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(,100083)(50km2),,,32.3Ma1.7Ma,,,,,0,(1),50km21,,860km,220km,112E,1106N1230N,20NE50,11530E,620,50,1230N1830N,11900E,1030km,20km,100300nT,450nT,,,5070,,,80100,11530E,1430N1630N,18,,,,200,30km2T19971021224Vol.22,No.419988GEOPHYSICAL&GEOCHEMICALEXPLORATIONAug.,19981T(315)2T1(m);2T21973,BenAvahemUyedaEW1979,,,,1980TaylorHayes,5D11,(3217Ma)1981,,1985,,,1317,(3540Ma)1987,EW5D11,NE2732;1990,,NE5C6,2016Ma;,,,,,,,,,(1),,,3724:(2),,,,(3),,(4),,,,,,33000m,NESW11630E,,4000m16km232003500m,4000m,4400m,34003900m,,500m,1000m,,,,,,500m50,(EW)(SN)(NESW),,,,,T,,,56km,(M)0.810-33.010-3A/m,,,T,,,,,,,,T,,:(1),,1030km,47222,100400nT(2),,,,,(3),,,,,(4),,,,,,,1d/kmV/(kms-1)4.51.510.451.52.521.754.06.034.706.47.047.98.4,1980,,,,,,,,1957,(N.N.Hill),(1)2d/kmV/(kms-1)3.54.51.511.760.621.52.521.990.404.990.2733.220.706.800.2348.180.18,19881987,(2)12,2,2,,22A()2B(),5.5km,2,,,EW,NE,EW1650N,EW1400N,280km,NE11840E,230NEEW,,NEEW5724:,11840E1700N,25511510E1610N;11820E1412N,11630E1350N3NETT,NSNE,,T,T,NE5D6C,17.424.8Ma,(3),EW,7.111,25.132Ma,(4),NE10NW,NE,EWSN8(5)4TT,,6722251();2();3();4;5;64,,,,SN,NWSE,,,,2.77cm/a,NWSE2.28cm/a,7724:,,,,,,EW,,,32.3Ma(),25.1Ma,,,24.8Ma,,NESW,NWSE,17.4Ma,,,1TaylorBandHayesDE.ThetectonicevolutionoftheSouthChinabasin.ThetectonicandgeologicevolutionofsoutheastAsianseasandIslands,Geophys.Monogr.ser,AGU.WashingtonDC,23:89104.2..,1982,(1)3,..:.:,1988,(1)4,..,1982,(1)5WBrianHarland,etal.Ageologictimescale.1989.6..,1987,9(1)7..,1990,(6)CHARACTERISTICSOFSTRIPEDMAGNETICANOMALIESINTHECENTRALSEABASINOFTHESOUTHCHINASEAFangYingyao,ZhouFuhong(AerogeophysicalSurveyandRemote2Sensingcenter,MLR,Beijing100083)AbstractInthecentralseabasinoftheSouthChinaSea,therearevastprominentlyregularstripedanomalieswhichoccupyanareaofnearly500000km2.Onthebasisofanalyticalcorrelationandinterpretationoftheseanomalies,itisheldthattheyaremanifestationsofmagneticstripedstrataproducedbyseafloorspreadingofthecentralspreadingoceanridgetype,andserveasanexampleoftheoceaniccrustaccretion.ItoccurredinMiddle2LateTertiary(32.3Ma1.7Ma),andexhibitscharacteristicsofseafloorspreadingonthewesternmarginofwesternPacificOcean.TheaboveachievementobtainedhasdeepenedtheunderstandingoftheformationandevolutionoftheSouthChinaSea,acontroversialproblemamonggeologistsbothinChinaandabroad,andhenceisofgreatsignificanceinthestudyofdeep2seatedgeologicalstructureoftheSouthChinaSeaandcrustalstructureaswellasthedevelopmentofmineralresources.Keywordsstripedmagneticanomaly,SouthChinaSea,seafloorspreading,accretionofoceaniccrust.,,193411,195540,,3087222