成矿流体动力学与大地构造环境的关系.pdf

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1、doi：10．165398．ddgzyckx．2015．03．004大地构造与成矿学卷(Volume)39，期(Number)3，~,(SUM)146页(Pages)4O2—412，2015，6(June，2015)GeotectonicaetMetallogeniaRelationshipsBetweenHydrodynamicsofMineralizationandTectonicSettingsCHIGuoxiangandLINGer1．DepartmentofGeology,UniversityofRegina，Regina$4SOA2，SK,Canad

2、a,"2．GuangzhouInstituteofGeochemistry,ChineseAcademyofSciences，Guangzhou510640，Guangdong,China)Abstract：Theformationofmostmineraldepositsrequirescirculationoflargeamountsoffluids，whichmaybedrivenbyvariousgeologicforces．Inthispaper,wedemonstratethatsuchforcesareintimatelyrelatedtotect

3、onicsettings．Geologicfluidflowmaybedrivenbytopographicreliefatthesurface，mechanicaldeformationoftherocks，andthermalgradientsandanomalies，allofwhicharerelatedtotectonicenvironmentsandprocesses．Thecombinationoffluidpressureregime，thermalregime，andtopographicreliefissuchthatupwardfluidf

4、lowisdominantineompressionalenvironments，suchastheorogenicgoldmineralizationsystems，whereasconvectionsystemsarebetterdevelopedinextensionalenvironments，e．g．，VMSandSEDEXmineralizationsystems．Topographicreliefandhorizontalshorteningassociatedwithcompressionalstressregimeinanorogenmaydr

5、ivefluidflowf0rhundredsofkilometerslaterallythroughtheforelandbasintostableplatformareas，suchasintheMVTmineralizationsystems．Thedetailedfluidflowpatterns，however,aremuchmorecomplexthanthisgeneralization，andevolvewithtectonicprocesses．Inareasthathaveexperiencedmultipletectoniccycles，s

6、uchasthediwaregions，mineraldepositsformedinearlycyclesmaybeoverprintedbythoseformedinlatecycles，andnewfluidinputfromthemantlemayberequiredformineralizationinthelatestages．Asmetallogenydealswiththerelationshipsbetweenmineralizationandtectonicsettings，andhydrodynamicsofmineralizationis

7、closelyrelatedtotectonicsetting，therefore，itisimportanttointegratehydrodynamicstudiesofmineralizationintometallogenicmodeling．Keywords：tectonicsetting；metallogeny；hydrodynamics；fluidflow；hydrothermaldeposits成矿流体动力学与大地构造环境的关系池国祥，林舸2f1．加拿大里贾纳大学地质系，萨斯喀彻温里贾纳$4S0A2；2．中国科学院广9呻地球化学研究所，广东广州5

8、10640)收稿日期：2