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1 ~486 ACTA GEOLOGICASINICA Vol.89No Mar.473~486 1 ), 1 ), 2 ), 1 ) 1),, 1 ), 3 ) 1),,100037; 2),,831100; 3),, :,, SIMS U-Pb,,SiO % ~61.34%,K2O 3.01%~3.20%,A/CNK 0.89~0.94, I ;, Eu (δeu=0.56~0.59), Rb K Th, Ba Ta Nb Ti SIMS U-Pb, 227.6±2.3 Ma(n=16,MSWD=0.02),,,, :Ⅰ ; ;SIMS U-Pb ; ;, , ,? :Pb+Zn t, Ag 300 (,2009),,, t, ( ) Cu t 2013, ZK m, ( ), 1.75%, 7.73%, 9.93m (,2010,, ZK m 2012) 4 : 6.77m - - -, (Cu 8.64%, 1.59%,Pb 17.01%,Zn 4.55%,Ag, g/t,TFe 31%),, (,2010), 4600m,,, (, ;,2008;,2010;,2011; 1/20 Pb+Zn,2013),,,, : ( : ) ( : ) ( :201309) ( :201112) : ; : ; : :,,1989 zhoujianhou1989@163.com

2 474 htp:// 2015, - SIMS U-Pb,,,, NW NE, EW SN, 1, NW,, NW -,,,, ( 1a,,, 2008), (,2005;,,2008;,2010;,2011;, 2013) : ( ) (Pt 1b) (Jxl) (T 3e), (Jxl) PbZn, - ( ) (Pt 1b) NW, NE :,, -, - - 2,,, ( (T 3e) 1b), (Jxl ),,, ( 2),, 9cm 6cm, (Jxl),,, (40%~50%) (20% ~25%) (15%, ~20%) ( 5%) ( 5%),, SIMS U-Pb ( ), SIMSU-Pb (WB17) ZK8702 :E ,N ;, 425m,, (WB17 ( ) - WB18 WB19), 5,, 1 250m, 58%, 4, SIMS U-Pb 160m, 38% CAMECAIMS-1280 (Jxl), (SIMS), LiXianhua, (2009) : ( ) (Pt 1b), Plésovice, (T 3e) (Slámaetal.,2008) ( ), Qinghu (LiXianhua,2009),,

3 : 475 1 (a) (b) (,2008;,2005 ) Fig.1 RegionaltectonicsketchmapofXinjiangQimantageandadjacentarea(a)andsketchgeologicalmapofWeibao CU-Pb-Zn-polymetalicdeposit(b)(AfterLiRongsheetal.

3 3 : (a) (b) (,2008;,2005 ) Fig.1 RegionaltectonicsketchmapofXinjiangQimantageandadjacentarea(a)andsketchgeologicalmapofWeibao CU-Pb-Zn-polymetalicdeposit(b)(AfterLiRongsheetal.,2008;Pan Weiliangetal.,2005;respectively) 1 ;2 ;3 ;4 ;5 ;6 ;7 ; 8 ;9 ;10 ;11,12 Ⅰ Tarimbasin;Ⅱ northarkin-dunhuangblock;Ⅲ Arkinorogenicbelt:Ⅲ-1 Hongliugou-Lapeiquanophioliticmélangebelt,Ⅲ-2 Mid- Arkinmassif,Ⅲ-3 Apa-MangyaearlyPaleozoicophioliticmélangebelt;Ⅳ eastkunlundomain:Ⅳ-1 northernkunlun (Qimantage)early Paleozoicarc,Ⅳ-2 Mid-Kunlun microcontinent,Ⅳ-3 southernkunlunaccretionarycomplex;Ⅴ Bayankalafoldbelt;Ⅵ Qaidam basin; Ⅶ Qilianorogenicbelt.Thicklinesarefaultanddeformationzones,anddashedlinesareinferredfaultstructures;1 northarkindeformation zone,2 southarkindeformationzone,3 north Kunlunfault,4 Heishan-Nalinggelefault,5 Baiganhudeformationzone,6 Mid- Kunlunfault,7 southkunlundeformationzone,8 faultdefiningthenorthernboundaryoftheqaidambasin;1 Quaternary;2 Eocene; 3 UpperTriassicElashanFormation;4 JixianianSystem LayashanFormation;5 PalaeoproterozoicBaishaheFormation;6 syenogranite; 7 granodiorite;8 unconformitysymbol;9 fault;10 layeroccurrence;11 deposit;12 samplelocation,,u (U= , Wiedenbecketal.,1995), (1SD=1.5%,Lietal., 1/3 U-Th-Pb 2009) Plésovice (337Ma,Slámaetal.,2008), Qinghu(159.5Ma,LiXinhuaet

476 htp://www.geojournals.cn/dzxb/ch/index.aspx 2015 2 ( ) Fig.

