义敦银锡多金属矿资源集中区地质找矿探讨

对义敦银锡多金属矿资源集中区成矿地质背景、主要成矿作用进行了分析,认为该区成矿与昌多阔-哈嘎拉构造岩浆岩带形成有着必然的内在联系,不同矿床组合显示了一个较完整岩浆热液成矿亚系列;该区找矿主攻矿床类型是矽卡岩型和构造破碎热液型两大类,主攻矿种为银、锡、铅、锌、铜。根据夏塞、措莫隆等典型矿床的矿化特征、控矿条件及找矿标志,通过对区内成矿地质条件分析,提出了找矿靶区优选建议,以期实现该区地质找矿的重大突破。     

四川省木里县某金矿地质特征及找矿方向分析

矿区处于中国特提斯成矿域,西南三江构造火成岩带之义敦-中甸岛弧多金属成矿带,稻城邓波-木里菜园子Cu-Au-Pb-Zn-Ag矿远景区,周边已发现多个大中型金矿床,具有较好的找矿潜力。矿区存在多期构造,成矿物质来源较丰富,近南北向断层与背斜轴部、近东西向矿化蚀变破碎带在矿区交汇,具有较好的成矿地质条件;矿区的地球化学异常经过工程验证,共圈定金矿体8个,金矿化体7个,证实为矿致异常,其中Ⅰ号矿体规模最大,最具工业价值,矿体两端被浮土掩盖,长度大于170m,平均厚度2.25m,Au平均品位3.8×10^(-6),银平均品位50.44×10(-6),银平均品位50.44×10^(-6),铅平均品位2.59%,是一个金多金属矿体。矿区南部尚有较好的水系沉积物异常和土壤异常未进行验证,加强研究和勘查投入,有望取得较大的找矿突破。     

四川盐源磨耳哥地区铁多金属矿找矿前景分析

盐源县阿萨乡磨耳哥一带，铁、铜、铅、锌、金、银等多金属矿受地层、构造双重控制。通过对该矿集区区域成矿地质背景、含矿地层、控矿构造、矿化带特征、矿体特征、矿物组合、找矿标志等进行研究分析，认为该区成矿地质条件较好，通过进一步地质工作可望发现较大的铁多金属矿床。     

西藏当雄-嘉黎一带铜铅锌多金属矿地质特征及找矿远景

研究区大地构造位置处于冈瓦纳北缘晚古生代-中生代冈底斯-喜马拉雅构造区中段北部,雅鲁藏布江巨型铜多金属成矿带北亚带。研究区成矿地质条件有利,已发现的主要矿床类型为矽卡岩型铅锌多金属矿,其次为热液型铅银多金属矿。铜铅锌多金属矿床（点）、多金属地球化学异常均沿纳木错-嘉黎断裂带呈近东西向带状展布,该带地域优势明显,多金属矿产资源潜力巨大,通过进一步的地质找矿工作,该区有望成为西藏重要的铜铅锌银多金属成矿带。     

内蒙古宁城县杨树沟门银铜铅锌多金属矿区找矿潜力

内蒙古赤峰南部地区是中国北方一个非常重要的金属成矿区。宁城县杨树沟门银-铜-铅-锌多金属矿化区及周边晚古生代、晚中生代的岩浆侵入和岩浆期后热液活动强烈,NE向、近EW向断裂构造及受其控制的中酸性脉岩发育,围岩蚀变分布广泛,局部显示了较为明显的银、铜、铅、锌等多金属矿化,有1∶50 000及1∶10 000化探综合异常显示,1∶5000地物化综合剖面异常清晰,通过探槽工程揭露具明显的矿化显示,该区具有较好的成矿远景。     

巍山紫金山金多金属矿化区地质特征

紫金山地区存在数条长数百米、宽几十米的金多金属矿化带。近南北向或北北西向构造破碎带为成矿物质的堆积提供空间条件,上三叠统三合洞组碳酸盐岩为成矿流体的沉淀提供岩性条件。紫金山金多金属矿化区及外围具有进一步找矿前景。     

