Characteristics and environmental significance of isotopes record from cave drip water and recent deposit in Naduo cave,Guizhou
MAO Qingya
WANG Jianli
WANG Jialu
LI Wen
Abstract：To explore the cave drip water and the variation characteristics of its corresponding oxygen iso-topes in modern deposits and their significance to the climatic environment,the atmospheric precipitation outside the Naduo cave in Guizhou,cave pool water,six drip points and their corresponding modern deposits oxygen stable isotopes have been monitored for the past 2 years.The results show that the δ18 O in atmos-pheric precipitation,drip water,and deposits of Naduo cave are generally lower than those in most other southern regions.However,the seasonal variation ofδ18 O from all three sources is significant.For example, theδ18 O in atmospheric precipitation outside Naduo cave and in cave pool water both have seasonal character-istics that are higher in the dry season and lower in the wet season,and can basically reflect the climate change in the area where the cave is located.Though theδ18 O in deposits and drip water have similar season-al variation,they show a very different pattern from theδ18 O in the atmospheric precipitation.This may be the result of the combination of regional topography,karst surface zone regulation,and atmospheric circula-tion.
Keywords：atmospheric precipitationcave drip watermodern depositsOxygen stable isotopesNaduo cave
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 265-271 )