冀北张麻井铀钼矿床黄铁矿化蚀变岩地球化学迁移特征及与成矿关系亲缘性的讨论
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摘要
张麻井铀钼矿床是中国北方最大的与火山岩有关的热液铀矿床,围岩蚀变广泛发育,其中黄铁矿化在该矿床分布虽较为局限,但是与铀钼成矿关系密切。为了研究黄铁矿化蚀变与铀、钼成矿的亲缘关系,文章对张麻井的黄铁矿化蚀变岩进行主、微量元素分析,并选择Yb作为不活动组分,使用质量平衡迁移计算方法,利用Grant公式对其组分迁移进行定量计算。岩石地球化学特征显示,黄铁矿化蚀变岩的TFeO含量极高,介于11.24%～24.57%之间(平均18.45%),其中Fe_2O_3含量10.78%～25.25%(平均18.64%)、FeO含量1.43%～1.90%(平均1.69%),Fe_2O_3/FeO比值平均为10.99,有可能受到后期氧化。黄铁矿化蚀变岩在Isocon图解上等浓度线斜率小于1,表明整体发生了组分的带入,带入的主要组分为大量的TFeO(131倍),成矿元素Mo(884倍)、Pb(11倍)、U(4.9倍)、V(2.8倍)、Ta(0.44倍)、Cu(0.64倍),碱金属Na_2O(0.45倍),以及Cd(424倍)、Bi(13倍)等;带出的主要组分有碱金属Li(-0.73)、K_2O(-0.17),成矿元素Zn(-0.38)、Cr(-0.37),以及Eu(-0.58)、Sc(-0.25)等。其中SiO_2略微减少(-0.03),带入的Mo含量远大于U的含量,据此认为黄铁矿化与钼成矿关系更为密切。
The Zhangmajing uranium deposit is the largest volcanic-related hydrothermal uranium deposit in northern China, which wall-rock alteration was widely developed. The distribution of pyrite mineralization in this deposit is relatively limited, but closely related to mineralization. In order to study the relationship between pyrite transformation and uranium mineralization, molybdenum mineralization, the main trace element analysis of the pyrite-altered rock in Zhangmajing was carried out. This paper used the mass balance migration method using Yb as the inactive component to calculate its component migration with the Grant formula. The geochemical characteristics of the rocks showed that the content of TFeO in pyrite altered rock was extremely high, ranging from11.24% to 24.57%(average 18.45%), of which Fe_2O_3 content was 10.78%～25.25%(average 18.64%), FeO content was 1.43%～1.90%(average 1.69%). The average Fe_2O_3/FeO ratio was 10.99, which might be affected by subsequent oxidation. The slope of the iso-concentration line of the pyrite-altered rock was less than 1 in the Isocon diagram, indicating that the whole component had been taken in. The taken-in component was mainly the large amount of TFeO(131 times), ore-forming element including Mo(884 times), Pb(11 times), U(4.9 times), V(2.8 times), Ta(0.44 times), Cu(0.64 times), and alkali metal Na_2 O(0.45 times), and Cd(424 times), Bi(13 times), etc. In addition, the alkali metal Li(-0.73), K_2 O(-0.17), ore-forming elements Zn(-0.38), Cr(-0.37), and Eu(-0.58), Sc(-0.25) and other components were taken out. Among them, SiO_2 was slightly reduced(-0.03), and the taken-in Mo content was much higher than U which had relatively consistent migration characteristics with those of molybdenum ore. It could be concluded that t pyrite altered rocks were closely molybdenum mineralization.
