Talk:Ontong Java Plateau

From Wikipedia, the free encyclopedia
Jump to: navigation, search
WikiProject Volcanoes (Rated Start-class, Mid-importance)
WikiProject icon This article is within the scope of WikiProject Volcanoes, a collaborative effort to improve the coverage of volcanoes, volcanology, igneous petrology, and related subjects on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Start-Class article Start  This article has been rated as Start-Class on the project's quality scale.
 Mid  This article has been rated as Mid-importance on the project's importance scale.
WikiProject Geology (Rated Start-class, Low-importance)
WikiProject icon Ontong Java Plateau is part of WikiProject Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use geology resource. If you would like to participate, you can choose to edit this article, or visit the project page for more information.
Start-Class article Start  This article has been rated as Start-Class on the project's quality scale.
 Low  This article has been rated as Low-importance on the project's importance scale.

Rated start class[edit]

I rated this as a start class rather than as a stub, because it had some good references and a good image. I almost rated it as of mid importance for WPGeology, but couldn't quite get there. --Bejnar (talk) 09:15, 11 March 2012 (UTC)


It extruded some 100 million km3 of magma Obviously incorrect data, 100 million km3 = 10000 km * 10000 km * 1 km — Preceding unsigned comment added by (talk) 16:57, 9 September 2013 (UTC)

At ~1% of the Earth's area, that comes in at 5 million square km, so the quoted total would imply an average thickness of 20km, which seem a little high, although the maximum was 30 km. According to Coutillot and Renne (2003), the total volume is 44.4 million km3 Table1, although it's not clear whether that includes the Hikurangi plateau as well. So the number is of the right order, although I've yet find a supporting ref for the number used in the article - I'll add a citation needed tag. Mikenorton (talk) 20:40, 9 September 2013 (UTC)
Actually the 100 million km3 is there in the first reference "do the Ontong Java, Manihiki and Hikurangi large igneous provinces represent a single ~100 million km3 magmatic pulse? " it says in the abstract and finishes by saying "Given the now unequivocal evidence that Osbourn Trough was a spreading ridge, we consider that these plateaus are remnants of a formerly contiguous Ontong Java–Manihiki–Hikurangi large igneous province emplaced at ∼120 Ma." Mikenorton (talk) 21:03, 9 September 2013 (UTC)

Please, explain this sentences: "About 80% of the OJP is being subducted beneath the Solomon Islands. Only the uppermost 7 km of the crust is preserved on the Australian Plate". Firstly, OMP is on Pacific Plate (not on Australian). Secondly, according to this map: Australian plate is subducting beneath Pacific plate around Solomon Islands (not vice versa!). How can it be at all? — Preceding unsigned comment added by (talk) 18:24, 20 January 2017 (UTC)

I just read source for that (Mann & taira 2004) - it describes this such "The Solomon arc was the best example of an island arc polarity reversal on Earth. As shown schematically, ‘‘arc polarity reversal’’ is defined as a process in which subduction below an island arc ceases, the arc is accreted to the formerly consuming plate (here, the Pacific plate) and subduction reverses direction to consume the formerly overiding plate (the Australian plate)". I think that information needs to be in article (and scheme from source) — Preceding unsigned comment added by (talk) 19:25, 20 January 2017 (UTC)