Deposition rates and element features of active sediments under drip water in Furong cave of Chongqing
HUANG Chun-xia
LI Ting-yong
HAN Li-yin
LI Jun-yun
YUAN Na
WANG Hai-bo
ZHANG Tao-tao
ZHAO Xin
Abstract：To explore the variation,control mechanism and environmental significance of deposition rates and elements in the recent sediments under drip water in the Furong cave,Chongqing,five drip sites were moni-tored continuously from November 2010 to November 2013,and recent sediments were collected for the dep-osition rate calculation and determination of trace elements.The results show distinct correlations among the deposition rates and the discharges of drip water,pH,Ca concentration,PCO 2 of the five drip sites.The deposition rates of MP4 and MP5 are both positively correlated with their discharges of drip water (r=0.75, n=1 1,p<0.01;r=0.63,n=1 1,p<0.05,respectively),and the deposition rates of the two drip sites ex-hibit obvious variations,high in rainy seasons while low in dry seasons.The deposition of MP4 and MP5 oc-cur mainly in rainy seasons.The changes of their deposition rates can indicate the dry and humid changes of the outside environment.The annual precipitation increased during 2012-2013.Under the influence of dilu-tion effect,water-rock interaction and different absorptions of plants for elements,the concentration of Mg decreased while the Sr concentration increased.At the same time,the Mg/Ca is negatively correlated with the Sr/Ca.They can respond to the increasing of the precipitation on the interannual time scale.
Keywords：active sedimentdeposition ratetrace elementprecipitationFurong cave
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 238-246 )