The Zhangmajing uranium deposit is the largest volcanic-related hydrothermal uranium deposit in northern China, which wall-rock alteration was widely developed. The distribution of pyrite mineralization in this deposit is relatively limited, but closely related to mineralization. In order to study the relationship between pyrite transformation and uranium mineralization, molybdenum mineralization, the main trace element analysis of the pyrite-altered rock in Zhangmajing was carried out. This paper used the mass balance migration method using Yb as the inactive component to calculate its component migration with the Grant formula. The geochemical characteristics of the rocks showed that the content of TFeO in pyrite altered rock was extremely high, ranging from11.24% to 24.57%(average 18.45%), of which Fe_2O_3 content was 10.78%～25.25%(average 18.64%), FeO content was 1.43%～1.90%(average 1.69%). The average Fe_2O_3/FeO ratio was 10.99, which might be affected by subsequent oxidation. The slope of the iso-concentration line of the pyrite-altered rock was less than 1 in the Isocon diagram, indicating that the whole component had been taken in. The taken-in component was mainly the large amount of TFeO(131 times), ore-forming element including Mo(884 times), Pb(11 times), U(4.9 times), V(2.8 times), Ta(0.44 times), Cu(0.64 times), and alkali metal Na_2 O(0.45 times), and Cd(424 times), Bi(13 times), etc. In addition, the alkali metal Li(-0.73), K_2 O(-0.17), ore-forming elements Zn(-0.38), Cr(-0.37), and Eu(-0.58), Sc(-0.25) and other components were taken out. Among them, SiO_2 was slightly reduced(-0.03), and the taken-in Mo content was much higher than U which had relatively consistent migration characteristics with those of molybdenum ore. It could be concluded that t pyrite altered rocks were closely molybdenum mineralization.
引文
蔡煜琦,张金带,李子颖,等.2015.中国铀矿资源特征及成矿规律概要[J].地质学报,89(6):1051-1069.
陈东欢,范洪海,王凤岗,等.2011.沽源-红山子地区火山岩型铀矿床蚀变特征[J].铀矿地质,27(2):88-94.
崔盛芹.2002.燕山地区中新生代陆内造山作用[M].北京:地质出版社.
郭鸿军,马申坤.2009.河北省沽源县张麻井铀钼矿控矿因素分析及外围找矿前景探讨[J].地质调查与研究,32(3):210-215.
郭顺,叶凯,陈意,等.2013.开放地质体系中物质迁移质量平衡计算方法介绍[J].岩石学报,29(5):1486-1498.
河北省地质矿产局.1996.河北省岩石地层[M].武汉:中国地质大学出版社:74-105.
胡受奚,叶瑛,方长泉.2004.交代蚀变岩岩石学及其找矿意义[M].北京:地质出版社.
姜山,潘家永,段力,等.2011.燕山西段蔡家营-御道口断裂带的地质特征及其对铀成矿的控制作用[J].东华理工大学学报(自然科学版),34(4):301-307.
李锦轶,张进,杨天南,等.2009.北亚造山区南部及其毗邻地区地壳构造分区与构造演化[J].吉林大学学报(地球科学版),39(4):584-605.
李献华,刘颖,涂湘林,等.2002.硅酸盐岩石化学组成的ICPAES和ICPMS准确测定:酸溶与碱熔分解样品方法的对比[J].地球化学,31(3):289-294.
刘铁庚,张乾,叶霖,等.自然界中ZnS-CdS完全类质同象系列的发现和初步研究[J].中国地质,2004,31(1):40-45.
罗毅.1993.460火山岩型铀-钼矿床的构造-矿化分带及成矿模式研究[J].铀矿地质,(1):23-28.
罗毅.1994.460大型火山岩型铀-钼矿床的构造-矿化垂向分带及成矿模式研究[J].矿床地质,(s1):64-66.
吕增尧.2012.张麻井铀钼矿床地质特征及沽源盆地找矿思路[J].矿产勘查,3(4):452-457.
内蒙古自治区地质矿产局1997.内蒙古自治区岩石地层[M].武汉:中国地质大学出版社.
沈光银.2007.460铀-钼矿床控矿因素及矿床成因探讨[J].矿产与地质,21(5):509-514.
沈光银.2010.大官厂铀多金属矿床的发现和发展过程[J].有色金属(矿山部分),62(3):19-22.
宋凯,巫建华,牛子良,等.2017.冀北多本沟盆地流纹岩年代学、地球化学特征及地质意义[J].东华理工大学学报(自然科学版),40(4):323-333.
宋凯,巫建华,郭恒飞,等.2019.冀北张麻井铀钼矿床上部叠加成矿的铀、钼矿石地球化学证据[J].矿床地质,终审已过待刊.
王剑锋.1986.铀地球化学教程[M].北京:原子能出版社.
巫建华,武珺,祝洪涛,等.2013.大兴安岭红山子盆地火山岩系岩石地层对比[J].高校地质学报,19(3):472-483.
