中文摘要：

本文对贵州都匀七星洞9个滴水点进行厂为期1年的动态临测，结果显示滴水的物质组成直接源自于洞穴环境，即土壤和岩石。而大气降雨携带的物质成分较少。洞穴滴水的化学组成中元素含量变化主要由水运移过程中水-土、水-岩作用导致的岩石溶解-方解石沉淀过程所控制。QXD-1#、QXD-2#、QXD-6#、QXD-7#、QXD-8#由于水运移过程中经过的土壤较薄。水-岩作用对滴水化学特性的贡献略大。稀释作用发生在干旱条件下的QXD-2#滴水点，活塞作用在雨季对QXD-7#、QXD-9#滴水产生影响，在不同的季节，QXD-1#、QXD-3#、QXD-8#滴水点的滴率产生跳跃式变化。这些作用均受控于水的来源差异。所有这些过程对滴水点水化学产生影响但其效果较弱。滴水的Mg／Ca指示了大气降雨的变化，其值受控于洞穴顶板内水运移过程中水-土、水-岩作用下的水文地球化学过程即岩石的溶解、方解石沉淀过程及土壤物理、化学、生物学过程等。

英文摘要：

This paper deals with 9 drip points monitored for a year in Qixing cave, Duyun county of Guizhou province, China. According to the research of element geochemistry, water transporting in the cave roof influenced the sources of the substances, and the substances in drip water mainly come from the soil and rock in the roof of Qixing cave and the fewer content of elements origins from the rainfall. Variation of drip water composition is mainly controlled by processes of rock dissolution and calcite precipitation while water transporting in soil and rock. Contribution of water-rock interaction to drip water chemical composition is a bit more because the water of QXD-1 # , QXD-2 # , QXD-6# , QXD-7 # , QXD-8 # passes through a thinner soil. Dilution only happens on QXD-2 # in drought seasons, piston flow happens on QXD-7 # and QXD-9 # in rainy seasons, and jumped drip ratio happens on QXD-1# , QXD-3 # , QXD-8 # because of different water sources, but all of these processes have much weaker effects on drip chemical composition. Mg/Ca of drips implies change of rainfall, and Mg/Ca values are controlled by hydrogeochemical process of water-soil, waterrock interaction while water transports in cave roof, that is the processes of rock dissolution and calcite precipitation and of soil physics, soil chemistry, and soil biology etc.