新疆阿尔泰造山带海西期花岗伟晶岩地球化学特征、年代学及地质意义.pdf

新疆地质XINJIANGGEOLOGY2024年3月Mar.2024第42卷 第1期Vol.42 No.1?新疆维吾尔自治区自?科学基?目（2022D01A288）、新疆维吾尔自治区系?地质?件数据?理与?地质研究（DD1913）和新疆维吾尔自治区“?”计?联合?日期?2023-11-29?日期?2024-01-02?（1986-），?，?人，?，中国矿业大学地质?源与地质?专业?读?，主要从事地质矿产综合研究及区域地质矿产?查?作?E-mail:?西?地球化学特征?学及地?1,2，赵?1，?1，?1，?1（1.新疆维吾尔自治区地质调查院，新疆 乌鲁木齐 830000；2.中国?，?221000）?尔?是我国也是世?上最?要的伟?区，伟?作为?的矿?类?，?矿?学研究中?有?要?。本?研究选?尔?西?尔?伟?和?伟?为研究?象，?LA-ICP-MS?U-Pb年?为（343.7?1.7）Ma，为?世?西期?产物。地球?学?征?，伟?、?质、中?、中?等?征，?低?系?向?性系?的?征。?元?有Ba，Ta，Nb，Sr，Zr，Ti?常，Rb，?，Nb，P，?f，Y?常?征，接?地?。?为“?”?，?“?”?征。?含?低，?中等，?明?，?明?，?为?，?“V”?。成?类?为?质成?伟?，为NYF?。形成?生?，?，?，?流?性?的?体-流体?定，?形成?有?伟?矿?。?西期?NYF?伟?尔?尔?是中?（CAOB）的?要?成部?，?尔?是我国也是世?上最?要的伟?地区，有编号的伟?数?之?。伟?作为?的矿?类?，?矿?学研究方面地位?1?。?等?据?、?矿物?合、矿?征、?矿物类?及与?接?关系等，?区内伟?为?质?伟?、?合交?伟?及?伟?等3?类?2?。据?尔?伟?含矿性?可?为?类?，各类?可能形成?，?中矿?大、?、矿物?性?的伟?可能形成?西期?期?之?3?。任?等?LA-ICP-MS技术?尔?19?伟?行U-Pb年?学研究，?尔?伟?为4?主要成矿时期：?期（?476Ma）、?西?期（260?280Ma）、印支期（205?250 Ma）和?期（180?200 Ma），?中?、?为主?4?。Gerny?含Li，Rb，Cs，Be，Ga，Sn，Nb?Ta，B，P，F等元?的伟?为LCT?伟?，?为LCT?伟?常与?、?期?质“S”?关?5-6?。?研究?主要?成矿伟?方面，?成矿的伟?研究?，伟?及?关矿?可作为?，?是?的?1?，?研究大地?中?有?要?。本?研究选?尔?西期?伟?为研究?象，?合?人?有?伟?年?学的研究，?尔?含矿伟?和?矿?伟?的形成时?及期?，?时?形成的大地?及?尔?的?。1 地?景中国?尔?位?中?西?部（?1-a），?邻西?，?齐?与?尔地?接?，向?与?国?尔?接，向西?可?矿区?尔?和?的?区?尔?4?。区域上?-?尔?和?-库尔?为?，由?向?为?尔?、中?尔?和?尔?3?体（?1-b）。?尔?主要由?世?质?成?7?中?尔?主要由?质?系及大面?成，可能?基?8-9?尔?主要由?统?和中?统?的?质?-?系?成。?尔?，?入?发?，?全区面?的?编?1000-8845(2024)01-014-11?P588.13+1;P59?A第42卷 第1期?等：新疆?尔?西期?伟?地球?学?征、年?学及地质?40?上。研究?，?尔?大?为514?430 Ma、416?365 Ma、360?318 Ma、310?252 Ma和212?180 Ma等5?10?，与大地?-?、?、?内?张-?和中生?内?5?。?伟?主要?中?尔?。2?分?2.1?本?位?年?1件，?地理?90?20?14.26?、E46?41?44.54?。?3件，全?8件，?性为伟?。?尔伟?出?，?定?产出（?2-a），?性为?伟?，?中等，全?质?，?，主要矿物为?、?、?及?电?，?为3?5 mm，部?中含?大?，?矿?、?。?入?合，主要?性为?、?等。?接?上发生?，?象?、?、电?、?，?发生?伟?交?。?伟?定?产出，?成群、成?、?等?征，?入?（?2-c），主要?性为含?、?等（?2-d）。伟?主要由?、?成，?为?、?电?（?2-b），?，?自形-自形?，?0.6?7.2 mm，含?77?，?、?。?之?形?及?自形?。电?自形?，?中。2.2?为?证?品?要，?选?区域地质矿产?查研究所?成。?品?，?常规?和?选方法?选出?，?目?。?品?和?科技有限公司?成，?成的?品?上的?行?学?的?、?和电子?的?发?，?行?定时作为选取?部位?据，及?定?成?行合?辑的数据?。全?国?源部乌鲁木齐矿产?源?中心?成。?年?京?科技有限公司?成，?与New Wave 213 nm?取?系统?接?来的Agilent 7 500 a ICP-MS?成。?中，?1?地质?地质?Fig.1 Regional geological structure sketch of Altai geological map of the study area1.