佳木斯地块东北缘早二叠世六连岩体_省略_因_岩相学_年代学和地球化学证据_于介江

《佳木斯地块东北缘早二叠世六连岩体_省略_因_岩相学_年代学和地球化学证据_于介江》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、佳木斯地块东北缘早二叠世六连岩体_省略_因_岩相学_年代学和地球化学证据_于介江1000-0569/2013/029(09)-2971-86ActaPetrologicaSinica岩石学报佳木斯地块东北缘早二叠世六连岩体的岩浆混合成因：岩相学、年代学和地球化学证据*于介江侯雪刚葛文春张彦龙柳佳成YUJieJiang，HOUXueGang，GEWenChun，ZHANGYanLongandLIUJiaCheng吉林大学地球科学学院，长春130061CollegeofEarthSciences，JilinUniversity，Changchun130061，Chin

2、a2013-05-13收稿，2013-08-13改回YuJJ，HouXG，GeWC，ZhangYLandLiuJC.2013.MagmamixinggenesisoftheEarlyPermianLiulianplutonatthenortheasternmarginoftheJiamusimassifinNEChina：Evidencesfrompetrography，geochronologyandgeochemistry.Acta29（9）：2971－2986PetrologicaSinica，AbstractThispaperreportspetrogra

3、phical，zirconU-Pbdating，whole-rockgeochemicalandzirconHfisotopedataofthehostgranodioritesandmaficmicrogranularenclaves（MMEs）fromtheLiulianplutonatthenortheasternmarginoftheJiamusimassifinNEPbagesof284MaChina，withtheaimofconstrainingformationtime，———————————————————————————————————————

4、————————petrogenesis，andtectonicsettingofthepluton.ThezirconU-and278Mahavebeenobtainedfromthehostgranodioritesandthehornblende-gabbrosfromMMEs，respectively，indicatingthattheLiulianplutonformedinEarlyPermianratherthanpreviouslybelievedlateIndo-Chineseepoch.TheMMEsdisplayigneous-texture

5、andsomeofthemarecharacterizedbyplasticflowdeformation.Quenchedmargin，backveinsandacicularapatitecanbefoundinsomeMMEs.ThedisequilibriummineralassociationsordisequilibriumtexturesaredevelopedinbothMMEsandhostgranodiorites.CombinedwiththezirconU-Pbageandgeochemicaldata，wecandistinguishth

6、atLiulianplutonistheproductofmagmamixinginEarlyPermian.Thewhole-rockgeochemicalandzirconHfisotopicdatashowthattheprimarymagmaofthehostgranodioritecouldbederivedfrompartialmeltingofthemaficigneousrocksinthelowercrustwhichoriginatedfromdepletedmantleinNeoproterozoic，andtheprimarymagmaof

7、MMEswasderivedfromthepartialmeltingofthedepletedmantlewedgethathadbeenmetasomatizedbyfluidsreleasedfromafossilsubductedslab.Consideringthespatialvariationofcoevaligneousrockassociationsandregionaltectonicevolution，weconcludethattheEarlyPermianLiulianplutonoccurredinanactivecontinental

8、margi