喀斯特洞穴滴水Ca、Mg离子特征与降雨、温度相关研究——以贵州安顺石将军洞为例

Relevant research on Ca^(2+),Mg^(2+) characteristics,precipitation and temperature of drips in karstic cave:A case study of Shi Jiangjun Cave in Anshun,Guizhou Province

为了分析洞穴滴水Ca^(2+)、Mg^(2+)和降雨、气温内在联系、进一步帮助解译周围地区地表环境,我们从2011年6月至2012年5月对贵州石将军洞滴水Ca^(2+)、Mg^(2+)等地球化学特征和周围气候进行了为期一年的监测,发现7个滴水点Ca^(2+)、Mg^(2+)年际变化趋势具有明显一致性,分为波动区、高值区及低值区,滴水点Mg/Ca比值与月降雨量没有明显一致性变化,但波动区、高值区及低值区均值与月降雨量具有很好的相关性,能够反应外界降雨量变化。并且研究发现,在低值区由于温度和土壤CO_2的影响,造成滴水Ca^(2+)、Mg^(2+)在1月份突变性降低,成为年际变化的波谷期。

In order to analyze the interior relation between karstic cave drips＇ positive ion （Ca^2＋ and Mg^2＋） and climatic conditions （precipitation and temperature）, and to further contribute to the interpretation of the ground-surface environment around the survey region, we had done one-year monitoring to the cave drips＇ Ca^2＋, Mg^2＋, and other geochemical characteristics, there were also the climatic conditions around the area from June 2011 to May 2012 in Shi Jiangjun Cave of Guizhou Province. The main discovery we have got are as follows： the interannual variation trends among seven chosen drip points＇ Ca^2＋ and Mg^2＋ are obviously consistent, they are divided into fluctuation area, high value area and low value area. There is no remarkable consistency between the Mg/Ca ratio and the precipitation on their variations by the month. However, the average Mg/Ca ratios among fluctuation area, high value area and low area are capable of responding the precipitation from the outside for they are well correlated with the monthly precipitation. We have also developed that the drips＇ Ca^2＋ and Mg^2＋ values reduce abruptly in the low value area in January （as the trough period of the interannual variation） for the impact of temperature and soil CO2.