长江中下游成矿带安庆-贵池矿集区五横岩体的成岩年代和区域岩浆活动演化研究-论文.pdf

《长江中下游成矿带安庆-贵池矿集区五横岩体的成岩年代和区域岩浆活动演化研究-论文.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、1000-0569／2014／030(04)一1117-29ActaPetrologicaSinica岩石学报长江中下游成矿带安庆-贵池矿集区五横岩体的成岩年代和区域岩浆活动演化研究刘一男范裕严四华司志远。周涛发袁峰LIUYiNan，FANYu，YANSiHua，SIZhiYuan，ZHOUTa0FaandYUANFeng1．合肥工业大学资源与环境工程学院，合肥2300092．安徽省地质矿产勘查局326地质队，安庆2460031．SchoolofResourcesandEnvironmentalEngineering

2、，HefeiUniversityofTechnology，Hefei230009，China2．No．326GeologicalP0，AnhuiBureauofGeologyandMineralResources，Anqing246003，China2013—10-02收稿。2014-01—15改回．LiuYN，FanY，YanSH。SiZY，ZhouTFandYuanF．2014．PetrogensischronologyandevolutionofregionalmagmaticactivitystudyofAn

3、qing-GuiehioredepositconcentratedareaintheMiddle-LowerReachesofYangtzeRivermetallogenicbeltActaPetrologicaSinica。30(4)：1117—1129AbstractAnqing—GuichioredepositconcentratedareaislocatedintheMiddle—LowerReachesofYangtzeRiverfault．depressionzone．whereisthenorthmar

4、ginoftheYangtzeBlock．TheWuhengintrusionistheoneofthemostimportantintermediate．acidintrusivebodyintheYueshanorefield．Anqing．Guichioredepositconcentratedarea．Inthispaper．wepresentLA．ICP．MSU—Pbzirconageof139．3±1．3Ma，140．1±1．4Ma，140．0-4-1．6Mafordiorite．139．6±1．6Maf

5、orgabbro．dioriteand132．9±1．5Maformonzodiorite．Theepochofintrusionsuggeststllatdioriteandmonzodioritearetheproductsofmagmatismindifferentperiod．Combinedwithgeologicalcharacteristics．Wuhengintrusionshouldbedividedintotwodiferentparts．Onthebaseofanintegratedstudyo

6、favailablepetrological，geochemicalanddiageneticchronologyofmagmticrocksinYueshanorefield，wedivideintrusionintotwoperiod，earlyintrusiverockaremainlydiorite，diageneticageisabout138—140Ma；lateintrusiverockaremainlygraniteandsyenite，whichhavegeochemistrycharacteris

7、ticsofA-typegranite，isabout123—126M~WuhengintrusionhaspreferablymetallogeneticpotentialityofskarnCu．Fe．Audeposit．whichtookplaceinatransitionaltectonicenvironmentfromcompressiontoextension．KeywordsWuhengintrusion；LA—ICP-MSU-Pbzircondating；Yueshanorefield；TheMidd

8、le—LowerYangtzeRiverValleymetallogeneticbelt摘要五横岩体是长江中下游成矿带中安庆一贵池矿集区月山矿田内重要的中酸性侵入岩体之一。本文对五横岩体中1个辉长闪长岩、3个闪长岩和1个二长闪长岩样品进行了锆石LA．ICP．MSU—Pb定年，得到年龄值为分别为139．6±1．6Ma、139．3±1．3Ma、14