河南省卢氏县张家村铁矿矿床地质特征及找矿前景
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摘要
卢氏张家村铁矿床位于华北陆块南缘多金属成矿带上,分别采用1∶50 000地质调查、1∶10 000地质草测、1∶10 000高磁剖面测量、激电中梯剖面测量和槽探工程控制等方法在矿区开展了地质勘查及研究工作,并对矿区地质特征、矿床地质特征及成因进行了详细探讨。研究表明:(1)矿体主要赋存于高山河组第三段紫红色砂岩、灰绿色砂岩、白色砂岩中,少量赋存于龙家园组内部的断裂带中,主体为沉积型铁矿床;(2)赋存于高山河组内部的铁矿共有3个层位,共发现了3条铁矿体,大致平行产出,矿区铁矿资源储量为小型;(3)矿石主要由赤铁矿组成,局部磁铁矿含量较多,工业类型属需选铁矿石;(4)该铁矿床向西至陕西境内楼房村一带仍有矿化显示,东西延长数十千米,构成了1个规模可观的铁矿成矿(区)带;(5)高山河组上部铁矿层的发现改变了以往有关"铁锰矿层仅在龙家园组底部产生"的认识,为该地区铁矿找矿工作开辟了新的思路。在上述分析的基础上,结合矿床地质特征、地球物理特征、找矿标志等,构建了该区沉积型铁矿的找矿模型,并初步圈定了3处找矿靶区,认为各靶区成矿潜力均较好,值得进一步开展工作。
Zhangjiacun Iron Deposit in Lushi County is located in the polymetallic metallogenic belt of the southern margin of North China continental block.In order to provide reliable reference for the further prospecting work in the mining area,by means of 1∶50 000 geological survey,1∶10 000 geological sketch survey,1∶10 000 high precision magnetic profile survey,IP intermediate gradient profile survey and trench engineering,the regional metallogenic geological background,geological characteristics of the mining area are analyzed and deposit genesis of the mining area are studied comprehensively.The study results show that:(1)the ore-body of deposit is mainly occurs in the aubergine sandstone,grey-green sandstone and white sandstone of the third member of Gaoshanhe Formation,a few ore-bodies occurs in the fault zones within Longjiayuan Formation,the main ore-body of the deposit is belongs to sedimentary iron deposit and superimposed with hydrothermal alteration;(2)3 approximately parallel iron ore bodies occurs in 3 layers in Gaoshanhe Formation,which iron resources reserves is small;(3)the main mineral of iron ores is hematite,the contents of magnetite is high in local area of the mining area,the ores need to be selected industrially;(4)the iron mineralization belt extends several tens kilometers in EW direction and westwards to Loufangcun Area in Shaanxi Province,which composes a sizable iron mineralization belt;(5)the discovery of the iron ore layers above Gaoshanhe Formation changed the old idea that the ferro-manganese deposit only occurs at the bottom of Longjiayuan Formation,which provide new indication to the prospecting work of iron deposit in this area.Based on the discussion results,combing with the geological characteristics and geophysical characteristics of the mining area and prospecting criteria of the area,the prospecting model of sedimentary iron deposit is established,three prospecting target areas are delineated,the further discussion results indicated that prospecting potential of the target areas are good.
Zhangjiacun Iron Deposit in Lushi County is located in the polymetallic metallogenic belt of the southern margin of North China continental block.In order to provide reliable reference for the further prospecting work in the mining area,by means of 1∶50 000 geological survey,1∶10 000 geological sketch survey,1∶10 000 high precision magnetic profile survey,IP intermediate gradient profile survey and trench engineering,the regional metallogenic geological background,geological characteristics of the mining area are analyzed and deposit genesis of the mining area are studied comprehensively.The study results show that:(1)the ore-body of deposit is mainly occurs in the aubergine sandstone,grey-green sandstone and white sandstone of the third member of Gaoshanhe Formation,a few ore-bodies occurs in the fault zones within Longjiayuan Formation,the main ore-body of the deposit is belongs to sedimentary iron deposit and superimposed with hydrothermal alteration;(2)3 approximately parallel iron ore bodies occurs in 3 layers in Gaoshanhe Formation,which iron resources reserves is small;(3)the main mineral of iron ores is hematite,the contents of magnetite is high in local area of the mining area,the ores need to be selected industrially;(4)the iron mineralization belt extends several tens kilometers in EW direction and westwards to Loufangcun Area in Shaanxi Province,which composes a sizable iron mineralization belt;(5)the discovery of the iron ore layers above Gaoshanhe Formation changed the old idea that the ferro-manganese deposit only occurs at the bottom of Longjiayuan Formation,which provide new indication to the prospecting work of iron deposit in this area.Based on the discussion results,combing with the geological characteristics and geophysical characteristics of the mining area and prospecting criteria of the area,the prospecting model of sedimentary iron deposit is established,three prospecting target areas are delineated,the further discussion results indicated that prospecting potential of the target areas are good.
引文
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[12]张国伟,张本仁,袁学诚,等.秦岭造山带与大陆动力学[M].北京:科学出版社,2001.Zhang Guowei,Zhang Benren,Yuan Xuecheng,et al.Qinling Mountains Orogenic Belt and Continental Dynamics[M].Beijing:Science Press,2001.
[13]杨洪明.高精度磁测在大台沟铁矿勘查中的应用[J].资源信息与工程,2016(6):43-45Yang Hongming.Application of high precision magnetic survey on iron deposit exploration in Dataigou[J].Resource Information and Engineering,2016(6):43-45.
