新疆库地北喀拉斯坦代里牙一带中元古代石英闪长岩年代学、地球化学特征及地质意义.pdf

新疆地质XINJIANGGEOLOGY2024年3月Mar.2024第42卷 第1期Vol.42 No.1?新疆国?源?新疆?库地?1?5?区域地质矿产?查?目（XJD?JJZ2011-4）?日期?2023-10-25?日期?2024-01-09?(1984-)，?，?人，?，?，2010年7月?业?中国地质大学（?京）?地质学专业，?主要从事区域地质?查?作?E-mail:?地北?学?地球化学特征及地?，张?，李?（?区?地质调查院，?065000）?库地?中?定出中元?，?开?地质学、?学、?地球?学和?位?年?学研究。?SiO2含?54.55?55.84?，MgO含?5.42?5.65?，Ti2O含?1.15?1.57?，Mg?为57?58，?数?为1.57?1.80，?性系?。?元?总?REE为150.5?10-6?183.68?10-6?(La/Yb)N为1.98?2.27，(La/Sm)N为1.39?2.08，(Gd/Yb)N为1.00?1.01，?Eu?1.03?1.11。?U-Pb年?为（1 130.3?5.6）Ma。西?库地?形成时?为中元?期，?类?，由地?与?形成，形成?大?，是Rodinia?大?合?向?木?的地质?录。?西?地?Rodinia?大?中元?木?为是 Rodinia?大?的?部?，?和?研究?，?国等研究西?库?和中?1?，?U?Pb 年?为（1 423?19）Ma，时?为中元?，?期?，为?木?的?-?证据。?等研究?为年?为1 301?1 000 Ma?2?，?和西?内?性质的“A”?为主。?等研究中元?体?大?类?3?，与库地?向?木?有关。?等?为新疆?库地-西合?发?为?中元?大?地域从?体?形成?合的?4?，中元?末期?大规?-?，?与?元?末期?，也?非?的?接?。?等研究新疆西?-西?，?为?地区?可?为?元?、?生?和?生?3期?5?。?地理?件及交?件的限?，?研究?，?规?产生?大?。库地?木?地?、?生?合?及?地?，是研究?的理?地区。本文?库地?发?的?开?年?学、?学和全?地球?学的研究，为研究?和?据。1 区?地?景1.1?地质?新疆库地?位?-?西?和库地-?之?，?地?、?生?合?和?地?，是研究西?地区?的有?地?。库地?部?西?地?，发?系?查?，西?和?西?之?生?合?，发?统?群和上?统库尔?群，?群和库尔?群是库尔?-?的?。?群主要是?系?库尔?群为?-?，主要?性为?、?、?和?。西?和库地-?热?之?库地-?，发?中?世?质?，?NW-EW向?形?，?基质为?、?、?、?、?、?编?1000-8845(2024)01-025-08?P597?P59?A新疆地质2024年?等，?的?和?作?，基质发生?质，?发?理。库地-?热?地?，主要发?中元?群。1.2地质?者?库地?查?明，?中?世?质?中，与基质?接?，?面形态?，出?200?400 m（?1）。?，?自形?，?，由?、?、?、?和?成，?（50?55?）?自形?，?，?0.2?2 mm，?形?，?，?为0.1?0.5 mm，局部交?，含?10?（10?）?形?，?，?0.1?1 mm，?合体?、?、?，?，?，?0.1?2 mm，?矿物含?35?40?，?矿物有?、?矿、?矿（?2）。2?分?分?2.1?者?行系统地质?查，?2件?地球?学?品和1件?位?年?品。?位?年?品?5.37?g，?自?，?邻?的?群?部?（N 36?49?12?、E 77?13?10?），?的 LA-ICP-MS定年研究。2.2?地球?学?由?区域地质矿产?查研究所?成，主?元?法?品，?AxiosmaxX?成?，?2?，?、?2O?和?2O?P1 245电子?成?。?元?和?元?1?地地?地质?Fig.1 Simplified geological map of Kudi area（据?西?地质?查院?，2004）1.第?系?2.库尔?群?3.?群?4.?群?5.?查?6.?群?7.?8.?9.中?世?10.中?世?11.?世?12.中?世?13.中元?14.地质?15.?区?16.?17.?位?取?位?18.?区26第42卷 第1期?等：新疆库地?中元?年?学、地球?学?征及地质?法?品，?X Serise2等?子体质?成?，?5?6?。?年?品由?区域地质矿产?查研究所?行?选。?目?据?、自形?、形态等?征?类，?选出?有?性的?，?与?入?成的?品?中，?行?，直到?品?出?的?面，?发?上?行?。?位?的选取?据?和?行?选，?与CL?，?开内部?和?体，?的年?信?。?U-Pb定年由?地质研究所?成，?定年?的?为LA-MC-ICP-MS，所?定?位?的?和年?1?。3 地?学?、?自形?为主，从?中可?出（?3），?的内部?和?成?的?7?，Th/U?为0.4?1.16，?0.68，大?Th/U?（0.5），?征。?U-Pb年?果?1。本?定22?22?，15?和18?的207Pb/206Pb?面年?为 1 187.3?1 192.6 Ma，?，?20?的207Pb/206Pb?面年?为1105.2?1 145.1 Ma，?位?和?上（?4），?明?形成?U?Pb?位?体系?持?态。?207Pb/206Pb?年?（1 130.3?5.6）Ma（N?20，MSWD?0.81）（?4），?年?，形成时?为中元?末期。4?地球化学库地地区?的主?元?和?元?果及?关?数?2。4.1主?的SiO2含?为54.55?55.84?，?中性?从?中可?出（?5），?中发?，为?Al2O3含?为 15.41?15.43?2O 含?为1.89?2.41?Na2O含?为2.37?2.47?CaO含?为7.33?7.89?MgO（5.42?5.65?）含?，Mg?为57?58?Ti2O 含?为 1.15?1.57?A/CN?为 0.77?081，?质?数?1.57?1.80，?性系?从?中可?出（?6），?