安徽铜陵冬瓜山大型铜矿_海底喷流_沉积与矽卡岩化叠加

85520115ACTAGEOLOGICASINICAVol.85No.5May2011:(407304194093041840234051)(20010103)(2006BAB01B01):2011-01-12;:2011-03-27;::,,1961,:100037,26,;:010-68990617;Email:[e-mail]:CNKI:11-1951/P.20110512.0827.003:2011-5-128:27:29::-侯增谦1),杨竹森2),吕庆田2),曾普胜2),谢玉玲3),蒙义峰2),田世洪2),徐文艺2),李红阳4),姜章平5),王训成5),姚孝德5)1),,100037;2),,,100037;3),,100082;4),,050031;5)321,,,244033:,,,--,+,-/0VMSSEDEX,,--,(137Ma):-,,;,,,-,80D34S0.5j~8.8j,D34S14.8j~20.5j,S:,D34S20.5j,S;,D34S1.3j~5.5j,S;,(D34S:4.4jy5.3jy5.7j),S-,:-,,-,,:;SEDEX;;,(Kesleretal.,1975)(Sawkins,1984)(Meinertetal.,1997)(VMS)-(SEDEX),,Ertsberg,-,7-,2570(Meinertetal.,1997)(,1991),,6(-),150O2011,,9360,100,1820O,,1810m,560m,32m,,,,,!1()()(1,PanYuanmingetal.,1999),(1),:-(,1996),,(,1991),,,,,(1)-,,(YinAnetal.,1993),(1)(Amesetal.,1993;CongBolinetal.,1994),,200~700m,-(1)(,1991),-(137Ma),--,(,1991)1Table1Majortectoniceventsandassociatedstructure,magmaandsedimentaryfaciesintheLower-middle-Yangtzemetallogenicbelt6605::-1(,2004)Fig.1Simplifiedgeologicalmapshowingtectonicevolution,magmaticintrusionsandoredepositsintheTonglingdistrict,Anhui(modifiedfromDengJunetal.,2004)(PanYuanmingetal.,1999);TLF)-;XGF)-;YCF)-SimplifiedtectonicframeworkanddistributionofpreciousandbasemetaldepositsintheLower-middle-Yangtzemetallogenicbelt(afterPanYuanmingetal.,1999);TLF)Tancheng-LujiangFault;XGF)Xinxian-GuangjiFault;YCF)Yichang-ChangzhouFault:¹Sedex(,1993;,1994;,1997;,2000),,,313~328Ma(,1986;,1995);º-,(,1995;HouZengqianetal.,2004);»,137?5Ma,(,1997;,1998)7(1),(,1991;,1992;1999;PanYuanmingetal.,1999)2180,21933,66120112(a)(b)(3211995)OFig.2Simplifiedgeologicalmap(a)andhorizontalprojectionmapoftheCuorebodiesofmajordeposits(b)intheShizishanorefield,Tongling,Anhui(modifiedfromGeologicalTeamNo.321ofBureauofGeologyandMineralExplorationofAnhui,1995)(1),6(2),:2.1:¹14m,;º46~68m,,()();»362~550m-,,;¼-,(2a),,,,2.2,3km2(2)6,152.9~135.8Ma(,1998);100~300m1000m,,6625::-6632011,I-(Ishihara,1981),(Reidetal.,1983;Zorpietal.,1991;Wilcox,1999)(2003)(Schmidt,1992),0.02~0.17GPa0.30~0.46GPa,0.8~6.3km11.1~16.9km,,,,(Tatsumi,1983;1986),(,2000;,2003)2.3,,(1)/S0,8km,22.5km,35b~45b,-,-,,2.46,,7km2(2b),2,:¹Cu(),(,1998),(,2005;,2008);ºCu(),,(,1998b;,2000);»Cu-Mo(),,(,2001);¼Cu-Pb-Zn(),,(,1997;,1998a;,2000),3140,9360,100,,I98%O3.1,-745~-1007m-,0.98km2,,,(34),1810m,34.2m,,30b~40b,75~545m;,35b~40b,10~460m,(34)/0,200~300m,4~6m,,,;1~4m;,(49)3.2-(510),:¹,º-,»-,¼,½-(1):-,,-(56),,,,0.7~7m,1%(5),--,(1.4%)(1.2%),VMSSedex6645::-3(3211995)OFig.3CombinedcrosssectionsoftheDongguashandeposit,Tongling,Anhui(modifiedfromGeologicalTeamNo.321ofBureauofGeologyandMineralExplorationofAnhui,1995)(Lambert,1976;Large,1981;HouZengqianetal.,2001;,2003),,,,(Lydon,1988;Large,1992)(2)-:,1810m,1km2(5~7),10.9m,32%,/0(7b)63~75,;34~46,;,(7b),:,----;,-,(6),(27%)(4%)(3%)(3%),()(),(3)-:,3,42%(6)0.9~30.7m,,-,,(6),VMS(,VMS,,1995;HouZengqianetal.,2001)7c,-:¹,,;º-,(5,7c),,,66520114(3211995)OFig.4PlanmapsatdifferentelevationlevelsintheDongguashandeposit,Tongling,Anhui(modifiedfromGeologicalTeamNo.321ofBureauofGeologyandMineralExplorationofAnhui,1995)(56%)(7%)(3%),(),,6665::-5(3211995)OFig.5ProjectedplanshowingthedistributionofdifferenttypesoforeintheDongguashandeposit,Tongling,Anhui(modifiedfromGeologicalTeamNo.321ofBureauofGeologyandMineralExplorationofAnhui,1995)66720116(3211995)OFig.6GeologicalsectionmapsshowingthedistributionofdifferenttypesoforeinthemainorebodyofDongguashandeposit,Tongling,Anhui(modifiedfromGeologicalTeamNo.321ofBureauofGeologyandMineralExplorationofAnhui,1995)(a))63;(b))58;(c))46(a))ExplorationlineofNo.63;(b))ExplorationlineofNo.58;(c))ExplorationlineofNo.466685::-7(3211995)OFig.7ThicknessisolinemapsofmainorebodyanddifferenttypesoforeinDongguashandeposit,Tongling,Anhui(modifiedfromGeologicalTeamNo.321ofBureauofGeologyandMineralExplorationofAnhui,1995)(a));(b))-;(c))-;(d))-(a))Mainorebody;(b))Cupyrite-serpentinesheet;(c))Cupyrrhotite-pyritelens;(d))Cumagnetite-skarnlens6692011(4):,,,,3%,-(5):(),()(5)-:(15%)(7d),(6):¹,º,,,(6%3%5%)()(5),,,(67%),,3.3,,,,,(8a)-,1~5mm,,;,,,+++++-,,(8e),,,,,,VMSSedex(Pisutha-Arnondetal.,1983;Eldridgeetal.,1983),(8b),,(,1994;,1997)2~5mm,20~40cm,-,(8f),-:,(8c);,/0,,,(8d),-:yy,6705::-8Fig.8ScanimagesandphotomicrographsofthetextureandstructureoforeinDongguashandeposit,Tongling,Anhui(a))(Sul)()+(Ser+Ta);(b))(c-Py),(Py)(Ga);(c))(c-Py)(Py)(f-Py);(d))(Pr)(Py);(e))(Sul)+(Ser+Ta),;(f)),(a))Scanimageshowinglaminaesofsulfide(Sul)(composedmainlyofpyriteandpyrrhotitewithminorchalcopyrite)andserpentineandtalc(Ser+Ta);(b))Photomicrographshowingstrawberry-likecolloidalpyrite(c-Py),replacedbypyrite(Py)andgalena(Ga)alongshrinkagecrack;(c))Scanimageshowingporphyroblasticcoarse-grainpyrite(Py)withfine-grainpyrite(f-Py)aggregaterimincolloidalpyrite(c-Py)matrix;(d))Photomicrographshowingrelictpyrite(Py)inpyrrhotite(Po)aggregate;(e))Scanimageshowingcrumpledlaminaesofsulfide(Sul)andserpentineandtalc(Ser+Ta),andthickenedlaminaesofsulfideatthecoreoffold;(f))Photographofconglomerateore,s