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地球学报 2012
黑濑川地体源于亚洲大陆东缘何处？Keywords: KurosegawaTerrane,Fusulinacean,SouthChinaBlock,Paleomagnetic Abstract: Thepointatissue:TheKurosegawaTerraneiscomposedofcontinentalfragmentstransectingMesozoicterranesofaccretionarycomplexinSouthwestJapan(Fig.1).ItisanattenuatedtectonicsliverandconsideredtobeallochthonouswithrespecttothemainpartofSouthwestJapan.TheproblemofwhichcontinentalblockintheEastAsiancontinentalmarginisthesourceoftheKurosegawaTerranehaspuzzledJapanesegeologistsformanyyears.Firstly,wetrytoapproachthisissuebasedontheanalysisoffusulinaceanassemblageinaccretedterranescomposedofsubductioncomplexinthePacificRim.Secondly,byapplyingtheresultofthisanalysiswetrytolocatethesourceofthecontinentalfragmentsoftheKurosegawaTerrane.Thirdly,wetrytoproveitsvaliditywithanewpaleomagneticstudy.
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