黑龙江省毛家屯花岗岩中碱性暗色矿物特征及其地质意义
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摘要
碱性暗色矿物作为具有特殊指示意义的矿物,其存在对岩浆演化过程具有重要的意义。毛家屯花岗岩体位于兴蒙造山带东部的小兴安岭—张广才岭南段,岩体内部发育碱性暗色矿物。以毛家屯岩体内部发育的碱性暗色矿物为研究对象,进行了矿物学和矿物化学电子探针分析。研究表明,碱性角闪石的类型为铁-镁铝钠闪石,具有富碱,尤其富钠、富硅、富铁、贫钙、镁、钛等特征。辉石的类型为霓辉石,化学特征上高硅-高钠,高铁,低钛、镁、铝、锰。碱性暗色矿物主岩为碱性岩,成因类型为铝质A型花岗岩类。毛家屯花岗岩碱性角闪石具有很低的M值,证明其来源于地壳物质的熔融。毛家屯花岗岩中碱性角闪石的特征指示,在结晶过程中,岩浆体系处于封闭还原条件,且岩体从中央到边部存在偏酸性和偏基性组分分带现象。结合前人的同位素和年代学方面的分析资料,认为毛家屯碱性花岗岩形成于造山后期伸展转换环境中。
Existence of alkaline melano-minerals is of great indicative significance for magmatic evolution processes. The Maojiatun alkaline granite body is located at the southern part of the Little Xing'an range-Zhangguangcai range,which represents the eastern part of the Xingmeng orogenic belt. The intrusion is characterized by the presence of alkaline melano-minerals with high contents of alkali and iron. In this study,we analyzed the mineralogical and EPMA chemical characteristics of the alkaline melano-minerals in the Maojiatun granite. Our study shows that the amphibole is iron magnesium-alumina natrium amphibole,and is featured by being Si,Na and Fe rich,and Ca,Mg and Al poor. The pyroxene is aegirine-augite,which is characterized by having high Si,Na and Fe,and low Ti,Mg,Al and Mn. We have determined that the host rock is alkaline magmatite,and the genetic type is aluminum-type A granite. Maojiatun alkaline granite has low M value,which indicates that it may have come from the remelting of juvenile crust. During crystallization,the magma system may have been under a closed and reducing condition,and there is a distinct zonation of acid and basic rocks from the center to margin of the intrusion. We concluded that the Maojiatun alkaline granite was formed in a late orogenic transition setting.
Existence of alkaline melano-minerals is of great indicative significance for magmatic evolution processes. The Maojiatun alkaline granite body is located at the southern part of the Little Xing'an range-Zhangguangcai range,which represents the eastern part of the Xingmeng orogenic belt. The intrusion is characterized by the presence of alkaline melano-minerals with high contents of alkali and iron. In this study,we analyzed the mineralogical and EPMA chemical characteristics of the alkaline melano-minerals in the Maojiatun granite. Our study shows that the amphibole is iron magnesium-alumina natrium amphibole,and is featured by being Si,Na and Fe rich,and Ca,Mg and Al poor. The pyroxene is aegirine-augite,which is characterized by having high Si,Na and Fe,and low Ti,Mg,Al and Mn. We have determined that the host rock is alkaline magmatite,and the genetic type is aluminum-type A granite. Maojiatun alkaline granite has low M value,which indicates that it may have come from the remelting of juvenile crust. During crystallization,the magma system may have been under a closed and reducing condition,and there is a distinct zonation of acid and basic rocks from the center to margin of the intrusion. We concluded that the Maojiatun alkaline granite was formed in a late orogenic transition setting.
引文
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[12]尹京武,邵兴坤,杨海涛,等.新疆拜城波孜果尔碱性岩中副矿物的特征[J].矿床地质,2013,32(2):337-352.
[13]郑巧荣.由电子探针分析值计算Fe3+和Fe2+[J].矿物学报,1983,3(1):57-64.
[14]李胜荣.结晶学与矿物学[M].北京:地质出版社,2008:1-346.
[15]LEAKE B E,WOOLEY A R,ARPS C E S,et al.Nomenclature of amphiboles:Report of the Subcommittee on Amphiboles of the International Mineralogical Association,Commission on New Minerals and Mineral Names[J].American Mineralogist,1997,82(9):1019-1037.
[16]LEAKE B E,WOOLLEY A R,BIRCH W D,et al.Nomenclature of amphiboles:Additions and revisions to the International Mineralogical Association'amphibole nomenclature[J].Mineralogical Magazine,2004,68(1):209-215.
[17]MORIMOTO N,黄婉康.辉石命名法[J].矿物学报,1988,8(4):3-19.
[18]马莲花,蔡永丰,刘希军,等.云南个旧卡房锡矿田花岗岩黑云母矿物化学特征及其成岩成矿意义[J].高校地质学报,2018,24(5):68-77.