4 476 htp:// ( ) Fig.2 Fieldandmicroscopicphotos(orthogonalpolarization)ofgranodioritefrom thenorthwestofweibaodeposit,xinjiangqimantage (a~b) ;(c~d) (Pl) ; (Hb), (Mag),d, ; (Bt) ; (Or), (Qz) :Bt,Hb,Mag,Or,Oz (a~b) Thegranodioritewithrotatedelipticalmafic microgranularenclaves;(c~d) polysynthetictwinningandoscilatoryzoningof plagioclase;hornblendewithhornblende-typecleavagecontainingmagnetiteandzirconmicrocrystal,hornblendeinfig.2dshowingansimple twinningwherethetwinninglamelaeisparaleltothelongdiagonalofthehornblenderhombuscrystal.theeminentcleavageofbiotite; Carlsbadtwinningoforthoclase;Thequartzoccurringasanhedralcrystalinthemineralinterstice.Symbolsforminerals:Bt biotite;hb- hornbende;mag magnetite;or orthoclase;oz quartz al.,2009) Pb 204 Pb, Pb,, Pb, Pb 80~250μm, (Staceyetal.,1975) Pb WB17 ISOPLOT (Ludwig, 16, 16, 2003), 1σ, ( 3), 1,, 206 Pb/ 238 U, 206 Pb/ 238 U 4 WB U 232 Th % 10-6 ~ ~ , 232 Th/ 238 U 0.37~0.59, >0.4,, U Th Th/U (, BHVO-1,AGV-1 G ), Pb/ 238 U, XRF, 5%; 218.5~237.9Ma, 227.7±3.1Ma, ICP-MS, 5%~10% 3 SIMS U-Pb U-Pb,

5 3 : 477 Fig (CL) ( U-Pb, 1) CL images of zircons of granodiorite from the northwestofweibaodeposit,xinjiangqimantage(thecircle andthenumberwithinitrepresentstheanalysisspot,the numberisthesamewithtable1) ±2.3 Ma(n=16,MSWD=0.02),,, ,3 SiO % ~61.34%, 61.04%,, K 2O 3.01% ~3.20%, 2.04 ~2.09,, SiO 2-K 2O ( 5a),3, (Na 2O+ K 2O) 6.20% ~6.23%, 6.22%, K 2O/Na 2O 0.93~1.07,Al 2 O %~15.10%,A/CNK A/NK 0.89~ ~1.40, , ( 5b) 2,3 REE ( ~ ); LREE/HREE 6.60~6.69, (La/Yb) N 6.85~7.08,LREE,HREE,LREE,(La/Sm) N 1 SIMS U-Pb Table1 SIMSzirconU-PbdataforgranodioritefromthenorthwestofWeibaodeposit,XinjiangQimantage ( 10-6 ) ±1σ (Ma)±1σ Pb Th U Th /U 207 Pb/ 206 Pb 1σ 207 Pb/ 235 U 1σ 206 Pb/ 238 U 1σ 207 Pb/ Pb 1σ Pb/ U 1σ Pb/ 238 U 1σ WB17@ WB17@ WB17@ WB17@ WB17@ WB17@ WB17@ WB17@ WB17@ WB17@ WB17@ WB17@ WB17@ WB17@ WB17@ WB17@

6 478 htp:// U-Pb (a) (b) Fig.4 DiagramsofzirconU-Pbconcordia(a)andweightedaverageages(b) ofgranodioritefromthenorthwestofweibaodeposit,xinjiangqimantage 5 (a Richwood,1989) Fig.5 MajorelementfeatureofgranodioritefromthenorthwestofWeibaodeposit,XinjiangQimantage (Fig.5aafterRichwood,1989) 3.06~3.16, (2007) ( 6), δeu = 0.56~0.59, (,2001) 4, 228.3±0.5 Ma (,,2012) ;, ( 7), Th ( 8) Rb K, Ba Ta Nb Ti, P, 3,, ,, SIMP

