: (2010) U-Pb SHR IM P 1 5, , ; 31, ) (1996) U 2Pb SHR IM P, U 2Pb ; (2006) SHR IM P,

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1 : (2010) U-Pb SHR IM P 1, 2, 2, 2, 3, 2 (11, ; 21, ; 31, ) : SiO %68134%, A l2o %15191%, T io %01772%, T Fe2O 3 6%, M go, 3%,, 2R EE ,, Eu ; (NA SC), CeEu,, U 2Pb SHR IM P 282 M a, 2 2 : ; ; U 2Pb SHR IM P : P542 : A (1996), (, 2002;, 2002)(1994) U 2Pb Pb t1 N d,, (, 2006), U 2Pb (2006) U 2Pb SHR IM P,, ; (2006) U 2Pb SHR IM P 281 M a,,, 15, U 2Pb SHR IM P, : ; : : 15 (XJQD ) : (19662),,, E2m ail lyongxiao@1631com

2 1 : U 2Pb SHR IM P ,,, 2, (1A ), 120 (1978 ) (D 1k) (D 2a), 1996,,, (1B ) 1 (2006, ) F ig11p recam brian strata distribution in A ltay area (M odified after H u A iqin et al., 2006) and the geo logical sketch of th is area Kz1 ; C1 2; D 1 ; S1 ; O 1 2; D 2a1 ; 11 ; 21 ; 31 ; 41 + ; 51 ; 61 ; 71 ; 81 SHR IM P ; 91 A ; 101 U 2Pb SHR IM P,,, (2), mm,, 26 mm,,,,,,, 30%50% ;,,, 0111 mm,, 25%40% ;

3 46 N OR T H W ES T ERN GEOL OGY 2010,, 0111 mm,,, 15%30% ;, 0122 mm,,,, 10%20% ;,, 2%,, 0111 mm,,, 1%5% ; 2 F ig12eyed structure, sch lieren structure and banded structure of Suput gneiss 2, ; N b Zr H f Sr Ba V ICP2A ES, C r N i Co, T h, U, Ga 20%98%, 20%, A l2o 3 T Fe2O 3 T io 2 (D Z ), F < 1 97%, 1 1,, SiO %68. 34%, A l2o %15. 91%, T io %0. 772%, T Fe2O 3 6%,M go, 3%, CaO, 2%, 4. 01%, K 2O N a2o, 2R EE

4 1 : U 2Pb SHR IM P 47 1(% ) (10-6 ) T ab11m ajo r elem ents (% ) and trace elem ents (10-6 ) contents of the Suput gneiss YQ 210 YQ 2921 YQ 4221 YQ 4421 YQ 9221 YQ 246 SiO T io A l2o T Fe M no M go CaO N a2o K2O P2O A K D F L a Ce P r N d Sm Eu Gd T b D y Ho E r Tm Yb L u REE L REEgHREE Eu (L agyb) N Y Rb Sr Ba Ga N b T a Zr H f T h V C r Co N i U

5 48 N OR T H W ES T ERN GEOL OGY ,, , Eu, Eu ; (NA SC) (3A ),, ( (L agyb) N ), Ce Eu, CegCe , 1, ; (3B ),,, Eu R b Sr Ba, Ba 3(NASC) (A) (B) F ig13na SC2no rm alized (A ) and chondrite2no rm alized (B ) R EE pattern of Suput gneiss, R b Sr ; N b T a Zr H fy, N b Zr, ; T h V C r Co N i ; SrgBa , 0121, SrgBa (0122), (015) ; T hgu , (019) (412) ( ),, Ba N b P Zr T i 3U 2Pb SHR IM P, : ; TW 23, 15 kg,,,,,, mm mm, 2141,, (4) R SES T EM, SHR IM P U 2Pb,, U 2Pb SHR IM P II, (, 2002)R SES T EM (417 M a ), SL 13 (572 M a; U ) U T h Pb, PRAW N, 204 Pb, 2 2 1Ρ, 206 Pb g 238 U, 95% 2, U T h, T h gu , Pb g 238 U ( )( )M a, (2824) M a,m SW D = 0132 (5)

6 1 : U 2Pb SHR IM P 49 4 F ig14cathodo lum inescence im ages of zircons in Suput gneiss Spo t U g U 2Pb T ab 12U 2Pb SHR IM P data of zircons from Suput gneiss T hg 10-6 T hgu f # 206g% 206 Pb 3 g 238 U 207 Pb 3 g 235 U 207 Pb 3 g 206 Pb Pbg 238 U A gegm a 207 Pbg 206 Pbg A gegm a : f # 206: percentage of common 206 Pb in to tal 206 Pb D F, , - 012, ; K2A (6),, ; (al+ fm ) 2(c+ alk ) 2Si ( ),,

