用户名: 密码: 验证码:
伊朗大理矿区中新世成矿及无矿斑岩地球化学对比及其对成矿的启示
详细信息    查看全文 | 推荐本文 |
  • 英文篇名:Geochemical Constraints on Fertile and Infertile Miocene Magmatic Suite in Dalli Area, Iran and Its Insights for Metallogeny
  • 作者:赵苗 ; 杨竹森 ; 张洪瑞
  • 英文作者:Zhao Miao;Yang Zhusen;Zhang Hongrui;MNR Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences;Institute of Geology,Chinese Academy of Geological Sciences;
  • 关键词:伊朗 ; 乌尔米耶-达克塔尔弧岩浆带 ; 大理 ; 斑岩铜矿 ; 岩浆演化 ; 岩石学
  • 英文关键词:Iran;;Urumieh-Dokhtar magmatic arc;;Dalli;;porphyry copper deposits;;magma evolution;;petrology
  • 中文刊名:地球科学
  • 英文刊名:Earth Science
  • 机构:中国地质科学院矿产资源研究所自然资源部成矿作用与资源评价重点实验室;中国地质科学院地质研究所;
  • 出版日期:2019-06-10 09:46
  • 出版单位:地球科学
  • 年:2019
  • 期:06
  • 基金:国家重点研发计划(No.2016YFC0600306);; 国家自然科学基金重点项目(No.91855214);; 自然科学基金项目(No.41772088);; 中国地质调查局项目(No.DD20190001)
  • 语种:中文;
  • 页:421-430
  • 页数:10
  • CN:42-1874/P
  • ISSN:1000-2383
  • 分类号:P618.41;P597.3;P588.13
摘要
伊朗乌尔米耶-达克塔尔弧岩浆带(Urumieh-Dokhtar magmatic arc,UDMA)是特提斯域最重要的斑岩铜矿省,发育大量中新世大型超-大型斑岩铜矿床;同时,该带也发育大量同时代无矿岩体,但控制岩体成矿潜力的关键因素尚不清楚.为此,选择该带中段、成矿及无矿岩体同时发育的大理矿区,针对成矿及无矿岩体开展了系统的锆石岩相学、年代学、微量元素地球化学及Hf同位素地球化学对比.结果显示,无矿闪长岩(锆石U-Pb年龄:17.4±0.3 Ma)比成矿石英闪长斑岩(锆石U-Pb年龄:15.6±0.1 Ma)形成略早,但近乎同期;闪长岩εHf(t)值变化介于+2~+4,石英闪长斑岩εHf(t)值变化介于+2~+5,两者具有类似的Hf同位素组成;闪长岩中锆石常含老的继承核(172~920 Ma),石英闪长斑岩则不发育继承锆石;闪长岩及石英闪长斑岩中的中新世锆石具有类似的稀土配分模式,且Eu负异常不明显,而闪长岩中的锆石继承核则显示出明显的Eu负异常,配分模式与中新世锆石不同.基于上述结果,我们提出大理矿区的两套中新世岩体具有相同的岩浆源区,但经历了不同的地壳演化过程,成矿的石英闪长斑岩浆形成后,与古老地壳没有明显交互,而无矿的闪长岩浆,在上升过程中与地壳物质、特别是古老还原性物质发生了交互,交互过程中岩浆氧逸度降低,是该套岩浆不成矿的主要原因.进而我们提出UDMA带中段斑岩成矿与否不仅与前人所认为的受岩浆源区控制,也与岩浆演化过程密不可分.
        The Urumieh-Dokhtar magmatic arc(UDMA), hosting three giant and six large Miocene porphyry copper deposits, is the most important post collisional porphyry belt in the Tethyan domain. In the UDMA belt, there are also abundant coeval barren porphyry intrusions, but the factors controlling fertility of Miocene porphyry intrusions in the belt remains enigmatic. The Dalli deposit, located in the central segment of UDMA, contains both fertile and barren Miocene intrusions. In this study, we report zircon petrography, geochronology, trace element geochemistry and Hf isotopic compositions for the barren diorite and mineralization-related quartz diorite porphyry at Dalli. The results show that the diorite has inherited zircon cores overgrown by new zircons, whereas quartz diorite only has one type of zircon. The diorite yields a zircon U-Pb age of 17.4±0.3 Ma, which is slightly older than the quartz diorite porphyry(zircon U-Pb: 15.6±0.1 Ma), and the inherited zircon cores yielded as zircon U-Pb of172-920 Ma. Both the diorite and quartz diorite porphyry show slightly positive εHf(t) values, which are respectively +2-+4 and +2-+5.Miocene zircons from both diorite and quartz diorite porphyry are characterized by obviously positive Ce anomalies and slightly depleted Eu anomalies. However, the inherited zircon cores exhibit more depleted Eu anomalies, suggesting low oxygen fugacity. These results suggest that the barren diorite possibly interacted with ancient crust, particularly with reduced material, which subsequently decreased magma oxygen fugacity whereas the fertile quartz diorite porphyry emplaced without such material exchange. On the basis of above observations, we propose magma process may be the first order of key factors controlling the fertility of intrusions in the central segment of the UDMA.
