内蒙古东升庙海西期岩体锆石U-Pb年龄及Hf同位素特征Zircon U-Pb Ages and Hf Isotopes of Hercynian Intrusion in Dongshengmiao,Inner Mongolia
吴亚飞;曾键年;曹建劲;吴政权;陈津华;周树达;陆顺富;李小芬;
摘要(Abstract):
东升庙岩体位于华北板块北缘西段,岩性主要为白云母二长花岗岩。采用LA-ICPMS锆石U-Pb微区定年和锆石微量元素及Hf同位素分析方法,对该岩体进行了系统的研究。花岗岩中几乎所有的锆石都显示典型的韵律振荡环带,Th/U比值较高(均大于0.1),锆石稀土元素球粒陨石标准化配分曲线呈左倾型,并显示明显的正Ce异常和负Eu异常,表明这些锆石为岩浆成因。测年结果显示,东升庙岩体形成年龄为(259.4±3.3)Ma,代表成岩年龄,属海西晚期侵入岩;部分核部继承锆石年龄加权平均值为(2 367±63)Ma,提供了该区古元古代结晶基底的年龄信息。锆石具有较均一的Hf初始比值,176 Hf/177 Hf介于0.282 125~0.282 362之间,εHf(259Ma)值为较低的负值(-17.3~-9.0),两阶段Hf模式年龄tDM2为1.91~2.11Ga,指示东升庙岩体起源于古元古代古老地壳部分熔融。对该岩体的综合研究有助于进一步认识和研究华北板块北缘的构造演化过程。
关键词(KeyWords): 东升庙花岗岩体;年代学;Hf同位素;岩石成因;华北板块
基金项目(Foundation): 国家自然科学基金重点项目(41030425)
作者(Author): 吴亚飞;曾键年;曹建劲;吴政权;陈津华;周树达;陆顺富;李小芬;
Email:
DOI:
参考文献(References):
- [1]任纪舜,姜春发,张正坤,等.中国大地构造及其演化:1∶400万中国大地构造图简要说明[M].北京:科学出版社,1990.
- [2]Tang Ke-dong.Tectonic development of Paleozoic fold belts at the north margin of the Sino-Korean craton[J].Tectonic,1990,9:249-260.
- [3]Tang Ke-dong.Tectonic evolution and minerogenetic regularities of the fold belt along the northern margins of Sino-Korean plate[J].Beijing:Peking University Press,1992,112-243(in Chinese with English abstract).
- [4]Windley B.Plorerozoic anorogenic magmatism and its orogenic connections[J].J.Geol.Soc.London,1993,150:39-50.
- [5]Xiao W J,Windley B F,Hao J,et al.Accretion leading to collision and the Permian Solonker suture,Inner Mongolia,China:Termination of the central Asian orogenic belt[J].Tectonics,2003,22(6):8-1-8-20.
- [6]江思宏,杨岳清,聂风军.内蒙古朱拉扎嘎成矿作用研究[J].矿物岩石地球化学通报,2000,19(4):229-230.
- [7]江思宏,杨岳清,聂凤军,等.阿拉善地区朱拉扎嘎金矿床硫、铅同位素研究[J].地质论评,2001,47(4):438-445.
- [8]皮桥辉,刘长征,陈岳龙,等.内蒙古霍各乞海西期侵入岩形成时代、成因及其与铜矿体的关系[J].矿床地质,2010,29(3):437-451.
- [9]王荃,刘雪亚,李锦轶.中国华夏板块与安加拉古陆间的板块构造[M].北京:北京大学出版社,1991.
- [10]王瑜.中国东部内蒙古-燕山造山带晚古生代晚期-中生代的造山作用过程[M].北京:地质出版社,1996.
- [11]邵济安.中朝板块北缘中段地壳演化[M].北京:北京大学出版社,1991:11-91.
- [12]Shi G H,Miao L C,Zhang F Q,et al.Emplacement age and tectonic implications of the Xilihot A-type granite in Inner Mongolia,China[J].Chinese Science Bulletin,2004,49(7):723-729.
- [13]罗红玲,吴泰然,李毅.乌拉特中旗克布岩体的地球化学特征及SHRIMP定年:早二叠世华北克拉通底侵作用的证据[J].岩石学报,2007,23(4):755-766.
- [14]罗红玲.华北板块北缘中段二叠纪的岩浆作用及构造意义[D].北京:北京大学,2007.
- [15]陈斌,赵国春.内蒙古苏尼特左旗南两类花岗岩同位素年代学及其构造意义[J].地质论评,2001,47(4):361-366.
- [16]张炯飞,庞庆邦,朱群,等.内蒙古白音宝力道花岗斑岩锆石UPb定年:金矿成矿主岩的形成年代[J].地质通报,2004,23(2):189-192.
- [17]张宗清,袁忠信,唐索寒,等.白云鄂博矿床年龄和地球化学[M].北京:地质出版社,2003.
- [18]罗红玲,吴泰然,赵磊.华北板块北缘乌梁斯太A型花岗岩体锆石SHRIMP U-Pb定年及构造意义[J].岩石学报,2009,25(3):515-526.
- [19]内蒙古自治区地质矿产局.内蒙古自治区区域地质志[M].北京:地质出版社,1991.
- [20]王鑫琳.东升庙地区二叠纪花岗岩研究[D].北京:北京大学,2007.
- [21]Peng Y M,Zhai Y S.The confirmation of the metamorphic double-peaking volcanic rocks in the Langshan group Dongshengmiao ore distict,Inner Mongolia and its significance[J].Earth Science:Journal of China University of Geosciences,1997,22(6):589-594.
