新疆阿尔泰友谊峰地区木孜他乌岩体锆石U-Pb年龄及地质意义
Zircon U-Pb Dating of the Muzitawu Plutons from the Friendship Peak Region in Altay, Xinjiang and Its Geological Significance
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摘要: 新疆阿尔泰造山带南缘发育有大量的花岗岩，前人对阿尔泰造山带东段花岗岩的形成时代和构造环境等方面进行了大量的研究，而对西段研究较为局限。木孜他乌岩体位于新疆阿勒泰布尔津县境内友谊峰西木孜他乌一带，主要由黑云母花岗岩、斑状黑云母正长花岗岩、白云母正长花岗岩组成。岩体内花岗伟晶岩脉发育，并具有稀有金属矿化显示。运用LA-ICP-MS锆石U-Pb方法对木孜他乌岩体进行年代学研究，获得斑状黑云母正长花岗岩锆石206Pb/238U加权平均年龄为（198.3±3.8） Ma（MSWD=2.0），表明该岩体形成于早侏罗世，与阿尔泰造山带东段伟晶岩脉型稀有金属成矿时代基本一致，为研究本区伟晶岩型稀有金属-白云母-宝石等成矿作用时代提供了年代学约束。Abstract: Large quantities of granites are developed in the southern margin of Altay orogenic belt. The previous studies have focused on the formation age and structural setting of the granites from the eastern section of Altay orogenic belt, but the research its western section is still limited.Muzitawu Plutons are located in Muzitawu area of Western Friendship Peak, Burqin County, Altay, Xinjiang, which are mainly consist of biotite granite, porphyritic biotitesyenogranite and muscovite syenogranite.In these plutons, the pegmatite veins are very developed, with rare metal mineralization. The LA-ICP-MS zircon U-Pb method was used to study the chronology of porphyritic biotitesyenogranite, and the zircon 206Pb/238U weighted average age of the plutons is (198.3±3.8)Ma (MSWD=2.0), indicating that these plutons were formed in early Jurassic. This age is basically in line with the metallogenic epoch of pegmatite vein-type rare metals in the eastern section of Altay orogenic belt, which provides a chronological restriction for the study on the mineralization epoch of rare metal-muscovite-gemstone relating to pegmatite in this area.
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Key words:
- metallogenic epoch /
- zircon U-Pb dating /
- Muzitawupluton /
- Friendship Peak /
- Altay /
- Xinjiang
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李艳广,王双双,刘民武,等.斜锆石LA-ICP-MS U-Pb 定年方法及应用[J].地质学报,2015, 89(12):2400-2418.
LI Yanguang, WANG Shuangshuang, LIU Minwu, et al.U-Pb dating study of baddeleyite by LA-ICP-MS:Technique and application[J].Acta Geologica Sinica,2015, 89(12):2400-2418.
刘锋,杨富全,毛景文,等.阿尔泰造山带阿巴宫花岗岩体年代学及地球化学研究[J].岩石学报,2009,25(6):1416-1425.
LIU Feng, YANG Fuquan, MAO Jingwen, et al.Study on chronology and geochemistry for Abagong granite in Altay orogen[J].Acta Petrologica Sinica, 2009, 25(6):1416-1425.
刘锋,张志欣,李强,等.新疆可可托海3号伟晶岩脉成岩时代的限定:来自辉钼矿Re-Os定年的证据[J].矿床地质,2012,31(5):1111-1118.
LIU Feng, ZHANG Zhixin, LI Qiang, et al.New age constraints on Koktokay pegmatite No.3 Vein, Altay Mountains, Xinjiang:Evidence from molybdnite Re-Os dating[J].Mineral Deposits, 2012, 31(5):1111-1118.
刘伟.中国阿尔泰地区花岗岩的时代及成因特征[J].大地构造与成矿学,1990,14(1):44-56.
LIU Wei.Petrogenetic epochs and peculiarities of genetic types of granitoids in the Altai MTS.,Xinjiang uygur autonomous region, China[J].Geotectonica et Metallogenia, 1990, 14(1):44-56.
任宝琴,张辉,唐勇,吕正航.阿尔泰造山带伟晶岩年代学及其地质意义[J].矿物学报,2011,03(31):587-596.
REN Baoqin, ZHANG Hui, TANG Yong, et al.LA-ICPMS U-Pb Zircon Geochronology of the Altai Pegmatites and Its Geological Significance[J].Acta Mineralogica Sinica, 2011, 03(31):587-596.