第?系?2.中?统?3.中?统?4.中元?群?5.伟?6.?7.?8.?9.地质?10.?位?15新疆地质2024年?直?20?30?m，?5?。?品?，由?e?作为载?，?和Ar?合?入ICP-MS?行?。U-Pb 年?和 U，Th，Pb 的计?由GLITTER?件（ver.4.4）?，?Pb校?和及?和?的?Isoplot?成?11?。?地球化学?3.1主?主?元?果?1，SiO2含?73.7?80.42?，?76.36?。Al2O3含?14.98?80.42?，?14.13?。全?性（?2O?Na2O）为4.7?8.24?，?6.6。CaO含?0.36?1.29?，?0.70?。?2O/Na2O?1，?总体上?征。全?（Fe2O3?FeO）为 0.4?1.33?，?0.9?。P2O5为0.19?0.25?，?0.21?。CIPW?矿物出?、?、?、?、?及?矿物?、?矿、?矿、刚?等（?2）。上述?征?明，本?的伟?有?、?、中?、中?、低?、低?征。?SiO2-?2O?中（?3），?关关系，?低?系?向?性系?征。?AR-SiO2?（?4），?品基本?入“?性”区内，?性?征，?定?为74?、77?，?性?征。DI为97.64，?。?和?数A/CN?为1.147?1.609，?1.3，大?1.1，?质?。?伟?A/CN?-A/N?中（?5），所有?品?入“?质”区内，?质?征。3.2?数据?3。?元?（?FSE）含?，Th含?0.35?10-6?1?10-6、U含?0.38?10-6?1.46?10-6、Zr含?20.98?10-6?63.96?10-6、?f含?0.6?10-6?2.41?10-6、Y含?3.9?10-6?10.4?10-6，含?中等。Nb含?2.94?10-6?8.3?10-6、Ta含?0.2?10-6?1.04?10-6，?大。Nb/Ta为3.35?38.15，?大。大?子?2?Fig.2 Field macro photos of pegmatite?伟?gn?sch?Ad?Tou?电?Mu?1?主?T a b l e 1T e s t r e s u l t s ma j o r e l e me n t s i nn o r t hQ i n g h e a n dB u e r j i nD o n g g e l i e k e p e g ma t i t ed i k e s i nt h e A l t a i o r o g e n i c b e l t样品编号19YQ-2519YQ-2619YQ-2719YQ-2819YQ-3014YQ-405514YQ-405714YQ-4058采样地点青河县北布尔津县冬格列克北SiO275.5676.0375.8875.7277.1273.7076.4480.42Al2O314.6713.7814.8114.2214.2414.9814.4111.90Fe2O30.480.681.020.320.240.640.790.48CaO0.641.290.590.620.980.530.580.36MgO0.190.280.380.180.120.390.420.26?2O1.920.601.003.190.834.141.781.76Na2O5.435.484.794.615.654.104.442.94TiO20.0080.0120.0210.0070.0200.0300.0360.020P2O50.250.210.220.200.160.220.200.19FeO0.330.310.310.260.160.390.410.38烧失量0.381.320.740.530.530.801.161.21吸附水0.020.010.010.040.080.080.120.07?单位：国?源部乌鲁木齐矿产?源?中心16第42卷 第1期?等：新疆?尔?西期?伟?地球?学?征、年?学及地质?元?（LILE）Rb，Ba，Sr含?大，Rb含?为18.54?10-6?79.3?10-6、Ba含?为6.01?10-6?122?10-6、Sr 含?为 13.42?10-6?69.28?10-6，明?低?地?。?元?网?中（?6），?Ba，Ta，Nb，Sr，Zr，Ti?常，Rb，?，Nb，P，?f，Y的?常，接?地?。?品?元?，?“?”?形?，?“?”?征?12-13?。?是由?的?质?形成。?质?，?是与?发?有关的?类，是最?电?的，可?大?B?14-15?，由Na，?，Li，Cl，F，P，Fe，Mn等?成?16?。?REE为9.27?10-6?17.82?10-6，总?低，LREE为8.19?10-6?13.75?10-6，?REE为2.45?10-6?4.07?10-6，?含?。