%0 Journal Article
%T 晚古生代冈瓦纳的演化长逾13500km的基墨利超级地体的裂离及其向亚洲的漂移
%A Jason R. ALI
%A Jonathan C. AITCHISON
%A Haz M.C. CHEUNG
%A Sam S.Y.CHIK
%A SUN Ya-dong
%J 地球学报
%D 2012
%R 10.3975/cagsb.2012.s1.02
%X TheCimmerianterraneformsanalmostunbrokenchainstretching>13,500km,fromcentralsouthernEuropetowesternIndonesia,viaSEEurope,theMiddleEast,Afghanistan,Tibet,SWChinaandMyanmar.Ar-guably,itisEarth’smostspectacularexampleofa“sliver”terrane,dwarfinginsizemorerecentlydevel-opedexamples,forinstancethePalawanBlockinthewesternPhilippines,andtheLordHoweRiseintheTasmanSea.Thepresentationwillfirstoutlinethein-triguinggeologicalfeaturesassociatedwiththisuniquetectonicentity.Followingthat,recentlyobtainedresultsfollowingpaleomagneticinvestigationsoftwolowerPermianrift-relatedbasaltsuiteswillbesummarized(AborVolcanicsinnortheasternIndiaandWoniusiBa-saltsinYunnan,China).Thetwostudiesarepartofalargerprogrammeofongoingresearchaimedatdeducing(I)thegeodynamicconfigurationthatgeneratedtheun-usualriftingsystem,and(II)exactlyhowCimmeriafit-tedagainstGondwanapriortoitsdispersalintheEarlyPermian.ThecriticalunitisBaoshan,whichwefitagainstGondwanawithinanarrowlongitudinalbeltclosetowherenorthernIndiaandnorthwesternAustraliawereonceincloseproximity(Fig.1).Furthermore,wesuggestthatSibumasulaytodirectlytheeast,offshoreofAustralia;QiangtangandLhasaalmostcertainlysattothewest(offnorthernGreaterIndia-SEArabia),butweareuncertainastotheirexactconfiguration.Ourfindingswillbecomparedwithseveralratherdifferentmodelsthathavebeenpublishedinrecentyears.Thenewpa-leomagneticconstrainthighlightstheflexibilityauthorscurrentlyhaveinreconstructingtheregion,principallybecauseoftheoveralllackofsimilarhigh-qualitydatafromthevariousblocks.Weexplainhownewdatacouldresolvetheseambiguities,therebyofferingmorerobustexplanationsforeasternGondwana’slatePaleozoicde-velopment.
%K Cimmerianterrane
%K Paleomagnetism
%K BaoshanBlock
%K SibumasuBlock
%U http://www.cagsbulletin.com/dqxbcn/ch/reader/view_abstract.aspx?file_no=2012s102&flag=1