[14]祝新友,王京彬,王艳丽,等.宁乡式铁矿成因新解--后生热液成因的地质与地球化学证据[J].矿产勘查,2015(1):7-16.Zhu Xinyou,Wang Jingbin,Wang Yanli,et al.Study on genesis of Ningxiang type iron deposit:new geological and geochemical evidence for epigenetic hydrothermal genesis[J].Mineral Exploration,2015(1):7-16.
[15]李厚民,王登红,李立兴,等.中国铁矿成矿规律及重点矿集区资源潜力分析[J].中国地质,2012,39(3):559-580.Li Houmin,Wang Denghong,Li Lixing,et al.Metallogeny of iron deposits and resource potential of major iron minerogenetic units in China[J].Geology in China,2012,39(3):559-580.
[2]李俊健.华北陆块主要成矿区带成矿规律和找矿方向[M].天津:天津科学技术出版社,2006.Li Junjian.Metallogenic Regularity and Prospecting Direction of Major Metallogenic Belt in North China Block[M].Tianjin:Tianjin Science and Technology Press,2006.
[3]王平安.秦岭造山带区域矿床成矿系列、构造-成矿旋回与演化[M].北京:地质出版社,1998.Wang Pingan.Metallogenic Series,Tectonic Metallogenic Cycles and Evolution of the Qinling Mountains Orogenic Belt[M].Beijing:Geological Publishing House,1998.
[4]武广,陈毓川,李宗彦,等.豫西银家沟硫铁多金属矿床流体包裹体和同位素特征[J].地质学报,2013,87(3):353-374.Wu Guang,Chen Yuchuan,Li Zongyan,et al.The Yinjiagou pyrite polym-etallic-deposit,fluid inclusion and isotope characteristics[J].Acta Geological Sinica,2013,87(3):353-374.
[5]徐国风.论豫西银家沟钼-铜-硫铁矿矿床的矿质来源[J].河南地质,1985(S):266-270.Xu Guofeng.Discussion on the mineral source of Yinjiagou molybdenum-copper-pyrite deposit in Western Henan Province[J].Henan Geology,1985(S):266-270.
[6]武广,陈毓川,李宗彦,等.豫西银家沟硫铁多金属矿床Re-Os和40Ar-39Ar年龄及其地质意义[J].矿床地质,2013,32(4):809-822.Wu Guang,Chen Yuchuan,Li Zongyan,et al.Molybdenite Re-Os and sericite40Ar-39Ar ages of Yinjiagou prite-polymetallic deposit in Western Henan Province,and their geological significance[J].Mineral Deposits,2013,32(4):809-822.
[7]周红春,刘传权,郭克剑,等.河南省卢氏县张家山铁矿地质特征及成因浅析[J].华南地质与矿产,2008(2):43-48.Zhou Hongchun,Liu Chuanquan,Guo Kejian,et al.Geological cha-County,Henan Province[J].Geology and Mineral Resources of South China,2008(2):43-48.
[8]刘传权,蔡志超,姬清海,等.卢氏县张家山铁矿床地球化学特征及成矿物质来源[J].西北地质,2015,48(4):88-99.Liu Chuanquan,Cai Zhichao,Ji Qinghai,et al.Geochemical characteristics and materials sources of the Zhangjiashan iron deposit in Lushi Country[J].Northwestern Geology,2015,48(4):88-99.
[9]赵静,梁金龙,韩波.海底喷流成矿作用研究现状及展望[J].化工矿产地质,2015,37(4):236-244.Zhao Jing,Liang Jinlong,Hanbo.A review and prospect of research on sedimentary exhalative deposits[J].Geology of Chemical Minerals,2015,37(4):236-244.
[10]王长明,邓军,张寿庭,等.河南卢氏-栾川地区铅锌矿成矿多样性分析及成矿预测[J].地质通报,2005,24(10):1074-1080.Wang Changming,Deng Jun,Zhang Shouting,et al.Analysis of diversity of lead-zinc mineralization and prediction of ore deposits in the Lushi-Luanchuan Area,Henan,China[J].Geological Bulletin of China,2005,24(10):1074-1080.
[11]刘晓峰,吕国芳.豫西杜关锰结核稀土元素地球化学[J].中国锰业,1999,17(1):24-29.Liu Xiaofeng,Lv Guofang.Rare earth element geochemistry of manganese nodules in Duguan Area of West Henan Province[J].Chinese Manganese Industry,1999,17(1):24-29.
[12]张国伟,张本仁,袁学诚,等.秦岭造山带与大陆动力学[M].北京:科学出版社,2001.Zhang Guowei,Zhang Benren,Yuan Xuecheng,et al.Qinling Mountains Orogenic Belt and Continental Dynamics[M].Beijing:Science Press,2001.
[13]杨洪明.高精度磁测在大台沟铁矿勘查中的应用[J].资源信息与工程,2016(6):43-45Yang Hongming.Application of high precision magnetic survey on iron deposit exploration in Dataigou[J].Resource Information and Engineering,2016(6):43-45.
[14]祝新友,王京彬,王艳丽,等.宁乡式铁矿成因新解--后生热液成因的地质与地球化学证据[J].矿产勘查,2015(1):7-16.Zhu Xinyou,Wang Jingbin,Wang Yanli,et al.Study on genesis of Ningxiang type iron deposit:new geological and geochemical evidence for epigenetic hydrothermal genesis[J].Mineral Exploration,2015(1):7-16.
[15]李厚民,王登红,李立兴,等.中国铁矿成矿规律及重点矿集区资源潜力分析[J].中国地质,2012,39(3):559-580.Li Houmin,Wang Denghong,Li Lixing,et al.Metallogeny of iron deposits and resource potential of major iron minerogenetic units in China[J].Geology in China,2012,39(3):559-580.