岩溶关键带微量元素运移的时空变化:以豫西鸡冠洞为例
发布时间：2019-07-09 11:57
【摘要】：为探索岩溶关键带元素运移时空变化特征及过程,自2009年10月至2015年5月对我国北方典型岩溶关键带——河南西部鸡冠洞相互作用带中各组分(大气降水、土壤、基岩、洞穴滴水、洞穴现代沉积物)进行了连续定点监测及取样分析,共获得650个实验数据.对比了Ca、Mg、Ba、Sr、δ~(13)C及元素比值在不同组分中的变化情况及运移规律.结果表明:(1)土壤与基岩是滴水的主要物质来源,Mg、Ba、Sr符合"土壤-基岩"二元物源模型,但各自所占比例并不相同.(2)在空间上,洞穴系统相互作用带中各元素迁移相互联系.滴水继承了土壤及基岩的信号,现代沉积物又能延续滴水各元素的信息.元素在土壤纵剖面中表现出了明显的淋溶和淀积作用,最下层土壤较好地继承了基岩中微量元素的信息.(3)在时间上,洞穴系统相互作用带中各元素迁移复杂多变.土壤及滴水受降水淋滤作用影响皆表现明显的季节差异,然在岩溶水运移路径、PCP作用、极端干旱和年降水雨型的影响下,滴水元素浓度旱、雨季差异明显较土壤小.而PCP作用及元素选择性淋滤等因素又改变了沉积物中元素对滴水元素的延续特性.
[Abstract]:In order to explore the temporal and spatial variation characteristics and process of element migration in the key Karst Zone of Karst, from October 2009 to May 2015, the components (atmospheric precipitation, soil, bedrock, cave drip, cave modern sediment) in Jiguan Cave interaction Zone, western Henan Province, were continuously monitored and sampled and analyzed, and 650 experimental data were obtained. The variation and migration of Ca,Mg,Ba,Sr, 未 ~ (13) C and element ratio in different components were compared. The results show that: (1) soil and bedrock are the main material sources of dripping water, and Mg,Ba,Sr accords with the "soil-bedrock" binary material source model, but the proportion of them is not the same. (2) in space, the migration of elements in the interaction zone of cave system is related to each other. Dripping inherits the signals of soil and bedrock, and modern sediments can continue the information of dripping elements. The elements showed obvious leaching and deposition in the longitudinal section of the soil, and the information of trace elements in the bedrock was well inherited in the lower layer of the soil. (3) in time, the migration of the elements in the interaction zone of the cave system was complex and changeable. Soil and drip were affected by precipitation leaching, but under the influence of Karst water transport path, PCP action, extreme drought and annual precipitation rain type, the concentration of dripping elements was dry, and the difference in rainy season was significantly smaller than that in soil. However, PCP action and selective leaching of elements change the continuation characteristics of elements to drip elements in sediments.
【作者单位】： 西南大学地理科学学院岩溶环境重庆市重点实验室;国土资源部岩溶生态环境-重庆南川野外基地;河南省鸡冠洞风景名胜区管理处;
【基金】：国家自然科学基金项目(41672160,41372177,40902053) 国家重点研发计划项目(2016YFC050230205)
【分类号】：P642.25
[Abstract]:In order to explore the temporal and spatial variation characteristics and process of element migration in the key Karst Zone of Karst, from October 2009 to May 2015, the components (atmospheric precipitation, soil, bedrock, cave drip, cave modern sediment) in Jiguan Cave interaction Zone, western Henan Province, were continuously monitored and sampled and analyzed, and 650 experimental data were obtained. The variation and migration of Ca,Mg,Ba,Sr, 未 ~ (13) C and element ratio in different components were compared. The results show that: (1) soil and bedrock are the main material sources of dripping water, and Mg,Ba,Sr accords with the "soil-bedrock" binary material source model, but the proportion of them is not the same. (2) in space, the migration of elements in the interaction zone of cave system is related to each other. Dripping inherits the signals of soil and bedrock, and modern sediments can continue the information of dripping elements. The elements showed obvious leaching and deposition in the longitudinal section of the soil, and the information of trace elements in the bedrock was well inherited in the lower layer of the soil. (3) in time, the migration of the elements in the interaction zone of the cave system was complex and changeable. Soil and drip were affected by precipitation leaching, but under the influence of Karst water transport path, PCP action, extreme drought and annual precipitation rain type, the concentration of dripping elements was dry, and the difference in rainy season was significantly smaller than that in soil. However, PCP action and selective leaching of elements change the continuation characteristics of elements to drip elements in sediments.
【作者单位】： 西南大学地理科学学院岩溶环境重庆市重点实验室;国土资源部岩溶生态环境-重庆南川野外基地;河南省鸡冠洞风景名胜区管理处;
【基金】：国家自然科学基金项目(41672160,41372177,40902053) 国家重点研发计划项目(2016YFC050230205)
【分类号】：P642.25
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