构造地球化学-判别分析在找矿中的应用--以呼盟甲乌拉银多金属矿床为例   总被引：3，自引：0，他引：3  

赵清泉  孙传斌  荆龙华  王大平 《矿产与地质》2005,19(4):414-417

以呼盟甲乌拉银多金属矿床为例,利用构造地球化学-判别分析方法,通过对其判别标志的探讨,研究断裂构造的含矿性.此项研究对在甲乌拉地区和相邻地区找矿具有重要意义.  相似文献   

Variations of foliar carbon isotope discrimination and nutrient concentrations in Artemisia ordosica and Caragana korshinskii at the southeastern margin of China’s Tengger Desert   总被引：1，自引：0，他引：1  

Liangju Zhao  Honglang Xiao  Xiaohong Liu 《Environmental Geology》2006,50(2):285-294

Seasonal variations in foliar stable carbon isotope discrimination (Δ) of Artemisia ordosica and Caragana korshinskii and correlations of foliar Δ with N, P, and K concentrations were studied under different planting regimes at the southeastern margin of China’s Tengger Desert. Foliar Δ, N, P, and K concentrations and the correlations of Δ with N, P, and K differed between the species and planting regimes. Foliar Δ, P and K concentrations in A. ordosica were markedly higher than in C. korshinskii, while foliar N concentrations in C. korshinskii was significantly higher than in A. ordosica. There were no significant differences in N, P, and K concentrations in C. korshinskii between planting regimes, but foliar Δ was significantly increased after June in mixed-species planting. In A. ordosica foliar N concentrations in mixed-species planting and foliar Δ in single-species planting were significantly higher than those of corresponding planting regimes. According to water-use efficiency (WUE) calculated based on foliar Δ, and on N, P, and K concentrations, C. korshinskii’s survival may profit from its higher WUE, whereas A. ordosica can avoid drought damage by its higher P and K concentrations in leaves in arid or semi-arid environments. The complex correlations of foliar Δ with foliar N, P and K suggested that water in C. korshinskii and water and P nutrition in A. ordosica were the key factors limiting their growth.  相似文献   

基于GIS和聚类分析的矿井突水水源快速判别   总被引：1，自引：0，他引：1  

郑琳  孙亚军 《江苏地质》2006,30(4):299-302

基于GIS强大数据库功能和模糊聚类分析方法,建立模糊综合评判模型进行矿井突水水源快速判别,同时利用GIS可视化技术将评判结果直观地显示给用户。尝试将该系统应用于河南某矿区,结果表明该系统简便易行,评判结果切合实际,也验证了该系统的可靠性。采用该系统软件可高效准确地完成未知突水水样的水源判别,为煤矿安全生产提供决策依据。  相似文献   

Independent component analysis for UXO detection in highly cluttered environments     

Chandra S. Throckmorton  Stacy L. Tantum  Yingyi Tan  Leslie M. Collins   《Journal of Applied Geophysics》2007,61(3-4):304-317

Statistical signal processing techniques have shown progress in discriminating UXO from clutter when the objects occur in isolation. Under this condition, only a single object contributes to the measured sensor data. For multiple closely spaced subsurface objects, however, the unprocessed sensor measurement is a mixture of the responses from several objects. Consequently, the unprocessed measurements cannot be used directly to discriminate UXO from clutter. In this paper, we implement independent component analysis (ICA), a well-established blind source separation (BSS) technique, to recover the unobserved object signatures from the mixed measurement data obtained by simulating electromagnetic induction (EMI) sensor data, and then use the recovered signatures for UXO/clutter discrimination. Discrimination performance depends on multiple factors, including the number of clutter objects in proximity to the UXO, the separation distance between the UXO and clutter, and the number of mixed measurements available. Simulation results are presented illustrating the impact of these factors on discrimination performance.  相似文献   

赣中南产铀钨系列花岗岩岩石化学数值多元判别及地质效果   总被引：1，自引：0，他引：1  

李邦达 《铀矿地质》1986,(2)

