弱透水层(Aquitards)是渗透性很差的岩石层,现在正被考虑用作有毒废料的长期地下储存库。因此,从地质学的时间尺度上确定这些岩石层防止渗漏的性能是非常重要的。用氦同位素作为地球化学示踪剂所做的一项研究,对法国东巴黎盆地弱透水层上下两个含水层的地下水的长期流动性进行 Aquitards, a very impermeable layer of rock, are now being considered as long-term underground storage for toxic waste. Therefore, it is very important to determine the performance of these rock layers to prevent leakage from the geological time scale. A study using helium isotopes as geochemical tracers conducted on long-term groundwater flows in both aquifers above and below the aquitard in the French East Paris basin