中国红色粘土型金矿成矿特征

:100820244(2001)0220001208(,,550002)90,,:,;;;,,,:P588.24+1;P618.51:A,1980Boddington,[1]80[26],[710],[1114][1518],[19],[12,1719],-[20][21,22]()(),:2000-08-29;:2000-12-14:A(KZ-951-A1-404-02)(:49873021):(1973-),(),1996,1,,,,,,,,,,,,,(1)(1):(1)1,([23][24]SiO2,55%,Fe2O320%,(Bahia[25],Boddington[26]12001292Vol.29,No.2,2001GEOLOGY2GEOCHEMISTRY©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[27],SerradoPirocaua[28],LakeSonfon[29])SiO245%,Fe2O320%,Al2O335%,,1ASFFig.1.TrianglediagramofASFofthered2clay2typegolddepositsandlateritegolddeposits.(2),(),(),;(17m[30,26],30m[31]),:()()[1,3](3)(),,,,,,,,;,,,(4),,,,[4,9],()(),,,(5);,,,,,,(6),,(),[32](),,,,,[3335](7),,(,),(,),,,(8),,,22.1,[37][36],22001©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[18],510m,20,,59g/t;[18]26m,(),36g/t(1)(01m)(2)(,05m)(3)(,15m)(4)(,,05m)(5)2.11g/t(1)00.8m,,,,,0.5g/t[36](2)25m,,,56g/t(3)13m,,,0.51.2g/t(4)1.35g/t,1.83g/t(1),0.110-6(2),1310-6(3),(4),2010-6(5),(6)(1020m,4070m)[8,9,10]:(1)(2),0.210-6[37](3),0.310-6(4),0.510-6(5),0.110-624W(Au)2.0510-6(1)(2):,0.4510-6(3):,0.4510-6(4):(),5010-6(5):,,1.710-6(6):,,1.4310-6(1)(2):25m,Fe2O3,Al2O3,Mn,TiO2,,[25](3):100m,,(4):20m,,(5):40m,,,()(6):,(1),0.0710-6(2),0.1210-6[38](3),19.410-6(4),0.0510-6(5),0.0810-6(6)(1)13m,,(2),,(25m),310-6[37,39](3)(),(810m),3.510-6(4)(18m)(5)(15m),(),1996,(),199532:©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(2)[40],[41],,23Table2.Classificationofthered2clay2typegolddeposits,,,,(),,3[36][37][42]2.22.2.1,,,,,2.2.2,303031,,30,,,,[43],()();()()()33.1[4]:,,0.51g/t,,1.00g/t,0.159g/t[26],0.25g/t,1.49g/t[14],42001©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[44]3060%,3330,3.3,,,,,,;,,,,,,,3.4,,,,,,,,4,,,,Au,Au+Au3+,4.1[45],,,pH,:[Cl-]AuCl3(200):4Au+16Cl-+3O2+12H+4AuCl-4+6H2O[33],,,,:4Ag+4Cl-+O2+4H+4AgCl0+2H2O,Cl-H+O2,Fe2+Fe2+[Cl-],(100),,,:CaCO3+H2O=Ca++HCO-3+OH-,CaCO3,,S2O2-3[46]52:©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:2Au+4S2O2-3+H2O+1/2O2(g)=2Au(S2O3)3-2+2OH[46]4.2,,EhpH,Fe2+FeMn,,[26,41]:AuCl-4+3Fe2++6H2OAu0+3FeOOH+4Cl-+9H+Au(S2O3)2-2+Fe2++4H2O=Au+FeO(OH)+5H-+2SO2-4+2HS-Au(S2O3)2-2+Mn2++4H2O=Au+MnO(OH)+5H-+2SO2-4+2HS-3Au(SO4)-2+6Fe2++4H2O=3Au+2Fe2(SO4)3+2FeO(OH)+6H+Au(SO4)-2+Mn2++2H2O=Au+MnO(OH)+2SO2-4+3H-Fe2+,[41],pH,,()[1],1993,(3):2[2],,1993,1:1215[3],1995,1(4):67[4],,1996,2(3):2530[5],,1993,1[6],,1997,11(2):1523[7],,1999,18(2,3):7983[8],,1996,27(5):511515[9],,1996,27(5):511515[10],,1994,2:13[11],,1996(1):1[12],1997,(3):14[13],,1999,8(3):171175[14],,1998,12(3):160166[15],,1998,7(3):156159[16],,1999,8(6):687688[17],,1997,(34):4353[18],,1996,2(4):1520[19],,1999,8(6):353358[20],,1998,12(5):329334[21],,1998,22(1):2730[22],,1984,230233[23],,1994,8(2):2533[24],,1999,16(4):30731462001©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[25]WeishengzangandWillamS.Fyfe,AThree2StageGeneticModelfortheIgarapeBahiaLateriticGoldDeposit.EconomicGeology,1993,88:17681779.[26]DavyR.AndEl2ansaryM.,GeochemicalpatternsinthelateriteprofileattheBoddingtongolddeposit,WesternAustrali2a.J.Geochem.Explor.1986,26:119144.[27]IbonGuimaraesCarvalhoetc.GeochemicalevolutionoflateritesfromtwoareasofthesemiaridregioninBahiaState,Brazil.J.Geochem.Explor.,1991,40:385411.[28]MarcondesLimadaCostaetc.,Applicationofmulti2elementgeochemistryintheAu2phosphate2bearinglateriticcrustsforidentificationoftheirparentrocks.J.Geochem.Explor.,1996,57:257272[29]DaviesT.C.etc.,GeochemistryandmineralogyoflateritesintheSulaMountainsgreenstonebelt,LakeSonfongolddis2trict,SierraLeone.J.Geochem.Explor.,1989,32:7598[30]DaCostaM.L.,GolddistributioninlateriticprofilesinSouthAmerican,AfricaandAustralia:Applicationtogeochemi2calexplorationintropicalregions.J.Geochem.Explor.,1993,37(13):143163.[31],,1996,(2):56[32],(9308),1995[33]MannA.W.,MobilityofGoldandSilverinLateriticWeaheringProfiles:SomeObservationsfromWesternAustralia.E2conomicGeology,1984,79:3849.[34]FressinetP.H.,MorphologyandgeochemistryofgoldgrainsinlateriticprofilesofsouthernMali.J.Geochem.Ex2plor.,1989,32(1):1732.[35]FabriceColinetal.,Gold:Atracerofthedynamicsoftropicallaterites.Geology,1997,25(1):8184[36],,1998,17(1):5054[37],,1996,10(2):7380[38],,:,1995,56[39],,1996,(3):1114[40],,,,1999,35(3):1416[41],,1998,4(2):2731[42],,1999,8(6):546550[43],,1995,12(2):91184[44],,1999,8(3):153159[45],,1995(4):308313[46],,1996,10(6):380387CHARACTERSOFMINERALIZATIONOFTHERED2CLAY2TYPEGOLDDEPOSITSINCHINARaoWenbuoGaoZhenminYangZhusenLuoTaiyiLiHongyang(InstituteofGeochemistry,ChineseAcademyofSciences,Guiyang550002)AbstractThered2clay2typegolddepositsinChinawerediscoveredintheearly1990sinSouthChina,especially72:©1994-2008ChinaAcademicJour