7 3 : (%) ( 10-6 ) Table2 Major(%),REEandtraceelementcontents( 10-6 )andparametersofthegranodiorite fromthenorthwestofweibaodeposit,xinjiangqimantage WB17 WB18 WB19 WB17 WB18 WB19 SiO LREE TiO HREE Al2O LREE/HREE TFe2O (La/Yb) N MnO δeu MgO δce CaO Li Na2O Be K2O Sc P2O V LOI Cr Co K2O+Na2O Ni K2O/Na2O Cu σ Zn A/CNK Ga A/NK Ge La Rb Ce Sr Pr Y Nd Zr Sm Nb Eu Cs Gd Ba Tb Hf Dy Ta Ho Pb Er Th Tm U Yb *Ga/Al Lu Ce+Zr+Y+Nb ΣREE T( ) :K2O/Na2O, ;A/CNK=Al2O3/(CaO+Na2O+K2O), ;A/NK=Al2O3/(Na2O+K2O), ;T, Watsonetal.,1983;Mileretal.,2003:TZr=12900/[ M +ln(496000/zrmelt)],,m = (Na+K+ 2Ca)/(Al Si), ;Zrmelt Zr,T (K) U-Pb ±2.3 Ma(n=16,MSWD=0.02), (220±1Ma,,2012),, U-Pb (224±1Ma,, U-Pb,2014), (242±6Ma,LiuChengdongetal.,2004), 242~204Ma, U-Pb (204±3Ma, - -,2006), U-Pb - (,2007) (215±5Ma,,2007), 5.2 U-Pb (224±2Ma,,2008), U-Pb (218±2Ma, 4,,2011),, U-Pb (228±1Ma,234±1Ma,, 2012), U-Pb (228± 1Ma,,2012), U-Pb S I A M I ( 2);,SiO 2

8 480 htp:// Fig.6 Chondrite-normalized REE paterns for the granodioritefromthenorthwestofweibaodeposit,xinjiang Qimantage 1 (WB17,WB18,WB19);2 ~ 5,,2001;6,,2012; Sun & Mcdonough,1989 Sun & Mcdonough, Thegranodioritesamplesinthisarticle(WB17,WB18,WB19); 1 Thegranodioritesamplesinthisarticle(WB17,WB18,WB19); 2~ 5 respectivelyrepresentsandesite,trachydacite,daciteand 2~ 5 respectivelyrepresentsandesite,trachydacite,daciteand rhyolitesamplesin Elashan Formationfrom Liu Hongtao,2001; rhyolitesamplesin Elashan Formationfrom Liu Hongtao,2001; compositionsofprimitivemantlefromsunetal., Galingequartz monzodioritefrom Gao Yongbaoetal,2012; compositionsofchondritefromsunetal.,1989 (60.74% ~61.34%),K 2 O (3.01% ~ 3.02%),,FeO T /MgO (2.28~2.31),,(La/Yb) N 6.85~ 7.08, Eu (δeu 0.56~0.59), A/CNK (0.89~0.94)<1,, Th Rb K, Ba Ta Nb Ti, I, I (,2011;,2012); (Watsonetal., 1983;Mileretal.,2003) 8 790, (Lachlan Fold Fig.8 Histogram ofisotopic ages from magmatic and Belt) Ⅰ (781,King volcanicrocksinqimantagemamaticbelts etal.,1997) ; Whalen (1987),2006; I&S ( 9), S I ACF (Whiteetal.,1977), Fig.7 I ( 10a), (Altherretal.,2000), Primitive mantle-normalizedtraceelementdiagrams forthegranodioritefromthenorthwestof Weibaodeposit, XinjiangQimantage 1 (WB17,WB18,WB19);2 ~ 5,,2001;,2001;LiuChengdongetal.,2004;,2012;,2014;,2014 Accordingtothedataofthisarticle;ChenDanlingetal.,2001;Liu Chengdongetal.,2004;LiuYunhuaetal.,2006;FengChengyouet al.,2012;gaoyongbaoetal.,2014;wangzengzhenetal.,2014 andreferencestherein

3 : 481 9 A I&S ( Whalenetal.,1987) Fig.9 DiscriminationdiagramsforA-typeandI-&S-typegranite(AfterWhalenetal.,1987) 10 A(Al-Na-K)-C(Ca)-F(Mg+Fe 2+ ) ( Whiteetal.,1977;Altherretal.,2000) Fig.

