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1,1,1,1,2,2(1.,710054;2.,741020):,,;An6.6812,,,,,;,:;;;;:P588.12+.1:A:1007-6956(2004)02-0086-06:2003-11-07:(85-01-018-06):(1963-),,,,,,Email:xaszhongbao@cgs.gov.cn..1/5,1991.1,[1],,[24],22.1,,56km2,,,,,(1)8km2,,(1)2.2,,,;,(,5mm)(0.5mm),;0.24.5mm,1.5mm;,30%50%,,,0.22.4mm,,1/3,,,,,1%3%1%,,,27220046GEOLOGICALSURVEYANDRESEARCHVol.27No.2Jun.2004©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1Fig.1GeologicalsketchofgranitesinChaijiazhuangandJiuciliang,westQinlingRange1.(Q);2.(K);3.(D);4.(Z);5.(Pt1qn);6.;7.;8.;9.;10.;11.;12.,,,,,,,0.23.5mm,0.62.0mm,,,,35%,30%,,,,,-,,2.3(1),,SiO2Na2OK2OFeOTiO2NiO;Al2O3CaOMnOCr2O3(93ch-15,SiO2,),,,An=6.68,Ab=92.50,Or=0.82;An=12.00,Ab=87.82,Or=0.17,An6.68()12.00(),An6.6812,,33.12,,SiO2,SiO272.23%,SiO275.09%,[5],SiO2K2O,TiO2FeO1(%)Table1Themicroprobeanalysisdataoftheplagioclases(%)SiO2TiO2Al2O3FeOMnOMgOCaONa2OK2OCr2O3NiO93ch-766.070.7220.760.130.020.002.0111.010.000.000.00100.7393ch-1567.950.0019.520.060.000.041.0511.290.020.050.04100.1993ch-2266.770.0020.220.110.000.012.5410.550.000.050.01100.2793ch-2366.180.3420.490.080.000.030.8811.190.300.020.0699.5893ch-2664.580.0222.600.050.030.022.639.170.100.000.0099.2093ch-2965.460.8720.330.050.030.042.5011.320.000.000.00100.5966.100.5320.630.110.010.021.4511.100.150.010.03100.1465.600.3021.050.070.020.022.5610.350.030.020.00100.02782:©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2(%)Table2Thepetrochemistrycompositionofthetwogranites(%)SiO2TiO2Al2O3Fe2O3FeOMnOMgOCaONa2OK2OP2O3Cr2O3NiOH2O+93ch772.550.6113.840.910.031.100.170.670.911.060.074.254.090.0799.4293ch1269.920.6215.471.450.041.410.200.351.451.410.093.934.180.0999.1693ch2272.370.1015.290.750.021.100.070.400.750.460.064.214.290.0199.1393ch2974.060.1014.090.680.020.300.030.200.681.190.043.494.840.0199.0593DMZ175.090.2114.020.620.010.200.070.520.620.670.063.914.590.05100.02.1/5,1991.MnOMgOCaONa2OP2O5,TiO2FeOMgOCaO,(Fe2O3/Fe2O3+FeO)0.70,(Fe2O3/Fe2O3+FeO)0.542.372.25,;1.101.173.2(1991),Pb,CuZn;;As6,,PbZn,AuAs,AsAu,;Ti7,;Ag10,,PbZn3.33,105.0510-6,100.4510-6;100.8610-6,4.1910-6,LREE/HREE24.07;95.5610-6,4.8910-6,LREE/HREE19.54;Eu0.95,,,(2)2Fig.2Thechondritrite-normalizedREEpatternsofREEfromthegranites3(10-6)Table3Thecompositionofrareearthelements(10-6)LaCeNdSmEuGdTbHoTmYbLu432.0049.5815.602.850.832.380.360.380.140.790.14105.05126.8046.4018.502.970.892.670.420.490.170.990.15100.458827©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.3Rb-SrFig.3Rb-Srdiagramofdifferentgranites,.,1990.3.4[6],Au5.1310-9,;(1990),0.5410-6,,,Au,AuAgPbZn3.53.5.1..A.M.[7]:,(),;(),;RbSrBa,BaSr,Rb,;Rb,Rb-Sr,EuRbSrRbSr3,,Eu=0.7,Eu0.95,,3.5.2Na2O-K2O,ISI,SNa2O-K2O44Na2OK2OFig.4Na2OK2OdiagramofthegranitesS,S4,,,[6]::(),:(511m),(515),982:©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.(154218,181.5),,(520m)(520),(134200,165.3):(/1116)(NaCl2.6%7.3%,6.0%)(/1115)(NaCl3.5%6.7%,5.8%),BiAu,Au0.853,0.547,,Bi(278.3),AuAsCu,Bi,[3],,,(),,,(307308Ma)[2],,,,;[3](60.54),,(),,(5808)Ma[8],5,3:(1)An,An6.6812,,(2);0.6990.544;2.3682.251;1.101.17;;,Eu0.95,(,307308Ma;,(5808)Ma,(3);[28],,,[3];,:[1],,,.[J].,1997,13(1):71-84.[2],,,.[J].,1996,5(2):96-97.[3],,,.[J].,1994,12(4):294-303.[4],,,.-[M].:,1994.[5],.[M].:,1988.[6].[J].,1994,3(2):53-63.[7]..,A.M..[J]..,1994,1:22-28.[8],,,.[J].,1996,36(2):6-10.0927©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.LithogeochemicalCharactersofChaijiazhuangandJiuciliangGranitesinWestQilingMts.andItsRelationtotheMineralsSONGZhongbao1,FENGYimin1,HEShiping1,HEFang1,LIZengqing2,ZHAOLili2(1.XianInstituteofGeologyandMineralResources,Xian710054;2.No.1GeologyExplorationParty,BGMR,Gansu741020)Abstract:TheChaijiazhuangandJiuciliangadamelitegranitesaretwotypicalgranitesinwesternpartofQinlingMts.ThelithogeochemicalcharacteristicsindicatethatthetwogranitesareSirich,alkalislightrichandAloversaturation,belongingtothealkaliseriesgranite.TheelectronmicroprobeanalysisofplagioclaseshowsthattheirAnsarefrom6.6812,andbelongtoalbiteandoligocase.Magmaticevolutionoftheintrusionisnotclear.TheREEspiderdiagrampatternsareLREErichpatternswithoutEudepletion.Inaword,bothgraniteshavesimilarlithogeochemicalcharacteris2tics.Buttheyarentfromthesameparentmagmabecausethereisalongtimebetweentheirforma2tions.ChaijiazhuanggranitemightprovidepartialoreformingmineralfortheChaijiazhuangAude2positebutnottheheatenergysource.TheJiucilianggranitemightnotprovidetheoreformingmate2rialortheheatsource.Keywords:Chaijiazhuanggranite;Jiucilianggranite;geochemistry;goldore;westQilingMts.192:©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.