贺兰口岩画岩石材料风化微观特性分析  

The Rock Microscopic Characteristic for the Rock Paintings Located in Helankou

作　　者：杨有贞[1,2] 冯晓芳[1] 何贤元 马文国[1,2] 马海龙[3] 樊怡[1] 

机构地区：[1]宁夏大学物理与电子电气工程学院,宁夏银川750021 [2]宁夏大学固体力学研究所,宁夏银川750021 [3]宁夏大学民族预科教育学院,宁夏银川750021

出　　处：《宁夏师范学院学报》2016年第6期53-59,共7页Journal of Ningxia Normal University

基　　金：国家自然科学基金(11662015);宁夏重点研发项目(2016KJHM35);宁夏高校科学研究项目(NGY2016060);宁夏大学研究生创新项目(GIP201607)

摘　　要：以贺兰口6个分区的岩画岩石材料为研究对象,首先进行岩石吸水特性试验,获得吸水率在时间序列上的变化规律.其次选取尺寸为1 cm×1 cm×0.1 cm的岩样薄片,在4种不同放大倍数下,对其风化面、新鲜面和不同区岩石微观特性进行SEM对比观察,探讨岩石的孔隙特性和胶结结构.结果表明,岩石的风化程度与其吸水特性和微观特征有必然联系,吸水率愈大,孔隙愈多,岩石胶结愈疏松,岩样结构愈不完整,岩画风化程度越大.本文的研究确定了吸水率和微观特征可以表征岩画风化程度,为贺兰山岩画保护和修复工作提供了一定的理论基础.The rock materials of six partitions of Helankou were chosen to obtain the changing of the bibulous rate with the time after water absorption characteristic test. Then slices with size of 1 cm × 1 cm × 0. 1 cm were selected to explore the pore characteristics and the cement structure by SEM microscopic with four different magnifications. The features were compared with fresh rock,weathering rock and samples of different areas. The results showed that the weathering degree of rock paintings has a closely connection with its water absorption properties and microscopic characteristics i. e.,larger bibulous rate,more pore,more loose and more weathering degree. So the water absorption and microscopic features can describe the degree of rock weathering,which will provide a scientific theoretical basis for the protection and restoration of Helan mountain rock paintings in the future.

关 键 词：贺兰口岩画 风化 吸水率 微观特征 

分 类 号：P585[天文地球—岩石学]