湖南宁乡Ⅴ号岩管煌斑岩的岩石地球化学特征
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摘要
湖南宁乡钾镁煌斑岩是寻找湖南原生金刚石矿床的重要线索之一。本文通过对宁乡号煌斑岩岩管岩石地球化学的分析及其与其它地区钾镁煌斑岩的对比,确定宁乡号岩管煌斑岩与前人所研究的宁乡钾镁煌斑岩特征基本一致。但与西澳典型含金刚石的钾镁煌斑岩相比,其SiO2、Al2O3、MnO的含量较高,MgO、TiO2、K2O含量较低,这可能与钾镁煌斑岩的岩浆来源及演化过程有关,显示其地幔源区来源相对于西澳钾镁煌斑岩的源区较为富集。
Lamproite in Ningxiang,Hunan province,is one of the main clues for prospecting original diamond deposits in Hunan.In this paper,according to the lithogeochemical analysis of the No.5 pipe-like lamprophyre in Ningxiang and the compare with lamproites in other districts,it is believed that the characteristics of the No.5 pipe-like lamprophyre are similar to those of the other lamproites in Ningxiang which have been researched and identified as a kind of lamproite by predecessors.Compared with typical diamondiferous lamproites in Western Australia,the contents of SiO2,Al2O3 and MnO are higher and MgO,TiO2 and K2O are lower in the No.5 pipe-like lamprophyre in Ningxiang,which may be related with the magma source and evolutionary process,showing that the mantle source of lamproite in Ningxiang is more enriched than that in Western Australia.
Lamproite in Ningxiang,Hunan province,is one of the main clues for prospecting original diamond deposits in Hunan.In this paper,according to the lithogeochemical analysis of the No.5 pipe-like lamprophyre in Ningxiang and the compare with lamproites in other districts,it is believed that the characteristics of the No.5 pipe-like lamprophyre are similar to those of the other lamproites in Ningxiang which have been researched and identified as a kind of lamproite by predecessors.Compared with typical diamondiferous lamproites in Western Australia,the contents of SiO2,Al2O3 and MnO are higher and MgO,TiO2 and K2O are lower in the No.5 pipe-like lamprophyre in Ningxiang,which may be related with the magma source and evolutionary process,showing that the mantle source of lamproite in Ningxiang is more enriched than that in Western Australia.
引文
[1]马文运.沅江流域宝石级金刚石砂矿特征[J].湖南地质,1989,8(1).
[2]李荣清.湖南金刚石原生矿找矿研究的现状与展望[J].矿床地质,1996,15(增刊).
[3]刘观亮,张自超,李志昌,等.湖南宁乡钾镁煌斑岩中火山微球粒的初步研究[J].岩石矿物学杂志,1995,(3).
[4]李子云,马文运.宁乡县云影窝含金刚石镁煌斑岩地质特征[J].湖南地质,1993(4).
[5]饶家荣,王纪恒,曹一中.湖南深部构造[J].湖南地质,1993(增刊7).
[6]Scott Smith B.H,Skinner E.M.W,Loney.P.E.The Kapamba lamproites of the Luangwa valley,eastern Zambia[J].Proceedings of the Fourth International Kimberlite Conference.GeologicalSociety of Australia Special Publication,1989,14(I).
[7]张文宽,杨本锦.钾镁煌斑岩型金刚石矿床的岩石化学特征及其找矿意义[J].地质地球化学,1987(10).
[8]叶德隆,王群,杨金香,等.湖北大洪山南段的金伯利岩和钾镁煌斑岩[J].地质科技情报,1991(1).
[9]罗会文,杨光树.贵州省镇远地区钾镁煌斑岩岩石特征[J].岩石矿物学杂志,1989(2).
[10]Jaques A L,Lewis J D,Smith C B.The kimberlitic and lamproitic rocks of Western Australia[J],Geol Surv West Aust Bull,1986(132).
[11]Mitchell R.H.Petrology of lamproites[M].New York:Plenum Press,1991.
[12]Bergman S.C.,Lamproites and other potassium-rich igneous rocks:a review of their occurrence,mineralogy and geochemistry[J].Geological Society,Special Publication,1987,30.
[13]Mitchell R.H.Kimberlites:petrology,mineralogy and geochemistry[M].Plenum Press,1986.
[2]李荣清.湖南金刚石原生矿找矿研究的现状与展望[J].矿床地质,1996,15(增刊).
[3]刘观亮,张自超,李志昌,等.湖南宁乡钾镁煌斑岩中火山微球粒的初步研究[J].岩石矿物学杂志,1995,(3).
[4]李子云,马文运.宁乡县云影窝含金刚石镁煌斑岩地质特征[J].湖南地质,1993(4).
[5]饶家荣,王纪恒,曹一中.湖南深部构造[J].湖南地质,1993(增刊7).
[6]Scott Smith B.H,Skinner E.M.W,Loney.P.E.The Kapamba lamproites of the Luangwa valley,eastern Zambia[J].Proceedings of the Fourth International Kimberlite Conference.GeologicalSociety of Australia Special Publication,1989,14(I).
[7]张文宽,杨本锦.钾镁煌斑岩型金刚石矿床的岩石化学特征及其找矿意义[J].地质地球化学,1987(10).
[8]叶德隆,王群,杨金香,等.湖北大洪山南段的金伯利岩和钾镁煌斑岩[J].地质科技情报,1991(1).
[9]罗会文,杨光树.贵州省镇远地区钾镁煌斑岩岩石特征[J].岩石矿物学杂志,1989(2).
[10]Jaques A L,Lewis J D,Smith C B.The kimberlitic and lamproitic rocks of Western Australia[J],Geol Surv West Aust Bull,1986(132).
[11]Mitchell R.H.Petrology of lamproites[M].New York:Plenum Press,1991.
[12]Bergman S.C.,Lamproites and other potassium-rich igneous rocks:a review of their occurrence,mineralogy and geochemistry[J].Geological Society,Special Publication,1987,30.
[13]Mitchell R.H.Kimberlites:petrology,mineralogy and geochemistry[M].Plenum Press,1986.
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