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通过在山西省古县中部一带开展地质工作,初步查明了区内地层、构造、岩浆岩分布情况,以及区内锰铁矿矿体赋存层位及空间展布。对锰铁矿的成矿地质条件进行了研究,了解了水文地质情况及开采技术条件,并根据锰铁矿分布规律对成矿远景进行了预测。得出了该区有进一步开展找矿工作的结论。 相似文献
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通过对安徽省庐江黄屯地区铁矿以往地质资料的收集、整理、研究以及近年来在该区及周边区域开展的地质找矿等野外实地工作,系统分析了该地区铁矿床成矿条件,总结了成矿规律,为该类型矿床的成矿预测提供依据。 相似文献
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云台山黄铁矿是江苏唯一的大型黄铁矿,矿区勘查经历了勘查-认识-再勘查-再认识至发现矿床的曲折过程,从中反映出基础地质与综合研究在矿床勘查中的重要地位。云台山黄铁矿说明了在现今的矿床勘查中必须重视和加强基础地质和综合研究这两方面的工作。基础工作是找矿取得突破的基本保证,综合研究可进一步掌握客观地质规律、指导地质勘查及提高工作成效。 相似文献
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《地质与勘探》1978,(4)
为了总结过去一年多来富铁矿地质工作的成果,交流找矿经验,制定南方富铁矿地质工作计划,争取在短期内富铁矿地质工作有较大的突破,冶金地质南方富铁矿协作小组第三次会议,在冶金部和云南省科委、云南省冶金局的亲切关怀下,于今年四月三日至十二日在昆明市召开。参加会议的有关单位的代表共180多名。一年多以来,南方各省(区)在富铁矿地质工作中,探明了一定的富铁矿储量,找到了一批有远景的普查勘探基地,提供了不少可供建设的矿区的地质报告。在成矿理论和找矿方向上,对海南石碌式富铁矿的成因和时代提出了一些新看法;对矿床的“层控”现象普遍受到重视;对菱铁矿床的工业意义和找矿前景有了新认识;对海相火山 相似文献
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程裕淇教授从事地质工作五十多年的过程中,曾对中、外许多铁矿进行过地质考察和详细工作,发表过许多论著,对铁矿进行过系统的分类和研究。该文论述了他在铁矿研究方面的工作和突出的贡献。 相似文献
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内蒙古包头地区铁矿资源远景预测 总被引:1,自引:0,他引:1
在当今矿产资源形势紧张的情况下,在已知矿区及其周边开展矿产资源远景预测工作将具有重要意义.内蒙古包头地区是我国重要的铁矿产区,可在该地区开展铁矿资源的远景预测工作.本文就着重探讨了内蒙古包头地区铁矿资源远景预测的方法.研究过程中,通过收集整理内蒙古包头地区地质资料、矿产资源分布与利用现状资料,结合前人研究成果,从地层、... 相似文献
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"玢岩型"铁矿和斑岩型铜矿是庐江-枞阳矿集区两个主要矿床类型,以往研究主要集中在矿床学、岩石学、年代学和地球化学等方面,地球物理工作开展相对较少。随着找矿深度不断加大,地球物理的作用越来越大。为建立典型矿床地球物理探测的解释"标尺",笔者选择泥河铁矿和沙溪铜矿为研究对象,开展三维音频大地电磁测深工作,获得了典型铜、铁矿床及围岩的三维电性结构模型。结果显示,玢岩(泥河)铁矿电性主体表现为层状结构,由浅至深主要为低阻的沉积层、高阻火山岩、相对低阻的蚀变带以及相对高阻的次火山岩,赋存于次火山岩体顶部穹隆状的磁铁矿主要表现为高阻特征。斑岩(沙溪)铜矿电性主体表现为块状(或纵向带状)结构,浅表为低阻沉积盖层,深部主要为相对高阻的沉积地层和高阻斑岩体,赋存于岩体内或围岩接触带的矿体则为中等电阻特征。为便于模型的实用,笔者将两类矿床的复杂电性模型转化为简化的概念电性模型,为寻找类似矿床提供快速对比"标尺"。 相似文献
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冀南邯郸-邢台地区矽卡岩铁矿的地质特征及成矿模式 总被引:6,自引:0,他引:6
冀南邯邢地区矽卡岩型铁矿主要产出于燕山期中偏碱性闪长岩-二长岩类与中奥陶统碳酸盐岩地层接触带附近。矿体形态复杂,褶皱是重要的控矿、容矿构造;矿石类型单一,主要矿物为磁铁矿。矿化蚀变具明显的分带现象,其中钠长石化是重要的找矿标志。与成矿有关的岩体往往是多期脉动形成的,早期侵入体在钠长石化过程中提供成矿物质;后期侵入体带来的岩浆热液不仅是成矿物质的载体,所产生的压应力和热能也成为成矿流体运移的驱动力。在分析此成矿过程的基础上建立了该区矽卡岩型铁矿床的成矿模式。 相似文献
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洪范池铁矿体赋存于新太古代泰山岩群山草峪组,矿体呈似层状、透镜体状。该矿矿石属于贫铁矿石,全矿区TFe平均品位31.43%,mFe平均品位为22.30%,品位比较稳定。矿区内共圈定矿体9个,其中①号矿体和②号矿体规模较大,其他皆为零星矿体,矿体形态和结构比较简单,厚度变化不大。成矿物质来源于海底火山喷发,矿床成因类型属火山沉积变质型。 相似文献
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ZANG Wenshuan WU Ganguo ZHANG D LI Jinwen ZHANG Xiangxin LIU Aihua ZHANG Zhongyi Faculty of Geosciences Resources China University of Geosciences Beijing Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 《《地质学报》英文版》2004,78(2):548-557
The Xinqiao S-Fe-Cu-Au orefield is located in the Tongling ore cluster in the middle and lower reaches of the Yangtze River in East China. There have been many researches regarding the genesis of the Xinqiao orefield in recent years, showing that it belongs to various types, such as sedimentary-reformed type, stratabound-skarn type, sedimentary submarine rocks-hosted exhalative type. We propose that it was formed in two periods of mineralization base on systematic field observation and Pb and S isotopic analyses in nearly ten years. The first period was formed during a syngenetic sedimentary process, whereas the massive sulphide orebodies are mainly related to the Yanshanian granitic magmatism. Sulfide metallic mineral associations show zoning around a granite intrusion, i.e. magnetite and pyrite→pyrite, chalcopyrite and native gold→pyrite, sphalerite and galena. Gold orebodies occur outside the contact zone of the granite intrusion. 相似文献
