滇西上芒岗红色粘土型金矿常量元素地球化学

:2002208211:(49873021);A(KZ29512A12405202):100024734(2003)02201692081,2,1,1,1,3,1,4,1,5(1.,550002;2.,100039;3.,100037;4.,050031;5.,,650051):,K2OFe2O3Al2O3,,;SiO2K2OFe2O3Al2O3;,,,,:;;;:P595;P618.51:A:,,1973,,.2090[1],()(),[2,3],[4][510][11],,,137km,NE(1)20km,100300m,,,,,,,,,7km,,2,2030m,,,,:(1):1m,23220036ACTAMINERALOGICASINICAVol.23.No.2Jun.,20031.2.3.4.5.6.7.8.9.10.11.12.13......1()Fig.1.GeologicalsketchmapoftheShangmangganggoldoredistrict.(2):48m,,(3)2:04m,,20%5%,(4):28m,20%30%,,,10%,,30%,10%20%(5):8m,12m,40%,,,10%,0.11mm,(6):(),,22.1,:5m,(21.5)m0.1m0.05m2,,1kg,7;190712003,0.149mm,2.2(1):(S111S112S113S114S115S116),150g,[12]5:900m,150900m,76150m,276m2m(2):,(2m)(3)X:D/Max22200X,0.02,60%,1%,CuK,1,0115mm;:68/min;0.020.04;40kV,20mA;227031900m,(S113),150900m,276m76150m,900m2m,,2,,,1Table1.Distributionofdifferentgrainfractionsinredclay%900m900150m15076m762m2mpH/S11613.66713.5338.40047.46715.6671.2665.2211.1S11514.10019.1279.80039.13317.84006.1711.3S11414.96716.6678.55332.05326.5071.2507.0511.2S11361.3678.1335.64717.0477.0930.7136.7311.1S11218.06712.9876.87340.48721.0400.5466.4710.6S11115.93313.1006.07343.94020.2130.7416.5410.5:100gX,()X2m(2),,,2(2m)Table2.Mineralcompositionandcontentsofclay2sizedfractions(2m)fromtheGuanglingporun,Shangmanggang%IKQBMAbGoOrHyChAnS11928.8423.471.557.9611.539.001.734.73S11834.3816.9618.7313.0910.221.445.18S11735.3518.587.723.7811.8017.125.66S11642.8020.176.9413.326.952.692.934.20S11536.7822.5211.0613.098.134.234.19S11436.7925.3112.2411.975.463.514.67S11363.0316.993.329.047.61S11237.9533.9017.227.754.022.173.98S11131.2535.337.494.754.7910.156.21:I,K,Q,B,M,Ab,Go,Or,Hy,Ch,An;XRD.(3),900m,,(900m),[13],;,1712:3Table3.ChemicalcompositionandgoldcontentofredclayintheShangmanggangred2claytypegolddepositinthewestofYunnan%SiO2FeOFe2O3Al2O3CaOMgOTiO2MnOK2ONa2OH2OTotalw(Au)/10-6S11963.950.086.5217.300.0010.600.450.232.010.107.5398.770.50S11870.230.075.7315.100.200.700.330.052.190.094.4699.160.56S11764.190.016.7018.470.0010.500.320.232.270.166.3299.170.93S11665.470.607.5515.370.380.600.750.202.640.145.4299.120.65S11563.232.407.9714.530.420.610.690.432.230.187.9498.470.45S11459.950.986.7715.930.410.690.740.172.230.209.9097.970.45S11333.450.9519.0923.730.410.730.800.0585.480.1013.998.7050.00S11263.690.718.3816.080.410.590.690.172.410.135.7999.051.17S11163.660.539.1715.470.420.480.840.0781.830.206.1698.841.4368.350.297.3311.201.111.310.700.012.250.065.1798.458.010.640.891.3329.2217.720.040.060.170.141.8659.8276.640.182.7912.950.150