[1]李 渊,刘子琦,吕小溪,等.贵州石漠化地区降雨期间洞穴滴水的元素变化特征——以石将军洞为例[J].山地学报,2017,(06):799-807.[doi:10.16089/j.cnki.1008-2786.000280]
 LI Yuan,LIU Ziqi*,LV Xiaoxi,et al.Elemental Variation of Cave Drips during Rainfall in Rocky Desertification Areas ——A Case Study of Shijiangjun Cave[J].Mountain Research,2017,(06):799-807.[doi:10.16089/j.cnki.1008-2786.000280]
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贵州石漠化地区降雨期间洞穴滴水的元素变化特征——以石将军洞为例()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2017年06期
页码:
799-807
栏目:
山地生态与环境
出版日期:
2017-11-30

文章信息/Info

Title:
Elemental Variation of Cave Drips during Rainfall in Rocky Desertification Areas ——A Case Study of Shijiangjun Cave
文章编号:
1008-2786-(2017)6-799-09
作者:
李 渊刘子琦吕小溪曹 洋
贵州师范大学喀斯特研究院 国家喀斯特石漠化防治工程技术研究中心,贵阳 550001
Author(s):
LI Yuan LIU Ziqi* LV Xiaoxi CAO Yang
School of Karst Science,Guizhou Normal University,State Engineering Technology Institute for Karst Desertification Control,Guiyang 550001,China
关键词:
滴水 元素 降雨响应 石漠化
Keywords:
cave drips element rainfall response rocky desertification
分类号:
P595
DOI:
10.16089/j.cnki.1008-2786.000280
文献标志码:
A
摘要:
探明洞穴岩溶水的运移机制与滴水元素的成分来源,是利用沉积物元素反演古环境研究的前提。本研究对贵州安顺地区的石将军洞上覆土壤、基岩样品中的Ca、Mg、Sr、Ba元素进行分析,以及对洞穴中3个滴水点的元素进行了降雨响应监测,分析了洞穴滴水的降雨响应特征及其元素的成分来源。结果表明:受地表石漠化发育影响,石将军洞滴水对大气降雨响应时间较快,且各离子浓度随降雨响应相应升高; 3个滴水点在降雨响应中的水动力作用类型与元素的时空变化差异较大,体现出每个滴水点的元素来源差异; 滴水在降雨响应中的Ba、Sr元素主要来源于基岩,Ca、Mg元素来源受制于滴水点上覆土壤的发育程度,土壤层越厚,滴水Ca、Mg元素受到土壤的贡献越多,土壤层越薄,滴水Ca、Mg元素受到基岩的贡献越多。洞穴滴水的降雨响应研究为利用沉积物反演石漠化环境演变过程提供了重要的科学依据。
Abstract:
Understanding the migration mechanism of karst water and the source of elements in the cave drips are the prerequisites for the retrieval of paleoenvironment by speleothem.In order to investigate the characteristics of cave drip in response to rainfall and the composition source of element in drip, in this study Ca, Mg, Sr and Ba elements in the overlying soil and bedrock of Shijiangjun Cave in Anshun region of Guizhou Province was analyzed and observation on the rainfall response of three drip points in the cave was carefully conducted.Results showed that due to the development of rocky desertification, the reaction of drips to rainfall in Shijiangjun Cave got faster, and ion concentration increased correspondingly with rainfall response.The existence of fracture, vadose, corrosion, water-rock interaction in overlying soil or bedrock contributed to the irregular variation of drip composition after rainfall.The reaction of Ca2+ and Mg2+ to rainfall was 12 h respectively.At drip point A, Ba2+ and Sr2+ had response time 30 h.At drip point B, Ca2+, Mg2+, Sr2+, Ba2+ were within 3 h but 24 h at drip point C.In response to rainfall, the hydrodynamic action types of the three drip points and those of elements exhibited distinct temporal and spatial variation, suggesting a noticeable difference of elemental origin at each drip point.Ba and Sr in drips during rainfall were mainly derived from bedrock, and the sources of Ca and Mg were controlled by the development degree of the overburden soil above the drip points.With the thicker the soil layer, Ca, Mg elements in drips received more supply from soil above whereas Ca, Mg were attributed more to bedrock as soil layer grow thinner.The response of cave drips to rainfall would provide an important scientific insight for using speleothem to retrieve the evolution of rocky desertification environment.

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备注/Memo

备注/Memo:
收稿日期(Received date):2016-02-27; 改回日期(Accepted date):2016-09-07
基金项目(Foundation item):国家自然科学基金项目(41761104); 贵州省科技计划课题(黔科合社G字[2012]4008); 贵州省研究生教育创新计划项目(黔教研合GZS字[2016]04号)[National Natural Science Foundation of China(41761104), Science and Technology Planning Project of Guizhou Province(Grant No.2012-4008)and Innovation Program for Postgraduate Education of Guizhou Province(No.2016-04).]
作者简介(Biography):李渊(1990-),男,博士研究生,研究方向为喀斯特洞穴及石漠化环境监测 [Li Yuan(1990-),male,Ph.D candidate,research on karst cave and environmental monitoring of rocky desertification.] E-mail:liyuan7pro@163.com
*通信作者(Corresponding author):刘子琦(1979-),女,博士,副教授,主要从事石漠化治理及古环境重建研究 [Liu Ziqi(1979-),female,Ph.D,associate professor,mian field:Rocky desertification treatment and paleoenvironmental reconstruction.] E-mail: 124294329@qq.com
更新日期/Last Update: 2017-11-30