西天山备战铁矿火山岩地球化学特征、锆石U-Pb年代学及Hf同位素组成研究
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摘要
备战铁矿是西天山阿吾拉勒成矿带新近发现的大型铁矿之一,矿区广泛发育下石炭统火山岩。本文对矿区火山岩进行了主量元素、微量元素、稀土元素地球化学特征分析、LA-ICP-MS锆石U-Pb测年以及锆石Lu-Hf同位素组成研究,以探讨矿区大哈拉军山组火山岩产出的构造环境、备战铁矿的成岩成矿时代和火山岩的来源。矿区火山岩主要由玄武岩、玄武安山岩、安山岩、流纹岩组成,以中基性岩为主,大多为高钾钙碱性系列;微量元素和稀土元素表明矿区火山岩产出构造环境为活动陆缘火山岛弧;锆石U-Pb测试结果显示矿区南部斜长花岗斑岩的形成时代为晚石炭世早期(301±0.93Ma),成矿时代为早石炭世晚期。结合地质背景认为该铁矿至少有两期成矿期,在成因上为火山沉积后期叠加矽卡岩化的磁铁矿矿床。锆石Lu-Hf同位素组成特征表明备战铁矿的岩石来源于元古代、太古代地壳物质的部分熔融,并且源区物质在地壳中存在较长的时间。
Beizhan iron ore is one of the newly discovered medium-sized iron ores in Awulale mineralization of west Tianshan.Lower Carboniferous volcanic rocks are widely developed in the mine.This paper analyses the major elements,trace elements,REE geochemical characteristics and LA-ICP-MS zircon U-Pb dating and zircon Hf-Lu isotopes of the volcanic rocks,and discusses the tectonic environment of Dahalajunshan formation in the mine,diagenetic mineralization age and the source of the volcanic rocks.they belong to rich calc-alkalic series,and consist of basalt,basaltic andesite,andesite and liparite.They are dominated by mafic rocks.Trace elements and REE show that the tectonic environment of the volcanic rocks in the mine belongs to activities terrestrial volcanic island arc.LA-ICP-MS zircon U-Pb suggests that the formation time of granite mine in southern yield is an isotopic age of(301±0.93)Ma,which represents late Early Carboniferous,and its metallogenic epoch is early Late Carboniferous.According to its geological background,we conclude that Beizhan iron ore has two metallogenic periods at least,In the aspect of genesis,It is a magnetite deposits which had overlaid the volcanic sedimentary superposition and skarn.Zircon Hf-Lu isotopes shows that Beizhan iron ore rocks are from the Proterozoic,partial melting of Archean crustal material,and the source material there has been in the earth's crust for a long time.
Beizhan iron ore is one of the newly discovered medium-sized iron ores in Awulale mineralization of west Tianshan.Lower Carboniferous volcanic rocks are widely developed in the mine.This paper analyses the major elements,trace elements,REE geochemical characteristics and LA-ICP-MS zircon U-Pb dating and zircon Hf-Lu isotopes of the volcanic rocks,and discusses the tectonic environment of Dahalajunshan formation in the mine,diagenetic mineralization age and the source of the volcanic rocks.they belong to rich calc-alkalic series,and consist of basalt,basaltic andesite,andesite and liparite.They are dominated by mafic rocks.Trace elements and REE show that the tectonic environment of the volcanic rocks in the mine belongs to activities terrestrial volcanic island arc.LA-ICP-MS zircon U-Pb suggests that the formation time of granite mine in southern yield is an isotopic age of(301±0.93)Ma,which represents late Early Carboniferous,and its metallogenic epoch is early Late Carboniferous.According to its geological background,we conclude that Beizhan iron ore has two metallogenic periods at least,In the aspect of genesis,It is a magnetite deposits which had overlaid the volcanic sedimentary superposition and skarn.Zircon Hf-Lu isotopes shows that Beizhan iron ore rocks are from the Proterozoic,partial melting of Archean crustal material,and the source material there has been in the earth's crust for a long time.
引文
车自成,刘良,刘洪福,罗金海.1996.论伊犁古裂谷.岩石学报,12(3):478~489.
高俊,何国琦,李茂松.1997.西天山造山带的古生代造山过程.地质科学-中国地质大学学报,22(1):27~32.
郭新成,张建收,余元军,马中华,张建奎,宋海涛.2009.新疆和静县备战铁矿地质特征及找矿标志.新疆地质,27(4)341~344.
郭虎,王家松.2009.用于同位素分析的锆石样品的系统制备方法.洛阳师范学院学报,11:15~22.