由于赣中南及邻区地壳初始物质应分的不均匀性而导致的地壳重熔型花岗岩岩石化学成分和成矿元素的差异,以及U、W-Sn、TR、Nb-Ta等与壳型花岗岩有关的成矿元素地球化学性质的差异,决定了这些元素的不共生性,而各自有其成矿专属岩体。按成矿专属性可将本区燕山期花岗岩划分为产U系列花岗岩和产TR、W-Sn、Nb-Ta系列花岗岩。二系列岩体的岩石化学成分和副矿物组合有明显的差别。据此建立的岩石化学数值多元线性判别函数式能判别二系列岩体;对产W-Sn、TR、Nb-Ta系列岩体能进行二级判别,同时能判别壳源型花岗质侵出岩的产矿性,以及区分加里东期交代花岗岩及混熔过渡型Cu花岗若。  相似文献   

遥感图象的典型变换方法及其在岩性识别中的应用     

王润生 《地球科学》1987,(6)

本文简要地介绍了遥感图象的典型变换方法的数学原理,提出了建立典型变换矩阵的两种方法:(1)从野外地物反射波谱数据的典型分析求出;(2)直接从遥感数字图象的亮度值数据求出。文中还讨论了地面反射波谱的典型分析结果与多光谱遥感图象亮度值典型分析结果之间的关系,论述了将地面波谱典型分析结果用于数字遥感图象处理的可行性。简述了在101图象处理系统上实现典型变换的步骤。最后给出两个用于岩性识别的实例。  相似文献   

微波消解-电感耦合等离子体质谱法测定高岭土中10种微量元素     

李丽君  薛静 《岩矿测试》2022,(1):22-31

高岭土作为重要的铝硅酸盐,其微量元素的含量决定着高岭土产品的性能指标.高岭土的三种国家标准物质成分GBW03121、GBW03122、GBW03122a中均未含有As、Sb等10种微量元素的标准值,在高岭土的检测中只能采用近似的岩石标准物质作为监控物质,对高岭土组分的准确分析有一定影响.本文通过微波消解技术,对比了硝酸...  相似文献   

当前矿业权分类配置特征及完善措施     

赵淑芹  ;葛振华  ;艾立志 《国土资源情报》2014,(6):52-55

我国当前的矿业权配置的总体特征为:三类矿产通过两种矿业权,在两级市场上,采用两类不同的流转方式进行配置。由于三类主体的目标不一,使两类流转在两级市场上存在配置"分歧",由于分类管理依据的矿种范围模糊,影响了两类矿业权调控矿产资源开发利用总量的效果。本文认为应该按照稳定、及时、经济和生态供给标准确定国家登记颁证矿种,使矿业权成为国家调控矿产资源开发利用总量的工具。  相似文献   

分类型最优法在江苏沿江地区降水估测中的应用与讨论   总被引：1，自引：0，他引：1  

徐芬  慕熙昱  王卫芳  夏文梅  徐琪 《气象科学》2013,33(1):51-58

为提高现有天气雷达产品生成模块中处理系统算法精度、并为其他短时临近预报系统或数值预报模式提供合适的Z-I关系为目的,选择江苏沿江地区作为试验区域,采用分类型最优法建立相应的Z-I关系,并比较分类型最优法与单一Z-I关系对过程雨量和分段雨量的估测能力.结果表明:分类型最优法比单一Z-I关系法明显提高过程雨量估测的精度,梅汛期降水估测精度提高近2.5倍,夏季台风降水估测由低估72％降低至低估45％.对不同雨量段进行估测比较后发现,分类型最优法对强降水雨量段改善较为明显,对雨强＞ 10 mm/h的梅汛期对流云降水和台风降水所有雨量段的雨量估测改善明显.最后在气候统计的基础上,通过改进雷达估测降水产品色标数值等级,以达到优化雷达估测降水产品图像的显示能力.  相似文献   

模糊评判方法在矿山防治水中应用     

陆春辉  ;徐翀  ;陈永春 《地下水》2014,(3):67-69

以淮南1某矿不同含水层水及采空区水数据为例,采用模糊评判方法对突水水源进行判别分析。结果表明：在原有Na＋＋K＋,Ca2＋,Mg2＋,Cl-,SO42-,HCO3-六个评判因子基础上,增加总硬度、碱度、PH值和矿化度等作为新的评判因子,其准确率由80％提高至100％。由此表明：判别准确性与样本个数没有直接关系,仅与选取样本代表性有关,选择合适评判因子是提高模糊评判可靠性。  相似文献