巫建华,丁辉,牛子良,等.2015.河北沽源张麻井铀-钼矿床围岩SHRIMP锆石U-Pb定年及其地质意义[J].矿床地质,34(4):757-768.
巫建华,张婧妍,姜山,等.2017.冀北沽源铀矿田粗面岩的年代学、地球化学特征及岩石成因[J].地球化学,46(2):105-122.
余达淦,吴仁贵,陈培荣.2005.铀资源地质学[M].哈尔滨:哈尔滨工程大学出版社.
章邦桐.1990.内生铀矿床及其研究方法[M].北京:原子能出版社.
张金带,李子颖,蔡煜琦,等.2012.全国铀矿资源潜力评价工作进展与主要成果[J].铀矿地质,28(6):321-326.
张雅菲,巫建华,姜山,等.2016.冀北大滩盆地铀(钼)成矿流纹岩-花岗斑岩SHRIMP锆石U-Pb定年、地球化学及Sr-Nd同位素特征[J].岩石学报,32(1):193-211.
周德安.1988.460矿床富矿形成中的叠加成矿作用[J].铀矿地质,(3):13-18.
Ague J J.2003.Fluid infiltration and transport of major,minor,and trace elements during regional metamorphism of carbonate rocks,Wepawaug Schist,Connecticut,USA[J].American Journal of Science,303(9):753-816.
Brimhal G H and Dietrich W F.1987.Constitutive mass balance relations between chemical composition,volume,density,porosily and strain in metasomatic hydrochemical systems:Results on weathering and pedogenesis[J].Gcochimn.Cosmochim.Acta,51:567-587.
Brimhall G H,Lewis C J,Ague J J,et al.1988.Metal enrichment in bauxitesby deposition of chemically mature aeolian dust[J].Nature,333(6176):819-824.
Cail T L and Cline J S.2001.Alteration Associated with Gold Deposition at the Getchell Carlin-Type Gold Deposit,North-Central Nevada[J].Economic Geology,96(6):1343-1359.
Chavagnac V,Kramers J D,Nagler T F,et al.2001.The behaviour of Nd and Pb isotopes during 2.0 Ga migmatization in paragneisses of the Central Zone of the Limpopo Belt(South Africa and Botswana)[J].Precambrian Research,112(1-2):51-86.
Etheridge M A,Wall V J and Vernon R H.2010.The role of the fluid phase during regional metamorphism and deformation[J].Journal of Metamorphic Geology,1(3):205-226.
Grant J A.1986.The isocon diagram—a simple solution to Gresens'equation for metasomatic alteration[J].Economic Geology,81(8):1976-1982.
Grant J A.2005.Isocon analysis:A brief review of the method and applications[J].Physics&Chemistry of the Earth Parts A/b/c,30(17-18):997-1004.
Gresens R L.1967.Composition-volume relationships of metasomatism[J].Chemical Geology,2(67):47-65.
Guo S,Ye K,Chen Y,et al.2009.A normalization solution to mass transfer illustration of multiple progressively altered samples using the isocon diagram[J].Economic Geology,104(6):881-886.
Harlov D E,Wirth R and Hetherington C J.2011.Fluid-mediated partial alteration in monazite:the role of coupled dissolution-reprecipitation in element redistribution and mass transfer[J].Contributions to Mineralogy&Petrology,162(2):329-348.
Keller L M,Abart R,Stunitz H,et al.2004.Deformation,mass transfer and mineral reactions in an eclogite facies shear zone in a polymetamorphic metapelite(Monte Rosa nappe,western Alps)[J].Journal of Metamorphic Geology,22(2):97-118.
Kwon S,Park Y,Park C,et al.2009.Mass-balance analysis of bulk-rock chemical changes during mylonitization of a megacryst-bearing granitoid,Cheongsan shear zone,Korea[J].Journal of Asian Earth Sciences,35(6):489-501.
O'Hara K.1988.Fluid flow and volume loss during mylonitization:an origin for phyllonite in an overthrust setting,North Carolina U.S.A.[J].Tectonophysics,156(1):21-36.
Pennistondorland S C and Ferry J M.2008.Element mobility and scale of mass transport in the formation of quartz veins during regional metamorphism of the Waits River Formation,east-central Vermont[J].American Mineralogist,93(1):7-21.
