泉州四至井水氡异常及中国台湾东南部(包括附近海域)地震的对应关系

对泉州四至井2006年1月至2008年12月水氡观测数据进行分析与处理,依据2倍中误差、短期阶升突跳、短期和中长期趋势异常等多种判别法,对其水氡异常进行判别。结果表明:泉州四至井水氡氡值基本保持春夏高、秋冬低的弓形年变化动态图像,出现的水氡异常对中国台湾东南部及附近海域有较好的对应关系,并对2006年7月28日花莲6.0级、2006年12月26日恒春7.2级、2007年9月7日台东6.3级地震进行案例分析,有关研究结果对寻求泉州四至井水氡异常对中国台湾地区某些敏感对应点的映震能力具有一定的现实意义。     

氡气测量法-高密度电法在断层定位中的应用

主要论述了氡气测量法与高密度电法相结合的综合物探方法在断层定位中的应用。通过已知断层在同一岩性、不同岩性的试验结果,同地质剖面对比分析,说明两种物探方法对断层定位是可行的。最后,将试验结果应用到工程地质推断断层,取得了较为理想的效果。     

Extraction of internal wave amplitude from nautical X-Band radar observations

One of the most important parameters for oceanic internal waves (IWs) is their amplitude. We have developed a method to retrieve the IW amplitude from nautical X-Band radar images based on the KdV equation for continuous stratified finite depth system. We have also tested the method of measuring the amplitude of IWs from X-Band radar backscatter image sequences acquired on June 2009 in the northeastern South China Sea. The method was applied in several radar images. Experiments show that the retrieval amplitudes are consistent with the in-situ observational amplitudes of IWs by using the towed thermistor chain and conductivity-temperature-depth (CTD) profile. The uncertainty of the method is also discussed.     

两种斜缆采集正演模拟及虚反射压制效果分析

斜缆采集是近些年发展起来的海上采集技术,主要为了压制虚反射,获得高品质的宽频地震资料。线形斜缆和弧形斜缆是目前最常用的斜缆类型,能够获取较多的高低频信息。针对这两种斜缆采集方式,通过对比不同采集参数的地震记录及其消除虚反射后的数据,发现弧形斜缆采集观测系统明显优于线形斜缆,不仅在波场模拟中表现出较好的特征,而且在虚反射消除的过程中,引入了较小的噪声,能够获得较高信噪比的地震资料。分析模型测试的结果,证明海上地震勘探中更适合采用弧形斜缆。      

气氡观测中的恒流鼓泡式脱气-集气装置研制与应用

利用20 cm不锈钢高压锅作为集气室,在锅的两边上、下分别打一个进出水孔,用15 mm不锈钢管道件连接,把进水口制作成高于锅内液面,出水口与锅内液面为同一水平面,形成一高一低,一小一大两个相对稳定的动态水平液面,在进水管中引入气泵输出气体,使集气室内进水同时进行自动连续鼓泡,把水中气体脱出,在输气管中接入玻璃转子流量计控制气体流量,进行恒流鼓泡。并应用于小流量冷水井气氡观测,效果显著。     

Indoor radon mapping and its relation to geology in Hungary

Indoor radon mapping may show stronger dependence on geological formations if the measured homes are one-storied houses with no basement. In Hungary, 17,244 homes were investigated on the yearly average of indoor radon concentrations; among these homes, there were 6,154, one-storied, no-basement houses. In Hungary, 21 geological units were created relevant for indoor radon index characterized by lithology, the position of the ground water table, and the gas permeability. Maps were drawn of different topography (counties, grid, geological units) and different values (maximum, mean, indoor radon indexes). A kind of standardization of houses was that only the one-storied, no-basement ones were chosen, but from geological point of view some more information was gained when the wall materials (bricks or adobe) were also taken into account. (“Adobe” is made of clay and straw in Hungary, and not burned as brick, just dried on sunshine). Enhanced indoor radon values can be observed on the bedrock of Cenozoic volcanic rocks and their eroded materials deposited on the local alluvial valleys. Another group with relatively increased indoor radon values can be connected to granite bodies. The grid method is useful for covering large state or even continental areas. For practical public use and detailed radon risk mapping geological or administrative unit-systems could yield more reasonable and useful results.     

氦气的天然气地质意义

氦气具有的不易液化、稳定性好、扩散性强等特点,使它既能在天然气藏中富集,又能垂向运移至地表。氦有大气氦、壳源氦和幔源氦3种来源。3He主要来源于地幔;4He主要来源于地壳,通常以R/Ra来表示氦的来源。氦气具有丰富的天然气地质意义：地表氦气浓度异常有一定油气指示意义;氦气的同位素分布特征值（R/Ra）还具有指示油气构造环境、指示断裂带及旁证CO2气藏的成因等地质意义。     

某铀矿山退役分矿环境放射性现状调查

文章介绍了对我国南方某铀矿山退役分矿环境放射性现状的调查与研究。结果表明：在所有监测项目中,完全退役的1号分矿治理完全达标;而属于政策性停产的2号分矿,某些监测点空气中氡浓度、γ辐射和水体放射性水平均超过国家限值。此外,两个分矿土壤中天然放射性核索的含量都比对照点高。     

青岛市氡的环境地质调查初探

本文从青岛花岗岩岩性、放射性元素、构造特征、空气氡和土壤氡浓度定量测定,取得了青岛市区32km²土壤氡环境地质调查成果,得出青岛市环境氡为低水平城市的结论。