姜常义,吴文奎,张学仁,崔尚森.1995.从岛弧向裂谷的变迁-来自阿吾拉勒地区火山岩的证据.岩石矿物学杂志,14(4):289~300.
蒋宗胜,张作衡,侯可军,洪为,王志华,李凤鸣,田敬全.2012.西天山查岗诺尔和智博铁矿区火山岩地球化学特征、锆石U-Pb年龄及地质意义.岩石学报,28(7):2074~2086.
隗合明,吴文魁,薛春纪.1999.新疆西天山金属矿床成矿系列及形成演化规律.地质学报,73(3):219~230.
龙灵利,高俊,钱青,熊贤明,王京彬,王玉往,高立明.2008.西天山伊犁地区石炭纪火山岩地球化学特征及构造意义.岩石学报,24(4):699~710.
李永军,高永利,佟丽莉,郭文杰,佟黎明.2009.西天山阿吾拉勒一带石炭系阿克沙克组风暴岩及其意义.地学前缘,16(3):341~348.
李注苍,李永军,李景红,栾新东,郭文杰.2006.西天山阿吾拉勒一带大哈拉军山组火山岩地球化学特征及构造环境分析.新疆地质,24(2):120~124.
李向东,李茂松.2006.中国西天山地质构造与西邻地区的对比研究.地质论评,42(2):107~115.
罗勇,单强,杨武斌,于学元.2009.西天山艾肯达坂二叠纪钾质火山岩的地球化学特征及成矿作用.矿物学报,S1:72.
刘俊玉,吴立新,李大鹏,王树新,董学.2014.新疆西天山备战铁矿成矿作用探讨.山东国土资源,30(5):27~36.
邱家骧.1991.应用岩浆岩石学.武汉:中国地质大学出版社,1~5.
王志良,毛景文,张作衡,左国朝,王龙生.2004.西天山古生代铜金多金属矿床类型、特征及其成矿地球动力学演化.地质学报,78(6):837~847.
吴福元,李献华,郑永飞,高山.2007.Lu-Hf同位素体系及其岩石学应用.岩石学报,23(2):185~220.
夏林圻,张国伟,夏祖春,徐学义,董永鹏,李向明.2002.天山古生代洋盆开启、闭合时限的岩石学约束———来自震旦纪、石炭纪火山岩的证据.地质通报,21(2):55~62.
熊小林,赵振华,白正华,梅厚钧,许继峰,王强.2001.西天山阿吾拉勒埃达克指岩石成因:Nd和Sr同位素的限制.岩石学报,17(4):514~522.
朱永峰,张立飞,郭璇,周晶.2005a.移动的古生代岛弧:新疆西南天山大哈拉军山组火山岩.矿物岩石地球化学通报,24(增刊):194.
朱永峰,周晶,郭璇.2005b.西天山石炭纪火山岩岩石学及Sr-Nd同位素地球化学研究.岩石学报,22(5):1341~1350.
朱永峰,周晶,宋彪,张立飞,郭璇.2006.新疆“大哈拉军山组”火山岩的形成时代问题及其解体方案.中国地质,33(3):488~496.
朱永峰,安芳,薛云兴,陈博,张立飞.2010.西南天山特克斯科桑溶洞火山岩的锆石U-Pb年代学研究.岩石学报,26(8):2255~2263.
赵振华,熊小林,王强,白正华,梅厚钧.2004.新疆西天山莫斯早特石英钠长斑岩铜矿床———一个与埃达克质岩石有关的铜矿实例.岩石学报,20(2):249~258.
郑勇,黄文海,周义,赵振刚,郭新成,陈郑辉.2014.新疆备战铁矿侵入岩地球化学特征、成岩时代及地质意义.地球科学与环境学报,36(2):38~50.
Belousova E A,Griffin W L,O Reilly S Y and Fisher N I.2002.Igneous zircon:Trace element composition as an indicator ofsource rock type.Contributions to Mineralogy and Petrology,143:602~622.
Duggen S,Hoernle K,Van den Bogaard P and Garbe-Schǒnberg D.2005.Post-collisional transition from subduction-to intraplatetype magmatism in the westernmost Mediterranean:Evidencefor continental-edge delamination of subcontinental lithosphere.Journal of petrology,46(6):1155~1201.
Gao J,Long L,Klemd R,Qian Q,Liu D,Xiong X,Su W,Liu W,Wang Y,Yang F.2009.Tectonic evolution of the SouthTianshan orogen and adjacent regions,NW China:Geochemicaland age constraints of granitoid rocks.International Journal ofEarth Sciences,98(6):1221~1238.