.450.550.022.460.163.1399.12:7;,11;,8;.2Fig.2.Variationsincontentsofmajorelementsandgoldwithdepth(m)intheprofile.4(3),w(SiO2+Al2O3+Fe2O3)80%;w(TiO2)w(MnO)1%;FeO;K2O,MgOCaO,Na2O,,,(2),,w(Fe2O3)w(Al2O3)w(K2O+Na2O),,;w(SiO2)Fe2O3,Al2O3,K2O+Na2O,,w(SiO2);,,,,w(K2O),2w(TiO2);w(MgO+CaO),;MnO,,w(CaO)w(MgO)w(FeO)w(TiO2);227120033712:TiO2Al2O3,r=010878,,TiO2Al2O3,TiO2Al2O3[14],6.2,(32)Al2O3Fe2O3Au,SiO2,,,,R(3),K2O0.9774,;,AuFe2O3Al2O30.95930.8877,Fe2O3Al2O3,,7n(SiO2)/n(Al2O3)n(Al2O3)/n(Fe2O3)n(Fe2+)/n(Fe3+)(5)5Table5.Characteristicparametersforthechemicalcompositionofredclayn(SiO2)/n(Al2O3)n(Al2O3)/n(Fe2O3)n(Fe2+)/n(Fe3+)S11928.0395.0676.2844.1620.014S11825.4676.3677.9074.1340.012S11727.2585.7695.9084.3240.007S11622.4915.5147.2413.1930.088S11521.3435.5537.3982.8590.338S11419.3945.0346.3983.6910.161S1136.5221.5842.3961.9500.055S11225.1425.0546.7333.0100.094S11121.3195.0776.9962.6460.064:=n(SiO2)/n(K2O+Na2O+CaO+MgO),=n(SiO2)/n(Al2O3+Fe2O3).:,,,()1.5,,5,,,:,(),;(),n(SiO2)/n(Al2O3)n(Al2O3)/n(Fe2O3):4712003,n(SiO2)/n(Al2O3),5.908,,n(Al2O3)/n(Fe2O3)1.9504.324,,,n(Fe2+)/n(Fe3+):,n(Fe2+)/n(Fe3+),0.338,,,;,n(Fe2+)/n(Fe3+),(5)n(Fe2+)/n(Fe3+)2,;,,2,,:,,,7%,,(1),KNaCaMg,AlFeMnTi;,,,,pH5.227.05(1),[1518],Fe2+Mn2+Au0,Fe2+Mn2+[1921],,,,,,,,,SiO2,n(SiO2)/n(Al2O3)2[22](4),,:[1],,.[J].,2000,28(4):1217.[2].[J].,1993,1:1215.[3].[J].,1994,13(1):2837.[4].[J].,1999,16(4):307314.[5]DavyR.AndEl2ansaryM.Geochemicalpatternsinthelateriteprofileattheboddingtongolddeposit,westernAustralia[J].J.Geochem.Explor.1986,26:119144.[6]DaCostaML.GolddistributioninlateriticprofilesinSouthAmerican,AfricaandAustralia:Applicationtogeochemicalexplorationintropicalre2gions[J].J.Geochem.Explor.1993,37(1-3):143163.[7]DaviesTC,etal.GeochemistryandmineralogyoflateritesintheSulaMountainsgreenstonebelt,LakeSonfongolddistrict,SierraLeone[J].J.Geochem.Explor,1989,32:798.[8]WeiSheng2zangandFyfeWS.Athree2stagegeneticmodelfortheIgarapeBahiaLateriticGoldDeposit[J].EconomicGeology,1993,88:17681779.[9]PortoCGandHaleM.GoldredistributioninthestonelinelateriticprofileofthePossedeposit,centralBrail[J].Econ.Geol.,1995,90:308321.[10]DaCostaML,etal.Applicationofmulti2elementgeochemistryintheAu2phosphate2bearinglateriticcrustsforidentificationoftheirparentrocks[J].JGeochem.Explor,1996,57:257272.[11],,,.[J].,2001,29(2):17.5712:[12],.[M].:,1990.[13].[J].,1998,12(3):160166.[14],,,.[M].:,1995.56.[15]MannAW.Mobilityofgoldandsilverinlateriticweaheringprofiles:someobservationsfromwesternAustralia[J].EconomicGeology,1984,79:3849.[16]MillerAD