引文
Afshooni,S.Z.,Mirnejad,H.,Esmaeily,D.,et al.,2013.Mineral Chemistry of Hydrothermal Biotite from the Kahang Porphyry Copper Deposit(NE Isfahan),Central Province of Iran.Ore Geology Reviews,54:214-232.https://doi.org/10.1016/j.oregeorev.2013.04.004
    Agard,P.,Omrani,J.,Jolivet,L.,et al.,2011.Zagros Orogeny:A Subduction-Dominated Process.Geological Magazine,148(5-6):692-725.
    Aghazadeh,M.,Hou,Z.Q.,Badrzadeh,Z.,et al.,2015.Temporal-Spatial Distribution and Tectonic Setting of Porphyry Copper Deposits in Iran:Constraints from Zircon U-Pb and Molybdenite Re-Os Geochronology.Ore Geology Reviews,70:385-406.https://doi.org/10.1016/j.oregeorev.2015.03.003
    Alavi,M.,1980.Tectonostratigraphic Evolution of the Zagrosides of Iran.Geology,8(3):144-149.
    Alavi,M.,2004.Regional Stratigraphy of the Zagros FoldThrust Belt of Iran and Its Proforeland Evolution.American Journal of Science,304(1):1-20.https://doi.org/10.2475/ajs.304.1.1
    Ali,S.A.,Buckman,S.,Aswad,K.J.,et al.,2013.The Tectonic Evolution of a Neo-Tethyan(Eocene-Oligocene)Island-Arc(Walash and Naopurdan Groups)in the Kurdistan Region of the Northeast Iraqi Zagros Suture Zone.Island Arc,22(1):104-125.https://doi.org/10.1111/iar.12007
    Asadi,S.,2018.Triggers for the Generation of Post-Collisional Porphyry Cu Systems in the Kerman Magmatic Copper Belt,Iran:New Constraints from Elemental and Isotopic(Sr-Nd-Hf-O)Data.Gondwana Research,64:97-121.https://doi.org/10.1016/j.gr.2018.06.008
    Ayati,F.,Yavuz,F.,Asadi,H.H.,et al.,2013.Petrology and Geochemistry of Calc-Alkaline Volcanic and Subvolcanic Rocks,Dalli Porphyry Copper-Gold Deposit,Markazi Province,Iran.International Geology Review,55(2):158-184.
    Belousova,E.,Griffin,W.,O'Reilly,S.Y.,et al.,2002.Igneous Zircon:Trace Element Composition as an Indicator of Source Rock Type.Contributions to Mineralogy and Petrology,143(5):602-622.https://doi.org/10.1007/s00410-002-0364-7
    Boomeri,M.,Nakashima,K.,Lentz,D.R.,2010.The Sarcheshmeh Porphyry Copper Deposit,Kerman,Iran:AMineralogical Analysis of the Igneous Rocks and Alteration Zones Including Halogen Element Systematics Related to Cu Mineralization Processes.Ore Geology Reviews,38(4):367-381.https://doi.org/10.1016/j.oregeorev.2010.09.001
    Burnham,A.D.,Berry,A.J.,2012.An Experimental Study of Trace Element Partitioning between Zircon and Melt as a Function of Oxygen Fugacity.Geochimica et Cosmochimica Acta,95:196-212.https://doi.org/10.1016/j.gca.2012.07.034
    Chiu,H.Y.,Chung,S.L.,Zarrinkoub,M.H.,et al.,2017.Zircon Hf Isotopic Constraints on Magmatic and Tectonic Evolution in Iran:Implications for Crustal Growth in the Tethyan Orogenic Belt.Journal of Asian Earth Sciences,145:652-669.
    Chiu,H.Y.,Chung,S.L.,Zarrinkoub,M.H.,et al.,2013.Zircon U-Pb Age Constraints from Iran on the Magmatic Evolution Related to Neotethyan Subduction and Zagros Orogeny.Lithos,162-163:70-87.