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繁昌桃冲铁矿成因探讨 总被引:1,自引:0,他引:1
The problems of the formation conditions for stratiform skarns and the genesis of the Taochong iron deposits are dealt with in this paper. Following is a summary of this discussion: 1. Stratiform skarns in this area occur in carbonate rocks of the Upper and Middle Carboniferous Period and the lower part of the Permian Qixia Group. No outcropping or concealed igneous bodies have ever been found, let alone any indications of an igneous contact zone or a corresponding zonality from "dry" skarn to "wet" skarn. The mineral facies and zonation of the skarns depend predominantly on the properties of the initial host rocks, and the development of skarns seems to have had much to do with chemical potential of silicon in these host rocks. As a result of the reaction of iron-bearing carbonates with siliceous materials in the rocks, iron-bearing silicates were formed, which in turn were transformed by pneumato-hydrothermal processes of the later stage. The stratiform skarns of this area, therefore, probably fall into the category of stratabound skarns subjected to transformation of thermometamorphism. 2. The iron deposits bear undisputable stratabound characteristics. The positions of ore-bearing beds and the petrological features as well as the mineral associations all point to a sedimentary ore-forming process of iron-carbonate (siderite). The presumption of siderite ore source is supported by the following facts: (l) Remnants of sedimentary siderite which survived the metamorphism have recently been observed in magnetite ore from neighbouring Xinqiao mining area. Siderite can have as many as 12.07% Fe++ and, after corrosion, shows oolitic texture. (2) The ore is mainly of calcite/ dolomite- magnetite type. Mineral associations are quite simple and sulfides are rarely seen. (3) A comparison of the analytical data suggests that the content of organic carbon in iron ore decreases due to oxidation caused by metamorphism but is still higher than that in magnetite of contact- metasomatic skarn. (4) The paleogeographic reconstruction shows that this area was once an ancient underwater uplift favorable for the precipitation of iron carbonates. After its formation, the siderate bed underwent thermodynamic metamorphism and was hence decomposed into magnetite, which was then subjected to the superimposed transformation by subsequent hydrothermal fluids, leading to the partial activation and migration of iron matter and thus the formation of such ore as hematite (specularite) at shallow depth of the Changlongshan mining area. In brief, this deposit has a complex genesis: it experienced sedimentation, thermal metamorphism and transformation by hydrothermal fluids. 相似文献
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繁昌桃冲铁矿成因探讨 总被引:3,自引:0,他引:3
桃冲铁矿,开采历史悠久,由于其品位富,以平炉富矿为主要矿石类型,受到了重视。有关矿床的成因也一直被人们所注意。自三十年代提出火成接触变质——热液成因的观点以来(谢家荣、程裕淇1935),人们习惯于将矿床划归于矽卡岩型。作者通过野外调查和初步研究之后,对本区铁矿的成因产生了疑问。本文就现有资料的分析,对层状矽卡岩的形成条件和铁矿的成因,做如下讨论。 相似文献