Subduction polarity reversal: Difference between revisions

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|'''1) Cross-section A-A’''' <ref name=":132222"/> (Post-collision): The passive continental margin of [[Eurasian Plate|Eurasian plate]], a buoyant continental crust, overrides the [[Philippine Sea Plate|Philippine sea plate]] .The Eurasian plate is undergoing lithospheric stretching, forming the [[Okinawa Trough]].<br/>

'''2) Cross-section B-B’''':<ref name=":132222" /> The [[Philippine Sea Plate]] subducts beneath the [[Eurasian Plate|Eurasian plate]], and [[Ryukyu Trench|Ryukyu trench]] [[Oceanic trench#Trench rollback|roll-back]] leads to the extensional collapse of Taiwan orogenic wedge.<ref name=":52222"/> The direction of subduction changes in cross-section C-C'.<br/>

'''3) Cross-section C-C’''':<ref name=":132222" /> Drastic collision between two plate creates an accretionary wedge and develops orogenic belt. Taiwan orogens reached the maximum height with an equal amount of erosion and growth rate.<ref name=":15222">{{Cite journal|last=Suppe, J. (1984)|title=Kinematics of arc-continent collision, flipping of subduction, and backarc spreading near Taiwan|url=http://twgeoref.moeacgs.gov.tw/GipOpenWeb/imgAction?f=/1984/19840281/0021.PDF|journal=Mem. Geol. Soc. China|volumeissue=6(21), V33.|pages=21-33}}</ref> The angle of the slab is almost 80 degrees dipping downward.<ref name=":6222">{{Cite journal|last=Ustaszewski|first=Kamil|last2=Wu|first2=Yih-Min|last3=Suppe|first3=John|last4=Huang|first4=Hsin-Hua|last5=Chang|first5=Chien-Hsin|last6=Carena|first6=Sara|date=2012-11-20|title=Crust–mantle boundaries in the Taiwan–Luzon arc-continent collision system determined from local earthquake tomography and 1D models: Implications for the mode of subduction polarity reversal|url=http://www.sciencedirect.com/science/article/pii/S0040195111005385|journal=Tectonophysics|series=Geodynamics and Environment in East Asia|volume=578|pages=31–49|doi=10.1016/j.tecto.2011.12.029}}</ref><br/>

'''4) Cross-section D-D’''':<ref name=":132222" /> The [[Eurasian Plate|Eurasian plate]] is actively subducting into the [[Philippine Sea Plate|Philippine Sea plate]] at 80mm/year along the Manila Trench.<ref name=":52222" /> The slab is penetrating into the mantle and the volume of melt in mantle wedge keeps increasing. Meanwhile, the angle of subduction slab is not as steep as in cross-section C-C'.<ref name=":6222" /> The accretionary wedge was just developed.<br/>

'''5) Cross-section E-E’''' <ref name=":132222" />(Pre-Collision): Slab penetrates beneath the [[Philippine Sea Plate|Philippine Sea plate]] and brings hydrous materials to generate a [[mantle wedge]]<ref name=":132222" /> and [[Luzon Volcanic Arc|Luzon volcanic arc]].