LREE/?REE为2.30?4.57，?2?CIPW?Table 2 CIPW calculated results of the northern pegmatite dikes in north?inghe and Buer?in?onggelieke in Altai orogenic belt样号19YQ-2519YQ-2619YQ-2719YQ-2819YQ-3014YQ-405514YQ-405714YQ-4058样号19YQ-2519YQ-2619YQ-2719YQ-2819YQ-3014YQ-405514YQ-405714YQ-4058Q35.6339.4842.9935.7539.3332.9542.3556.39A/CN?1.2051.1471.4761.1691.1891.2291.4011.609An1.555.101.511.783.841.201.580.55A/N?1.621.992.171.391.901.331.861.96Ab46.1947.0140.9539.2848.0435.0137.7725.21SI2.283.825.102.101.724.045.384.48Or11.413.595.9718.984.9324.6910.5710.54AR2.852.352.203.222.483.272.422.24C3.112.305.362.552.663.354.635.02?431.661.111.021.861.232.201.160.59?y11.421.930.810.551.551.871.34R12 6482 9913 1162 6632 9392 4793 0823 928Il0.020.020.040.010.040.060.070.04R2368428376357392373367289Mt0.510.570.750.380.240.680.700.47F10.730.720.750.740.730.740.750.79Ap0.580.490.520.470.370.510.470.45F2-1.33-1.45-1.39-1.19-1.43-1.10-1.31-1.26A52.0823.0138.6554.8931.9458.0843.4334.50F3-2.63-2.61-2.59-2.60-2.63-2.59-2.58-2.49P7.0732.699.785.1524.872.826.491.80C/MF0.741.160.400.912.130.410.400.36DI93.2390.0889.9194.0192.3092.6590.6992.14A/MF9.396.835.4811.5317.016.355.436.57?3?SiO2-K2O?Fig.3 SiO2-K2O diagram of pegmatite?4?AR-SiO2?Fig.4 AR-SiO2diagram of pegmatite?5?A?CNK-A?NK?Fig.5 A?CNK-A?NK diagram of pegmatite17新疆地质2024年La?/Sm?为 5.43?6.27，Gd?/Yb?为 0.30?0.58。?中等，?内部?，?明?，?明?。从?中可?出（?7），所有?品?、?明?，?、?明?的?REE?，?Eu 为0.14?1.35，由?明?的?常，?“V”?。4?学?从?中可?出（?8），?形态?规?，?，部?有热?，?6?Fig.6 Spider diagram of trace elements in pegmatite?3?Table 3 Trace and Rear earth elements test results and characteristic?alues of the pegmatite dikes in north?inghe and Buer?in?onggelieke in Altai orogenic belt采样地点分析项目BaCrUYThTaNb?fRbZrSrGdSmNd?oCeErEuTmTbDyLuLaPrYb?REELREE?REELREE/?REELaN/YbN?Eu?Ce青河县北19YQ-256.727.241.208.400.540.246.241.7848.3146.9518.200.310.381.380.113.830.380.030.090.080.540.142.110.460.8010.648.192.453.341.890.260.9119YQ-2620.327.321.469.400.400.245.851.8018.5452.4431.230.340.401.560.123.810.460.040.120.090.600.182.380.461.0211.588.652.932.951.670.320.8419YQ-276.718.401.609.700.751.048.302.4138.4663.9617.890.420.461.630.174.640.600.020.160.120.800.242.600.561.4113.839.913.922.531.320.140.9019YQ-286.015.911.287.500.390.266.731.2371.8338.7129.530.480.542.170.145.350.460.090.110.110.