陕西柞水-山阳金铜银多金属矿集区典型矿床模型和找矿预测

柞水-山阳金铜银多金属矿集区成矿条件优越,找矿潜力较大,区内可划分出与晚侏罗世—早白垩世构造-岩浆热液活动相关的金、铜、银、铁、铅、锌、锑成矿亚系列,与晚三叠世中酸性岩浆活动相关的钼、钨成矿亚系列,与泥盆纪热水喷流沉积作用相关的碳酸盐岩容矿的铜、铁、铅、锌、银成矿亚系列等5个。归纳总结了矿集区金铜银多金属矿床找矿标志,分别建立了夏家店金矿床、池沟铜钼矿床、银洞子银铅多金属矿床、龙头沟金矿床、王家坪金矿床的综合找矿模型。通过区内综合找矿方法、找矿模型的具体运用,进行找矿预测,取得了较好的找矿进展。在圈定的夏家店和风沟-西田家沟2个找矿靶区预测金资源量42 t、银资源量450 t、铅资源量4×10⁴t。提出了研究区金铜银多金属矿床找矿预查选区、普查评价和详查勘探3个阶段不同的找矿方法技术组合,为研究区进一步的找矿工作提供了参考模型和方法依据。     

豫西熊耳山龙王庙金矿床地质特征及找矿标志

龙王庙金矿床产于熊耳山西段下峪银铅矿集中区,矿化组合为金-银-(铅),矿化类型为多金属硫化物构造蚀变岩型。通过野外地调查及对成矿地质背景、矿床地质特征、矿化阶段的研究,认为北东向构造、钾长石化和硅化以及细粒方铅矿为矿区主要找矿标志,其对该区地质找矿具有启示意义。     

豫西金矿地质特征与构造控矿探讨

豫西地区是国家重点金多金属成矿区带,成矿地质条件优越,区内金及多金属矿类型多样。通过对研究区地质特征及成矿地质条件的分析,得出区内金及多金属矿矿床形成受多重因素控制,包括地层、构造以及岩浆岩因素,并且在这些因素中,构造控矿占主导。在此基础上,将研究区内金矿矿床类型分为构造蚀变岩型金矿床、构造破碎带型金矿床、斑岩型金矿床以及爆破角砾岩筒型金矿床4种类型,并对每一种类型选取1个典型的矿床进行具体讲述。依据对研究区成矿地质特征以及5种构造控矿类型的叙述,论述了拆离-变质核杂岩构造对金矿成矿的构造控矿作用和构造控矿规律,并根据该区金矿矿床成矿规律,提出选取找矿靶区的8项依据,最后优选出7处找矿有利靶区。     

熊耳山银铅成矿区物探找矿方法应用研究

通过对铁炉坪、蒿坪沟银铅（金）矿区物探工作的研究分析，结合地质物化探工作，提出了在熊耳山寻找构造蚀变岩（破碎带）型银铅矿脉的找矿标志和工作方法。并利用两矿区的勘查验证结果，结合地物化异常标志，对两矿区外围预测区的找矿前景进行了类比分析。     

Quaternary stresses revealed by calcite twinning inversion: insights from observations in the Savonnières underground quarry (eastern France)

Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ₁ roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003).     

HYDROGEOLOGY

正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level     

METAMORPHIC PETROLOGY

正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7),     

SERIALS

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GEOPHYSICAL EXPLORATION

正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci-     

QUATERNARY GEOLOGY & GEOMORPHOLOGY

正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli-     

PETROLEUM GEOLOGY

正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.)     

GEOCHEMISTRY

正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861     

ENGINEERING GEOLOGY

正20141768 An Shaopeng(Institute of Rock and Soil Mechannics,Chinese Academy of Sciences,Wuhan 430071,China);Wei Lide Experimental Study on Mechanical Behavior of Xigeda Formation Siltstone and Structure Interface(Journal of Engineering Geology,ISSN1004-9665,CN11-3249/P,21(5),2013,p.702-708,9illus.,1 table,16 refs.)     

HISTORICAL GEOLOGY & STRATIGRAPHY

正20140985Chen Liang(Post-Doctoral Research Station of Mining Engineering,School of Nuclear Resources and Nuclear Fuel Engineering,University of South China,Heng-yang 421001,China);Huang Wei Composition of Major and Correlated Elements with Organic Matters and Paleoclimatic Implication for Lower Paleogene Sediments in Sanshui Basin