【摘要】 氘过量参数是由Dansgaard提出的一个新概念,它被定义为:d=δD-8δ18O。河北平原地下水氘过量参数有三个特征:(1)地下热水的氢和氧同位素组成显示出热交换的态势,d值随地下水年龄增大而减少。(2)在同一地区,d值随着地下水埋深加大而增大。(3)在同一含水层内,沿着地下水的路径,从补给区到承压区,d值随着地下水年龄增大而增大。我们认为,d值虽然是地下水年龄的函数,但最好和3H、3H-3He、14C、36Cl和4He测年结果结合使用。更多还原

【Abstract】 Deuterium excess parameter （d） is a new conception proposed by Dansgaard. The d value is determined by d=δD-8δ¹⁸O. The deuterium excess parameter of groundwater in Hebei plain has three characteristics:（1） Hydrogen and oxygen isotopes in the thermal groundwater appear to the tendency or situation of thermal exchange. And the d value decreases with the age of the groundwater. （2） The d value increases with the depth of the groundwater in the same region. （3） The d value increases with the age of the groundwater in same aquifer from recharge area to confined area along the path of water flow. We consider that despite d value is the function of groundwater’s age, but it is necessary to use together with the dating methods by　³H、³H—³He.¹⁴C、³⁶Cl.更多还原