【摘要】 本文对河北平原深层高氟地下水进行了研究,发现地下水中的氟含量与锶同位素组成(8δ7Sr)在水文地球化学性质上有3个相似点和一个明显的差异:①87Sr和F-有相同的矿物来源,例如黑云母、角闪石等,这可能是一个普遍的规律;②河北平原深层地下水的8δ7Sr值和其中的F-含量具有相似的分布规律,高值区都分布在子牙河附近及其以东的地区;③87Sr/86Sr比值(或8δ7Sr)与F-含量呈明显的正相关关系,都是水-岩作用"时间积累效应"的结果。二者的差异在于最大值的分布区不一致:8δ7Sr最大值分布区在子牙河一带,而F-含量最大值的分布区在吴桥-东光-沧州一带。本研究在一定程度上揭示了锶同位素对研究高氟地下水的形成机理、分布规律和生态效应的良好示踪作用。更多还原

【Abstract】 This paper studied deep groundwater of F-high content in Hebei Plain,and found that there are three similarities and a difference on relations between F-content and strontium isotopes composition,according to the study on Sr and F on geochemistry and hydrological geochemistry and δ87Sr /δ86Sr ratio of groundwater in Hebei Plain.(1)F-and 87Sr have the same sources,such as biotite and hornblende,which may be a universal phenomena;(2)δ87Sr value,and F-concentration have similar distribution that higher F-concentration(> 1.0 m/L) and higher δ87Sr value are both in the vicinity of Ziya River and the eastern area;(3)δ87Sr/δ86Sr radio is positively correlated with F-content in groundwater,reflecting the result of "time-accumulation" of water-rock inter-reaction.However,the maximum distribution area is not consistent.The δ87Sr maximum distributes around the Ziya River while the maximum distribution of F-is mainly in the region of Wuqiao-Dongguang-Cangzhou.The study revealed to a certain extent that strontium isotope plays a good tracer role to study the formation mechanism distribution and ecological effects of groundwater with high F-content.更多还原