    Ghasemi,A.,Talbot,C.J.,2006.A New Tectonic Scenario for the Sanandaj-Sirjan Zone(Iran).Journal of Asian Earth Sciences,26(6):683-693.https://doi.org/10.1016/j.jseaes.2005.01.003
    Haschke,M.,Ahmadian,J.,Murata,M.,et al.,2010.Copper Mineralization Prevented by Arc-Root Delamination during Alpine-Himalayan Collision in Central Iran.Economic Geology,105(4):855-865.https://doi.org/10.2113/gsecongeo.105.4.855
    Hezarkhani,A.,Williams-Jones,A.E.,1998.Controls of Alteration and Mineralization in the Sungun Porphyry Copper Deposit,Iran;Evidence from Fluid Inclusions and Stable Isotopes.Economic Geology,93(5):651-670.https://doi.org/10.2113/gsecongeo.93.5.651
    Hoskin,P.W.O.,Black,L.P.,2002.Metamorphic Zircon Formation by Solid-State Recrystallization of Protolith Igneous Zircon.Journal of Metamorphic Geology,18(4):423-439.doi:10.1046/j.1525-1314.2000.00266.x
    Kargaranbafghi,F.,Neubauer,F.,Genser,J.,et al.,2012.Mesozoic to Eocene Ductile Deformation of Western Central Iran:From Cimmerian Collisional Orogeny to Eocene Exhumation.Tectonophysics,564-565:83-100.https://doi.org/10.1016/j.tecto.2012.06.017
    Li,W.K.,Yang,Z.M.,Cao,K.,et al.,2019.Redox-Controlled Generation of the Giant Porphyry Cu-Au Deposit at Pulang,Southwest China.Contributions to Mineralogy and Petrology,174(2):12.https://doi.org/10.1007/s00410-019-1546-x
    Meyer,B.,Mouthereau,F.,Lacombe,O.,et al.,2006.Evidence of Quaternary Activity along the Deshir Fault:Implication for the Tertiary Tectonics of Central Iran.Geophysical Journal International,164(1):192-201.https://doi.org/10.1111/j.1365-246x.2005.02784.x
    Mirnejad,H.,Hassanzadeh,J.,Cousens,B.L.,et al.,2010.Geochemical Evidence for Deep Mantle Melting and Lithospheric Delamination as the Origin of the Inland Damavand Volcanic Rocks of Northern Iran.Journal of Volcanology and Geothermal Research,198(3-4):288-296.
    Morley,C.K.,Kongwung,B.,Julapour,A.A.,et al.,2009.Structural Development of a Major Late Cenozoic Basin and Transpressional Belt in Central Iran:The Central Basin in the Qom-Saveh Area.Geosphere,5(4):325-362.https://doi.org/10.1130/ges00223.1
    Mouthereau,F.,Lacombe,O.,Vergés,J.,2012.Building the Zagros Collisional Orogen:Timing,Strain Distribution and the Dynamics of Arabia/Eurasia Plate Convergence.Tectonophysics,532-535:27-60.https://doi.org/10.1016/j.tecto.2012.01.022
    Rowins,S.M.,2000.Reduced Porphyry Copper-Gold Deposits:A New Variation on an Old Theme.Geology,28(6):491-494.
    Shafiei,B.,Haschke,M.,Shahabpour,J.,2009.Recycling of Orogenic Arc Crust Triggers Porphyry Cu Mineralization in Kerman Cenozoic Arc Rocks,Southeastern Iran.Mineralium Deposita,44(3):265-283.https://doi.org/10.1007/s00126-008-0216-0
    Sillitoe,R.H.,2010.Porphyry Copper Systems.Economic Geology,105(1):3-41.https://doi.org/10.2113/gsecongeo.105.1.3
    Sun,S.S.,McDonough,W.F.S.,1989.Chemical and Isotopic Systematics of Oceanic Basalts:Implications for Mantle Composition and Processes.Geological Society,London,Special Publications,42(1):313-345.https://doi.org/10.1144/gsl.sp.1989.042.01.19
    Waterman,G.C.,Hamilton,R.L.,1975.The Sar Cheshmeh Porphyry Copper Deposit.Economic Geology,70(3):568-576.https://doi.org/10.2113/gsecongeo.70.3.568
    Watson,E.B.,Wark,D.A.,Thomas,J.B.,2006.Crystallization Thermometers for Zircon and Rutile.Contributions to Mineralogy and Petrology,151(4):413-433.https://doi.org/10.1007/s00410-006-0068-5
    Wu,F.Y.,Yang,Y.H.,Xie,L.W.,et al.,2006.Hf Isotopic Compositions of the Standard Zircons and Baddeleyites Used in U-Pb Geochronology.Chemical Geology,234(1-2):105-126.https://doi.org/10.1016/j.chemgeo.2006.05.003
    Yang,D.B.,Xu,W.L.,Pei,F.P.,et al.,2009.Petrogenesis of the Paleoproterozoic K-Feldspar Granites in Bengbu Uplift:Constraints from Petro-Geochemistry,Zircon U-Pb Dating and Hf Isotope.Earth Science,34(1):148-164(in Chinese with English abstract).