童英.阿尔泰造山带晚古生代花岗岩年代学、成因及其地质意义[D].中国地质科学院,2006:12-101.
TONG Ying.Geochronology, Origin of late Paleozoic granitoids from the Altai orogen in China and their geological significance[D].Chinese Academy of Geological Sciences, 2006:12-101.
王登红,陈毓川,徐志刚.新疆阿尔泰印支期伟晶岩的成矿年代学研究[J].矿物岩石地球化学通报,2003, 22(1):14-17.
WANGD H, CHEN Y C, XU Z G.40Ar/39Ar Isotope Dating on Muscobites from Indosinian Raremetal Deposits in Central Altay, Northwestern China[J].Bulletin of Mineralogy, Petrology and Geochemistry, 2003, 22(1):14-17.
王涛,童英,李舢,等.阿尔泰造山带花岗岩时空演变、构造环境及地壳生长意义-以中国阿尔泰为例[J].岩石矿物学杂志,2010,29(6):595-618.
WANG Tao, TONG Ying, LI Shan, et al. Spatial and temporal variations of granitoids in the Altay orogen and their implications for tectonic setting and crustal growth:perspectives from Chinese Altay[J].Acta Petrologica et Mineralogica, 2010, 29(6):595-618.
王星,蔺新望,赵端昌,等.阿尔泰北部喀纳斯群碎屑岩锆石U-Pb同位素年龄及其意义[J].西北地质,2016, 49(3):13-27.
WANG Xing, LIN Xinwang, ZHAO Duanchang, et al.U-Pb dating of detrital zircons from the Kanas group in northern Altay and its geological significance[J]. Northwestern Geology, 2016, 49(3):13-27.
王中刚,赵振华,邹天人,等.阿尔泰花岗岩类地球化学[M]. 北京:科学出版社,1998:1-152.
WANG Zhonggang, ZHAO Zhenhua, ZOU Tianren, et al.Geochemistry of Granitoids in Altay, Xinjiang[M]. Beijing:Science Press, 1998:1-152.
吴元保,郑永飞.锆石成因矿物学研究及其对U-Pb年龄解释的制约[J].科学通报,2004,49(16):1589-1604.
杨富全,毛景文,闫升好,等.新疆阿尔泰蒙库同造山斜长花岗岩年代学、地球化学及其地质意义[J].地质学报,2008,82(4):485-499.
YANG Fuquan, MAO Jingwen, YAN Shenhao, et al.Geochronnlogy,geochemistry and geological implications of the Mengku synorogenic Plagiogranite Pluton in Altay,Xinjiang[J].Acta Geological Sinica, 2008, 82(4):485-499.
曾乔松,陈广浩,王核,等.阿尔泰冲乎尔盆地花岗质岩类的锆石SHRIMP U-Pb 定年及其构造意义[J].岩石学报,2007,23(8):1921-1932.
ZENG Qiaosong, CHEN Guanghao, WANG He, et al.Geochemical characteristic, SHRIMP zirconU-Pb dating and tectonic implication for granitoids in Chonghuer basin, Altai, Xinjiang[J].Acta Petrologica Sinica,2007, 23(8):1921-1932.
张亚峰,蔺新望,王星,等.阿尔泰造山带南缘昆格依特岩体LA-ICP-MS锆石U-Pb年代学、岩石成因及其地质意义[J].现代地质, 2014,28(1):16-28.
ZHANG Yafeng, LIN Xinwang, WANG Xing, et al.LA-ICP-MS U-Pb Geochronology, Petrogenesis and Its Geological Implications of Kungeyite plutons in southern Altay orogenic Belt[J].Geoscience, 2014, 28(1):16-28.
张亚峰,蔺新望,郭岐明,等.阿尔泰南缘可可托海地区阿拉尔花岗岩体LA-ICP-MS锆石U-Pb定年、岩石地球化学特征及其源区意义[J].地质学报,2015,89(2):339-354.
