井中磁测资料预处理与弱信号识别     

王赛昕  刘天佑  欧洋 《物探与化探》2014,(1):90-95

井中磁测仪器距离场源近,磁测资料受到钻孔打穿磁性体产生的内磁场影响,往往存在强干扰压制有用信号,因此研究井中磁测资料预处理与弱信号识别方法具有重要意义。笔者将地面重磁资料边界识别中倾斜角总水平导数和解析信号振幅方法改进后应用于井中磁测资料预处理中,提出倾斜角垂向导数和均值归一解析信号振幅方法。通过模型分析证明了两种方法都可识别强弱不同的井旁磁性体位置,反映边界信息,且给出了计算均值归一解析信号振幅过程中窗口选择的依据。将两种方法应用于江苏某工区ZK002孔磁测资料预处理中,得出倾斜角垂向导数方法应用于实测资料中会放大干扰,而均值归一解析信号振幅方法增强了该钻孔弱异常信息,且压制了干扰信号,处理结果与磁化率测井和钻孔资料相对应。  相似文献   

异常结构三维综合系统的开发和应用     

高艳芳  弓秋丽 《物探与化探》2014,(2):402-407

地球化学异常结构三维综合系统的开发和应用是为了满足地球化学多维异常体系的研究而逐步展开的。应用于深部找矿预测的多维异常结构方法,从钻孔岩芯直接采样,获得了具有真三维属性的地球化学数据,研究者迫切需要在三维场景下对所获三维地球化学数据进行解读和表达。异常结构三维综合系统(3D-MDAS)是利用三维可视化和地质体三维建模技术,在MapGIS K9平台上进行二次开发获得的。本系统实现了地上、地下数据模型的一体化显示,实现了实体模型与属性模型的耦合一体化显示,在此基础上还可以对异常结构进行空间分析,建立三维地球化学找矿模型。笔者详细阐述了三维异常结构3D综合系统的三维建模思路和技术,并用安徽马头矿区的实际应用成果给以说明。  相似文献   

玲珑金矿大开头矿区Bi特征及指示意义     

胡宝群  高海东  申玉科  郭涛  吕古贤  武际春 《物探与化探》2014,(6)

在金矿床中,金、铋常常相伴产出,在金矿体周围存在明显的铋异常,它可作为重要的指示元素。笔者研究了玲珑金矿不同岩石中铋与金含量之间的关系,比较了基岩地球化学剖面中两元素的相关性,采用电子探针分析了主要矿石矿物中铋和金的含量,发现不同类型岩石中铋含量差异明显,铋在矿体中含量远高于围岩,在矿区中铋与金呈幂函数正相关,铋原生晕规模大、衬度高,与金都是以独立矿物相形式存在。在玲珑金矿化探找矿中,铋含量高,与金呈较好的正相关关系,是最佳指示元素之一。  相似文献   

Arsenic Distribution Pattern in Different Sources of Drinking Water and their Geological Background in Guanzhong Basin,Shaanxi, China     