品?入?性区域，从?中可?出（?7），?品?入?性系?。4.2?元?总?，?REE为150.5?10-6?183.68?10-6?(La/Yb)N为1.98?2.27，?低，?(La/Sm)N为1.39?2.08，?(Gd/Yb)N为1.00?1.01，?Eu?1.03?1.11，?常。从?中可?出（?8），?向?的?，?2?地?Fig.2 Field and microstructure photographs ofthe basalt from the?uart?diorite in north Kudi?3?-Pb?发?Fig.3?ircon CLimages from?uart?diorite27新疆地质2024年?，?。从?9可?出，大?子?元?Rb，Ba?，Sr，?，?元?Th，U，Zr，?f，Y，Yb?，P，Ti?，?元?Ti，P?。5 讨论5.1?U-P b?外?查?明，?库地?合?生?质?中，?热?群?中，?库?木?中?世?群?与?接?西?中?世?群?与?接?，?等?库地?西?群?部?U-Pb年?（519.5?1.2）Ma?13?张传?等?为?群?为?地体最主要的?单元?14?，是从?木西?出的?，?明?生?中发?质基?-?中?世?，?来源?。?者?据?外地质?，?为?形成?4?地?LA-ICP-MS?-Pb?Fig.4?-Pb concordia diagram of the?ircon from?uart?diorite in north Kudi?1?地?L A-I C P-MS?U-P b?T a b l e 1L A-I C P-MSz i r c o nU?P bd a t a o f Q u a r t z d i o r i t e i nn o r t hK u d i?号P20TW112345678910111213141516171819202122元?含?/10-6Pb16022418214224522225191119179222114132205155215179531551179376U7691 0268117241 0671 0531 2004346118639695666159076981 005834252738551461372Th615952826290123667662115819022985437356694365696370978434292185183Th/U0.80.931.020.41.160.640.520.360.310.270.880.660.921.040.940.960.850.310.590.530.40.49?位?207Pb/235U?1.964 82.012 62.035 02.055 92.008 52.043 22.065 92.163 02.049 32.166 12.081 41.911 21.964 11.978 42.077 31.913 11.990 02.296 12.030 02.049 12.037 91.996 01?0.028 90.029 80.029 60.029 70.029 20.029 50.029 90.031 60.029 80.031 20.030 00.027 70.028 60.028 60.030 70.028 10.029 40.034 30.029 40.029 90.029 60.029 6206Pb/238U?0.183 70.187 40.189 40.191 30.188 70.191 20.193 10.205 00.191 40.203 40.195 60.181 50.184 40.186 50.188 70.179 60.186 20.209 20.189 70.192 70.189 70.188 21?0.002 00.002 10.002 10.002 10.002 10.002 10.002 10.002 30.002 10.002 20.00210.002 00.00210.002 00.002 10.002 00.002 10.002 30.002 10.002 20.002 10.002 1207Pb/206Pb?0.077 60.077 90.077 90.077 90.077 20.077 50.077 60.076 50.077 70.077 20.077 20.076 40.077 20.076 90.079 80.077 30.077 50.079 60.077 60.077 10.077 90.076 91?0.0010.0010.0010.0010.0010.0010.0010.0010.0010.0010.0010.0010.0010.0010.0010.0010.0010.0010.0010.0010.0010.001年?/Ma206Pb/238U?1 0871 1071 1181 1291 1141 1281 1381 2021 1291 1941 1511 0751 0911 1031 1151 0651 1001 2241 1201 1361 1201 1121?12131212121213131213131212121212121412131213207Pb/235U?1 1041 1201 1271 1341 1181 1301 1381 1691 1321 1701 1431 0851 1031 1081 1411 0861 1121 2111 1261 1321 1281 1141?16171616161616171617161616161716161816171616207Pb/206Pb?1 1361 1441 1451 1451 1271 1341 1371 1081 1381 1271 1261 1051 1271 1191 1931 1281 1351 1871 1371 1251 1451 1191?26252525252525262525252525252526262625252526?和?