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gamma field
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  “gamma field”译为未确定词的双语例句
     FURTHER STUDIES ON THE THEORY OF GAMMA FIELD IN BOREHOLE AND THE CALCULATION OF SHAPE COEFFICIENT
     钻孔伽玛场理论及形态系数计算的进一步研究
短句来源
     Using the DTM data acquired by airborne geophysical measurements and the forward relationship between radiator on the ground and the air gamma field distribution, we make forward analysis and inversion derivation for the interpretation principle of the airborne gamma energy spectrum.
     本文利用航空物探测量过程中获得的DTM数据 (达到了地形改正所需的地形起伏数据精度 ) ,应用矩形辐射体航空伽玛辐射场理论 ,根据地面辐射体与航空伽玛场分布之间的正演关系 ,对航空伽玛能谱解释方法的原理进行了正演分析和反演推导 .
短句来源
     A Reactor Neutron Counter System Using in High Gamma Field
     一个可用于高γ场下的反应堆中子计数系统
短句来源
     The theoretical basis of subdivision interpretation in total gamma logging is the theory of gamma field in borehole, which is very important in uranium exploration. Now there is only the theory of gamma field in vertical borehole.
     钻孔伽玛场理论,是总量伽玛测井中分层解释方法的理论基础,在放射性勘探中占有重要地位。
短句来源
     At the same time, the nature of gamma field in slant borehole and D function as well as the relation between D function and other gamma field functions are discussed, and then the problem on the calcula- tion of shape coefficient of slant borehole is solved.
     作者提出了斜孔一次伽玛场理论,同时对斜孔一次伽玛场性质、D函数性质及D函数与其他伽玛场函数关系做了一些讨论,进而解决了斜孔形态系数计算问题。
短句来源
  相似匹配句对
     RECENT ACHIEVEMENTS IN THE FIELD OF GAMMA-RAY BURSTS
     γ射线暴的研究概况
短句来源
     Coal Field Gamma Energy Spectrum Logger Design
     煤田γ能谱测井仪设计
短句来源
     There is reinfection in field.
     鱼腥草紫斑病在田间具多次再侵染。
短句来源
     The field of music
     论音乐的场
短句来源
     Implementation of GAMMA on PVM
     以PVM为支撑的GAMMA程序执行环境
短句来源
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  gamma field
Method for determining variations in the gamma field in the atmosphere near the earth
      
Radioluminescence and Cerenkov radiation of photomultipliers in a gamma field
      
Measurement of the gamma field created by the "sarcophagus" with the aid of a collimating spectrometer
      
The adsorbed dose rates, in mGy y-1, in air from gamma field of the natural radionuclides were calculated.
      
Based on this dwarfing pattern, the htd-1 mutant could be grouped into dn-type dwarf defined by Takeda (Gamma Field Symp 16:1, 1977).
      
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The model BP detector system for absorbed dose measurement in mixed neutron-gamma field has been constructed in our laboratory. The basic performences of the detectors have been studied. The Principal characteristics of the spherical, thimble and extrapolation ionization chambers have been given. The correction factors are all close to 1 for 15 MeV neutron field and ~(60)Co gamma-ray field. The basic parameters of the proportional counter for microdosimetry and measurement results of...

The model BP detector system for absorbed dose measurement in mixed neutron-gamma field has been constructed in our laboratory. The basic performences of the detectors have been studied. The Principal characteristics of the spherical, thimble and extrapolation ionization chambers have been given. The correction factors are all close to 1 for 15 MeV neutron field and ~(60)Co gamma-ray field. The basic parameters of the proportional counter for microdosimetry and measurement results of linear energy y spectra in mixed neutron-gamma field are shown. The monitoring system consisting of a dise-shaped TE ionization chamber and a Geiger-Muller gamma-ray dosimeter is described. The stability of The monitoriog system is given. A VFC converter is used in the electrical signal treatment system. A method which combines overlapping spectra obtained in measuring the y distribution of the mixed neutron-gamma field is dealt with.

本文介绍了自制的BP型中子、γ射线混合场吸收剂量探测器系统。对该探测器的基本性能进行了研究。给出了球形、指形外推形电离室的主要特性。对于15MeV中子场和~(60)Coγ射线场所有修正因子都接近于1。示出了微剂量测量用的正比计数管的主要参数以及在中子、γ混合场中线能y谱的测量结果。描述了由圆盘形TE电离室和GMγ射线剂量计组成的监测系统并给出此监测系统的稳定性。在电信号处理系统中使用了VFC变换器。还谈到了在中子、γ混合场中测量y分布所得各段谱的联结技术.

According to uranium regional evaluation Criteria, author carried out the digital interpretation of regional airborne gamma spectral survey and metallogenetic prognostication using the main component analysis, the gamma field of uranium related to thorium (potassium) on the regional scale, coefficient of uranium metallogenetic favorable for YW-10 and YW-10B areas. In addition, the author also comPared the results of above mentioned interpretation and prognostication with the data obtained known deposit...

According to uranium regional evaluation Criteria, author carried out the digital interpretation of regional airborne gamma spectral survey and metallogenetic prognostication using the main component analysis, the gamma field of uranium related to thorium (potassium) on the regional scale, coefficient of uranium metallogenetic favorable for YW-10 and YW-10B areas. In addition, the author also comPared the results of above mentioned interpretation and prognostication with the data obtained known deposit No. 660 and studied the variation of gamma spectral Parameters in the area of approximately 270km in length and 50—70km in width. The research results has been proved that it is useful for understanding the distribution of primary uranium, the geochemical process of uranium in the later stage, for evaluating the uranium content from source rocK in the metallogenetic and diagenetic stages, and for distinguishing the favorable area of uranium ore formation.

