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基于GIS技术的地质矿产空间数据库综合分析了青海南部"三江"北段斑岩型钼铜矿床成矿条件,建立了区域斑岩型钼铜矿床的资源预测模型,并提取了相关成矿预测因子,采用分级证据权法对成矿预测因子进行了赋值,圈定了区域有利成矿远景区,对区域矿产资源潜力进行了定量预测。研究表明,与斑岩型钼铜矿有关的矿床预测权重包括地层、岩浆岩、构造以及矿化异常等及其相关的定量化分析因子;依据后验概率值将研究区划分两个成矿远景区:纳日贡玛-东莫扎抓成矿远景区(Ⅰ)、阿多-结多成矿远景区(Ⅱ)。在两个成矿远景区内又可划分出A类铜钼矿有利靶区5处、B类铜钼矿有利靶区4处、C类铜钼矿有利靶区4处;利用丰度模型法估算青海"三江"北段区域内铜资源量为7 412 730 t,钼资源量为8 566 180 t。 相似文献
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西藏雅鲁藏布江成矿区斑岩型铜矿基本特征与找矿潜力 总被引：27，自引：9，他引：18
雅鲁藏布江成矿区位于青藏高原腹地,地质工作程度极低,但成矿条件十分有利.近年来中国地质调查局在该成矿区部署开展"十五"期间重点实施项目"雅鲁藏布江成矿区铜多金属资源调查评价",通过几年的工作,在斑岩铜矿资源评价方面取得了重要进展,目前已初步控制了4个大型远景的斑岩型铜矿床,新提出了一批可供进行预查或普查的新矿产地,初步揭示出该成矿区铜矿资源的巨大潜力,中国西部又一大型铜矿产资源基地的前景在西藏已经初步显现. 相似文献
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多宝山—黑河地区位于大兴安岭成矿省北东段,区内已探明的金、铜等20多个矿种的资源储量居黑龙江首位,其中斑岩型铜矿为区内重点勘查资源,其赋存于侵入铜山组砂砾岩和多宝山组安山岩的花岗斑岩和花岗闪长岩中,蚀变明显,主要受地层和北东、北西向断裂控制。充分收集并总结前人的研究成果,对研究区的区域地质背景、矿床地质特征、成矿类型、控矿要素、物化遥异常等信息进行综合,建立多宝山式铜矿找矿预测模型。基于该预测模型,采用证据权法分析并圈定8个斑岩型铜矿成矿远景区,可作为研究区进一步勘探找矿工作的重点。 相似文献
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中国铜矿成矿规律概要 总被引：9，自引：0，他引：9
中国铜矿资源丰富.本文在对全国814处铜矿床及其他5000余个矿(化)点资料系统梳理的基础上,完善了对中国铜矿产预测类型的划分方案,分为10个类型,认为斑岩型、矽卡岩型应该作为重点预测类型;其中又以斑岩型铜矿资源最主要,集中分布于冈底斯、昌都-三江、德兴、东天山等地区;成矿时代以新生代和中生代最为重要.系统搜集了全国范围内有关铜矿床的成矿年代学资料,划分为4个铜的主要成矿期;厘定出27个以铜为主的矿床成矿系列,提升了我国铜矿成矿规律研究的程度,为我国铜矿资源的潜力评价预测工作提供了理论依据. 相似文献
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不同斑岩铜矿的构造地质、成矿时代和控矿因素具有其特殊性, 所以需要针对具体的矿区开展地质调查以获取矿区标志性蚀变矿物组合信息, 从而利用遥感技术手段提取矿区蚀变信息, 确定找矿远景区.通过综合分析秘鲁南部斑岩铜矿地质特征、控矿因素, 确立了以泥化-绢英岩化和青磐岩化组合蚀变矿物带为遥感找矿指示标志, 并以ASTER数据为遥感数据源开展蚀变矿物信息提取技术研究, 结合已有矿区地质资料、高光谱影像和实地勘查结果, 验证了典型蚀变带矿物信息提取结果的可靠性, 另圈定了2处找矿远景区.在综合分析、梳理已有研究基础上, 构建了多光谱遥感找矿模式, 并在智利、阿根廷等其他多个斑岩铜矿区取得了较好的应用效果. 相似文献
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A probabilistic mineral resource assessment of metal resources in undiscovered porphyry copper deposits of the Ural Mountains in Russia and Kazakhstan was done using a quantitative form of mineral resource assessment. Permissive tracts were delineated on the basis of mapped and inferred subsurface distributions of igneous rocks assigned to tectonic zones that include magmatic arcs where the occurrence of porphyry copper deposits within 1 km of the Earth's surface are possible. These permissive tracts outline four north-south trending volcano-plutonic belts in major structural zones of the Urals. From west to east, these include permissive lithologies for porphyry copper deposits associated with Paleozoic subduction-related island-arc complexes preserved in the Tagil and Magnitogorsk arcs, Paleozoic island-arc fragments and associated tonalite-granodiorite intrusions in the East Uralian zone, and Carboniferous continental-margin arcs developed on the Kazakh craton in the Transuralian zone. The tracts range from about 50,000 to 130,000 km2 in area. The Urals host 8 known porphyry copper deposits with total identified resources of about 6.4 million metric tons of copper, at least 20 additional porphyry copper prospect areas, and numerous copper-bearing skarns and copper occurrences.Probabilistic estimates predict a mean of 22 undiscovered porphyry copper deposits within the four permissive tracts delineated in the Urals. Combining estimates with established grade and tonnage models predicts a mean of 82 million metric tons of undiscovered copper. Application of an economic filter suggests that about half of that amount could be economically recoverable based on assumed depth distributions, availability of infrastructure, recovery rates, current metals prices, and investment environment. 相似文献
