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对可供地浸法开采的５１２铀矿床镭－氡放射性平衡规律进行初步研究表明，在对该矿床钻孔施工过程中，由于泥浆压力的存在，使镭－氡放射性平衡遭到破坏，严重地降低了伽玛测井的伽玛照射量率，使按伽玛测并确定的储量计算参数不准确。为此，作者对这一平衡破坏规律进行了初步研究，确定了储量计算参数的镭一氡平衡破坏修正值，既消除了伽玛测井的影响因素，又增加了２０％的远景储量。建议在今后对该矿床进一步工作时，对该平衡破坏规律采用岩芯取样为主，同时辅以适量的专门物探参数观测孔进行验证的研究方案。 相似文献
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放射性平衡系数是表征铀矿床物理特性的重要参数。γ强度测量法实质上是探测铀的衰变产物氡子体的γ强度,通过它间接测铀。这只有当铀镭处于放射平衡状态时才是正确的。若铀镭的平铀状态遭到破坏,用γ法测量不加修正就不能准确地确定铀含量。因此,铀镭平衡系数及其变化规律的研究对于铀矿普查和勘探工作都有着重要的意义。 相似文献
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张锦由 《华东地质学院学报》1984,(2)
铀镭平衡系数是描述铀系中铀镭平衡状态的一个参数。它不仅关系到铀矿床储量计算的可靠性,而且关系到寻找铀矿床的某些找矿方法的应用效果。因此有必要对它作进一步的探讨。铀镭平衡系数可由下式计算: 相似文献
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从分析在砂岩型铀矿中镭氡平衡破坏的原因出发,探讨了镭氡平衡系数的计算方法,并对不同的计算方法进行了讨论。该系数的取得,为十红滩铀矿床北带放射性测井数据的修正、矿体边界的划分、铀矿资源量的计算提供了科学依据。 相似文献
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Ivan V. BRAGIN Georgy A. CHELNOKOV Oleg V. CHUDAEV Natalia A. KHARITONOVA Sergey V. VYSOTSKIY 《《地质学报》英文版》2016,90(1):276-284
Studied waters belong to warm(T=30-50℃),alkaline(pH=8.9-9.3),low mineralized(TDS235 mg/1)Na-HCO_3 or Na-SO_4-HCO_3 thermal waters with high content of SiO_2(up to 81 mg/l)and F(up to 3.9 mg/1),occur on modern volcano-tectonic rejuvenated areas of Eastern Sikhote-Alin orogenic belt.Low~3He concentration as well as N_2/O_2 and N_2/Ar ratios exclude influence of deep mantle fluid.New rare earth element data constrain our understandmg of water-rock interaction occurring in the water source region.Meteoric origin of waters is proved by stable isotope values varying from-71‰to-136.1‰and from-10.8‰to-18.8‰forδ~2U andδ~(18)O respectively.REE patterns reflect high pH,resultfing from water-rock interaction and oxidative conditions.Calculations of deep aquifer temperature using Na-K and quartz geothermometers show 116.8-131.1°C and 82.2-125.8℃respectively.Presence of deep faults both with abnormal thermal gradient(~45-50 K/km)define unique geochemical shape of thermal waters of Sikhote-Alin,area,where no present volcanic activity is registered. 相似文献
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土压缩模量预测回归分析方法 总被引：1，自引：0，他引：1
在土压缩模量Es的分析计算中,常用的分析方法是根据土的e-p曲线试验资料建立公式求解,本文引入了数学上的回归分析方法来探讨Es与其它各项物理力学指标参数之间的相关关系,旨在找出对Es影响最显著的指标参数,并建立最优回归方程式,以此来预测Es。研究结果表明:该方法通用性强,应用范围广,亦可推广应用于其它相关领域。 相似文献
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Using the database of automatic hydrometeorological stations, installed in the Don RIver delta and Taganrog Bay seashore, the sources of the anomalois scale water negative surge and salinization of the Azov Sea under conditions of low river flow in 2015–2016 are studied. The new schemes of stratification and advection of salty sea waters in the Don River mouth under different weather conditions, water discharge and levels are given. 相似文献
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Doklady Earth Sciences - Multiannual observations (2009–2017) by means of autonomous seiche recorders have been conducted for marine seiches with one second discreteness in the boot basin for... 相似文献
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《International Geology Review》2012,54(10):1218-1225
Copper deposits of Cuba belong to the Jurassic lead-zinc-copper, Cretaceous copper and Paleogene copper complexes, which differ substantially in their formation conditions. The island is differentiated into a number of metallogenic zones formed at the initial and early stages of the Cuba folded province. Pinar del Rio, Pinos, Trinidad and Oriente zones, of an intrageanticlinal nature, are prospective with respect to copper vein deposits of the lead-Zinc-copper complex. The Sasa and Cauto zones - intrageosynclinal - are prospective with regard to copper-pyrite and copper vein deposits of the Cretaceous complex. A metallogenic study of the island is indicated in planning the exploration of its copper prospects. -- AGI Staff. 相似文献