Underground radon gas concentrations related to earth tides
Underground radon gas concentrations related to earth tides
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发表时间：
1999
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通讯作者：
A. Kies;J. Majérus;N. D. D. Lantremange-N.-D.-D.-Lantremange-116646385
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作者：
A. Kies;J. Majérus;N. D. D. Lantremange-N.-D.-D.-Lantremange-116646385
几年来，在Walferdange（卢森堡）附近的一个旧石膏矿记录了氡浓度。由于该地点的特殊质量（热稳定性优于0.01 7℃/年，没有自来水，容易进入，离海洋足够远），今天该矿拥有一个地下实验室，用于地球动力学和地震学，拥有超过25台永久性仪器，可以连续记录潮汐，地震和气象参数。该矿氡浓度监测的主要目的之一是考察土潮对矿井大气中氡浓度的影响。初步结果表明，除了外界温度和大气压力外，氡浓度似乎还受到潮汐的影响。根据氡浓度的不同时间序列计算的功率谱显示了O1（月球赤纬）和M2（月球主潮）的存在。大量岩石中潮汐引起的垂直延伸的增加和重力的减小可能为氡开辟了补充通道，从而引起岩石中氡输运的增加。
Over several years, radon concentrations have been recorded in a former gypsum mine near Walferdange (Luxembourg). Because of the exceptional quality of the site (thermal stability better than 0.01 7C/year, no running water, easy access, far enough from the oceans), today the mine hosts an underground laboratory for geodynamics and seismology with more than 25 permanent instruments that continuously record earth tides, earth quakes and meteorological parameters. One of the main interests in monitoring radon concentrations in this mine was to check the ability of earth tide effects on radon concentrations in the mine atmosphere. First results show that besides outside temperature and atmospheric air pressure, radon concentrations seem to be influenced by earth tides. Power spectra, calculated for different time series of radon concentrations, show the presence of both O1 (lunar declination) and M2 (principal lunar) tides. The increase in vertical extension and the decrease in gravity induced by earth tides in the bulk of the rocks may open supplementary pathways for radon and thus induce an increase of the radon transport through the rocks.