云南大坪金矿床赋矿闪长岩锆石shrimpu_pb定年及其地质意义

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1、1000-0569/2011/027(09)-2600-08ActaPetrologicaSinica岩石学报云南大坪金矿床赋矿闪长岩锆石SHRIMPU-Pb定年*及其地质意义1，21，3，4＊＊3，41，53，411张燕孙晓明石贵勇熊德信翟伟潘伟坚胡北铭1，21，3，4＊＊3，41，53，411ZHANGYan，SUNXiaoMing，SHIGuiYong，XIONGDeXin，ZHAIWei，PANWeiJianandHUBeiMing1.中山大学地球科学系，广州51027512.华东有色地质勘查局，南京2100073.

2、中山大学海洋学院，广州5102754.广东省海洋资源与近岸工程重点实验室，广州5192755.广东省肇庆学院，肇庆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