中文摘要：

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^13C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.

英文摘要：

To explore the temporal and spatial variations and the process of trace element migration in the karst critical zone,continuous fixed-point monitoring and sampling analysis was applied to measure each cave system component,which includes rainfall,soils,bedrock,drip waters,and their aerial sediment. Approximately 650 experimental data were obtained from October 2009 to May2015 in a typical karst critical zone in north China—an interactive zone of the Jiguan Cave in the west Henan Province. The variations in and the migration rules of Ca,Mg,Ba,Sr,and δ^13C as well as their ratios to different components were studied. The results show that：（1） Soil and bedrock are the main sources of drip water. The values of Mg,Ba,and Sr are consistent with the＂soil-bedrock＂two end-members model and their respective proportions are 43. 6∶ 56. 4,1. 01∶ 98. 09,and 47. 2∶ 52. 8.（2） From the spatial perspective,element migration of each component in the cave system interactive zone is interrelated. Drip water inherits the signals of the soil and bedrock and the modern sediment can continue the element information of the drip water. Elements in the soil profile cause the leaching and deposition effect and the subsoil better inherits the information of trace elements in the bedrock.（3） From the temporal perspective,the migration of elements in the cave system interactive zone is complex. Because of the leaching effect,soil and drip water show obvious seasonal discrepancies. However,under the influence of karst water migration path,the prior calcite precipitation（ PCP）,and extreme arid and annual precipitation type,the seasonal discrepancy in the element concentrations in drip water is smaller than in soil.The PCP effect,selective leaching,and other factors change the continuity of elements released from sediment to drip water.（4） In order to systematically and comprehensively ascertain the trace element migration in the karst critical zone and energy transformation rules,the study of cave system should