本文以“铀矿区域评价准则”为依据,试用因子分析主成分比值法,铀对钍(钾)的区域相对场法和铀成矿有利指数法,对我国YW-10和YW-10B两个测区的区域航空γ能谱场进行了地球化学解释及预测方法的研究,与已知矿区660测区从宏观上做了对比分析,并研究了γ能谱参数在走向长270km,宽50—70km空间上的分布变化规律。研究结果表明,这些方法对了解成岩时原始铀的分布及后期铀的地球化学活动规律,估计成岩、成矿阶段铀源岩可能提供的生铀量,识别铀成矿有利地区是有用的。

With the development of uranium exploration work, exposed or nearsurface uranium deposits easily discovered are decreasing in number. In order to increase tbe efficiency of the mineral exploration, and reduce prospecting targets, this paper analyses the geophysical and geochemical characteristics of china's main uranium deposits and districts and the relationship of formation mechanism with uranium mineralization and also discusses and summarizes the geophysical and geochemical models for deep buried uranium...

With the development of uranium exploration work, exposed or nearsurface uranium deposits easily discovered are decreasing in number. In order to increase tbe efficiency of the mineral exploration, and reduce prospecting targets, this paper analyses the geophysical and geochemical characteristics of china's main uranium deposits and districts and the relationship of formation mechanism with uranium mineralization and also discusses and summarizes the geophysical and geochemical models for deep buried uranium deposits in China on the basis of many-year practical experiences and uranium geological data. 1. Regional geophysical characteristics of uranium deposits in China 1) Up to now, almost all the uranium deposits (and occurrences) found in China are regionally located in radioactive gamma fields with high values or higher values and their margins that show the very close relationship between uranium deposits and gamma highs. 2) According to the studies on the gravity data from uranium deposits (occurrences), most of uranium deposits (occurrences) are distributed at the margins of gravity highs or on transitional zones from gravity highs to gravity lows, i.e. on gravity gradient belts at every level. It indicates that uranium deposits are related to the intersections between tectonic structure elemen s with different densities or the transitional belts of deep faults, uplifts and depressions. 3) Many uranium deposits (occurrences) occur in the areas with low and stable magnetic fields (within±100nT) or near the margins of regional magnetic anomalies and deformational parts. It indicates that uraninm deposits are correlated with weak magnetic geological bodies (including secondary tectonic fracture zone). 4) From satellite images, many uranium deposits (occurrences) can be seen to distribute in the concentrated areas of colour lineaments and the margins of colour rings or development portions of grating colour lineaments in them. It reflects that uranium deposits are associalted with structure-magmatism-rift zones and magmatism-hydrothermal activities centers. 2. Geophysical-geochemical characteristics of uranium districts (fields) in China 1) It is found that several large uranium districts (fields) in China are located in potassium-high zones through studies of high-sensitive airborne gamma spectrometric data. Therefore, potassium-high zones may become the important promising areas for future exploration of deep-buried uranium deposits, which may be related to the existence of potassium-rich granitic rocks. 2) Mobilized uranium concentration in geological bodies of uraniferous areas is high. The mobilized uranium concentration in granites and volcanic rocks of uranium producing areas in China is relatively high and uranium mobilization and migration rate is over 50—80%. It shows that the formation of uranium deposits is closely related with the mobilization, migration and enrichment of uranium element in uranium-rich geological bodies. 3) The dispersion of uranium concentration in uranium-producing geological bodies is high and the wider the dispersion the greater the possibility of uranium accumulation is. 4) Th/U ratio in geological bodies of uranium areas is small, usually less than 3. Except the areas with mixed U-Th and high Th, when average uranium concentration is higher than regional background uranium concentration, the areas with Th/U ratio less than 3 are the favourable areas for deep-buried uranium deposits (The smaller the Th/U ratio, the nearer the area to uraniferous areas is). 5) U, Ra, Rn, He in water are high near uranium deposits. 6) There are generally some weak anomalies on the surface of blind ore bodies but under unfavourable conditions no indications are shown. Since no data have directly confirmed the relationship between surface anomalies and subsurface orebodies, the comprehensive-analysis of the above anomalies and charaoteristics is necessary to determine whether subsurface concealed uranium deposits exist or not. 3. Geophysical and geochemical models for subsurface uranium deposits In the geological bodies with radioactive gamma highs or their margins, uranium concentration is distributed dispersively, high mobilized uranium, small Th/U ratio, high potassium, slighthy high U, Ra, Rn, He in water nearby appear and weak anomalies exist at the surface. And such geological bodies regionally occur at gravity gradient zones and low-stable magnetic field areas. The intersection and overlapping of lineaments and ring structures shown on satellite images implies that buried uranium deposits may occur at depth.

为进一步提高物化探方法找深部铀矿的效果,解决当前找深部铀矿中的一些地质问题,本文研究和分析了我国大部分铀矿床、区的地球物理平口地球化学特征及其可能反映的成矿、赋矿地质条件,据此探讨了找深部铀矿的地球物理-地球化学模式:伽码场高或偏高,铀含量分布离散度大,活化铀量高,钍铀比值小,钾高,附近水中铀、镭、氡、氦偏高,地表有微弱的放射性和非放射性异常,区域上处于重力梯度带和低稳磁场区以及遥感图像上的线性和环形“色线”发育、交汇叠加区的地质体,其深部很可能有隐伏铀矿存在。

 
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