9 3 : A I&S ( Whalenetal.,1987) Fig.9 DiscriminationdiagramsforA-typeandI-&S-typegranite(AfterWhalenetal.,1987) 10 A(Al-Na-K)-C(Ca)-F(Mg+Fe 2+ ) ( Whiteetal.,1977;Altherretal.,2000) Fig.10 PlotofA(Al-Na-K)-C(Ca)-F(Mg+Fe 2+ )anddiscriminatntdiagramforthesourcerockofgranodiorite inthenorthwestofweibaodeposit,xinjiangqimantage(afterwhiteetal.,1977;altherretal.,2000) ( 10b),, I 5.3 I ( (Pitcher,1987),,2007),,,, ( 8), I (, 2007),, I (,2008;,2012), :, ( Pearce (1984) Pearce(1996) Rb-,,2007,,2014) ( (Y+Nb) ( 11), );

10 482 htp:// Rb- ( 6,7) (Y+Nb) ( Pearce,1984,1996), Fig.11 Rb-(Y + Nb) diagram for discriminating the, ( tectonicsetingsforthegranodioritefromthenorthwestof ), Weibaodeposit,Xinjiang Qimantage (AfterPearce,1984,, 1996) (,2006;,, 2009) - -, (Biga Peninsula) (Ulubey) ; -, (Aldanmazetal.,2000;Temizeletal.,2012) -(SinaiPeninsula)(Bialy (260~230Ma), (, etal.,2013) 1998), (237~218Ma) (,2012;,2012), (, 2002;,2004;,2005;, 2007), 212±7Ma A (,2001) 210±1Ma ( ) A (,2014), SIMS (227±2.7Ma), ( 6,7), - 1b),, - (,2007;,, 2012),, ( 2a,2b) 5.4, I - ( U-Pb ±3.3 Ma, ), ( (227±2.7Ma), ( Rb-Sr 222±2Ma,, 2001),, (,2001), (CA= 59), ;, (REE= ~ ), (La N /Yb N = 9.02~23.14) (δeu =0.26~0.82), (2002) :( ),, (Robertsetal.,1993), 11),

11 3 : 483,, -, ;, A, - (Robertsetal.,1993;, Pearce,1996;Eklundetal.,1998),, Sr Nd : 87 Sr/ 86 Sr ~0.715,εNd(t) -5.10~1.33, (, 2007) 239±, 6Ma (,2004) 227±1Ma (,2002), -, 218±2Ma (,, Pb 2011) 228±1Ma δ 34 S ( (,2012) 224±1Ma,2010) (,2014) 234± 1Ma 234±1Ma (,2014), (1)SIMS U-Pb (239~213Ma), ±2.3 Ma(n=16,MSWD=0.02), (,, 2002;LiuChengdongetal.,2004;,2007;,2012),, 6 (2) :, (227±2Ma),SiO % ~61.34%,K 2O I, 3.01%~3.20%,A/CNK 0.89~0.94, ( 2), I,, U-Pb,, Eu (δeu =0.56~0.59), ( Rb K Th, 234±1Ma,,2014), Ba Ta Nb Ti (239~213Ma), (3),, ( ),,, Pb (,2010), : I, ;SIMS U-Pb (Altherretal., 2000), ; ( 10),,,

