Editing Subduction (section)

=== Intra-oceanic: ocean/ocean plate subduction ===
Oceanic-Oceanic plate subduction zones comprise roughly 40% of all subduction zone margins on the planet. The ocean-ocean plate relationship can lead to subduction zones between oceanic and continental plates, therefore highlighting how important it is to understand this subduction setting. Although it is not fully understood what causes the initiation of subduction of an oceanic plate under another oceanic plate, there are three main models put forth by Baitsch-Ghirardello et al. that explain the different regimes present in this setting.<ref>{{Cite journal |last=Baitsch-Ghirardello, Gerya, Burg |first=Bettina, Taras, Jean-Pierre |date=March 2014 |title=Geodynamic regimes of intra-oceanic subduction: Implications for arc extension vs. shortening processes |journal=Gondwana Research |volume=25 |issue=2 |pages=546–560 |doi=10.1016/j.gr.2012.11.003 |bibcode=2014GondR..25..546B |url=https://www.sciencedirect.com/science/article/pii/S1342937X12003528#f0025}}</ref>

The models are as follows: 
# ''retreating subduction:'' caused by weak coupling between the lower and upper plate which leads to the opening of a back arc basin and the subduction zone being moved by slab rollback.
# ''stable subduction:'' caused by intermediate coupling between the lower and upper plate. The subduction zone generally stays in the same place and the subduction plate subducts at a consistent angle. 
# ''advancing subduction:'' caused by strong coupling between the upper and lower plate. The subducting sediments thicken causing partially molten plumes to be on top of subducting plate.