    Yang,Z.M.,Hou,Z.Q.,Song,Y.C.,et al.,2008.Qulong Superlarge Porphyry Cu Deposit in Tibet:Geology,Alteration and Mineralization.Mineral Deposits,27(3):279-318(in Chinese with English abstract).
    Yu,C.,Yang,Z.M.,Zhou,L.M.,et al.,2019.Impact of Laser Focus on Accuracy of U-Pb Dating of Zircons by LA-ICPMS.Mineral Deposits,38(1):21-28(in Chinese with English abstract).
    Zarasvandi,A.,Liaghat,S.,Zentilli,M.,et al.,2007.40Ar/39Ar Geochronology of Alteration and Petrogenesis of Porphyry Copper-Related Granitoids in the Darreh-Zerreshk and Ali-Abad Area,Central Iran.Exploration and Mining Geology,16(1-2):11-24.https://doi.org/10.2113/gsemg.16.1-2.11-a
    Zarasvandi,A.,Liaghat,S.,Zentilli,M.,2005.Geology of the Darreh-Zerreshk and Ali-Abad Porphyry Copper Deposits,Central Iran.International Geology Review,47(6):620-646.https://doi.org/10.2747/0020-6814.47.6.620
    Zarasvandi,A.,Rezaei,M.,Raith,J.,et al.,2015b.Geochemistry and Fluid Characteristics of the Dalli Porphyry Cu-Au Deposit,CentralIran.JournalofAsianEarthSciences,111:175-191.https://doi.org/10.1016/j.jseaes.2015.07.029
    Zarasvandi,A.,Rezaei,M.,Sadeghi,M.,et al.,2015a.Rare Earth Element Signatures of Economic and Sub-Economic Porphyry Copper Systems in Urumieh-Dokhtar Magmatic Arc(UDMA),Iran.Ore Geology Reviews,70:407-423.
    Zhang,H.R.,Hou,Z.Q.,2015.Tectonic Evolution and Mineralization of Zagros Orogenic Belt.Acta Geologica Sinica,89(9):1560-1572(in Chinese with English abstract).
    Zhang,Z.,Song,J.L.,Tang,J.X.,et al.,2017.Petrogenesis,Diagenesis and Mineralization Ages of Galale Cu-Au Deposit,Tibet:Zircon U-Pb Age,Hf Isotopic Composition and Molybdenite Re-Os Dating.Earth Science,42(6):862-880(in Chinese with English abstract).
    Zhao,Z.D.,Liu,D.,Wang,Q.,et al.,2018.Zircon Trace Elements and Their Use in Probing the Deep Processes.Earth Science Frontiers,25(6):124-135(in Chinese with English abstract).
    杨德彬,许文良,裴福萍,等,2009.蚌埠隆起区古元古代钾长花岗岩的成因:岩石地球化学、锆石U-Pb年代学与Hf同位素的制约.地球科学,34(1):148-164.
    杨志明,侯增谦,宋玉财,等,2008.西藏驱龙超大型斑岩铜矿床:地质、蚀变与成矿.矿床地质,27(3):279-318.
    于超,杨志明,周利敏,等,2019.激光焦平面变化对LA-ICPMS锆石U-Pb定年准确度的影响.矿床地质,38(1):21-28.
    张洪瑞,侯增谦,2015.伊朗扎格罗斯造山带构造演化与成矿.地质学报,89(9):1560-1572.
    张志,宋俊龙,唐菊兴,等,2017.西藏嘎拉勒铜金矿床的成岩成矿时代与岩石成因:锆石U-Pb年龄、Hf同位素组成及辉钼矿Re-Os定年.地球科学,42(6):862-880.
    赵志丹,刘栋,王青,等,2018.锆石微量元素及其揭示的深部过程.地学前缘,25(6):124-135.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700