12 484 htp:// ,21(6):292~297.? ,43(4):10~17.,22(10):2457~2463.,,,,.2002.,,,,,,, ,13 (3):403~414.,,.2005.,,,, A.,30(6):540~,1( ):2~4.,,,,, ,,,, ,34.,32 (2):306~ (3):386~395. :,,,,,,, ,,,, ,,,,.2012.,36(4):769~782. :.,28 (2):665~678.,,, ,33(4):,,,, ~616. Hf. (,,, ),48(2):36~47.,,,,,,. Nd~Hf.,27(11):2280~ ,,,, Hf.,30(6):1647~1665..,,,,.1998.,25(1):55~66..,12, U-Pb (3):344~352..,49(16):1589~ ,,,, ,14(3):64~72..,22(6):503~ : AldanmazE,PearceJ A,Thirlwal M F, MitchelJ G ( ). PetrogeneticevolutionoflateCenozoic,post-colisionvolcanism, in western Anatolia, Turkey.Journal of Volcanology and.,28(4):499~507. GeothermalResearch,102(1~2):67~ ,23 AltherrR,HolA,HegnerE,LangerC,KreuzerH.2000.High- (11):163~166,169. potassium,calc-alkaline I-type plutonism in the European,, Variscides: Northern Vosges (France ) and northern :,1~400.,,,,,, Schwarzwald(Germany).Lithos,50(1),51~73. Bialy M Z, Ali K A.2013.Zircon trace element geochemical.,82 constraintsontheevolutionoftheediacaran( ma)post- (7):949~955.,,,,, colisionaldokhanvolcanicsandyoungergranitesofsesinai, NE Arabian-NubianShield.ChemicalGeology,360~361:54~ 73..,28(6):1785~1807. EklundO,Konopelko D,Rutanen H,Fr jd S,Shebanov A D.,,,,, Ga Svecofennian post-colisional shoshonitic : SHRIMP.,49(6):596~602. magmatisminthefennoscandianshield.lithos,45(1):87~ : KingP L, White A J R,Chappel B W, Alen C M ,17(3):337~351. Characterizationandoriginofaluminous A-typegranitesfrom,,, the Lachlan Fold Belt,southeastern Australia.Journal of :.,18(4):433~448. Petrology,38(3):371~391.,,,, LiXianhua,Liu Yu,LiQiuli,Guo Cunhua,Chamberlain K R. SHRIMP U-Pb PrecisedeterminationofPhanerozoiczirconPb/Pbageby

13 3 : 485 multicolector SIMS without external standardization. Geochemistry,Geophysics,Geosystems,10(4):1~21. LiuChengdong, Mo Xuanxue,Luo Zhaohua,Yu Xuehui,Chen Hongwei,LiShuwei,ZhaoXin.2004.Mixingeventsbetween the crust-and mantle-derived magmas in Eastern Kunlun: evidencefromzirconshrimp Ichronology.ChineseScience Buletin,49(8):828~834. Ludwig K R, User's manual for isoplot 3.0: a geochronological toolkit for Microsoft Excel. Berkeley GeochronologyCenter,1-71. MilerC F, McDowelS M, Mapes R W.2003.Hotandcold granites Implications ofzircon saturation temperatures and preservationofinheritance.geology,31(6):529~532. PearceJ A,Harris N B W,Tindle A G.1984.Traceelement discriminationdiagramsforthetectonicinterpretationofgranitic rocks.journalofpetrology,25(4):956~983. PearceJA.1996.Sourceandsetingsofgraniticrocks.Episodes, 19(4):120~125. PitcherW S.1987.Granitesandyetmoregranitesfortyyearson. GeologischeRundschau,76(1):51~79. RobertsM P,ClemensJD.1993.Originofhigh-potassium,talc- alkaline,i-typegranitoids.geology,21(9):825~828. RickwoodP C.1989.Boundarylines within petrologicdiagrams whichuseoxidesofmajorandminorelements.lithos,22(4): 247~263. SlámaJ,KoslerJ,Condon,DJ,CrowleyJL,GerdesA,Hanchar JM,Horstwood M SA,MorrisG A,NasdalaL,NorbergN, SchalteggerU,SchoeneB,Tubret M N,Whitehouse M J Ple ovicezircon-anewnaturalreferencematerialforu-pb andhfisotopicmicroanalysis.chemicalgeology,249(1):1~ 35. StaceyJS,KramersJD.1975.Approximationofterrestriallead isotopeevolutionbyatwo-stage model.earthand Planetary ScienceLeters,26(2):207~221. SunSS,McDonough W F.1989.Chemicalandisotopicsystematics ofoceanic basalts:implicationsfor mantle composition and processes.in:saundersa D,Norry MJ,eds.Magmatismin the Ocean Basins. Geological Society, London, Special Publications,42:313~345. TemizelI,Arslan M,RufetG,PeucatJJ.2012.Petrochemistry, geochronologyandsr-ndisotopicsystematicsofthe Tertiary colisionalandpost-colisionalvolcanicrocksfromthe Ulubey (Ordu)area,eastern Pontide,NE Turkey:Implicationsfor extension-related origin and mantle source characteristics. Lithos, :126~147. WatsonE B,Harrison T M.1983.Zirconsaturationrevisited: temperature and composition efectsin a variety ofcrustal magmatypes.earthandplanetaryscienceleters,64(2):295 ~304. WhalenJB,Currie K L,ChappelB W.1987.A-typegranites: geochemicalcharacteristics,discrimination and petrogenesis. Contributionstomineralogyandpetrology,95(4):407~419. White A J R, Chappel B W Ultrametamorphism and granitoidgenesis.tectonophysics,43(1):7~22. Wiedenbeck M,AleP,CorfuF,Grifin W L,MeierM,OberliF, VonquadtA,RoddickJC,Speigel W.1995.Threenatural zirconstandardsforu-th-pb,lu-hf,traceelementandree analyses.geostandardnewsleters,19(1):1~23.

