西南日本黒濑川带的解剖：晚二叠世和早侏罗世增生混杂岩的构造-地层学与浅变质作用

TheKurosegawabeltformsarelativelynarrowterranethatcanbetracedcontinuouslythroughoutsouthwestandcentralJapan.ThemajorconstituentcontinentalfragmentsoftheKurosegawabeltincludeEarlyPaleozoicgraniticrocks,high-grademetamor-phicrocks,Carboniferousmetamorphicrocks(epi-dote-amphibolitefacies),Triassic-EarlyJurassicmetamorphicrocks(pumpellyite-actinolitefacies),serpentinitesofunknownage,Silurian–Devonianvolcanoclasticrocksintercalatedwithlimestones,andPermian–Jurassicshallowmarinesediments(e.g.,Ichikawaetal.,1956;Maruyamaetal.,1984;Faure,1985;Yoshikuraetal.,1990;Aitchisonetal.,1991,1996;Hadaetal.,1992,2001;Isozakietal.,1992).Thesediverserocksuitesarehighlydisrupted,form-inglenticularbodieswithintheLatePermianaccre-tionarycomplex(AC)whichcollectivelyarecoveredbyyounger(Cretaceous)marinetobrackishwatersediments(e.g.,Aitchisonetal.,1991;Isozakietal.,1992).Wecharacterizethetectono-stratigraphicar-chitectureandlow-grademetamorphismoftheaccre-tionarycomplexpreservedintheKurosegawabeltoftheKitagawadistrictineasternShikoku,SouthwestJapan,inordertounderstanditsinternalstructure,tectono-metamorphicevolution,andassessmentsofdisplacementofcontinentalfragmentswithinthecomplex.