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中国萤石矿预测评价模型与资源潜力分析 总被引：2，自引：0，他引：2
中国萤石矿资源较丰富,探明资源量居世界前列。我国的萤石矿研究工作主要围绕大中型萤石矿床的地质特征、物质来源、成因、区域成矿规律和少数省级萤石矿成矿远景区划、区域萤石矿资源潜力评价展开。为摸清萤石矿资源家底,制定科学合理的经济产业政策,亟需开展系统的、全国性的萤石矿成矿规律和资源潜力评价。依据中国萤石矿资源潜力评价报告数据和成果,文章分析了中国萤石矿矿床类型、矿床地质特征和时空分布特征,划分了成矿区带;在各省区建立的典型矿床预测模型和区域预测模型基础上,以成矿系列理论为指导,突出总结萤石矿成矿要素和预测要素,归纳、汇总、提出了热液充填型和沉积改造型萤石矿矿床预测评价模型;以各省区圈定的最小预测区、归并的2级预测区和估算的资源量为基础,依据预测要素和区域预测模型,归并、圈定了198个3级预测区,汇总估算了全国萤石矿预测资源量,提出了中国萤石矿预测远景区。中国萤石矿资源丰富,找矿潜力大,预测资源量（CaF2）约9.5亿t,其中单一萤石矿预测资源量约4.3亿t,以热液充填型预测资源量为主。预测远景区主要分布于中国东部,四子王旗、冀北-辽西、豫南、皖南-浙西、浙中、闽北-粤东等地区成矿条件好,资源潜力大,是萤石矿预测资源量较大的地区。 相似文献
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基于GIS技术的三江北段铜多金属成矿预测与评价 总被引：5，自引：0，他引：5
基于地质、地球物理、地球化学和遥感等多元地学信息的成矿预测与评价,能够优选和圈定成矿远景区,并为区域矿产资源量的估算提供依据,是国内外定量地学研究的重点和热点之一。文中选取西南三江北段为研究区,针对研究区铜多金属矿床具有海拔高、坡度大、近地表出露和矿区剥蚀环境发育等特征,在以往国内外学者普遍认同的控矿因素进行区域预测与评价的基础上,结合区域矿床的变化和保存条件研究内容,提出兼顾区域控矿、变化-改造、保存因素的成矿预测评价新认识。为了检验新认识,文中根据研究区成矿地质背景和已查明的24个铜多金属矿床,利用GIS技术提取铜多金属矿床赋存相关的29种多元信息,选取了证据权重法,开展基于控矿因素的20个因子和基于控矿、变化-改造和保存因素的29个因子两种区域铜多金属成矿预测与评价,编制成矿后验概率图,结合已知矿点和野外验证分析,认为基于控矿、变化-改造、保存因素的成矿预测结果优于单一的控矿因素预测结果:一方面剔除了冰川、水蚀或风化等近地表营力作用产生的非成矿异常区,另一方面提取了近地表赋存矿体的地层和岩体相关的成矿远景区。 相似文献
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Allen L. Clark 《Mathematical Geology》1977,9(3):221-233
The ever-increasing world interdependency required to provide the basic energy and mineral commodities needed by society, has created a need to assess, on a common basis, the location, number, and quality of deposits of natural resources. In order to evaluate and compare the resource potential of any area, two major factors must be considered: (1) the type of commodity being evaluated and (2) the specific parameter (reserves or resources) which is being defined. Each commodity or parameter being studied requires a separate methodology for analysis and different basic data. Porphyry copper deposits must be treated differently from stratabound copper deposits or massive sulfide deposits of copper. Similarly, oil and gas deposits associated with stratigraphic traps must be treated differently from those associated with salt domes. Resource assessments attempt to estimate the aggregate resource potential of an area whereas resource analyses attempt to define the specific characteristics of the individual occurrences which comprise the aggregate resource potential. Assessment programs may range from a national inventory of known deposits and occurrences to detailed studies which require an extensive integration of geological, geochemical, and geophysical data. Examples of national inventories are the small mine inventory of Bolivia and presently operating resource programs in Turkey and Argentina. Detailed programs of assessment include the AMRAP (Alaska Mineral Resource Appraisal Program) program and studies in the Coeur d'Alene district and Ely, Nevada. Worldwide resource