| Institute of Karst Geology, Chinese Academy of Geological Sciences | Host |
| Citation: |
HUANG Chun-xia, LI Ting-yong, HAN Li-yin, LI Jun-yun, YUAN Na, WANG Hai-bo, ZHANG Tao-tao, ZHAO Xin. Deposition rates and element features of active sediments under drip water in Furong cave of Chongqing[J]. Carsologica Sinica, 2015, (3): 238-246. doi: 10.11932/karst20150306
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Deposition rates and element features of active sediments under drip water in Furong cave of Chongqing
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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 sediment /
- deposition rate /
- trace element /
- precipitation /
- Furong cave
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HUANG Chun-xia, LI Ting-yong, HAN Li-yin, LI Jun-yun, YUAN Na, WANG Hai-bo, ZHANG Tao-tao, ZHAO Xin. Deposition rates and element features of active sediments under drip water in Furong cave of Chongqing[J]. Carsologica Sinica, 2015, (3): 238-246. doi: 10.11932/karst20150306
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