双同钊, 王中美, 蒋文杰,等.贵州西部茅口组灰岩岩溶作用的关键元素与化学溶蚀指数研究[J].河南理工大学学报（自然科学版）,2023,42(1):54-61.

SHUANG T Z, WANG Z M, JIANG W J, et al.Study on key elements and chemical dissolution index of limestone karstification of Maokou Formation in western Guizhou[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(1):54-61.

贵州西部茅口组灰岩岩溶作用的关键元素与化学溶蚀指数研究

双同钊, 王中美, 蒋文杰, 褚学伟

贵州大学 资源与环境工程学院，贵州 贵阳 550025

摘要:为厘定茅口组灰岩岩溶化程度的化学溶蚀指数（chemical dissolution index，CHI），采用岩矿鉴定、电镜扫描和能谱分析试验，运用单因素方差分析和多变量判别分析确定贵州西部茅口组灰岩岩溶作用的关键元素，依据主成分贡献率理论建立化学溶蚀指标。结果表明：强岩溶化、中岩溶化和新鲜灰岩微观平均面岩溶发育率分别为16.658%，7.892%，0.073%；不同岩溶化程度灰岩地球化学成分差异的关键元素及影响程度大小依次为Ca，Si，Fe，Al，Mg，O，C；建立的半定量化学溶蚀指数为CHI=-16.937×ln w（Ca）-5.675×ln w（Mg）-4.925×ln w（Si）＋3.025×ln w（Al）＋1.240×ln w（Fe）-43.308，该指数基本反映了灰岩岩溶化实际情况，可为贵州西部岩溶区工程建设提供理论与技术支持。

关键词:茅口组灰岩;岩溶作用;关键元素;化学溶蚀指数;贵州西部

doi:10.16186/j.cnki.1673-9787.2020100019

基金项目:国家自然科学基金资助项目（42062016）； 贵州省科技计划联合基金资助项目（黔科合LH字［2017］7284号）；贵州省科学技术厅科技平台及人才团队计划项目（黔科合平台人才［2017］5402号）

收稿日期:2020/10/12

修回日期:2020/12/28

出版日期:2023/01/25

Study on key elements and chemical dissolution index of limestone karstification of Maokou Formation in western Guizhou

SHUANG Tongzhao, WANG Zhongmei, JIANG Wenjie, CHU Xuewei

College of Resources and Environmental Engineering，Guizhou University，Guiyang  550025，Guizhou，China

Abstract:In order to determine the chemical dissolution index （CHI） of the degree of limestone karstification in Maokou Formation，the key elements of limestone karstification in Maokou Formation in Western Guizhou were determined by rock mineral identification，electron microscope scanning，energy spectrum analysis experiment，single factor ANOVA and multivariate discriminant analysis.And based on the principal component contribution rate theory，the chemical dissolution index was established.The results showed that the average surface karst development rates of strong karstification，middle karstification and fresh limestone were 16.658%，7.892%，and 0.073%，respectively.The key elements and degree of influence of geochemical composition difference of limestone with different degree of karstification were Ca，Si，Fe，Al，Mg，O，C in turn.The established semi-quantitative chemical dissolution index was CHI=-16.937×ln w（Ca）-5.675×ln w（Mg）-4.925×ln w（Si）+3.025×ln w（Al）+1.240×ln w（Fe）-43.308.This index basically reflected the actual situation of limestone karstification and could provide theoretical and technical support for the construction of projects in Western Guizhou karst area.

Key words:limestone of Maokou Formation;karstification;key element;chemical dissolution index;western Guizhou

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