中文摘要：

为揭示金华北山洞穴滴水的地球化学变化及环境指示意义,以金华北山溶洞群中的双龙洞和二仙洞为 研究对象,选取了 5处滴水点,对其电导率,PH 值及HCO3- ,SO24- ,Cl- ,Ca2＋和 Mg2＋浓度从2014年 1 月-2015 年4月进行了连续监测.结果显示：1）洞穴滴水的地球化学性质受到洞穴顶板厚度、水的运移路径和降水等因素 的影响,常年性滴水点各离子平均浓度较季节性滴水点大;2）金华北山洞穴滴水地球化学性质与气温和降水密 切相关,而 pH值,SO24- 浓度与降水呈现一定的负相关关系,Ca2 ＋和 Mg2 ＋浓度呈现出雨季低旱季高的特点,在雨 季随着降水量的增加而增大;3）雨季降水的稀释作用影响滴水中Ca2＋和 Mg2＋浓度的变化,旱季降水在岩溶裂 隙中滞留时间影响Ca2 ＋和 Mg2＋浓度,降水是影响Ca2＋和 Mg2 ＋浓度的主要因素;4）ρ（Mg）/ρ （Ca）对降水有一定 指示意义,但也受气温的影响, ρ （ Mg）/ρ （ Ca）能否作为环境变化的替代性指标需要进一步加强研究.

英文摘要：

In order to know the drip water geochemistry changes and its environmental implications, it was se-lected Shuanglong Cave and Erxian Cave as the study, subjects five locaions drip of water were selected, and electrical conductivity, pH, HCO3- , SO4- , Cl- , Ca2 ＋ and Mg2＋ concentration were monitored from January 2014 - April 2015, the results showed that; 1 ）The geochemical nature of drip affected cave roof thickness, water migration path and precipitation, the average concentration of each ion showed that perennial drip point was higher than the seasonal water point; 2） Geochemistry of drip water closely related to temperature and pre-cipitation , HCO3 ＂tration and conductivity positively correlated with precipitation, but pH, SO42- , Ca2 ＋ and Mg2 ＋ concentrations showed some negative correlation with precipitation; 3 ） The concentrations of Ca2 ＋ and Mg2 ＋ affected by dilution of precipitation, in dry season precipitation residence time in the karst fissures Ca2 ＋ and Mg2＋ concentrations affected by residence time in the karst fissures of precipitation, precipitation was the main factor affecting of Ca2＋ and Mg2＋ concentration; 4 ）ρ（ Mg）/ρ（ Ca） ratio of cave water implicated the out-side wet or dry, but also effected by temperature, the ratio of ρ （ Mg ）/ρ （ C a ） could be taken as the indicators of environmental change need further strengthen research.