[19]WASTON E B,HARRISON T M.Zircon saturation revisited:temperature and composition effects in a variety of crustal magma types[J].Earth and Planetary Science Letters,1983,64(2):295-304.
[20]陈光远.成因矿物学与找矿矿物学[M].重庆:重庆出版社,1988:1-50.
[21]RIDOLFI F,PUERINI M,RENZULLI A,et al.The magmatic feeding system of El Reventador volcano(Sub-Andean zone,Ecuador)constrained by texture,mineralogy and thermobarometry of the 2002 erupted products[J].Journal of Volcanology&Geothermal Research,2008,176(1):94-106.
[22]刘昌实,陈小明,陈培荣,等.A型岩套的分类、判别标志和成因[J].高校地质学报,2003,9(4):573-591.
[23]李小伟,莫宣学,赵志丹,等.关于A型花岗岩判别过程中若干问题的讨论[J].地质通报,2010,29(增刊1):278-285.
[24]林培英,邰道乾,鄂安元.内蒙其特敖包的镁钠铁闪石的研究[J].地质论评,1986,32(6):532-540.
[25]薛君治,白学让,陈武.成因矿物学[M].武汉:中国地质大学出版社,1990:1-161.
[26]姜常义,安三元.论火成岩中钙质角闪石的化学组成特征及其岩石学意义[J].矿物岩石,1984(3):4-12.
[27]STRECK M J,DUNGAN M A,BUSSY F,et al.Mineral inventory of continuously erupting basaltic andesites at Arenal volcano,Costa Rica:implications for interpreting monotonous,crystal-rich,mafic arc stratigraphies[J].Journal of Volcanology&Geothermal Research,2005,140(1/3):133-155.
[28]许继锋.米仓山碱性岩中的主要矿物研究及其成因信息[J].岩石矿物学杂志,1993(3):269-278.
[29]王方正.岩石物理化学[M].郑州:河南科学技术出版社,1987:1-334.
[30]RIDOLFI F,RENZULLI A,PUERINI M.Stability and chemical equilibrium of amphibole in calc-alkaline magmas:an overview,new thermobarometric formulations and application to subduction-related volcanoes[J].Contributions to Mineralogy&Petrology,2010,160(1):45-66.
[31]ERNST W G,LIU J.Experimental phase-equilibrium study of Al-and Ti-contents of calcic amphibole in MORB-a semiquantitative thermobarometer[J].American Mineralogist,1998,83(9/10):952-969.
[32]EUGSTER H P,WONES D R.Stability relations of the ferruginous biotite,Annite[J].Journal of Petrology,1962,3(1):2648-2697.
[33]王濮,潘兆橹,翁玲宝.系统矿物学[M].北京:地质出版社,1982:1-263.
[34]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,1991:1-139.
[35]童英,洪大卫,王涛,等.中蒙边境中段花岗岩时空分布特征及构造和找矿意义[J].地球学报,2010,31(3):395-412.
[36]许文良,王枫,裴福萍,等.中国东北中生代构造体制与区域成矿背景:来自中生代火山岩组合时空变化的制约[J].岩石学报,2013,29(2):339-353.
[37]EBY G N.Chemical subdivision of the A-type granitoids:Petrogenetic and tectonic implications[J].Geology,1992,20(7):641.
[38]BONIN B.A-type granites and related rocks;evolution of a concept,problems and prospects[J].Lithos,2007,97:1-29.
[2]韦栋梁,夏斌,张玉泉,等.滇西卓潘-六合碱性岩的辉石成分及其岩石化学特征[J].矿物岩石,2005,5(2):15-19.
[3]夏斌,李建峰,张玉泉,等.江苏省东海县片麻状碱性花岗岩的成因及年代学研究[J].地质科学,2009,44(1):213-230.
[4]谢应雯,张玉泉.横断山区花岗岩类中角闪石的标型特征及其成因意义[J].矿物学报,1990,10(1):95-105.
[5]谢应雯,张玉泉.青藏高原东部及邻区富碱侵入岩中的角闪石和辉石[J].矿物学报,1998,18(1):90-96.
[6]赵广涛,王文正.崂山花岗岩中角闪石成分的变化及其意义[J].青岛海洋大学学报,1998,28(4):609-614.
[7]金秉福,岳伟,王昆山.黄河沉积中角闪石矿物晶体化学特征和成因分析[J].海洋学报,2013,35(1):131-143.
[8]赵斌.在高温高压条件下合成纤维状碱性角闪石的实验研究[J].地球化学,1973(2):113-130.
[9]杨富贵,王中刚,刘丛强,等.西北准噶尔地区碱性花岗岩体中角闪石的地质地球化学意义[J].矿物学报,1999,19(1):70-76.
[10]WU F Y,SUN D Y,LI H,et al.A-type granites in Northeastern China:Age and geochemical constraints on their petrogenesis[J].Chemical Geology,2002,187(1/2):143-173.