/%100100999910010010010099100100100100999910010110010010110010128第42卷 第1期?等：新疆库地?中元?年?学、地球?学?征及地质?年?为（1 130.31?5.6）Ma，?合?外地质事?，?中元?期。5.2?5.2.1?为?SiO2含?为 53?60?，MgO含?大?4?，Mg?大?45?15?。?主要?2?地?主?T a b l e 2A n a l y t i c a l r e s u l t s a n ds o me p a r a me t e r s o fQ u a r t z d i o r i t e i nn o r t hK u d i?号SiO2TiO2Al2O3Fe2O3FeOMnOMgOCaONa2O?2OP2O5?2O?2O?Mg?A/CN?RbSrBaNbTaZr?fThVCrScULaCePrNdSmEuGdTbDy?oErTmYbLuY?REE?Eu(La/Yb)N(La/Sm)N(Gd/Yb)NP20YQ155.8401.15015.4101.9205.3800.1185.4207.3302.4702.3400.2051.6200.1002.2301.80058.0000.770129.100328.000682.80026.6602.010230.5009.57026.620152.00061.90025.7003.32021.74045.1806.16026.4106.5802.1806.2101.3208.5401.8605.1000.8804.9400.60045.990183.6801.0302.9702.0801.020P20YQ254.5501.57015.4301.4306.3000.1255.6507.8902.3701.8900.3261.5700.1002.2701.57057.0000.810107.700293.200706.10032.7202.220293.30016.76012.860182.100180.20029.3101.38013.53031.5704.69022.0706.1302.1805.7101.2508.1501.7604.7900.8304.6000.56042.690150.5001.1101.9801.3901.000?：主?元?单位为%?、?元?单位为 10-6?7?SiO2-K2O?Fig.7 SiO2-K2O diagram of?uart?diorite（据?文?10）?6?SiO2-K2O?Na2O?Fig.6 SiO2-K2O?Na2O diagram of?uart?diorite（据?文?9）?5?TAS?Fig.5?AP diagram of?uart?diorite（据?文?8）29新疆地质2024年?为4类，?SiO2含?大?52?，MgO含?大?8?，TiO2含?0.5?为?征，是?之上?地?含?部?形成?Bajaites 是?，?Sr（大?1 000?10-6）、?Ba（大?1 000?10-6）和?/Rb（大?1 000），?为是地?与来自?Si?体?形成?SiO2（大?56?）、?Sr（大?400?10-6）、低?REE（Yb?1.9?10-6），是年?的热?地?部?形成?常出?，?产出?本?，?MgO，Cr和Nr为?征，?常由?方?等矿物?成，?源区为交?地?16?。Rapp等研究?为?质?地?生成Mg?大?45?的中性?17?，?2O/Na2O?1，地?物质?与成?时，?体的Mg?大?50。?SiO2含?为 54.55?55.84?，MgO含?为5.42?5.65?，Mg?为57?58，?。从?中?出（?10），?MgO、Mg?和Cr（?121.05?10-6）与?（MgO?6?，Mg?60，Cr?100?10-6）?，?明?质?(La/Yb)N为1.98?2.27，?源区成?，?源区由地?与?形成，形成?类?本?。大?子?元?元?到?流体中，?成?源?的流体?明?低的Nb/U?（0.22），?的中?性?低的Nb/U?19-20?。?Nb/U为8.01?23.71，?15.4，与?Nb/U（14?22）?，?明?到?流体?。5.2.2?地质?本文?质?，形成?类?本?从?11中可?出，?品?入?区，?明?形成?从?中可?出，?品?入大?区域（?12），?明?形成?大?。?性系?，与?性?（?CA）?的地?（40?67?m）?23?，据?R?Fig.?Chondrite normali?de R?patterns of?uart?diorite（据?文?11）?地?Fig.?Primiti?e mantle normali?de incompatibalelement diagram of?uart?diorite（据?文?12）?1?Fig.1?The discrimination diagrams for?MA（据?文?18）?11?r-Nb?r?Fig.11?r-Nb?r diagrams of?uart?diorite（据?文?21）30第42卷 第1期?等：新疆库地?中元?年?学、地球?学?征及地质?60?公?计?地?为32?40?m，?明?形成?地?。?国等研究?为?1?，?中元?期形成的统?中国?生?期发生?等研究?为?2?，1 301?1 000 Ma?和西?明?内?征，1 567?1 301 Ma西?与?木地?可能发生最?合作?张传?等?为?14?，?群?为?地体最主要的?单元，是Rodinia?大?从?木西?出来的?。?为中元?木?和西?地体之?，?和?系?群?Rodinia?大?木?，即中元?的形成与Rodinia?大?有关。?等研究?为?24?，?尔?Rodinia?大?汇?的时限为871?945 Ma?张传?等?出?木?新元?期（900 Ma）汇?到?大?25?，成为Rodinia?大?的?部?王?伟等研究?地?西部发?合、?年?和?f?位?与?尔?有关的?和?的?地?26?，?与Rodinia?大?合?尔?