刀艳;李峰;吴静;王蓉;吕俊男;

• 1:昆明理工大学国土资源工程学院

摘要(Abstract)：

对滇西宝兴厂矿区复式岩体锆石进行了阴极发光(Cathodoluminescence)和激光探针等离子质谱(LA-ICP-MS)分析。结果显示锆石发育良好的振荡环带,且Th/U比值>0.1;大部分锆石REE含量极高,且HREE富集、LREE亏损、强烈的正Ce异常和轻微的负Eu异常,是典型的花岗岩岩浆锆石。锆石Hf同位素结果显示,εHf(t)值变化于-0.4~2.7,二阶段模式年龄(TDM2)介于0.83~1.00Ga,继承锆石年龄为0.93~1.54Ga,指示显著的壳幔混合过程:印度大陆壳与欧亚大陆壳碰撞俯冲,深部地幔岩浆上涌,造成新生代-中生代基底物质部分熔融,形成以壳源为主的壳-幔混源岩浆。

关键词(KeyWords)： 微量元素;Hf同位素;复式岩体;宝兴厂

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(40872040);; 云南省科技厅自然科学基金项目(2011FZ035)

作者(Author): 刀艳;李峰;吴静;王蓉;吕俊男;

Email:

参考文献(References)：

• [1]Pupin J P.Zircon and granite petrology[J].Contributions to Mineralogy and Petrology,1980,73(3):207-220.
• [2]孟繁聪,孙岱生,李胜荣,等.胶东磁山花岗岩体的锆石形态群特征及其意义[J].岩石矿物学杂志,1999,18(1):87-94.
• [3]刘成龙.辽西中生代花岗岩中锆石的地球化学演化特征及其地质意义[J].岩石矿物学杂志,1987,4(6):338-344.
• [4]汪相,Pupin J P.花岗岩锆石中的微量元素的配分特征[J].地质科学,1992(2):131-140.
• [5]Linnen R L.The solubility of Nb-Ta-Hf-W in granitic melts with Li and Li+F:Constraints for mineralization in rare metal granites and pegmatites[J].Economical Geology,1998,93:1013-1025.
• [6]王汝成,赵广涛,王德滋,等.A型花岗岩中流体的分异聚集:副矿物证据[J].科学通报,2000,45(7):771-775.
• [7]谢桂青,胡瑞忠,蒋国豪,等.锆石的成因和U-Pb同位素定年的某些进展[J].地质地球化学,2001,29(4):64-70.
• [8]钟玉芳,马昌前,佘振兵.锆石地球化学特征及地质应用研究综述[J].地质科技情报,2006,25(1):27-34,40.
• [9]KnudSen T I,Griffin W I,Hartz E H,et al.In situ hafnium and lead isotope anlalyses of detrital zircon from the Devonian sedimentary basin of NE Greenland:A record of repeated crustal reworking[J].Contribution to Mineralogy and Petrology,2001,141:83-94.
• [10]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.
• [11]Barbey P,AlléP,Brouand M,et al.Rare-earth element patterns in zircons from the Manaslu granite and Tibetan Slab migmatites(Himalaya):Insights in the origin and evolution of crustally-derived magmas[J].Chemical Geology,1995,125:1-17.
• [12]Hinton R W,Upton B G J.The chemistry of zircon:Variations within and between large crystals from syenite and alkali basalt xenoliths[J].Geochimica et Cosmochimica Acta,1991,55(11):3287-3302.
• [13]Hoskin P W O,Ireland T R.Rare earth element chemistry of zircon and its use as a provenance indicator[J].Geology,2000,28(7):627-630.
• [14]Griffin W L,Wang X,Jackson S E,et al.Zricon chemistry and magma mixing,SC China:In-situ analysis of Hf isotopes,Tonglu and Pingtan igneous complexes[J].Lithos,2002,61:237-269.
• [15]Yang J H,Wu F Y,Chung S L,et al.A hybrid origin for the Qianshan A-type granite,northeast China:Geochemical and Sr Nd Hf isotope evidence[J].Lithos,2006,89:89-106.
• [16]Patchett P J,Tatsumoto M.Lu-Hf total-rock isochron for the eucrite meteorites[J].Nature,1980,288:571-574.
• [17]高翔,魏俊浩,付乐兵,等.西准噶尔托里地区卡拉岗组火山岩地球化学特征及其构造意义[J].地质科技情报,2014,33(5):16-24.
• [18]Scherer E E,Cameron K L,Blichert-Toft J.Lu-Hf garnet geochronology:Closure temperature relative to the Sm-Nd system and the effects of trace mineral inclusions[J].Geochimica et Cosmochimica Acta,2000,64(19):3413-3432.
• [19]王登红,杨建民,薛春纪.西南三江-大渡河地区喜马拉雅期金成矿作用的同位素年代学依据[M]∥陈毓川,王登红.喜马拉雅内生成矿作用研究.北京:地震出版社,2001:84-87.