Hawkesworth C,Turner S,Gallagher K,Hunter A,Bradshaw Tand Rogers N.1995.Calc-alkaline magmatism,lithosphericthinning and extension in the basin and range.Journal ofGeophysical Research.100(B6):10271~10286.
Liágeois J P,Navez J,Hertogen J and Black R.1998.Contrastingorigin of post-collisional high-K calc-alkaline and shoshoniticversus alkaline and peralkaline granitoids:The use of slidingnormalization.Lithos,45(1~4):1~28.
Ludwig K R.2003.User’s manual for Isoplot 3.00:AGeochronologucal toolkit for Microsoft Excel.BerkeleyGeochronology Center,Special Publication,4:70.
Morrison G W.1980.Characteristics and tectonic setting of theshoshonite rock association.Lithos,13(1):97~108.
Pearce J A,Norry M J.1979.Petrogenetic Implication of Ti,Zr,Yand Nb variation in volcanic rocks.Contrib.Mineral.Petrol,69:33~47.
Pearce J A.1982.Trace element characteristice of lacas fromdestructive plate boundaries.in:Anedsites.(R.S Thorp,ed.):525~847.
Sun S S,McDonough W F.1989.Chemical and isotope systematicsof oceanic basalts:implication for mantle compositionprocesses.Geological Society of London,Special Publication,42:313~345.
Taylor S R,McLennan S M.1985.The continental crust:itscomposition and evolution.Oxford:Blackwell,1~312.
Windley B F,Allen M B,Zhang Chi.1990.Paleozoic accretion andCenozoic redeformation of the Chinese Tian Shan range.CentralAsia.Geology,18:128~131.
Xiao W J,Windley B,Huang B C,Han C M,Yuan C,Chen H L,Sun M,Sun S,Li J L.2009.End-Permian to Mid-Triassictermination of the accretionary processes of the southernAltaids:Implication for the geodynamic evolution,Phanerozoiccontinental growth and matallogeny of Central Asia.International Journal of Earth Sciences,98(6):1189~1217.
高俊,何国琦,李茂松.1997.西天山造山带的古生代造山过程.地质科学-中国地质大学学报,22(1):27~32.
郭新成,张建收,余元军,马中华,张建奎,宋海涛.2009.新疆和静县备战铁矿地质特征及找矿标志.新疆地质,27(4)341~344.
郭虎,王家松.2009.用于同位素分析的锆石样品的系统制备方法.洛阳师范学院学报,11:15~22.
姜常义,吴文奎,张学仁,崔尚森.1995.从岛弧向裂谷的变迁-来自阿吾拉勒地区火山岩的证据.岩石矿物学杂志,14(4):289~300.
蒋宗胜,张作衡,侯可军,洪为,王志华,李凤鸣,田敬全.2012.西天山查岗诺尔和智博铁矿区火山岩地球化学特征、锆石U-Pb年龄及地质意义.岩石学报,28(7):2074~2086.
隗合明,吴文魁,薛春纪.1999.新疆西天山金属矿床成矿系列及形成演化规律.地质学报,73(3):219~230.
龙灵利,高俊,钱青,熊贤明,王京彬,王玉往,高立明.2008.西天山伊犁地区石炭纪火山岩地球化学特征及构造意义.岩石学报,24(4):699~710.
李永军,高永利,佟丽莉,郭文杰,佟黎明.2009.西天山阿吾拉勒一带石炭系阿克沙克组风暴岩及其意义.地学前缘,16(3):341~348.
李注苍,李永军,李景红,栾新东,郭文杰.2006.西天山阿吾拉勒一带大哈拉军山组火山岩地球化学特征及构造环境分析.新疆地质,24(2):120~124.
李向东,李茂松.2006.中国西天山地质构造与西邻地区的对比研究.地质论评,42(2):107~115.
罗勇,单强,杨武斌,于学元.2009.西天山艾肯达坂二叠纪钾质火山岩的地球化学特征及成矿作用.矿物学报,S1:72.
刘俊玉,吴立新,李大鹏,王树新,董学.2014.新疆西天山备战铁矿成矿作用探讨.山东国土资源,30(5):27~36.
邱家骧.1991.应用岩浆岩石学.武汉:中国地质大学出版社,1~5.
王志良,毛景文,张作衡,左国朝,王龙生.2004.西天山古生代铜金多金属矿床类型、特征及其成矿地球动力学演化.地质学报,78(6):837~847.
吴福元,李献华,郑永飞,高山.2007.Lu-Hf同位素体系及其岩石学应用.岩石学报,23(2):185~220.
