新疆某铜矿区化探数据异常下限确定方法对比研究

本文以新疆某1∶50 000化探数据为例,运用累频法、均值标准差法、以及面积-周长(C-A)分形方法计算研究区主要成矿元素Cu异常下限值,并运用不同的异常下限值圈定了铜的地球化学异常,并对不同方法进行了对比分析,实践表明,分形法确定的异常下限更适合于本研究区。     

地理信息系统在云南元谋尹地金矿化探找矿预测中的应用

在地理信息系统支持下,通过选择合理的分析模型,结合尹地金矿区的成矿地质背景和地球化学特征,以MAPGIS为技术平台,应用规则格网模型及对未采样地区的金元素化探数据赋零等方法对化探异常数据处理与分析,展示金矿区地球化学(异常)场的空间分布结构特征,自动圈定云南元谋尹地金矿区不同级次的找矿靶区,预测矿区金矿规律,为下一步找矿方案提供科学依据.     

多维分形方法在宁镇铜多金属成矿带化探中的应用

从多维分形理论出发,利用C-A多维分形模型方法对宁镇铜多金属成矿带1∶200 000水系沉积物地球化学数据进行研究,分析区内与成矿相关元素的含量与面积双对数关系,得到元素的区域异常下限及局部异常下限,并通过与85%累计频率法及均值加2倍标准离差法对应的异常下限进行对比分析,认为研究区内C-A多维分形模型方法确定的局部异常下限及其异常范围更为合理,并体现了最小面积最大含矿率的原则,同时,还从多维分形的角度验证了研究区内成矿的多期性,并且认为Cu、Pb、Zn的成矿潜力较好,Ag次之,Au要稍差一些。     

分形方法在辽西月明山地区土壤地球化学异常确定中的应用

本文应用分形法研究了辽西月明山地区地球化学异常及其下限的确定,基于月明山地区1∶1万土壤测量数据,笔者采用分形法对该区域内地球化学金、钼元素异常进行了圈定。通过与传统方法计算出的异常下限进行比较,分形确定的异常下限更符合实际情况,同时多重分形模式可以更好的显示出元素分布特征和富集趋势。通过对元素异常的圈定,初步判断区内发现小型金、钼矿体的可能性较大,为进一步找矿指明了方向。除金、钼外,该方法还普遍适用于其他元素和地质数据,具有普遍性。     

基于分形算法的粤北地区铀元素异常划分

地球化学背景及异常的圈定是勘查地球化学应用于矿产勘查的一个重要手段.人们已经论证了地壳中元素含量在空间分布上是分形的.因此,异于以样本数据呈正态分布为假设前提的经典统计学方法,以MapGIS为平台,利用其中的"空间分析"模块,对形成了区文件的等值线图,统计不同含量的属性值,得到一个含量与面积的数据文件,运用分形理论中的含量-面积关系算法,确定地球化学元素的异常下限,进而圈定出铀矿异常区域.与传统方法相比较,其预测效果更佳.     

测氡法在地热资源勘察中的应用研究

通过对地热构造氡析出和运移规律的研究,探讨测氡法探测地热资源的机理,运用分形方法处理测氡结果,并与大地电磁测深数据相互验证,得到了隐伏断层的氡值下限和地热异常的氡值下限。结果表明:隐伏断层的构造破碎带有利于地层内氡的运移,并在地表形成氡值异常;当断层区域含有地热构造,对构造区内氡值的分形分析可以确定地热异常的氡值下限,与地热形成的氡异常相比,断层构造对地表氡值异常的形成影响更明显。     

MAPGIS地理信息系统在化探数据处理中的应用

以黄崖关银金矿区的岩石地球化学剖面测量中Ag元素化探数据为例,介绍了化探数据的特征及处理方法及在MAPGIS中如何绘制各种化探图.     

1∶10 000化探数据处理方法探讨

以候家疙瘩镍矿普查区为例,根据各种常用的确定异常下限值方法的特点,对勘查区化探数据采用盒须图法（EDA技术）以及分形法进行了分析。结果表明,盒须图法（EDA技术）圈定的地球化学异常符合客观实际,异常范围大,与已知矿化带吻合,且不需要对数据进行前期处理,操作简单,数据的分布对异常下限值影响不大。     

1∶10000化探数据处理方法探讨

以候家疙瘩镍矿普查区为例,根据各种常用的确定异常下限值方法的特点,对勘查区化探数据采用盒须图法(EDA技术)以及分形法进行了分析。结果表明,盒须图法(EDA技术)圈定的地球化学异常符合客观实际,异常范围大,与已知矿化带吻合,且不需要对数据进行前期处理,操作简单,数据的分布对异常下限值影响不大。     

地球化学元素分布特征分析在找矿中的应用——以江西省遂川县金坑金矿为例

以江西遂川金坑土壤化学采样为研究对象,对研究区内土壤中十种金属元素Au、Ag、As、Sb、Cu、Pb、Zn、W、Bi、Sn的化探数据进行了分析,运用概率统计分析,剔除特高、特低含量值,形成数据正态分布,运用MAPGIS的空间分析能力,圈定十种金属元素的异常范围,得到土壤中十种金属元素分布状况及其特征.通过主成分分析,减少了综合异常圈定的影响因素.结果发现Au、Ag、Cu、Pb、Zn等地球化学异常密集分布,这些发现将对进一步勘查提供有力的支持.     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2014 second batch of rare earth quota released

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2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586