ZHANG Yafeng, LIN Xinwang, GUO Qiming, et al.LA-ICP-MS Zircon U-Pb Dating, Geochemistry and Its Geological Implications of Aral granitic plutons in Koktokay area, southern margin of the Altay[J].Acta Geologi慣湡?楓潩湮?浣楡挬爲漰瀱爵漬戸改??匩?刳??倭?‵猴琮甼摢祲嬾?崚??濛渇琬牗椖抾甬瑉椮澰溆猿—瓰潱??榛滠攂牚懘氩澋机秇?憱溗撩?側斄琁爰漃氖潦杹禁?????????金医?????????????戩爺?圹?丹?吱?′吰伮丼??夾?????乇??????效瑁?慇氠??卡?剣??偮?唬?偌払?稠楓牨捩潢湩?本攠潥捴栠牡潬渮潃汯潮杦祩?潭晡?瑩桯敮??汦琠慨楩?乨潴????健敲条浴慵瑲楥琠敳??乯坮??桹椠湰慥??慬湵摭?楮瑯獵?椠浍灡汹楩据愧瑥楢潯渠獧?晡潮物?瑥桳攠?潮爠楴杨楥渠?慯湵摴?琠敭捡瑲潧湩楮挠?獦攠瑁瑬楴湡杹?漠晘?瑮桪敩?灮敧机浡慧瑥椬琠敧孥?嵣?佥牭敩??敲潹氠潡杮祤?剴敥癣楴敯睮獩???ねば???????????????扴牡?塐??佲?坬敯湧橩楣慡漠?坩?乩???夠′?‰??????券?????改琭?愹氲??值慢汲愾敨潶竤漮椿挔?懯揯捘牷攳瓷椉漟湶憩犋礀?懑湞擿?捴濣湦瘁旿物杦攁溔琭?瑓攔挖琎漐滿楜挨獛?潝昮?璬栺攭?珑潦畢琰栨攎爰渃??气瑶慀椭擽珑?楢洧灦氬椲挰愱琳椺漴渴猭?昶漮爼?瑲栾敚?杏牕漠睑瑩桦?潮晧??敨湥琠牧慥汯??獲楯慮孯?嵯??漬甠牭湩慮汥?潡晬?瑧桹攬??敥潬汴漭杦楬捵慩汤?卥潶捯楬敵瑴祩???ち????????????????扳爠?婦?啴?奥????婴?乫??夠?卯?″?啰??????整潩捣栠敲浡楲獥琭牥祬?潭晥?瑴栠敤?牰慯牳敩?洬攠瑁慬汴扡敩愬爠楃湨杩?灡敛杄浝愮琠楓瑵数?乲潶???癲攺楑湩?愠湋搠?爮敂汥慩瑪敩摮?机牉慮湳楴瑩整獵?楥渠?瑦栠敧??敬歯敧瑹甠潡桮慤椠?牥敯杰楨潹湳???氬琠慃票??潥畳湥琠慡楣湡獤??乹漠牯瑦栠睳散獩瑥??桥楳渠慕孮?嵶??潳畩牴湹愠汯?漠晃??獮楥慳湥??慣牡瑤桥?卹挠楯敦渠捓散獩???づび??′日????????.
ANDERSON T.Correction of common Pb in U-Pb analyses that do not report 204Pb[J].Chemical Geology,2002,192(1-2):59-79.
CAI K D,SUN M,YUAN C,et al.Geochronological and geochemical study of mafic dykes from the northwest Chinese Altai:Implications for petrogenesis and tectonic evolution[J].Gondwana Research, 2010, 18(4):638-652.
CHAPELL B W, WHITE A J R. Two contrasting granite types[J]. Pacific Geology, 1974, 8:173-174.
CONDIE K C. Plate tectonics and crustal evolution[M]. Oxford:Pergamon press. 1989:1-476.
LV Zhenghang, ZHANG Hui, TANG Yong, et al. Petrogenesis and magmatic-hydrothermal evolution time limitation of Kelumute No. 112 pegmatite in Altay, Northwestern China:Evidence from zircon U-Pb and Hf isotopes[J].Lithos, 154(1):2012, 374-391.
LUDWIG K R.Isoplot/Ex version 2.49. A Geochronological Toolkit for Microsoft Excel[J].Berkeley:Berkeley Geochronology Center Special Publication No.1a,2003,1-56.
SENGÖR A M C,NATAL'IN B A,BURTMAN V S.Evolution of the Altaid tectonic collage and Paleozoic crustal growth in Eurasia[J].Nature,1993,364(22):299-307.
VAVRA G,GEBAUER D,SCHMID R,et al.Multiple zircon growth and recrystallization during polyphase Late Carboniferous to Triassic metamorphism in granulites of the Ivrea Zone (Southern Alps):
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