690.152.930.660.8814.7611.743.023.892.390.530.9119YQ-3016.974.580.4410.400.350.207.630.7425.4925.5369.280.330.301.120.162.720.500.140.120.100.680.131.880.300.799.276.462.812.301.711.350.80布尔津县冬格列克北14YQ-405544.0713.580.383.901.000.693.450.8779.3025.9020.630.420.482.200.124.900.410.140.090.090.550.132.700.590.7313.5511.012.544.332.650.930.9114YQ-4057122.0010.100.646.900.760.642.940.6036.3020.9842.540.630.632.800.226.000.700.220.140.140.960.183.400.701.1017.8213.754.073.382.221.060.9014YQ-405839.469.321.004.700.430.943.151.0754.7040.5713.420.380.442.000.114.300.330.110.070.080.490.102.700.560.6512.3210.112.214.572.980.800.81?：?单位为国?源部乌鲁木齐矿产?源?中心?主?元?单位为%?、?元?单位为 10-618第42卷 第1期?等：新疆?尔?西期?伟?地球?学?征、年?学及地质?有?，?明?到?期热?。为?年?，选?热?、?体和?的?位?行?位?年。从?中可?出（?9），?全部?和?上，?成群?中?，?出?的206Pb/238U，年?中?327?363 Ma（?4），?206Pb/238U?年?为（343.7?1.7）Ma（MSDW?0.82，n?20），?合?，?年?为伟?的?年?，?明?为?世?入?产物。综上，?伟?的年?定位为?世，为?西期?产物。5 讨论5.1?尔?伟?为 4?主要形成时期：?期形成年?为476 Ma?西?期形成时?主要为 260?280 Ma?印支期形成时?CL?Fig.?ircion CL photos of north?inghe pegmatite in Altai orogenic belt?-Pb?Fig.?ircon?-Pb concordant diagram and statistical histogram of north?inghe pegmatite in Altai orogenic belt?7?Fig.7 Rare earth elements distribution pattern of pegmatite19新疆地质2024年主要为205?250 Ma?期形成时?主要为180?200 Ma。本?的伟?品?位?中?尔?。?尔?，?入?中?质?的?合，主要?性为?、?。?位?年及区域?，?定形成时?为中?世，区域上?入?发?，形成时?中?。?伟?含矿，?位?年?，?与?入?之?的接?关系，?为?西期伟?。?入?低?合，主要?性为?、含?。?的形成时?，?大?，由?年时?大，?定时?。本?的伟?品?入?中，?含矿。?LA-ICP-MS?位?年?伟?年?为（343.7?1.7）Ma，为?西中期伟?。?尔?中，?时期伟?，?为是?西期?产物。?中?，?流?性?的?体-流体?定，?证能?形成?大、?性?、?有?的含矿伟?的?17?。5.2?尔?有?伟?的形成时?，?大?数据（?5）。?尔?3号伟?的形成时?方面，?S?RIMP?U-Pb定年?、?、?号?的形成年?为（220?9）Ma、（198?7）Ma、（213?6）Ma?18?，?Rb-Sr 等时?年?为（218?5.8）Ma，文象?文象伟?中?40Ar-39Ar等时?年?为（178?1.8）Ma，?-?中?的40Ar-39Ar等时?年?为（109?3.0）Ma，核部?40Ar-39Ar?年?为（148?1.0）Ma?19?大、?伟?形成时?方面，Ar-Ar?年?为（248.4?2.1）Ma、（233.8?0.4）Ma?17?伟?中?Ar-Ar?年?为（154.1?0.1）Ma，等时?年?为（154.1?2.0）Ma?20?。?尔?伟?形成时?方面，?大?位?年数据，?尔?西?部也?伟?中?的206Pb-238U?年?为（476?12）Ma，为?期。?尔?中部的可可?、?鲁木?及大?等伟?矿?中18?伟?形?180?280 Ma?内，为?世之?4?。?尔?有?伟?的形成时?统计?果?：成矿时?主要?中?印支期（?10），?