运用放射性方法探测活断层   总被引：4，自引：0，他引：4  

马翔  田原 《物探化探计算技术》1996,(S5)

水文地质工程地质勘查中 ,活断层的存在与否 ,是比选水利工程地质地址和采取工程措施、确定水力模型的重要依据。目前都是采用地质分析方法来确定活断层的。放射性方法的运用 ,为地质分析法提供了一种极有力的手段。本文从实用角度论述了活断层的放射性地球物理特征、探测活断层的判断依据和应用效果  相似文献   

青岛市氡的环境地质调查初探   总被引：2，自引：0，他引：2  

陈昌礼  刘庆成  孙小林 《物探与化探》1997,21(4):293-299

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。  相似文献   

H—90Bγ能谱比活度仪   总被引：2，自引：0，他引：2  

梁树红  张彪  韩耀照 《铀矿地质》2001,17(3):174-175,167

H－90Bγ能谱比活度仪是一种便携式微机数字化的四道微分γ能谱比活度测量仪器。具有自动稳谱，自动定时测量功能。既可自动计算钾、铀、钍含量，又可用于现场快速检测石材、建材和工业废渣中天然放射性核素^226Ra、^232Th、^40K的比活度，并可区分A、B、C3类建材产品。  相似文献   

Radionuclides and sulfur content in Mount Etna plume in 1983–1995: new constraints on the magma feeding system     

M. F. Le Cloarec  M. Pennisi 《Journal of Volcanology and Geothermal Research》2001,108(1-4)

Radionuclide activities (²¹⁰Pb, ²¹⁰Bi, ²¹⁰Po) were investigated in Mount Etna plume from 1983 to 1995. At SE crater the long-term observation (12 years) of the ²¹⁰Po/²¹⁰Pb ratio shows that it can behave as a degassing vent not directly related to the main magma reservoir depending on the magma level inside the volcano. Since 1992, the simultaneous determination of radionuclides and sulfur in the main plume results in new constraints on the degassing model of Lambert et al. (Earth Planet. Sci. Lett., 76 (1986) 185). The ²¹⁰Po/SO₂ and ²¹⁰Pb/SO₂ ratios enable us to identify two sources of ²¹⁰Po in the plume: one is magmatic, correlated with SO₂, the other one is an additional component issued from the decay of ²¹⁰Pb in the shallow degassing cell, and depends directly on the residence time of the gases before their emission. Estimations of the volume of degassing magma, the residence time of the gases and the proportion of undegassed magma renewing the shallow degassing cell are given for the period 1992–1995. During the 1992 eruption, the rate of degassing magma volume is estimated to have been as high as 5×10⁶ m³/day, and the volume of the shallow degassing magma reservoir about 0.5 km³. In 1994 and 1995 the rate of non-erupted degassing magma volume was estimated to have been about 0.18 km³/year. During the entire 1983–1995 period, only 15–20% of the degassed magma was erupted.  相似文献   

试谈花岗石石材的放射性   总被引：1，自引：0，他引：1  

张松森 《福建地质》2002,21(4):221-225

通过常见花岗石石材岩石矿物特征的论述，介绍了不同的岩石化学成分和矿物组成对花岗石石材放射性强度的影响。指出选用饰面石材时，灰色系列和暗色系列放射性值低较为安全，对于浅色系列需要分别对待，使用前进行放射性活度检测是必要的。  相似文献   

Using cosmogenic beryllium–7 as a tracer in sediment budget investigations     

W. H. Blake  D. E. Walling  & Q. He 《Geografiska Annaler: Series A, Physical Geography》2002,84(2):89-102

Recent advances in the use of the environmental radionuclides caesium–137 and unsupported lead–210 to quantify medium– and longer–term rates of erosion and sediment accumulation have proved of considerable value in catchment sediment budget investigations. However, there remains a need to explore the potential for using other shorter–lived radionuclides to provide evidence of sediment mobilisation, transport and storage over shorter timescales and particularly for individual events. This contribution reports the results of a study aimed at exploring the potential for using beryllium–7 (⁷Be, t _½= 53.3 days) to meet this requirement. The study investigated the use of ⁷Be as a sediment tracer in three key components of the sediment budget, namely, soil erosion and sediment mobilisation from slopes, the transport, storage and remobilisation of fine sediment in river channels and overbank deposition on river floodplains. The results presented clearly demonstrate the potential for using ⁷Be to obtain information on short–term and event–based sediment redistribution rates for use in catchment sediment budget investigations.  相似文献   

地面伽玛能谱测量在任丘油田南部地区的应用     

戴丽君  王平 《吉林大学学报(地球科学版)》1991,(2)

根据地面伽玛能谱测量在任丘油田南部的实测资料,经综合分析表明:①伽玛能谱测量的结果符合众所周知的放射性方法找油模式;②化探结果证实了能谱测量资料;⑨能谱测量的低值区范围与已知油田在本区的面积重合率达75％。从而证实了地面伽玛能谱测量在本区寻找油气藏的效果。  相似文献   

东北地区煤田地质环境放射性综合评价方法研究     

刘强  金洪涛  朱巍  田辉  张森  鞠楠  张妍  闫晓明 《地质与资源》1992,29(4):388-396

  相似文献   

航空物探的技术现状及其应用   总被引：5，自引：1，他引：5       下载免费PDF全文

线纪安 《地质找矿论丛》2003,18(Z1):191-195

文章介绍了冶金航空物探工作情况;综述了国内外航空物探技术现状及当前应用范围.  相似文献   

航空放射性测量在环境检测中的应用   总被引：3，自引：4，他引：3  

李怀渊 《物探与化探》2004,28(6):515-517

通过对铁、煤开发利用中形成的放射性热点的成功航空检测,以及对中国辐射照射量率图的分析,确定了几个放射性水平偏高区域,从而阐明了航空放射性测量在环境检测中的作用.最后分析了放射性照射对人体健康的影响,指出了今后开展大面积航空放射性检测的必要性.  相似文献