LUO Kunli  ZHANG Shixi  TIAN Yuan  GAO Xing 《《地质学报》英文版》2014,88(3):984-994

To study arsenic(As) content and distribution patterns as well as the genesis of different kinds of water, especially the different sources of drinking water in Guanzhong Basin, Shaanxi province, China, 139 water samples were collected at 62 sampling points from wells of different depths, from hot springs, and rivers. The As content of these samples was measured by the intermittent flowhydride generation atomic fluorescence spectrometry method(HG-AFS). The As concentrations in the drinking water in Guanzhong Basin vary greatly(0.00–68.08 μg/L), and the As concentration of groundwater in southern Guanzhong Basin is different from that in the northern Guanzhong Basin. Even within the same location in southern Guanzhong Basin, the As concentrations at different depths vary greatly. As concentration of groundwater from the shallow wells(50 m deep, 0.56–3.87 μg/L) is much lower than from deep wells(110–360 m deep, 19.34–62.91 μg/L), whereas As concentration in water of any depth in northern Guanzhong Basin is 10 μg/L. Southern Guanzhong Basin is a newly discovered high-As groundwater area in China. The high-As groundwater is mainly distributed in areas between the Qinling Mountains and Weihe River; it has only been found at depths ranging from 110 to 360 m in confined aquifers, which store water in the Lishi and Wucheng Loess(Lower and Middle Pleistocene) in the southern Guanzhong Basin. As concentration of hot spring water is 6.47–11.94 μg/L; that of geothermal water between 1000 and 1500 m deep is 43.68–68.08 μg/L. The high-As well water at depths from 110 to 360 m in southern Guanzhong Basin has a very low fluorine(F) value, which is generally 0.10 mg/L. Otherwise, the hot springs of Lintong and Tangyu and the geothermal water in southern Guanzhong Basin have very high F values(8.07–14.96 mg/L). The results indicate that highAs groundwater in depths from 110 to 360 m is unlikely to have a direct relationship with the geothermal water in the same area. As concentration of all reservoirs and rivers(both contaminated and uncontaminated) in the Guanzhong Basin is 10 μg/L. This shows that pollution in the surface water is not the source of the high-As in the southern Guanzhong Basin. The partition boundaries of the high- and low-As groundwater area corresponds to the partition boundaries of the tectonic units in the Guanzhong Basin. This probably indicates that the high-As groundwater areas can be correlated to their geological underpinning and structural framework. In southern Guanzhong Basin, the main sources of drinking water for villages and small towns today are wells between 110–360 m deep. All of their As contents exceed the limit of the Chinese National Standard and the International Standard(10 μg/L) and so local residents should use other sources of clean water that are 50 m deep, instead of deep groundwater(110 to 360 m) for their drinking water supply.  相似文献   

Lithium Ion Extraction from the High Ration Mg/Li Salt Lake Brine with Ionic Liquid in Triisobutyl Phosphate and Kerosene     

GAO Daolin  LIU Mingming  GUO Yafei  YU Xiaoping  WANG Shiqiang  DENG Tianlong 《《地质学报》英文版》2014,88(Z1):315-316

正1 Introduction As the lightest metal with the unique properties of energy production and storage,lithium is regarded as the new century energy metal.Lithium and its compounds were widely used in various industrial fields,especially in  相似文献   

Preparation of Silver Nanoparticles Film and the Adsorption of Iodide     

GAO Can  HU Yaoqiang  ZHANG Huifang  YE Xiushen  LI Quan  LIU Haining  WU Zhijian 《《地质学报》英文版》2014,88(Z1):313-314

正Iodine and iodine compounds are widely applied in medicaments,dyes,energy materials,food additives etc.The development and utilization of iodine resources have attracted much attention.A large amount of iodide is  相似文献   

Phase Equilibrium and Phase Diagram of the Ternary System(MgCl_2 + MgB_2O_4 + H_2O) at 288 and 298 K     

GUO Yafei  SUN Shiru  GAO Diaolin  YU Xiaoping  WANG Shiqiang  DENG Tianlong 《《地质学报》英文版》2014,88(Z1):326-327

正1 Introduction The brines with high concentrations of magnesium and boron resources are widely distributed in the Qaidam Basin of the Qinghai-Tibet plateau,China(ZhengTang,1988).Although some works on the ternary system  相似文献   

Studies on the Thermodynamics and Thermal Chemistry Properties for Lithium Salts and Their Aqueous Solution Systems     

LI Long  GAO Daolin  GUO Yafei  DENG Tianlong 《《地质学报》英文版》2014,88(Z1):345-346

正1 Introduction With the industrial development of lithium battery,nuclear and aerospace industry,the demands of metal lithium and its compounds are increasing significantly.Lithium is called as the energy of the metal in the new century(Zhang et al.2001).The total reserve of lithium resources around the world7  相似文献   

Provenance and Paleogeography of the Late Cretaceous Mengyejing Formation,Simao Basin,Southeastern Tibetan Plateau     

WANG Licheng  LIU Chenglin  GAO Xiang  ZHANG Hua 《《地质学报》英文版》2014,88(Z1):255-256

正The Mengyejing potash salt deposit(MPSD)is the only pre-Quaternary potash salt deposit in China.The MPSD is located in the southern Simao Basin,southeastern Tibetan Plateau.The MPSD,along with rock salts and clastic rocks,  相似文献   

Transformation Process and Mechanism of Lithium Borates     

CAO Lin  LIU Mingming  GAO Daolin  GUO Yafei  DENG Tianlong 《《地质学报》英文版》2014,88(Z1):127-127

正Amounts of lithium-containing salt lake brine resources are widely distributed in the four provinces named Qinghai,Tibet,Inner Mongolia and Xinjiang province,especially the salt lakes in Qinghai-Tibet Plateau are abundant of  相似文献