时期?4?Table 4 Isotope test results of north?inghe pegmatite dikes in Altai orogenic belt点号134678910111213141718192021232425测试结果Pb3.6719.8613.815.595.9714.705.929.7812.2214.2410.0716.6110.078.3817.8822.8725.2016.2512.5517.20Th29.95325.52202.1242.2364.09222.6855.39118.28182.94206.39102.21217.53107.47130.20162.92286.69495.20319.90161.13277.40U63.53313.80204.8592.5292.08211.3494.32144.92178.74215.83161.06256.47167.50117.06261.04353.50341.87218.69179.07224.89207Pb/206Pb0.061 8630.053 6810.056 0290.054 2630.057 9750.051 8410.059 4340.055 2830.053 6300.058 1980.061 7010.053 9020.053 6470.057 0220.053 1190.054 4210.053 1340.054 7480.055 7630.054 9301s0.006 2790.002 6900.002 8000.003 4850.005 2950.002 2160.004 2320.002 9870.002 5650.003 9240.004 1900.002 3440.002 9060.004 1470.001 9290.002 2770.002 1420.002 6570.002 6810.002 238207Pb/235U0.431 5580.387 7360.413 1660.394 9430.409 9180.403 9320.460 7160.436 8940.395 8510.437 9280.462 5920.402 7500.377 5720.411 1540.421 7850.395 2730.397 2690.390 3890.417 3940.425 5941s0.040 0840.018 7490.019 7970.023 7460.030 1940.018 1510.035 3200.023 7900.018 9600.028 2920.031 8800.019 7310.019 5330.032 6330.016 2380.018 2930.016 5180.017 4150.019 1600.017 719206Pb/238U0.056 1880.053 1900.054 3580.055 4030.054 5090.056 7040.056 3420.057 0620.055 2300.055 5640.053 6410.054 3680.052 1280.054 4010.058 0310.052 2030.054 5090.052 7760.054 9730.057 0691s0.001 7980.001 1050.001 0910.001 4070.001 6520.001 2270.001 5440.001 2250.001 2490.001 3650.001 2860.001 1850.001 1480.001 3020.001 1050.001 0670.001 0420.001 0990.001 0730.001 347协和年龄/Ma207Pb/206Pb733.3366.7453.8383.4527.8279.7583.4433.4353.8538.9664.8368.6366.7500.0344.5387.1344.5466.7442.6409.31s218.5119.4111.1144.4197.298.1155.5120.4109.2148.1338.998.1124.1165.781.589.897.2102.8107.490.7207Pb/235U364.3332.7351.2338.0348.8344.5384.8368.1338.6368.8386.1343.6325.2349.7357.3338.2339.7334.7354.2360.01s28.413.714.217.321.713.124.616.813.820.022.114.314.423.511.613.312.012.713.712.6206Pb/238U352.4334.1341.2347.6342.1355.5353.3357.7346.5348.6336.8341.3327.6341.5363.6328.0342.1331.5345.0357.81s11.06.86.78.610.17.59.47.57.68.37.97.27.08.06.76.56.46.76.68.2?单位：?京?科技有限公司20第42卷 第1期?等：新疆?尔?西期?伟?地球?学?征、年?