14 486 htp:// Geochronology,GeochemistryandTectonicImplicationsofGranodiorite inthenorthwestofweibaodeposit,xinjiangqimantage ZHOUJianhou 1),FENGChengyou 1),SHEN Dengliang 2),LIDaxin 1), WANG Hui 1),ZHANG Mingyu 1),MAShengchao 3) 1)MLR Key Laboratoryof Metalogeny and Mineral Asesment,Instituteof MineralResources,Chinese Academyof GeologicalSciences,Beijing,100037;2)Geophysicaland GeochemicalProspecting Team of Mineraland Resource Bureauof Xinjiang,Changji,Xinjiang,831100;3)Shangdong ZhengyuanInstituteof GeologicalExploration of China MetalurgicalGeology Bureau,Jinan, Abstract WeibaoCuPbZn-polymetalicdepositislocatedinRuoqiangcountryofXinjiangAutonomousRegion, whichisclosetoqinghaiprovince.thedepositisarecentlydiscoveredpotential-largescalepolymetalic depositin Xinjiang Qimantage.Inthispaper,onegranodioritesample (WB17)containingthe mafic microgranularenclavefromtheplutoninthenorthwestof Weibaodepositandthreegranodioritesamples (WB17,WB18,WB19)fromdiferentpositionsinthesameplutonwerecolectedandusedforpetrographic observationsaswelasgeochronologicalandgeochemicalstudies.theplutoncontainsamphibole,andits A/CNKisintherangeof ,withSiO 2andK 2Ocontentrangingform60.74%~61.34%,3.01% ~3.20%,respectively.Thusthisplutonis metaluminousand high-k calc-alkalinei-typegranite.in addition,thisplutonischaracterizedbyenrichmentofliles(rb,th,k)anddepletionofba,ta,nb, Ti,withthechondrite-normalizedREEpaternsofright-dippingtypeandmoderatenegativeanomaliesof Eu (δeu= ).simpzirconu-pbdatingofthegranodioriteyieldsconcordantanageof227.6 ± 2.3 Ma(n=16,MSWD=0.02),whichimpliesthegranodioriteemplacedin Late Triassic.Thedata obtainedbytheauthorsandpreviouslypublishedshowthatthegranodioriteistheresultofthelarge-scale intermediate-acid magmaemplacementfrom Middle Triassicto Late Triassicinthe Qimantage,East Kunlun.Basedontectonichistoryandthestructureenvironmentdiscrimination,thegranodiorite was inferredtobeformedinapost-colisionaltectonicsetingandwasprobablytheproductofpartialmelting fromthemetaigneousrocks,whichmaybetriggeredbymantle-crustinteraction. Keywords:I-typegranite;post-colisionaltectonicseting;mantle-crustinteraction;SIMSzircon U-Pbdating;Weibao;Qimantage,Xinjiang

, 3.1 PM303, 10(2)( 5, 5 ), 1 w (SiO 2 ) 68% ~89%, 2( 1, 1) (Al 2O 3,Fe 2O 3,MnO) (MgO,K 2O, Na 2O),w(TiO 2 ) w (SiO 2 ) ;,w (TiO 2 ) 0.31%

, 3.1 PM303, 10(2)( 5, 5 ), 1 w (SiO 2 ) 68% ~89%, 2( 1, 1) (Al 2O 3,Fe 2O 3,MnO) (MgO,K 2O, Na 2O),w(TiO 2 ) w (SiO 2 ) ;,w (TiO 2 ) 0.31% 36 3 2017 5 GeologicalScienceandTechnologyInformation Vol.36 No.3 May 2017 doi:10.19509/j.cnki.dzkq.2017.0302,,,. [J].,2017,36(3): 7-17. 1, 1, 1, 2, 1 3 (1., 264004;2. ( ), 430074; 3., 710000) :, (Al 2O