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山东省莱州市招贤金矿区矿体特征与找矿前景 总被引：1，自引：0，他引：1
近年来,焦家金成矿带深部找矿取得重大突破。山东省地质调查院在莱州招贤地区,对焦家带深部(赋存标高-1 260m~-2 170m)开展找矿工作,圈定金矿体27个。矿体受焦家断裂的破碎蚀变岩带控制,主要赋存于黄铁绢英岩化碎裂岩及花岗质碎裂岩带内,其中规模达第Ⅰ勘查类型的矿体3个。提交金矿(333+334?)金金属量105t,另有低品位金金属量近50t。该文对焦家带深部金矿体矿体特征、赋存情况等进行研究,发现矿区内主矿体向深部尚未封闭,尤其是72~88线、288~320线,矿体向深部有厚度变大,品位增高的趋势,且在320线深部矿体中发现了自然金,显示了焦家成矿带深部具有良好的找矿远景,为打造胶东深部找矿示范区提供重要参考。 相似文献
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栖霞笏山-西陡崖金矿位于蓬莱-栖霞金成矿带南侧,是产于新太古代变质基底与中生代燕山期花岗岩接触带附近的破碎蚀变岩型金矿。本次研究在矿区外围开展了详细的野外地质调查,并对该矿床进行了详细研究,在Ⅰ号主矿体深部施工DKZK03钻孔,控制金矿体4层,累计真厚度6.85m。其中,Ⅰ-1、Ⅰ-2号金矿体埋深分别为1273.80～1275.45m、1072.95～1076.55m,Ⅰ-1号金矿体为该区目前最深金矿体。采用趋势外推法对区内深部金矿体进行定位预测,为今后在栖霞地区金矿深部找矿勘查提供了依据,该地区金矿深部具有较大的找矿潜力。 相似文献
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招平断裂带是胶东地区最重要的金成矿带之一,通过近几年的勘查,其中段和北段陆续发现数个大型、超大型金矿床,而南段勘查活动较少,有找矿突破的矿区更是屈指可数。位于招平断裂带最南端的山旺矿区在山东省地质六队的勘查下取得新进展,探获金矿资源量规模达到中型,探矿深度达到1 342 m,矿体最大埋深接近1 000 m。矿体主要分布于断裂带下盘,呈似层状、脉状产出,矿化类型中浅部以石英脉型为主,深部渐变为蚀变岩型。该文阐述矿床地质特征,总结成矿因素,分析成矿远景,为下一步在招平断裂带南段研究和勘查提供参考。 相似文献
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纱岭金矿床位于焦家断裂中南段,属于典型的焦家式金矿床,探获金资源量约389.2t,目前是国内平均勘查深度最大的金矿床。为进一步探讨纱岭金矿床深部成矿潜力,该文在野外地质工作的基础上,选取钻孔岩心样品,采用构造叠加晕研究方法,重点研究Ⅰ-2号主矿体地球化学特征、原生晕分带特征,建立构造叠加晕模型并进行深部找矿预测。研究结果表明:矿床的前缘晕指示元素为As-Sb-Hg,近矿晕指示元素为Au-Ag-Cu-Pb-Zn,尾晕指示元素为Bi-Mo-W-Sn;Ⅰ-2号主矿体构造叠加晕出现"反分带"现象,表明纱岭金矿床具有多期成矿成晕特征;在矿体尾部存在前缘晕与尾晕共存叠加现象,指示深部有良好的找矿前景,预测矿体侧伏方向深部(-1600m之下)有盲矿存在,预测靶位标高为-1600m～-2000m。 相似文献
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由山东省地矿局第三地质大队承担勘查的烟台市牟平邓格庄金矿资源接替找矿项目,在其深部和外围发现并探明中型金矿,新增金资源储量12．6t,老矿山可延长服务期24年,稳定职工就业干余人。根据全国危机矿山接替资源勘查规范要求和矿区地质特点,山东省地矿局第三地质大队在勘查过程中,以综合研究为先导,以深部找矿为重点,采取综合技术手段,克服矿体埋藏深、产状陡立、施工难度大等困难,累计完成钻探进尺25000m,坑探560m。 相似文献
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为加强招平断裂带深部找矿,总结提出"胶西北三大断裂赋矿深度对称、矿体规模对称"的找矿新思路,在招平断裂水旺庄矿区进行验证,取得突破。并首次制作跨四探矿权的5 000 m地质剖面图,研究、指导水旺庄深部找矿,将招平断裂勘查深度从-1 500 m延伸至-2 200 m以上,新增金资源量110 t,使招平断裂带提交金资源量达到1080 t,成为千吨级控矿断裂,其中2号主矿体,新增资源量近90 t,其资源量增加至120余吨,单矿体达到特大型金矿的规模。根据最新研究成果,发现招平断裂北段九曲蒋家208断裂和破头青断裂相互叠加影响形成千米级巨厚蚀变带,按蚀变程度由浅至深划分为5层,其中浅部一、二层由破头青断裂控制,中间第三层由破头青和九曲蒋家208断裂共同控制,深部四、五层由九曲蒋家208断裂控制,厚大矿体即赋存于第四层绢英岩化花岗质碎裂岩带内。新思路、新方法的应用极大提高了工程部署合理性,二期详查钻孔见矿率达到100%,取得重大找矿成果,呈现了招平断裂北段深部轨迹。确定九曲蒋家208断裂为招平断裂北段深部找矿的主要目标。 相似文献
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招平断裂金成矿带是胶西北著名的金成矿带,以前该断裂带中南段转弯处为空白区,除物探工作外,未开展任何地质勘查工作。近年来随着勘查不断深入,在留仙庄地区南北侧已知矿床的深部,累计新增金金属量180 t。2015—2016年,留仙庄矿区利用钻探和物探地质手段取得突破。笔者通过收集邻区地质资料,利用矿区内最新施工钻孔及物探资料,对区内矿体成矿规律、展布特征及招平断裂带转弯处物探特征进行全面、系统分析。研究发现,矿区南部Ⅰ-1号主矿体富集、产出规律明显,赋存岩性为黄铁绢英岩化花岗质碎裂岩,矿体侧伏角40°,富集体沿侧伏方向呈等间距分布,主矿体深部未封闭;通过可控源音频大地电磁测深推断,招平断裂带呈舒缓波状,具有铲式构造特征,与钻孔揭露构造带特征相符,推断断裂带可靠性强。CSAMT和SIP电阻率特征吻合较好,2号异常明显,物探异常可信度高。认为该区具有较好的找矿前景,对招平断裂带中南段深部探矿具有一定的指导意义。 相似文献
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马家疃金矿区位于胶东著名的台前-陡崖金成矿带上盘,笏山、西陡崖金矿床东邻。笏山、西陡崖矿区已累计提交金资源储量30余吨,其主矿体倾向深部,向马家疃矿区延伸稳定。区内地层出露单一,岩浆岩发育,矿体产出于玲珑花岗岩体中,严格受NNE向压扭性断裂控制,矿石类型主要为黄铁绢英岩化碎裂岩。通过对矿床地质特征及矿床成因的分析,其深部有较大的找矿前景,在总结成矿规律的基础上,围绕有利构造部位进一步勘查,有望实现栖霞地区找矿的再次突破。 相似文献