Reynolds W,Smirnova I,Reynolds W,et al.2017.Hydrothermal flow-through treatment of wheat straw:Coupled heat and mass transfer modeling with changing bed properties[J].The Journal of Supercritical Fluids,133(2):625-639.
Somarin A K.2004.Geochemical effects of endoskarn formation in the Mazraeh Cu-Fe skarn deposit in northwestern Iran[J].Geochemistry Exploration Environment Analysis,4(4):307-3 15.
Xiao W J,Brian F W,Hao J,et al.2003.Accretion leading to collision and the Permian Solonker suture,Inner Mongolia,China:Termination of the central Asian orogenic belt[C].Tec tonics,22(6):1-21.
陈东欢,范洪海,王凤岗,等.2011.沽源-红山子地区火山岩型铀矿床蚀变特征[J].铀矿地质,27(2):88-94.
崔盛芹.2002.燕山地区中新生代陆内造山作用[M].北京:地质出版社.
郭鸿军,马申坤.2009.河北省沽源县张麻井铀钼矿控矿因素分析及外围找矿前景探讨[J].地质调查与研究,32(3):210-215.
郭顺,叶凯,陈意,等.2013.开放地质体系中物质迁移质量平衡计算方法介绍[J].岩石学报,29(5):1486-1498.
河北省地质矿产局.1996.河北省岩石地层[M].武汉:中国地质大学出版社:74-105.
胡受奚,叶瑛,方长泉.2004.交代蚀变岩岩石学及其找矿意义[M].北京:地质出版社.
姜山,潘家永,段力,等.2011.燕山西段蔡家营-御道口断裂带的地质特征及其对铀成矿的控制作用[J].东华理工大学学报(自然科学版),34(4):301-307.
李锦轶,张进,杨天南,等.2009.北亚造山区南部及其毗邻地区地壳构造分区与构造演化[J].吉林大学学报(地球科学版),39(4):584-605.
李献华,刘颖,涂湘林,等.2002.硅酸盐岩石化学组成的ICPAES和ICPMS准确测定:酸溶与碱熔分解样品方法的对比[J].地球化学,31(3):289-294.
刘铁庚,张乾,叶霖,等.自然界中ZnS-CdS完全类质同象系列的发现和初步研究[J].中国地质,2004,31(1):40-45.
罗毅.1993.460火山岩型铀-钼矿床的构造-矿化分带及成矿模式研究[J].铀矿地质,(1):23-28.
罗毅.1994.460大型火山岩型铀-钼矿床的构造-矿化垂向分带及成矿模式研究[J].矿床地质,(s1):64-66.
吕增尧.2012.张麻井铀钼矿床地质特征及沽源盆地找矿思路[J].矿产勘查,3(4):452-457.
内蒙古自治区地质矿产局1997.内蒙古自治区岩石地层[M].武汉:中国地质大学出版社.
沈光银.2007.460铀-钼矿床控矿因素及矿床成因探讨[J].矿产与地质,21(5):509-514.
沈光银.2010.大官厂铀多金属矿床的发现和发展过程[J].有色金属(矿山部分),62(3):19-22.
宋凯,巫建华,牛子良,等.2017.冀北多本沟盆地流纹岩年代学、地球化学特征及地质意义[J].东华理工大学学报(自然科学版),40(4):323-333.
宋凯,巫建华,郭恒飞,等.2019.冀北张麻井铀钼矿床上部叠加成矿的铀、钼矿石地球化学证据[J].矿床地质,终审已过待刊.
王剑锋.1986.铀地球化学教程[M].北京:原子能出版社.
巫建华,武珺,祝洪涛,等.2013.大兴安岭红山子盆地火山岩系岩石地层对比[J].高校地质学报,19(3):472-483.
巫建华,丁辉,牛子良,等.2015.河北沽源张麻井铀-钼矿床围岩SHRIMP锆石U-Pb定年及其地质意义[J].矿床地质,34(4):757-768.
巫建华,张婧妍,姜山,等.2017.冀北沽源铀矿田粗面岩的年代学、地球化学特征及岩石成因[J].地球化学,46(2):105-122.
余达淦,吴仁贵,陈培荣.2005.铀资源地质学[M].哈尔滨:哈尔滨工程大学出版社.
章邦桐.1990.内生铀矿床及其研究方法[M].北京:原子能出版社.
