内蒙古鄂温克族自治旗头道桥铌钽矿床特征及成因
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摘要
本文是通过对内蒙古鄂温克族自治旗头道桥铌钽矿床地质条件的分析,对矿床的成因进行初步探讨。矿床产于侏罗系上统满克头鄂博组火山岩-次火山岩中,主要含矿岩性为流纹岩、流纹质火山碎屑岩和花岗斑岩等。岩石普遍受到交代蚀变作用,主要为钠长石化、硅化、高岭土化等。载矿矿物为烧绿石,在岩石中呈浸染状及细脉浸染状分布。矿床成因为与酸性岩有关的火山热液型矿床,目前国内还没有开发利用过这种类型的铌钽矿床。
Through the analysis of geological conditions of Toudaoqiao Nb-Ta deposit in Ewenki Banner of Inner Mongolia, the genesis of ore deposit is discussed in this paper. The deposit occurs in upper Jurassic Manketouebo volcano rock-subvolcanic rock, and the main lithology contains rhyolite, rhyolitic volcano clastic rocks and granite-porphyry. The rocks are generally metasomatic alteration, mainly contains sodium feldspathization, silicification and kaolinization etc. The carrier-mineral is pyrochlore, which disseminated and veinlet disseminated distribution in rocks. The deposit genesis is volcanic hydrothermal type deposit related to acidic rock. There rarely has development and utilization for this type of Nb-Ta deposit yet in China.
Through the analysis of geological conditions of Toudaoqiao Nb-Ta deposit in Ewenki Banner of Inner Mongolia, the genesis of ore deposit is discussed in this paper. The deposit occurs in upper Jurassic Manketouebo volcano rock-subvolcanic rock, and the main lithology contains rhyolite, rhyolitic volcano clastic rocks and granite-porphyry. The rocks are generally metasomatic alteration, mainly contains sodium feldspathization, silicification and kaolinization etc. The carrier-mineral is pyrochlore, which disseminated and veinlet disseminated distribution in rocks. The deposit genesis is volcanic hydrothermal type deposit related to acidic rock. There rarely has development and utilization for this type of Nb-Ta deposit yet in China.
引文
[1]牛军平,徐传波,郭瑞民,等.内蒙古自治区鄂温克族自治旗头道桥一带1:5万化探异常查证报告[R].2013.
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[3]张用夏.华南地区中生代岩浆活动与地幔热源的关系[J].中国地质科学院南京地质矿产研究所所刊,1986,7(4):53-63.
[4]陈俊,陆建军,陈卫锋,等.南岭地区钨锡铌钽花岗岩及其成矿作用[J].高校地质学报,2008,1(44):459-473.
[5]赵振华,熊小林,王强,乔玉楼.铌与钽的某些地球化学问题[J].地球化学,2008,3(74):304-320.
[6]杨树清.甘肃省交勒萨依铌钽矿矿体特征及找矿标志[J].甘肃科技,2009,2(516):29-30.
[2]幸世军,赣南铌钽、稀土矿床地质特征及找矿方向[J].矿产与地质,2003增刊,1(797):447-450.
[3]张用夏.华南地区中生代岩浆活动与地幔热源的关系[J].中国地质科学院南京地质矿产研究所所刊,1986,7(4):53-63.
[4]陈俊,陆建军,陈卫锋,等.南岭地区钨锡铌钽花岗岩及其成矿作用[J].高校地质学报,2008,1(44):459-473.
[5]赵振华,熊小林,王强,乔玉楼.铌与钽的某些地球化学问题[J].地球化学,2008,3(74):304-320.
[6]杨树清.甘肃省交勒萨依铌钽矿矿体特征及找矿标志[J].甘肃科技,2009,2(516):29-30.