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Based on the hydrographic data in austral summer during the 22nd Antarctic Expedition of China(2005/2006),some features can be found about the northern margin of Emery ice shelf as follows.The heat content in the surface layer(0-50 m) at the eastern end and the western end of the ice-shelf margin is much higher than that at the middle.The upper mixing-layer depth and the seasonal thermocline depth at the middle of the ice-shelf northern margin are much shallower than those at the both ends.However there is much less difference between the middle and the ends in the bottom layer.The remote sensing photos show that the inhomogeneity in the surface-layer water is closely related to the spatial distribution of the floes and polynia in the area. 相似文献
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Phylogenetic analysis based on 16S rDNA of 8 strains of cultivable bacteria isolated from Arctic sea-ice was studied.The results showed that strain BJ1 belonged to genus Planococcus,which was a genus of low mole percent G C gram-positive bacteria;strain BJ6 belonged to genus Burkholderia of β-proteobacteria and the rest 6 strain all belonged to γ-proteobacteria,of which strain BJ8 was a species of Pseudoalteromonas,strain BJ2-BJ5 and BJ7 were members of genus Psychrobacter.Phylogenetic analysis also indicated that bacteria of genus Psychrobacter of the isolates formed a relatively independent phylogenetic cluster in comparison with other bacteria belonged to genus Psychrobacter. 相似文献
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《极地研究(英文版)》2014,(3)
正1 Aims and Scope Advances in Polar Science(APS)is an international,peer-reviewed journal jointly sponsored by the Polar Research Institute of China and the Chinese Arctic and Antarctic Administration.APS is a comprchensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose is to publish achievements in fundamental research,applied 相似文献
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《山地科学学报》2014,(4):I0004-I0009
<正>AIMS AND SCOPE(Editorial Policy)The Journal of Mountain Science(JMS)is devoted to mountains and their surrounding lowlands-ecoregions of particular global importance,with a particular emphasis on the important highlands/mountains in the world,such as the Tibetan Plateau,the Himalayas,the Alps,the Andes,the Rockies and many other mountain ranges of our planet. 相似文献
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《山地科学学报》2014,(4)
<正>The Journal of Mountain Science(JMS),founded in2004,is an international English-language journal on mountain sciences.JMS is supervised by the Chinese Academy of Sciences(CAS),sponsored by the Chengdu Institute of Mountain Hazards and Environment,CAS,published by Science Press China,and distributed by Springer exclusively throughout the world(excluding Mainland China).The JMS is published bimonthly,fulltexted in SpringerLink and CNKI,indexed/abstracted by 相似文献