- [22]Yuan H L,Gao S,Liu X M,et al.Accurate U-Pb age and trace element determinations of zircon by laser ablation-inductively coupled plasma mass spectrometry[J].Geostand Geoanaly Res.,2004,28(3):353-370.
- [23]Andersen T.Correction of common lead in U-Pb analyses that do not report 204Pb[J].Chem.Geol.,2002,192:59-79.
- [24]Ludwig K R.Users manual for Isoplot 3.00:A geochronological toolkit for Microsoft Excel[J].Berkeley Geochron.Cent.Spec.Pub.,2003(4):25-32.
- [25]徐平,吴福元,谢烈文,等.U-Pb同位素定年标准锆石的Hf同位素[J].科学通报,2004,49(14):1403-1 410.
- [26]Vavra G,Gebauer D,Schmid R.Multiple zircon growth and recrystallization during polyphase Late Carboniferous to Triassic metamorphism in granulite of the Ivrea Zone(South Alps):An ion microprobe(SH RIM P)study[J].Conctrib.Mineral.Petrol.,1996,122:337-358.
- [27]Hanchar J M,Miller C F.Zirocn zonation patterns as revealed by cathodoluminescence and backscattered electron images:Implications for interpretation of complex crustal histories[J].Chem.Geol.,1993,110(1/3):1-13.
- [28]Claesson S,Vetrin V,Bayanova T,et al.U-Pb zircon age from a Devnian carbonatite dyke,Kola Peninsula,Russia:A record of geological evolution from the Archaean to the Paleozoic[J].Lithos,2000,51:95-108.
- [29]Corfu F,Hanchar J M,Hoskin P W O.Altas of zircon textures[J].Rev.Mineral.Geochem.,2003,53:469-500.
- [30]刘锐,周汉文,张利,等.华夏地块古元古代陆壳再造:锆石微量元素与U-Pb和Lu-Hf同位素证据[J].科学通报,2009,54(7):906-917.
- [31]Arodt N T,Goldstein S L.Use and abuse of crust formation ages[J].Geology,1987,15:893-895.
- [32]张宏飞,赵志丹,罗庭川,等.从岩石Sm-Nd同位素模式年龄论北秦岭地壳增生和地壳深部性质[J].岩石学报,1995,11(2):160-170.
- [33]吴福元,李献华,郑永飞,等.Lu-Hf同位素体系及其岩石学应用[J].岩石学报,2007,23(2):185-220.
- [34]Harrison T M,Blichert T J,Muller W.Heterogeneous Hadean hafnium:Evidence of continental crust at 4.4to 4.5Ga[J].Science.,2005,310:1947-1950.
- [35]万渝生,刘敦一,简平.独居石和锆石SHRIMP U-Pb定年对比[J].科学通报,2004,49(12):1 185-1 189.
- [36]赵庆英,刘正宏,吴新伟,等.内蒙古大青山地区哈拉合少岩体特征及成因[J].矿物岩石,2007,27(1):46-51.
- [37]章永梅,张华锋,周志广,等.内蒙古四子王旗大庙花岗岩体的成因与构造意义[J].矿物岩石,2008,28(2):28-38.
- [38]罗红玲,吴泰然,赵磊.乌拉特中旗二叠纪I型花岗岩类地球化学特征及构造意义[J].北京大学学报:自然科学版,2010,46(5):805-820.
- [39]赵磊.华北板块北缘中段晚古生代镁铁-超镁铁岩的岩石地球化学特征及其构造意义[D].北京:北京大学,2008.
- [40]于延秋,郭守钰,王立峰.内蒙古狼山浩日格山海西期花岗岩体特征与形成环境[J].世界地质,2011,30(3):345-351.
- [41]Griffin W L,Wang X,Jackon S E,et al.Zircon geochemistry and magama mixing,SE China:in-situ analysis of Hf isotopes,Tonglu and Pingtan igneous complexes[J].Lithos,2002,61:237-269.
- [42]Yang J H,Wu F Y,Shao J A,et al.Constrains on the timing of the Yanshan fold and thrust belt,North China[J].Earth Planet.Sci.Lett.,2006,246:336-352.
- [43]Jahn B M,Wu F Y,Hong D W.Important crustal growth in the Phanerozoic:Isotopic evidence of granitoids from the eastentral Asia[J].Earth Planet.Sci.,2000,109(1):5-20.
- [44]Jahn B M,Windley B,Dobretsov N,et al.Phanerozoic continental growth in Central Asia[J].Journal of Asian Earth Sciences,2004,23:599-603.
- [45]Kovalenko V I,Yarmolyuk V V,Kovach V P,et al.Isotope provinces,mechanisms of generation and sources of continental crust in the Central Asian mobile belt:Geological and isotopic evidence[J].Journal of Asian Earth Sciences,2004,23:605-627.
- [46]Hong D W,Wang S G,Han B F,et al.Post-orogenic alkaline granites from China and comparations with anorogenic alkaline granitites elsewhere[J].Journal of Southeast Asian Earth Sciences,1996,13(1):13-27.
- [47]王思源,杨海明.狼山造山带喷溢成矿研究[M].武汉:中国地质大学出版社,1993:1-160.
- [48]徐备,陈斌,张臣,等.中朝板块北缘乌华敖包地块Sm-Nd同位素等时线年龄及其意义[J].地质科学,1994,29(2):168-171.
- [49]陈岳龙,李大鹏,王忠,等.鄂尔多斯盆地周缘地壳形成与演化历史:来自锆石U-Pb年龄与Hf同位素组成的证据[J].地学前缘,2012,19(3):147-165.