In order to explore the spatiotemporal variations and indicative significance of δD and δ18O in drip water from Ma'huang Ca-ve,this study systematically monitored and analyzed four drip points within the primary branch of the Shuanghe Cave system.The mo-nitored points were catagorized into two Class Ⅰ(low-flow)and two Class Ⅱ(high-flow)types.The findings are as follows:(1)Drip water δD and δ18O values exhibit a pattern of higher values in the dry season and lower values in the rainy season.(2)Drip points with low flow rates show smaller variations in δ18O and ions,indicating a lesser response to external climatic conditions;among the high-flow points,there are distinctions between percolation flow and vadose zone flow—drip points of percolation flow exhibit minimal re-sponse to external climate,suggesting a stable groundwater recharge,whereas drip points of vadose zone flow show the highest correla-tion between δ18O values and temperature/precipitation,effectively reflecting climatic changes.This study aims to detail the spatiotem-poral variations of δD and δ18O in Ma'huang Cave drip water along with their hydrochemical characteristics,which could prove useful in providing a reference basis for paleoclimate reconstruction from cave sediments.
cave drip waterhydrogen and oxygen stable isotopesclimate indicatorshydrochemistry
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