[11]林强,葛文春,吴福元,等.大兴安岭中生代花岗岩类的地球化学[J].岩石学报,2004,20(3):403-412.
[12]尹京武,邵兴坤,杨海涛,等.新疆拜城波孜果尔碱性岩中副矿物的特征[J].矿床地质,2013,32(2):337-352.
[13]郑巧荣.由电子探针分析值计算Fe3+和Fe2+[J].矿物学报,1983,3(1):57-64.
[14]李胜荣.结晶学与矿物学[M].北京:地质出版社,2008:1-346.
[15]LEAKE B E,WOOLEY A R,ARPS C E S,et al.Nomenclature of amphiboles:Report of the Subcommittee on Amphiboles of the International Mineralogical Association,Commission on New Minerals and Mineral Names[J].American Mineralogist,1997,82(9):1019-1037.
[16]LEAKE B E,WOOLLEY A R,BIRCH W D,et al.Nomenclature of amphiboles:Additions and revisions to the International Mineralogical Association'amphibole nomenclature[J].Mineralogical Magazine,2004,68(1):209-215.
[17]MORIMOTO N,黄婉康.辉石命名法[J].矿物学报,1988,8(4):3-19.
[18]马莲花,蔡永丰,刘希军,等.云南个旧卡房锡矿田花岗岩黑云母矿物化学特征及其成岩成矿意义[J].高校地质学报,2018,24(5):68-77.
[19]WASTON E B,HARRISON T M.Zircon saturation revisited:temperature and composition effects in a variety of crustal magma types[J].Earth and Planetary Science Letters,1983,64(2):295-304.
[20]陈光远.成因矿物学与找矿矿物学[M].重庆:重庆出版社,1988:1-50.
[21]RIDOLFI F,PUERINI M,RENZULLI A,et al.The magmatic feeding system of El Reventador volcano(Sub-Andean zone,Ecuador)constrained by texture,mineralogy and thermobarometry of the 2002 erupted products[J].Journal of Volcanology&Geothermal Research,2008,176(1):94-106.
[22]刘昌实,陈小明,陈培荣,等.A型岩套的分类、判别标志和成因[J].高校地质学报,2003,9(4):573-591.
[23]李小伟,莫宣学,赵志丹,等.关于A型花岗岩判别过程中若干问题的讨论[J].地质通报,2010,29(增刊1):278-285.
[24]林培英,邰道乾,鄂安元.内蒙其特敖包的镁钠铁闪石的研究[J].地质论评,1986,32(6):532-540.
[25]薛君治,白学让,陈武.成因矿物学[M].武汉:中国地质大学出版社,1990:1-161.
[26]姜常义,安三元.论火成岩中钙质角闪石的化学组成特征及其岩石学意义[J].矿物岩石,1984(3):4-12.
[27]STRECK M J,DUNGAN M A,BUSSY F,et al.Mineral inventory of continuously erupting basaltic andesites at Arenal volcano,Costa Rica:implications for interpreting monotonous,crystal-rich,mafic arc stratigraphies[J].Journal of Volcanology&Geothermal Research,2005,140(1/3):133-155.
[28]许继锋.米仓山碱性岩中的主要矿物研究及其成因信息[J].岩石矿物学杂志,1993(3):269-278.
[29]王方正.岩石物理化学[M].郑州:河南科学技术出版社,1987:1-334.
[30]RIDOLFI F,RENZULLI A,PUERINI M.Stability and chemical equilibrium of amphibole in calc-alkaline magmas:an overview,new thermobarometric formulations and application to subduction-related volcanoes[J].Contributions to Mineralogy&Petrology,2010,160(1):45-66.
[31]ERNST W G,LIU J.Experimental phase-equilibrium study of Al-and Ti-contents of calcic amphibole in MORB-a semiquantitative thermobarometer[J].American Mineralogist,1998,83(9/10):952-969.
[32]EUGSTER H P,WONES D R.Stability relations of the ferruginous biotite,Annite[J].Journal of Petrology,1962,3(1):2648-2697.
[33]王濮,潘兆橹,翁玲宝.系统矿物学[M].北京:地质出版社,1982:1-263.
[34]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,1991:1-139.
[35]童英,洪大卫,王涛,等.中蒙边境中段花岗岩时空分布特征及构造和找矿意义[J].地球学报,2010,31(3):395-412.
[36]许文良,王枫,裴福萍,等.中国东北中生代构造体制与区域成矿背景:来自中生代火山岩组合时空变化的制约[J].岩石学报,2013,29(2):339-353.
[37]EBY G N.Chemical subdivision of the A-type granitoids:Petrogenetic and tectonic implications[J].Geology,1992,20(7):641.
[38]BONIN B.A-type granites and related rocks;evolution of a concept,problems and prospects[J].Lithos,2007,97:1-29.