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Livestock behaviour in the Pyrenees includes free grazing and a long resting period that provokes the accumulation of dung and urine in some places,so-called camping areas. The aims of this study were （i） to analyze any change in floral composition,and in nutritional and chemical contents of plants in a livestock camping area; and （ii） to relate the floral composition with soil chemical properties. In a linear transect,five sampling zones were established,from the centre of the camping area to the surrounding Nardus stricta-dominant pasture. The above ground plant biomass and the topsoil were sampled in each zone with 6 replicates per zone. Plant species were classified and weighed to calculate above ground biomass,nutritional and chemical contents,and Shannon diversity and evenness indices. Additionally,soils were sampled in two periods,at the beginning and at the end of grazing period. Soil available nutrients （nitrate,ammonium,phosphorus,potassium,calcium and magnesium）,total nitrogen,organic carbon and pH were measured.
Plant chemical contents （protein,lignin and others） were significantly related to the proportions of grasses,legumes and other plants; so,the protein content is positively correlated with legumes plant biomass while lignin content is negatively correlated with grasses. Both plant and soil nutrients increased linearly towards the centre of the camping area. However,the relationship among plant species richness,diversity and evenness relative to its position along the studied transect was bell-shaped. From the outskirts to the centre of the camping area,plants with low nutrient demand were progressively replaced by those with medium and high nutrients demand and by pioneers.
Nardus stricta-dominant pasture has low plant diversity and plant nutrient content as well as a poor soil nutrient availability. The presence of the camping area introduced patches with more soil nutrients and new species in the large spatial scale. However at a small spatial scale,the strong soil nutrien 相似文献
Plant chemical contents （protein,lignin and others） were significantly related to the proportions of grasses,legumes and other plants; so,the protein content is positively correlated with legumes plant biomass while lignin content is negatively correlated with grasses. Both plant and soil nutrients increased linearly towards the centre of the camping area. However,the relationship among plant species richness,diversity and evenness relative to its position along the studied transect was bell-shaped. From the outskirts to the centre of the camping area,plants with low nutrient demand were progressively replaced by those with medium and high nutrients demand and by pioneers.
Nardus stricta-dominant pasture has low plant diversity and plant nutrient content as well as a poor soil nutrient availability. The presence of the camping area introduced patches with more soil nutrients and new species in the large spatial scale. However at a small spatial scale,the strong soil nutrien 相似文献
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文章概略介绍了利用卫星进行定位的原理 ;由卫星信号传播、信号接收和SA政策等引起的理论误差 ;给出了多种快速、高精度定位的工作模式和观测点选择的原则 ;列出了将WGS - 84坐标转换为我国坐标的公式及解算参数的具体方法 ,供读者在GPS工作中参考。 相似文献