7 50 N OR T H W ES T ERN GEOL OGY U 2Pb F ig15u 2Pb conco rdia diagram fo r zircons in Suput gneiss (Bhatia, 1985) (3),,,, 3,, 6K2A (, 2006) F ig16k2a diagram fo r Suput gneiss A = A l2o 3g(A l2o 3+ CaO + N a2o + K2O ) ; K= K2O g(n a2o + K2O ) () 3 T ab13comparison of Petrochem istry and rare2earth elem ent in Suput gneiss w ith that of grayw acke in different tecto tope SiO (66) T io (0169) A l2o (1416) M no (0111) M go (3117) CaO (2101) N a2o (2156) K2O (2173) P 2O (0116) A l2o 3gSiO (0122) K2O gn a2o (1117) A l2o 3g(CaO + N a2o ) (315) L a (4411) Ce (7419) 2REE (19213) L R ghr (8142) L agyb (1616) Eu (0166) (L agyb) N (1112) M 1R 1Bhatia (1985)

8 1 : U 2Pb SHR IM P 51 Ce, Ce,, Ce, Ce, Ce 412 U 2Pb SHR IM P 1978, 120,, (D 1k) (D 2a), ; 1988, 150,, (, 1989) ; Sm 2N d, t= 71283M a, (, 1996), (2002), U 2Pb Pb t1 N d (, 1996),, (, 2006) U 2Pb (2006) U 2Pb SHR IM P 281 M a,, (2006) U 2Pb SHR IM P,, ; (2008) U 2Pb SHR IM P 326 M a, U 2Pb SHR IM P 282 M a,,, U 2Pb (281 M a), U 2Pb,,,,, (, 2001), ;, 2 (2007) (283 M a) U 2Pb SHR IM P ; (2006) ; (, 2005), 2, 2,,,, U 2Pb SHR IM P (1), (2),, Eu,

9 52 N OR T H W ES T ERN GEOL OGY 2010 (3), U 2Pb SHR IM P 282 M a,, 2 2 :! (R eferences) :,,, 1 [J ]1, 2002, 29 (1): Fang Tonghui, W ang J ingbin, Zhang J inhong, et al1, P ro terozo ic basaltic m agm a intrusion event in the A ltai, X injinag [J ] 1 Geo logy in Ch ina, 2002, 29 (1): (in Ch inese w ith English abstract) 1,,, 1 [J ]1, 2002, 37 (2): H u A iqin, Zhang Guoxing, Zhang Q ianfeng, et al1 A review on ages of P recam brian m etamo rph ic rock s from A ltai o rogen in X injiang, NW Ch ina [ J ] 1 Ch inese Journal of Geo logy, 2002, 37 (2): (in Ch inese w ith English abstract) 1,,, 1 SHR IM P U 2Pb [J ]1, 2006, 22 (1): H u A iqin, W ei Gangjian, D eng W eifeng, et al1 SHR IM P zircon U 2Pb dating and its significance fo r gneisses from the southw est area to Q inghe County in the A ltai, Ch ina [J ]1A cta Petro logica Sinica, 2006, 22 (1): 1210 (in Ch inese w ith English abstract) 1,, 1 U 2Pb [J ]1, 2001, 8 (3): J ian P ing, Cheng Yuqi, L iu D unyi1 Petrograph ical study of m etamo rph ic zircon: basic ro les in interp retation of U 2 Pb age of h igh grade m etamo rph ic rock s [J ] 1 Earth Science F rontiers, 2001, 8 ( 3 ): ( in Ch inese w ith English abstract) 1,,, 1 [A ]1 :, [C ] 1 :, 1996, L i T iande, Q i Zh im ing, W u Boqing, et al1 A dvance developm ent of geo logical and m etallogenic research on A ltay in Ch ina and Kazak stan [A ]1In: Ch ina Geo socie2 ty, to 30th International Geo logical Conference, Science exchange conference paper co llections of the85 geo logical science and techno logy m agnitude fruits [C ]1 M etallurgy Industry Publish ing House, Beijing, 1996, (in Ch inese w ith English abstract) 1,,, 1 U 2Pb SHR IM P [J ]1, 2008, 22 (2): L iu GR, Q in JH, Zhao ZH, et al1 SHR IM P U 2Pb A ges of Zircon in the Gneiss of E rqisi T ectonic Belt in A ltay, X injiang, and T heir Geo logical Significances [ J ] 1 Geo science, 2008, 22 ( 2 ): ( in Ch inese w ith English abstract),, 1 SHR IM P [J ]1, ( ), 2002, Song B, Zhang, Y H,W an Y S1 D iscussion on the mount p reparation, age dating and related issues[j ]1 Geo logy R eview (Supp1), 2002: (in Ch inese w ith English abstract),,, 1 U 2Pb [J ]1, 2006, 25 (2): Tong Y, Hong D W, W ang T,W ang S G et al1 T im s U 2Pb zircon ages of Fuyun po st2o rogenic linear granite p lutons on the southern m argin of A ltay o rogenic belt and their im p lications [ J ] 1A cta Petro logica et M ineralogica, 2006, 25 ( 2 ): ( in Ch inese w ith English abstract) 1,,, 1 [M ]1 :, W ang D enghong, Chen Yuchuan, Xu Zh igang, et al1 M inerogenic Series and M etallogenic R egularity of the A ltay M etallogenic P rovince, X injiang, Ch ina [M ]1 A tom ic Energy P ress, Beijing, 2002 (in Ch inese) 1,,, SHR IM P [J ]1, 21 (3): W ang T, Hong D W, Tong Y, H an BF and Sh i Y R 1Zircon U 2Pb SHR IM P age and o rigin of po st2o rogenic L am azhao granitic p luton from A ltai o rogen: its im p lications fo r vertical continental grow th [ J ] 1A cta Petro logica Sinica, 2005, 21 ( 3 ): ( in Ch inese