学及地质?5?T a b l e 5S t a t i s t i c a l t a b l e o f i s o t o p e d a t i n g d a t e o f r a r e me t a l p e g ma t i t e i nA l t a i o r o g e n i c b e l t序号12345678910111213141516171819202122232425262728293031323334353637383940414243444546采样位置大喀拉苏小喀拉苏/可可托海可可托海可可托海可可托海可可托海阿祖拜大喀拉苏小喀拉苏也拉曼那森恰清河拜兴也留曼布鲁克特加曼哈巴加曼哈巴也留曼阿克巴斯塔乌且别林大喀拉苏大喀拉苏虎斯特柯鲁木特可可托海可可托海可可托海可可托海胡鲁尔群库尔群库尔群库尔库吉尔特858号脉库吉尔特13号脉可可托海3号脉库吉尔特13号脉库尔特8号脉可可托海3号脉可可托海可可托海库威18号脉四矿554脉托麻尔布拉克5号脉库威481号脉可可托海3号脉测试对象白云母白云母/?带白云母外带,中带白云母白云母全岩,白云母,磷灰石?,?,?锆石白云母白云母白云母全岩白云母白云母锆石锆石锆石锆石锆石锆石锆石锆石锆石锆石锆石锆石锆石锆石锆石锆石锆石锆石锆石白云母白云母白云母白云母白云母白云母白云母白云母白云母白云母白云母白云母全岩测试方法40Ar-39Ar法40Ar-39Ar法Rb-Sr?-Ar法Ar-Ar法Rb-Sr等时线Rb-Sr等时线S?RIMP 锆石Ar-Ar法Ar-Ar法Ar-Ar法Rb-Sr 等时线Ar-Ar法Ar-Ar法U-Pb法U-Pb法U-Pb法U-Pb法U-Pb法U-Pb法U-Pb法U-Pb法U-Pb法U-Pb法U-Pb法U-Pb法U-Pb法U-Pb法U-Pb法U-Pb法U-Pb法U-Pb法U-Pb法?-Ar法?-Ar法?-Ar法?-Ar法?-Ar法?-Ar法?-Ar法?-Ar法?-Ar法?-Ar法?-Ar法?-Ar法Rb-Sr 等时线采样位置/48?11?1.4?86?52?40.7?46?45?24.7?90?16?8.1?48?26?9?86?30?45.6?48?26?7.9?86?30?49.4?48?11?11?86?52?49.6?48?02?1.4?87?20?38.4?48?05?27.9?87?24?5.7?47?36?40.3?88?19?49.9?47?37?35.2?88?28?31.6?47?38?51?88?54?52.8?47?54?55.9?89?02?12.6?47?12?51.9?89?51?46?47?16?39.4?89?47?18?47?15?02?89?49?1.1?47?11?38.2?89?48?58.8?47?43?54.1?88?30?52.8?47?48?16.7?88?47?35.5?47?47?19.7?88?48?20.5?47?46?54?88?50?39.1?47?14?00?E89?49?30?47?14?00?89?49?30?47?13?00?89?49?30?47?14?00?89?49?30?47?14?00?89?49?00?47?13?00?89?49?30?47?13?00?89?49?30?47?13?00?89?49?30?47?24?00?89?29?00?47?22?10?89?22?10?47?22?20?89?23?00?47?24?40?89?29?30?47?13?00?89?49?30?年龄/Ma248.42?2.11233.79?0.41331.9?1.5120?292177.9?0.3,169?3238?2.5218.4?5.8220?9,198?7,213?6151.41?2.5240.86?3.53227.86?6.53426?13447.7?0.4436?0.5476?12275.5?4.2237.5?2.6269.4?1.6263.8?1.6249.7?0.7240.5?1.4272.5?1.4270.1?1.7244.3?1.1202.9?0.8212.7?2.5190.6?1.2180.7?0.5208.1?0.8246.8?1.2199.1?1.0212.2?1.7206.8?1.6221.7169.6117.2195.3211.4215.4245.7257.9195.7181.7151.8167.9331.9资料来源?17?17?23?23?19?24?24?18?20?17?25?4?26-27?21新疆地质2024年成矿?。?有?伟?年?学研究?明，?尔?有?成矿期主要?中?印支期?期。研究?，?尔?世基本形成?21-22?，之?定的?，有?成矿流体的?成矿，为?有?矿?的形成创?。5.3?地?尔?伟?可?为?源和?源?类?23?，?中?源?可?为?质?、?合交?和?3类伟?。?成?和矿?，?质?伟?由?质?和?作?形成，与?合?和?类?有关，成?单?矿?合交?作?伟?质?地?和交?作?外，可能有来自?部物质-?热?流体?合形成?矿?的伟?伟?，由?出来的?“?”?“?”的?所形成的伟?，常?体?形成?伟?业?伟?有?伟?伟?的?，是?有?矿?成矿的?要伟?。?源伟?为?基性和?性?基性?系?，?基性主要?的伟?