花岗岩分类问题研究现状-庞迎春

第23卷第2期2009年　4月资源环境与工程ResourcesEnvironmentEngineeringVol.23,No.2Apr.,2009:2008-11-26;:2008-12-16:(1984-),,,:。E-mail:[e-mail]庞迎春1,程顺波2(1.中国地质大学资源学院,湖北武汉　430074;2.宜昌地质矿产研究所,湖北宜昌　443003)　:花岗岩类的分类问题是花岗岩研究的重要方面,主要介绍了国际地科联推荐的矿物学—岩石学基本分类、I-S-M-A分类、Barbarin的综合性分类,以及Frost等的地球化学分类。矿物学—岩石学分类不涉及成因信息,比较适用于野外工作以及最基本的岩石学研究;ISMA分类的标准反映的是岩浆源区和构造环境,自提出后备受重视,尤其是A型花岗岩的研究成果近来大量涌现;Barbarin的综合性分类包含了矿物学、岩石学和岩浆源区的信息,也受到一定的推崇;Frost的地球化学分类标准统一,具有很强的操作性。花岗岩类的各种分类标准都有其存在的合理性,也有其不足,需要更多深入的研究,未来的研究趋势是综合矿物学、岩石学、地球化学、大地构造环境等因素的综合性分类。:花岗岩类;分类问题;研究现状:P588.12+1　　　　:A　　　　:1671-1211(2009)02-0119-040　。、,。。,20。—I-S-M-A。,,Barbarin(1999)[1]、Frostetal(2001)[2]。,。1　—(、、),QAP[3](1)。QAP,(ManiarPiccoli,1989[4]),11～9,2,。(),、、,。,,,。1　QAP(M90%)(LeMaitreIUGS,20022.4[3])Fig.1　QAPdiagramforclassificationofgranitoidrocks(AfterLaMaitreIUGS,2002Table2.4)1.;2.;2-1.;2-2.;3.;4.;5.;6.;7.;8.;9.。,(、)。,(、),。2　I-S-M-AI-S-M-A,,,。I-S-M-AISChappellWhite(1974)[5]Lachlan,1。,S(),;I,、。IS()()。ChappellWhite,IS,。,,[7]。1　IS(ChappellWhite,1974,ChappellWhite,2001[6])Table1　DistinctivepropertiesforIandS-typegraniteISNa,Na2O3.2%,2.2%Na,K2O5%,Na2O3.2%,K2O2%,Na2O2.2%Mol.Al2O3/(Na2O+K2O+CaO)1.1Mol.Al2O3/(Na2O+K2O+CaO)1.1CIPW1%CIPW1%SiO2;　　I-S-M-A(MA)White(1979)[8]LoiselleWones(1979)[9]:M,A、。M,,(LeMaitreIUGS,2002,P106)。M,I,M,Frostetal(2001)M,,(Tate,1999[10])、(FrostFrost,1997[11])(Barker,1975[12])。A,。:;,CaOAl2O3,Fe/(Fe+Mg),K2O/Na2OK2O;、,,(LeMaitreIUGS,2002,P49)。AFe/Mg、(K+Na)/Al、K/NaZr、Nb、Ga、Ga/Al、YCe,CaOSr;AI、SGa/AlY、Ce、Nb、Zr。Whalen(1987)[13]Peareetal(1984)[14],,A(Whalen,1987,Fig.7A,B)。A,Whalen(1987)AFCl,,。,A,,。ABonin(2007)Lithos97[15]。I-S-M-A,120资源环境与工程　　2009年　。IS,M,A,。I、S,;M,,;,A,。I-S-M-A。Pitcher(1983)[16],I-S-M-A,5(1):(1)M———;(2)I()———;(3)I()———;(4)S———(),;(5)A———,,。Castroetal(1991)[17]I-S-M———H。HIS,。,HISM。S、Hs、Hss、HmM。,,,IM。Chappelletal(1998[18],2004[19]),I,,S。,,,。3　3.1　BarbarinBarbarin(1999):,,,。,,。:①(MPG);②(CPG);③(KCG);④(ACG);⑤(ATG);⑥(RTG);⑦(PAG)。Barbarin、,,,,,,、。,,。3.2　FrostFrostetal(2001)(Fe＊、MALIASI)。:Fe＊=FeOtot/(FeOtot+MgO)(Fe#=FeO/(FeO+MgO)),MALI(modifiedalkali-limeindex)=Na2O+K2O-CaO,ASI(aluminumsaturatioinindex)=Al/(Ca-1.67P+Na+K)。Fe#。MALI、、、,ASI、。,,16。,,;A,,,;,121第2期庞迎春等:花岗岩分类问题研究现状SiO270%,Si;,MALI—。,,。。4　,,(Pearce,1984;ManiarPiccoli,1989;Barbarin,1990[20];Pearce,1996[21]Ishihara,1977[22])—。(,1982[23];1983[24]),、、,。,。,、、。、、,,。:[1]　BarbarinB.Areviewoftherelationshipsbetweengranitoidtypes,theiroriginsandtheirgeodynamicenvironments[J].Lithos,1999,46:605-626.