安徽銅陵獅子山礦田銅、金共生分離的熱力學研究.pdf

1、合肥工業(yè)大學碩士學位論文安徽銅陵獅子山礦田銅、金共生分離的熱力學研究姓名：褚平利申請學位級別：碩士專業(yè)：礦物學、巖石學、礦床學指導教師：徐曉春20100401ThermodynamicstudyofcopperandgoldinfortheassociationShizishanorefield，ProvinceAbstractandfractionationTongling，AnhuiShizishanorefieldisthemos

2、trepresentativecopper—goldorefieldinTonglingoreclusterregionAnhuiProvince，andcontainsseveraltypesofcopperdepositsandgolddepositsCopperandgoldexitseparatelyorinparageneticinthedepositsCoppermineralizationandgoldmineraliza

3、tionexistedinassociationorfractionationeithertemporallyorspatiallyBasedonsystematiccollectingandcomprehensivelsummarizingofgeologicalcharacteristics，andgeochemicalfeaturesoffluidinclusionofcopperdepositsandgolddeposit，th

4、esolubilityofCu，AutransportationcomplexesspecieshasbeencalculatedaccordingtoobtainedthermodynamicparametersTherelationshipbetweenprecipitationofore—formingelementsandchangeofphysicochemicalconditionshasbeendiscussed，andt

5、hegeologicalprocessesresultinginthechangeofphyrsicochemicalconditionsofore—formingfluidhavealsobeendiscussedintheore—formingfluidsofShishanorefieldThemainconclusionsaredrawnasfollows：Complexesspeciesofcopperandgoldinoref

6、orminghydrothermalfluidswerebothchlorineandsulfideinShizishanorefieldThechangeofCuandAumigrationformsinthehydrothermalfluidsWascloselyrelatedtophysicochemicalconditionsoforeformingfluidThedominantCucomplexesspecieswereCu

7、CIuandCuCl2TheprocipitationofCuinoreformingfluidwasmainlycontrolledbytemperature，pH，y02，thesolubilityofCI’，andwasnotobviousrelatedtoEsThesolubilityofCudecreasedwithdecreasingtemperature，歸2，CI—andincreasingpHThemajorAucom

8、plexesspecieswereAu(HS)fandchlorinecomplexesspecieswasnotimportantThesolubilityofAuwascloselyrelatedtotemperature，y02，pH，∑S，andnotC1‘Audecreasedwithdecreasingtemperature，EsandincreasingpHWhenthefluidWasalkalescent(pH=7)，

9、thesolubilityofAuwaslagestChangesofphysicochemicalconditionsholdthekeytotheassociationandfractionationbetweencopperandgoldinore—forminghydrothermalsolutionsThegreatdifferencebetweencopperandgoldinsolublespeciesandmineral

10、solubilityrespondeddistinctlytophysicochemicalconditionsandtedtOtheirprecipitationsatdifferentperiodofmineralizationandlocalitiesduringh、’drothermalevolutionKeywords：associationandfractionation：migrationtbrmthermodynamic