，可?内外接?形成Nb-REE-Zr矿?，?性?基性?形成的伟?主要形成?-REE-Nb-Zr矿?27?。本?的伟?品地球?学?征?、?质?征，为?源?伟?。?入?质?中，?矿?，成?上与?合?的?关系?，据?为?质?伟?。基?地球?学?征，Cerny?出伟?成?类，?伟?为LCT?（?Li，Cs，Ta，Be，Ga，Sn等）、NYF?（?Nb，Y，F，Zr，Th，U及REE）与NYF?LCT?合?。本?的伟?品?U，Th，Nb，Y，?f?，?低?总?征，与 LCT?NYF?LCT?合?地球?学?征?，?可能为NYF?伟?。研究?明，全球LCT?伟?产?，形成时?全球?及?大?合的时?28-29?，?常与?地?形成的?质?有关?30?。LCT?伟?是?的?质?体系?的产物，?主要形成?，形成?作?的地?之?的?。从?中可?出（?11），所有?品?入“VAG”区内?Yb-Ta?中（?12），?伟?品?“VAG”区内，?尔?伟?品?入“VAG”和“syn-COLG”，?“VAG”向“syn-COLG”?的?。?形成?。本?伟?的形成时?为（343.7?1.7）Ma，为?世?入?。?为?世?尔?地区?-?，为?，?，?非?有?矿?的形成。?1?Fig.1?Statistical histogram of rare metal pegmatite inAltai orogenic belt?11?b?Ta-Rb?Fig.11?b?Ta-Rb discrimination diagram of pegmatite?12?b-Ta?Fig.12?b-Ta discrimination diagram of pegmatite22第42卷 第1期?等：新疆?尔?西期?伟?地球?学?征、年?学及地质?合区域上的研究，我?为?尔?地区?生?为?生?，为?，形成的伟?为NYF?伟?，?矿?成矿。?生?期?中生?期?，出?-?-?的?局，之?入?内?，?体系由?为?，?地?物质?，形成?有?伟?1,17,31?，?能?印支期-?为?尔?伟?矿?的?成矿期。6 结论（1）?伟?年?为（343.7?1.7）Ma，为?世伟?，是?西期?的产物。（2）?尔?地区?西中期伟?为?质成?，可能为NYF?伟?。（3）?尔?地区?生?为?生?，?，?中?，?流?性?的?体-流体?定?来，?形成?有?伟?矿?。?1 王登?,?人,?刚,等.伟?矿?的研究?J.地球科学?,2004,19(4):614-620.2?,?人.?论新疆?尔?伟?的成?J.新疆矿产地质,1989,(1):60-70.3 王登?,?,?.?尔?有?矿?的类?与?J.矿?地质,1998,(?刊):25-28.4 任?,张?,?,等.?尔?伟?年?学及?地质?J.矿物学?,2011,31(3):587-5965 Williams A E,McKibben M A.A brine interface in the Salton SeaGeothermal System,California:Fluid geochemical and isotopiccharacteristicsJ.Geochimica and Cosmochimica Acta,1989,53(8):1905-1920.6 Cerny P,Goad B E,Hawthorne F C,et al.Fractionation trends of theNb and Ta bearing oxide minerals in the Greer Lake pegmatiticgranite and its pegmatite aureole,southeastern ManitabaJ.Ameri-can Mineralogist,1986,(71):501-517.7?,?发,?,等.?尔?尔?地区?形成时?及成?类?J.新疆地质,2001,(4):292-296.8 Hu A Q,John B M,Zhang G X,et al.Crustal evolution and Phanero-zoic crustal in northern Xinjiang:Nd isotopic evidence.Part?Iso-topic characterization of basement rockJ.Tectonophysics,2000,(328):15-51.9?,?,?行,等.?尔?基?的?J.矿物学?,2015,35(S1):525-526.10?刚,?,?华,等.中国?尔?、?与成矿作?J.新疆地质,2013,31(Z1):8-14.11 Andersen T,Correction of common Pb in U-Pb analyses that do notreport204PbJ.Chemical Geology,2002,192:59-79.12 张?.?-热?体系中?元?地球?学行为及?新疆?尔?3号伟?研究为?D.中国科学院地球?学研究所,2001.13 张?,?从?.新疆?尔?可可?3号伟?矿物中?元?