干旱区生态环境知识资源中心(Arid): 不同岩性试片溶蚀速率差异及意义

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	不同岩性试片溶蚀速率差异及意义
其他题名	Dissolution Rate and It’s Significance of Different Lithological Tablets
	黄奇波; 覃小群; 刘朋雨; 蓝芙宁; 张连凯
来源期刊	地球与环境
ISSN	1672-9250
出版年	2015
卷号	43 期号:4 页码:379-385
中文摘要	评价岩性对溶蚀速率的影响有助于提高岩溶碳汇强度估算精度,对当前全球气候变化研究意义重大。本文通过在山西晋中盆地西南,吕梁山东侧的半干旱岩溶区典型小流域开展标准试片与当地试片的对比溶蚀试验研究,结果显示当地试片的溶蚀速率(0.122 3~0.532 8 mg/(cm~2·a)和岩溶碳汇强度(1.713 tCO_2/(km~2·a))明显小于标准试片(0.254 7~0.551 1 mg/(cm~2·a)和1.821 tCO_2/(km~2·a)),表明使用标准溶蚀试片法会使岩溶碳汇强度被高估。当地试片的溶蚀速率与酸不溶物含量呈负相关关系,进一步表明当地试片酸不溶物含量(2.58%~10.86%)大于标准试片(3%)是造成其溶蚀速率和岩溶碳汇强度小于标准试片的重要原因。也就是说,由于埋放地地层岩性与标准溶蚀试片岩性特征存在差异,不同地区均采用埋放标准试片的溶蚀实验方法来研究岩溶碳汇效应会产生较大的误差。因此,为了更加精确的计算岩溶碳汇量,后期研究中有必要使用埋放地的岩性试片来替代标准溶蚀试片。
英文摘要	Influence of lithology on dissolution rate is helpful to estimate karst carbon sink intensity, which is of great significance to the research on global climate change. Comparative dissolution experiment with standard tablets and local tablets was carried out in a typical small watershed in semi-arid area, southwest of the Jinzhong Basin, Shangxi Province, China. Results show that the dissolution rate (0.122 3-0.532 8 mg/(cm~2·a)) and karst carbon sink intensity (1.713 tCO_2 / (km~2·a) of local rock tablets are significantly lower than those of standard rock tablets (0.254 7-0.551 1 mg/(cm~2·a) and 1.815 tCO_2/(km~2·a)), respectively. This means that the karst carbon sink intensity is overrated by standard rock tablets method. The negative correlation between tablets dissolution rate and contents of acid insoluble further indicates that higher levels of acid insoluble content of local tablets (2.58%-10.86%)than those of the standard tablets (3%) are the major cause for the lower dissolution rate and karst carbon sink intensity. In other words, since there are differences characteristics of formation lithology between local tablets and standard tablets, great error will be produced by using standard tablets to study karst carbon sink effect of different regions. Therefore, in order to accurately calculate the amount of karst carbon sink, it is necessary to use local rock tablets instead of the standard tablets.
中文关键词	岩溶碳汇 ; 溶蚀试片 ; 溶蚀速率 ; 酸不溶物
英文关键词	karst carbon sink dissolution tablet dissolution rate acid insoluble
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:5501359
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232534
作者单位	中国地质科学院岩溶地质研究所, 国土资源部广西岩溶动力学重点实验室, 桂林, 广西 541004, 中国
推荐引用方式 GB/T 7714	黄奇波,覃小群,刘朋雨,等. 不同岩性试片溶蚀速率差异及意义[J],2015,43(4):379-385.
APA	黄奇波,覃小群,刘朋雨,蓝芙宁,&张连凯.(2015).不同岩性试片溶蚀速率差异及意义.地球与环境,43(4),379-385.
MLA	黄奇波,et al."不同岩性试片溶蚀速率差异及意义".地球与环境 43.4(2015):379-385.