张金带,李子颖,蔡煜琦,等.2012.全国铀矿资源潜力评价工作进展与主要成果[J].铀矿地质,28(6):321-326.
张雅菲,巫建华,姜山,等.2016.冀北大滩盆地铀(钼)成矿流纹岩-花岗斑岩SHRIMP锆石U-Pb定年、地球化学及Sr-Nd同位素特征[J].岩石学报,32(1):193-211.
周德安.1988.460矿床富矿形成中的叠加成矿作用[J].铀矿地质,(3):13-18.
Ague J J.2003.Fluid infiltration and transport of major,minor,and trace elements during regional metamorphism of carbonate rocks,Wepawaug Schist,Connecticut,USA[J].American Journal of Science,303(9):753-816.
Brimhal G H and Dietrich W F.1987.Constitutive mass balance relations between chemical composition,volume,density,porosily and strain in metasomatic hydrochemical systems:Results on weathering and pedogenesis[J].Gcochimn.Cosmochim.Acta,51:567-587.
Brimhall G H,Lewis C J,Ague J J,et al.1988.Metal enrichment in bauxitesby deposition of chemically mature aeolian dust[J].Nature,333(6176):819-824.
Cail T L and Cline J S.2001.Alteration Associated with Gold Deposition at the Getchell Carlin-Type Gold Deposit,North-Central Nevada[J].Economic Geology,96(6):1343-1359.
Chavagnac V,Kramers J D,Nagler T F,et al.2001.The behaviour of Nd and Pb isotopes during 2.0 Ga migmatization in paragneisses of the Central Zone of the Limpopo Belt(South Africa and Botswana)[J].Precambrian Research,112(1-2):51-86.
Etheridge M A,Wall V J and Vernon R H.2010.The role of the fluid phase during regional metamorphism and deformation[J].Journal of Metamorphic Geology,1(3):205-226.
Grant J A.1986.The isocon diagram—a simple solution to Gresens'equation for metasomatic alteration[J].Economic Geology,81(8):1976-1982.
Grant J A.2005.Isocon analysis:A brief review of the method and applications[J].Physics&Chemistry of the Earth Parts A/b/c,30(17-18):997-1004.
Gresens R L.1967.Composition-volume relationships of metasomatism[J].Chemical Geology,2(67):47-65.
Guo S,Ye K,Chen Y,et al.2009.A normalization solution to mass transfer illustration of multiple progressively altered samples using the isocon diagram[J].Economic Geology,104(6):881-886.
Harlov D E,Wirth R and Hetherington C J.2011.Fluid-mediated partial alteration in monazite:the role of coupled dissolution-reprecipitation in element redistribution and mass transfer[J].Contributions to Mineralogy&Petrology,162(2):329-348.
Keller L M,Abart R,Stunitz H,et al.2004.Deformation,mass transfer and mineral reactions in an eclogite facies shear zone in a polymetamorphic metapelite(Monte Rosa nappe,western Alps)[J].Journal of Metamorphic Geology,22(2):97-118.
Kwon S,Park Y,Park C,et al.2009.Mass-balance analysis of bulk-rock chemical changes during mylonitization of a megacryst-bearing granitoid,Cheongsan shear zone,Korea[J].Journal of Asian Earth Sciences,35(6):489-501.
O'Hara K.1988.Fluid flow and volume loss during mylonitization:an origin for phyllonite in an overthrust setting,North Carolina U.S.A.[J].Tectonophysics,156(1):21-36.
Pennistondorland S C and Ferry J M.2008.Element mobility and scale of mass transport in the formation of quartz veins during regional metamorphism of the Waits River Formation,east-central Vermont[J].American Mineralogist,93(1):7-21.
Reynolds W,Smirnova I,Reynolds W,et al.2017.Hydrothermal flow-through treatment of wheat straw:Coupled heat and mass transfer modeling with changing bed properties[J].The Journal of Supercritical Fluids,133(2):625-639.
Somarin A K.2004.Geochemical effects of endoskarn formation in the Mazraeh Cu-Fe skarn deposit in northwestern Iran[J].Geochemistry Exploration Environment Analysis,4(4):307-3 15.
Xiao W J,Brian F W,Hao J,et al.2003.Accretion leading to collision and the Permian Solonker suture,Inner Mongolia,China:Termination of the central Asian orogenic belt[C].Tec tonics,22(6):1-21.
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