夏林圻,张国伟,夏祖春,徐学义,董永鹏,李向明.2002.天山古生代洋盆开启、闭合时限的岩石学约束———来自震旦纪、石炭纪火山岩的证据.地质通报,21(2):55~62.
熊小林,赵振华,白正华,梅厚钧,许继峰,王强.2001.西天山阿吾拉勒埃达克指岩石成因:Nd和Sr同位素的限制.岩石学报,17(4):514~522.
朱永峰,张立飞,郭璇,周晶.2005a.移动的古生代岛弧:新疆西南天山大哈拉军山组火山岩.矿物岩石地球化学通报,24(增刊):194.
朱永峰,周晶,郭璇.2005b.西天山石炭纪火山岩岩石学及Sr-Nd同位素地球化学研究.岩石学报,22(5):1341~1350.
朱永峰,周晶,宋彪,张立飞,郭璇.2006.新疆“大哈拉军山组”火山岩的形成时代问题及其解体方案.中国地质,33(3):488~496.
朱永峰,安芳,薛云兴,陈博,张立飞.2010.西南天山特克斯科桑溶洞火山岩的锆石U-Pb年代学研究.岩石学报,26(8):2255~2263.
赵振华,熊小林,王强,白正华,梅厚钧.2004.新疆西天山莫斯早特石英钠长斑岩铜矿床———一个与埃达克质岩石有关的铜矿实例.岩石学报,20(2):249~258.
郑勇,黄文海,周义,赵振刚,郭新成,陈郑辉.2014.新疆备战铁矿侵入岩地球化学特征、成岩时代及地质意义.地球科学与环境学报,36(2):38~50.
Belousova E A,Griffin W L,O Reilly S Y and Fisher N I.2002.Igneous zircon:Trace element composition as an indicator ofsource rock type.Contributions to Mineralogy and Petrology,143:602~622.
Duggen S,Hoernle K,Van den Bogaard P and Garbe-Schǒnberg D.2005.Post-collisional transition from subduction-to intraplatetype magmatism in the westernmost Mediterranean:Evidencefor continental-edge delamination of subcontinental lithosphere.Journal of petrology,46(6):1155~1201.
Gao J,Long L,Klemd R,Qian Q,Liu D,Xiong X,Su W,Liu W,Wang Y,Yang F.2009.Tectonic evolution of the SouthTianshan orogen and adjacent regions,NW China:Geochemicaland age constraints of granitoid rocks.International Journal ofEarth Sciences,98(6):1221~1238.
Hawkesworth C,Turner S,Gallagher K,Hunter A,Bradshaw Tand Rogers N.1995.Calc-alkaline magmatism,lithosphericthinning and extension in the basin and range.Journal ofGeophysical Research.100(B6):10271~10286.
Liágeois J P,Navez J,Hertogen J and Black R.1998.Contrastingorigin of post-collisional high-K calc-alkaline and shoshoniticversus alkaline and peralkaline granitoids:The use of slidingnormalization.Lithos,45(1~4):1~28.
Ludwig K R.2003.User’s manual for Isoplot 3.00:AGeochronologucal toolkit for Microsoft Excel.BerkeleyGeochronology Center,Special Publication,4:70.
Morrison G W.1980.Characteristics and tectonic setting of theshoshonite rock association.Lithos,13(1):97~108.
Pearce J A,Norry M J.1979.Petrogenetic Implication of Ti,Zr,Yand Nb variation in volcanic rocks.Contrib.Mineral.Petrol,69:33~47.
Pearce J A.1982.Trace element characteristice of lacas fromdestructive plate boundaries.in:Anedsites.(R.S Thorp,ed.):525~847.
Sun S S,McDonough W F.1989.Chemical and isotope systematicsof oceanic basalts:implication for mantle compositionprocesses.Geological Society of London,Special Publication,42:313~345.
Taylor S R,McLennan S M.1985.The continental crust:itscomposition and evolution.Oxford:Blackwell,1~312.
Windley B F,Allen M B,Zhang Chi.1990.Paleozoic accretion andCenozoic redeformation of the Chinese Tian Shan range.CentralAsia.Geology,18:128~131.
Xiao W J,Windley B,Huang B C,Han C M,Yuan C,Chen H L,Sun M,Sun S,Li J L.2009.End-Permian to Mid-Triassictermination of the accretionary processes of the southernAltaids:Implication for the geodynamic evolution,Phanerozoiccontinental growth and matallogeny of Central Asia.International Journal of Earth Sciences,98(6):1189~1217.