（1 080?980 Ma）及随?的?基本?合?等研究?地区?出?质?形?地?27?，中元?期?新元?中期?年?出?3?，?为788 Ma、947 Ma和1 118 Ma，?年?与?中元?期?新元?中期?事件大?，?地区?全球?的 Rodinia?大?的汇?事件，?证?木-?-?等地（?）?的?与?木及?子?非常?。?等研究?群是?木?地?的?要?成部?28?，为?、?，?U-Pb年?为（841.6?2.1）Ma，?时?为?，形成?内?张?期?的?。王世伟等研究?性?形成?作?29-33?。?人研究?明，中元?期-新元?期?Rodinia?大?合?，?木?汇?到?大?，?明?Rodinia?大?合?中?木?和?大?之?作?。本文?U-Pb年?为（1 130.3?5.6）Ma，时?为中元?期，?类?，形成?大?，?明中元?期?木?大?，?大?向?木?。6 结论西?库地?的?U-Pb年?为（1 130.3?5.6 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王世伟,?,?伟?.新疆?矿?地球?学?征J.新疆地质,2018,35(4):476-183.30?,?,?,等.中?尔?鲁?U-Pb年?和地球?学?征J.新疆地质,2018,36(2):151-158.31?,?,?,等.?地区?世?期?LA-ICP-MS?U-Pb?年、地球?学?征及地质?J.新疆地质,2017,35(3):227-234.32?,?行,?新,等.新疆?尔?尔?学及地球?学?征J.新疆地质,2016,34(1):68-75.33?,?.内?公?LA-ICP-MS?U-Pb定年及地球?学?征J.新疆地质,2015,33(4):529-536.Chronology?Geochemical Characteristics and Geological Significance of MiddleProtero?oic?uart?iorite in the Kalasitandaliya Area of Northern Kudi?in?iangBai Chundong,Zhang Xinzheng,Li Dian（Hebei region Geological Survey,Langfang,Hebei,065000,China）Abstract:Previous scholars have insufficient understanding of the pre Cambrian magmatic activity and tectonic evolu-tion in the northern margin of the West Kunlun Mountains,resulting in significant differences.The author identified theMiddle Proterozoic quartz diorite in the tectonic melange of the Kalastandailiya area in Kudi,and conducted geological,petrological,geochemical,and isotopic dating studies on it.The SiO2content of quartz diorite ranges from 54.55%to55.84%,MgO ranges from 5.42%to 5.65%,Ti2O content ranges from 1.15%to 1.57%,Mg#ranges from 57%to 58%,and the Rittmann index?ranges from 1.57 to 1.80,belonging to the high potassium calcium alkaline series.The totalamount of rare earth elements?REE ranges from 150.5 to 183.68 10-6;(La/Yb)Nranges from 1.98 to 2.27,(La/Sm)Nranges from 1.39 to 2.08,and(Gd/Yb)Nranges from 1.00 to 1.01,?Eu ranges from1.03 to 1.11.The U-Pb age of zirconobtained from quartz diorite is 1130.3 5.6 Ma.The formation of quartz diorite in the northern Kalastandailiya area of Ku-di in the western Kunlun Mountains dates back to the late Mesoproterozoic era,belonging to the Zanqi type high magne-sium diorite.It was formed by the reaction of mantle peridotite and subducted ocean sheets,and was formed in continen-tal island arc environment.It is the geological record of the subduction and subduction of oceanic crust towards theTarim block during the Rodinia supercontinent aggregation process.Key words:West Kunlun;South Kunlun Block;Rodinia supercontinent;Middle Proterozoic;Quartz diorite;Subduc-tion subduction32