• [20]罗君烈,杨友华,赵准.滇西特提斯的演化及主要金属矿床成矿作用[M].北京:地质出版社,1994.
• [21]曾普胜,莫宣学,喻学惠.滇西富碱斑岩带的Nd、Sr、Pb同位素特征及其挤压走滑背景[J].岩石矿物学杂志,2002,21(3):231-241.
• [22]郭晓东,侯增谦,陈祥,等.云南马厂箐富碱斑岩埃达克岩性质的厘定及其成矿意义[J].岩石矿物学杂志,2009,28(4):375-386.
• [23]谢应雯,张玉泉,胡国相.哀牢山-金沙江富碱侵入带地球化学与成矿专属性初步研究[J].昆明工学院学报,1984(4):1-17.
• [24]王治华,郭晓东,葛良胜,等.云南祥云马厂箐富碱斑岩体的地球化学特征[J].地质与勘探,2009,45(4):343-351.
• [25]贾丽琼,莫宣学,董国臣,等.滇西马厂箐煌斑岩成因:地球化学、年代学及Sr-Nd-Pb-Hf同位素约束[J].岩石学报,2013,29(4):1247-1260.
• [26]莫宣学,赵志丹,喻学惠,等.青藏高原新生代碰撞-后碰撞火成岩[M].北京:地质出版社,2009.
• [27]侯增谦,王二七,莫宣学,等.青藏高原碰撞造山与成矿作用[M].北京:地质出版社,2008.
• [28]喻学惠,肖晓牛,杨贵来,等.滇西“三江”南段几个花岗岩的锆石SHIRMP U-Pb定年及其地质意义[J].岩石学报,2008,24(2):377-383.
• [29]Li X H,Liang X R,Sun M,et al.Geochronology and geochemistry of single-grain zircons:Simultaneous in-situ-analysis of UPb age and trace elements by LAM-ICP-MS[J].Eur.Jounal of Mineralogy,2000,12:1015-1024.
• [30]De Bievre P,Taylor P D P.Table of the isotopic compositions of the elements[J].Int.J.Mass Spectrom,1993,123(2):149-166.
• [31]Chu M F,Chung S L,Song B,et al.Zircon U-Pb and Hf isotope constraints on the Mesozoic tectonics and crustal evolution of southern Tibet[J].Geology,2006,34(9):745-748.
• [32]Elhlou S,Belousova E,Griffin W L,et al.Trace element and isotopic composition of GJ-red zircon standard by laser ablation[J].Geochimica et Cosmochimica Acta,2006,70(18):A158.
• [33]Scherer E,Muenker K C,Mezger K.Calibration of the lutetium-hafnium clock[J].Science,2001,293:683-687.
• [34]Blichert-Toft J,Albarede F.The Lu-Hf isotope geochemistry of chondrites and the evolution of the mantle-crust system[J].Earth and Planetary Science Letters,1997,148:243-258.
• [35]Sun S S,McDonough W F.Chemical and isotopic systematics of oceanic basalts:Implications for mantle composition and processes[J].Geological Society,London,1989,42:313-345.
• [36]Belousova E A,Griffin W L,O′Reilly S Y.Zircon crystal morphology,trace dement signatures and Hf isotope composition as a tool for petrogenetic modelling:Examples from eastern Australian granitoids[J].Journal of Petrology,2006,47(2):329-353.
• [37]刀艳,李峰,王蓉,等.云南九顶山正长斑岩年代学、岩石地球化学及Sr-Nd-Hf同位素特征[J].大地构造与成矿学,2015,39(3):497-509.
• [38]刀艳,李峰,王蓉,等.滇西九顶山斑状花岗岩LA-ICP-MS锆石U-Pb定年及地球化学特征[J].地质与勘探,2014,50(3):533-542.
• [39]刀艳,李峰,王蓉,等.滇西九顶山铜钼矿花岗斑岩成因:LAICP-MS锆石U-Pb年龄、岩石地球化学和Sr-Nd-Hf同位素制约[J].中国地质,2015,42(1):134-148.
• [40]Chavagnac V,German C R,Milton A,et al.Sources of REE in sediment cores from the Rainbow vent site(36°14′N,MAR)[J].Chemical Geology,2005,216(3/4):329-352.
• [41]毛晓长,尹福光,廖世勇.金沙江-哀牢山构造带中段桃花村岩体的LA-ICP-MS锆石U-Pb定年及地质意义[J].矿物岩石,2012,32(3):70-76.
• [42]谢士稳,高山,柳小明,等.扬子克拉通南华纪碎屑锆石U-Pb年龄、Hf同位素对华南新元古代岩浆事件的指示[J].地球科学:中国地质大学学报,2009,34(1):117-125.
• [43]梁清玲,江思宏,王少怀,等.福建紫金山地区中生代岩浆岩成因:锆石Hf同位素证据[J].岩石矿物学杂志,2013,32(3):318-328.
• [44]Grimes C B,John B E,Kelemen P B,et al.Trace element chemistry of zircon from oceanic crust:A method for distinguishing detrital zircon provenance[J].Geology,2007,35(7):643-646.
• [45]张玉泉,谢应雯,涂光炽.哀牢山-金沙江富碱侵入岩年代学Nd,Sr同位素特征[J].中国科学:D辑,1997,27(4):289-293.