.

Your page make use of diagram and easy description to explain divergent double subduction system. I think the diagram in the beginning is very useful to show the difference of the system with a typical convergent and divergent plate boundaries. It may be better if you add some labels on the diagrams. For the example part, it will be clearer to list them with a global map showing the locations. Those are just some minor suggestions. In general, the organization, language and diagrams make your page effective in explaining the system. — Preceding unsigned comment added by Jupmira104 (talk • contribs) 09:23, 20 November 2017 (UTC)[reply]

Comments from GeoJeremy

Thank you for your informative page.

Here are my suggestions: 1)Is there any numbers showing the extent of depletion and enrichment characteristics of the arc volcanic rocks? 2)Is there any controversies over this topic? 3)Maybe include a section on the significance of this type of subduction.

GeoJeremy (talk) 08:21, 21 November 2017 (UTC)[reply]

Review from Xaviertang

Hi Leonkh, I have learnt a lot from your page! And it has broaden my understanding about geology. However, I think a few things could still be added to enhance the readers' understandings.

First, is there any relevant field figure available for reference to see what sort of geomorphology impacts that this tectonic setting imposes? An annotated map could also help.

Second, the picture at the very beginning is too big. I think it could be put below the contents.

Third, geographical distribution of divergent double subduction could be added to give the reader the sense of geography of this tectonic setting.

Xaviertang — Preceding unsigned comment added by Xaviertang (talk • contribs) 15:01, 21 November 2017 (UTC)[reply]

Review from Dinohk

I think the figures illustrating the different stages are quite good but it would be even better if you turned in into one animation.

You have also done a pretty good job with explaining what a divergent double subduction is but the page would really benefit from having a significance section explaining the importance of this type of subduction.

Review from eunicecyl

Very nice structured article, each section expresses the core ideas well. For some comments. While expressing 3D situation in diagram like the one talking about “Torodial flow of slab trapped mantle at the edge of the oceanic plate”, it might be better to avoid putting lines close to each other, like the right arrow and the lower edge of the plate so the diagram would be clearer, it might be better to add colours for distinguishing surfaces too. Some minor grammar mistakes may have been overlooked. After all it is a very informative and concise article! Eunicecyl (talk) 04:12, 22 November 2017 (UTC)[reply]