简介:TheeasternHimalayansyntaxisinNamjagbarwaisahigh-grademetamorphicterrainformedbytheIndia-EurasiacollisionandnorthwardindentationoftheIndiancontinentintoAsia.Right-andleft-lateralslipzoneswereformedbytheindentationontheeasternandwesternboundariesofthesyntaxisrespectively.TheDongjug-Mainlingfaultzoneisthemainshearzoneonthewesternboundary.Thisfaultzoneisaleft-lateralslipbeltwithalargecomponentofthrusting.Thekinematicsofthefaultisconsistentwiththeshorteningwithinthesyntaxis,andtheslippinghistoryalongitrepresentstheindentingprocessofthesyntaxis.TheAr-ArchronologicalstudyshowsthattheageoftheearlydeformationintheDongjug-Mainlingfaultzonerangesfrom62to59Ma.ThisevidencesthattheIndia-EurasiacollisionoccurredintheearlyPaleoceneintheeasternHimalayansyntaxis.