[2]　FrostBR,BarnesCG,CollinsWJ,etal..Ageochemicalclassificationforgraniticrocks[J].JournalofPetrology,2001,42:2033-2048.[3]　LeMaitreRW,InternationalUnionofGeologicalSciences(IUGS).Ig-neousRocks:AClassificationandGlossaryofTerms,2ededition[M].CambridgeUniversityPress,UK.2002:236.[4]　ManiarPD,PiccoliPM.Tectonicdiscriminationofgranitoids[J].Ge-ologicalSocietyofAmericaButtetin,1989,101:635-643.[5]　ChappellBW,WhilteAJR.Twocontrastinggranitetypes[J].PacificGeology,1974,8:173-174.[6]　ChappellBW,WhilteAJR.Twocontrastinggranitetypes:25yearslat-er[J].AustralianJournalofEarthSciences,2001,48:489-499.[7]　MillerCF.Arestronglyperaluminousmagmasderivedfrompoliticsedi-mentarysource?[J].JournalofGeology,1985,93:643-673.[8]　WhiteAJR.Sourcesofgranitemagmas[J].GeologicalSocietyofA-merica,AbstractswithPrograms,1979,11:539.[9]　LoiselleMC,WonesDS.Characteristicsandoriginofanorogenicgranites[J].GeologicalSocietyofAmerican,AbstratswithPrograms,1979,11:468.[10]　TateMC,NormanMD,JohnsonSE,etal..GenerationoftonaliteandtrondhjemitebysubvolcanicfractionationandpatialmeltingintheZarzaintrusivecomplex,westernPeninsularRangesBatholith,north-westernMexicon[J].JournalofPetrology,1999,40:983-1010.[11]　FrostCD,FrostBR.High-K,iron-enrichedrapakivi-typegranites:thetholeiiteconnection[J].Geology,1997,25:647-650.[12]　BarkerF,WonesDR,SharpWN,etal.ThePikesPeakbatholith,Col-oradoFrontRangeandamodelfrotheoriginofgabbro-anorthosite-sy-enite-patassicgranitesuite[J].PrecambrianResearch,1975,2:97-160.[13]　WhalenJB,CurrieKL,ChappellBW.A-typegranites:Geochemicalcharacteristics,discriminationandpetrogenesis[J].ContributionstoMineralogyandPetrology,1987,95:407-419.[14]　PearceJA,HarrisNBW,TindleAG.Traceelementdiscriminationdi-agramsforthetectonicinterpretationofgraniticrocks[J].JournalofPetrology,1984,25:956-983.[15]　BoninB.A-typegranitesandrelatedrocks:evolutionofaconcept,problemsandprospects[J].Lithos,2007,97:1-29.[16]　PitcherWS.Granitetypeandtectonicenvironment.InHsǜ,KJ(ed.)MountainBuildingProcesses[M].London:AcademicPress,1983,19-40.[17]　CastroA,Moreno-VentasI,delaRosaJD.H-type(hydrid)granit-oids:aproposedrevisionofthegranite-typeclassificationandnomen-clature[J].Earth-ScienceReviews,1991,31:237-253.[18]　ChappellBW,BryantCJ,WybornD,etal.High-andlow-temperatureI-typegranites[J].ResourceGeology,1998,48:225-236.[19]　ChappellBW,WhiteAJR,WilliamsIS,etal.Low-andHigh-tempera-turegranites[J].TransactionsoftheRoyalSocietyofEdinburgh:EarthSciences,2004,95:125-140.[20]　BarbarinB.Granitoids:mainpetrogeneticclassificationsinrelationtooriginandtectonicsetting[J].Geo