10 1 : U 2Pb SHR IM P 53 w ith English abstract) 1,, 1 [J ]1, 1989, 7 (2): Yan Y K, Zhang Q Z, Q in Y X, et al1d iscover and geo logical sign ificance of m icropaleoflo ra from the m etamo rph ic rock s in A ltay region of X injiang [J ] 1 X injiang Geo logy1 1989, 7 (2): ( in Ch inese w ith English abstract) 1,,, 1 U 2Pb SHR IM P [J ]1, 2006, 33 (6): Zhou Gang, Zhang Zhaocong, H e B in, et al1shr IM P zircon U 2Pb dating of gneisses in the M ayin O bo fault belt, no rthern X injing, and its significance[j ]1Geo logy In Ch ina, 2006, 33 ( 6 ): ( in Ch inese w ith English abstract) 1,,, 1 : [J ] 1, 2007, 23 (8): Zhou G, Zhang Z C, L ou S B, et al. Confirm ation of h igh2 tem perature strongly peralum inous M ayinebo granites in the south m argin o r A ltay, X injiang: age, geochem istry and tectonic im p lications [ J ] 1A cta Petro logica Sinica, 2007, 23 (8): (in Ch inese w ith English abstract) 1 1 [M ]1 :, 1994, Zhuang Yuxun1 T ectono therm al Evo lution in Space and T im e and O rogenic P rocessof A ltay, Ch ina [M ] 1J ilin Science A nd T echno logy Publish ing House, Chang2 chum, 1994, (in Ch inese w ith English abstract) 1 Bhatia M R 1 R are earth elem ent geochem istry of A ustralian Paleozo ic grayw ackes and m udrock s: P rovenence and tectonic contro l[j ]1 Sedim ent Geo l, 1985, 45: Geochem istry and Zircon SHR IM P U-Pb Dating for Gne iss in Fuyun-Supute Belt of X ingj iang L E I Yong2x iao 1, ZHOU Gang 2, Q IN J i2hua 2, ZHAN G L i2w u 2, YU W ei2dong 3, H E L i2x in 2 (1. X ian Institu te of Geology and M inera l R esou rces, X i an , Ch ina; 2. N o. 4 Geology P a ry of X inj ing B u reau of Geology and M inera l R eou rces, A ltay, , Ch ina; 31 B aod i M in ing Com p any, U rum qi 83000, Ch ina) Abstract: T he Supute gneiss comp lex is compo sed of andalu site, sillim an ite, and co rdierite. It con tain s SiO 2 rang ing from 63. 1% to 68. 3%, A l2o 3 from % to %, T io 2 from 0. 53% to 0. 77%, and relatively h igh M go (mo stly3% ). p roducts of greyw ackeṡ In line w ith their geochem ical compo sition, they are m etamo rph ized Fo r the trace elem en ts, their to tal R EE ranges from 155ppm to 272ppm and the L R EE are en riched relative to the HR EE w ith m iddle Eu negative anom alies. NA SC no rm alized R EE pattern s of the Supute gneiss are coheren tly flat w ith in sign ifican t Ce and Eu anom alies. T heir geochem istry suggests that they are fo rm ed along an active con tinen tal m argin. Zircon s from Supute gneiss show typ ical characteristics crystallized from m agm a and a SHR IM P U 2Pb age of 282 M a. T hu s, the Supute gneiss rep resen ts an early Perm ian tectonom agm atic even ṫ Key words: Supute gneiss; geochem istry; zircon SHR IM P U 2Pb age