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1、1000-0569/2011/027(09)-2600-08ActaPetrologicaSinica巖石學報云南大坪金礦床賦礦閃長巖鋯石SHRIMPU-Pb定年*及其地質意義1，21，3，4＊＊3，41，53，411張燕孫曉明石貴勇熊德信翟偉潘偉堅胡北銘1，21，3，4＊＊3，41，53，411ZHANGYan，SUNXiaoMing，SHIGuiYong，XIONGDeXin，ZHAIWei，PANWeiJianandHUBeiMing1.中山大學地球科學系，廣州51027512.華東有色地質勘查局，南京2100073.
2、中山大學海洋學院，廣州5102754.廣東省海洋資源與近岸工程重點實驗室，廣州5192755.廣東省肇慶學院，肇慶5260611.DepartmentofEarthscience，SunYat-senUniversity，Guangzhou510275，China2.EasternChinaGeological＆MiningOrganizationforNon-ferrousMetals，Nanjing210007，China3.SchoolofMarineSciences，SunYat-senUniversity，Guan
3、gzhou510275，China4.GuangdongProvincialKeyLaboratoryofMarineResourcesandCoastalEngineering，Guangzhou519275，China5.ZhaoqingUniversityofGuangdongProvince，Zhaoqing526061，China2010-02-28收稿，2010-05-11改回.ZhangY，SunXM，ShiGY，XiongDX，ZhaiW，PanWJandHuBM.2011.SHRIMPU-Pbdatingo
4、fzirconsfromdioritebatholithhostingDapinggolddepositinAilaoshangoldbelt，YunanProvince，China.ActaPetrologicaSinica，27(9):2600－2608AbstractBeingoneofthelargestgolddepositsinAilaoshangoldbelt，theDapinggolddepositishostedinaductiledeformedandalterateddioritebatholith，a
5、ndisbelievedtobeatypicalCenozoicorogenictypegolddeposit.Inthisstudy，SHRIMPU-Pbdatingofzirconfromthedioritebatholithwasperformed，andtheresultis773±12Ma，suggestingthatthedioritewasaLateProterozoicbatholith，butnotacommonlyrecognizedCaledonianrockbody.Thedioritebatholi
6、thisaproductoflarge-scalebasictoacidicmagmatismduringtheJinning-Chengjiangepoch，andiscorrespondingtoaperiodofGondwanaaccretionafterRodiniandispersion.4039TheformingageofthedioriteisnearlythesameasthehightemperatureAr-Arplateauage(765.5±7.0Ma)offluidinclusionsinDapi
7、ngauriferousquartzveins，suggestingthattheDapinggolddepositwasformedduringmultiplemetallogenicepochs:themajororebodywasformedduringCenozoicorogeny，whilethegoldmineralizationwasstartedduringJinningorogeny.Cenozoicepochzirconsare4039alsorecognizedinthediorite，andtheag
8、e33.7±1.1MaisnearlythesameastheAr-Arage(33.76Ma)ofhydrothermalsericitefromtheDapingauriferousquartzveins，suggestingthatthesomeofthezirconswerepro
