洋盆封闭后我们有时所忽视的东西:以澳大利亚东部的显生宇为例

Theprevailing‘consensus’explanationforPhan-erozoicdevelopmentofeasternAustraliaenvisagesa‘retreatingaccretionaryorogen’inwhichepisodicslabretreatresultedindevelopmentofoffshoreislandarcsinfrontofmarginalbasins.Periodically,thiswasfol-lowedbyintervalsofplate-couplingduringwhichthesebasinscloseandthearcsareretro-thrustbackontothecontinentalmargin.Implicitinthismodelisthenotionthatallelementsdevelopedinanupperplatelocationupontheaccretionarymarginandthatwest-dippingsubductionbeneatheasternGondwanawasalong-livedphenomenon.