analysis is a rapidly expanding field of endeavor necessitated by the need to more clearly define the characteristics of known deposits and to provide quantitative estimates of hypothetical and speculative resources. Studies presently underway deal with the development of search and occurrence models, field size distributions of energy resources, tonnage and grade relationships of mineral deposits, the zone of influence of exploratory drill holes, and models of the exploration process.This paper was presented at the International Geological Correlation Program (IGCP) Project 98 entitled Standards for Computer Applications in Resource Studies held at Loen, Norway, September 27–October 1, 1976. 相似文献
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中国钨矿成矿地质特征与资源潜力分析 总被引：2，自引：0，他引：2
钨矿是中国传统优势矿种,前人在钨矿成矿理论方面积累了非常丰富的研究成果。然而,随着近年来在江西、云南和新疆等地取得的多项钨矿重大找矿突破,对原有的钨成矿带地质认识提出了挑战,急需进一步分析和总结其地质特征、成矿规律和资源潜力,为今后地质找矿工作提供理论指导。文中采用矿床模型综合地质信息预测方法,在各省区钨矿资源潜力预测成果的基础上,以MapGIS为平台,进行数据库汇总与综合分析研究。首先,基于全国1 538处钨矿产地数据的统计分析,初步总结了中国钨矿时空分布特征,以及岩浆岩、构造和地层等控矿因素。其次,根据钨矿床及预测区的空间分布和大地构造单元,划分了56个钨矿成矿区带。再次,将钨矿的预测类型划分为石英脉型、夕卡岩型、斑岩型、云英岩型、陆相火山岩型、沉积变质型、层控夕卡岩型和砂矿型,并建立了主要钨矿类型的预测模型。最后,在全国范围累计圈定的1 357个最小预测,累计预测资源量(WO3)2 973×104 t。根据钨矿区域成矿特征,将最小预测区归并为461个二级预测区,并进一步合并为118个钨矿三级预测区,其中,找矿潜力大的河南卢氏-栾川、新疆白干湖、湖南香花岭-瑶岗仙、甘肃野马滩-干巴河脑、江西坪背山-八仙脑和大湖塘等6个三级预测区可优先部署钨矿勘查工作。 相似文献
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This study used regional geochemical survey data (1:200,000 scale) from the Manzouli area of China to assess mineral resources. Geochemical survey data was rasterized and a geochemical atlas was generated, with the image pixel size determined according to geochemical exploration sample point spacing. The Wunugetushan, Babayi, and Badaguan porphyry copper deposits were selected as model areas for the assessment of copper mineral resources. Three parameters were considered for the calculation of the mineral resources. An ore-bearing hydrothermal alteration coefficient was determined based on geological characteristics and geochemical characteristics of the model area, in order to determine alteration intensity; a denudation coefficient was calculated to determine denudation extent; and a mineralization intensity coefficient was calculated to determine the intensity of mineralization within each pixel. Resource estimation was conducted through regression analysis of model deposit resources and coefficients. The results can be used to determine prospecting target areas based on frequency classification and can be used to estimate the number of ore deposits. Results show that resource estimation using rasterized geochemical data provides high prediction precision and accurate positioning. 相似文献
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近年来经济的快速发展导致铅锌矿产资源需求大量增加,使得我国的铅锌资源储备形势依然严峻。基于此,在全国开展铅锌矿产资源潜力评价工作,通过总结铅锌矿地质矿产成果,掌握铅锌矿产资源现状,预测未查明的铅锌矿产资源潜力,能够更好地满足未来铅锌矿产资源规划部署及合理利用的需要。在系统梳理全国29个省级行政单位铅锌矿产资源潜力评价成果的基础上,总结中国铅锌矿时空分布规律特征,结合传统的矿床模型以及全国重要矿产预测类型划分方案划分了铅锌矿矿产预测类型,将全国铅锌矿划分为9类矿产预测类型,分别是层控碳酸盐岩型（MVT）、碳酸盐岩细碎屑岩型（SEDEX）、砂砾岩型、沉积改造型、陆相火山岩型、海相火山岩型、岩浆热液型、夕卡岩型和风化壳型;分析了重要成矿区带的铅锌矿矿产预测类型、成矿时代,总结了各成矿区带主要类型铅锌矿区域预测要素,建立了主要类型铅锌矿区域预测模型。结合全国大地构造相图、全国成矿区带图以及全国各级预测区分布图等资料,划分了15个铅锌矿成矿省和47个Ⅲ级成矿区带,以成矿省(成矿区带)为主线开展矿产资源潜力评价和预测工作,为勘查部署提供依据。 相似文献