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-  2005 

四川乐山大佛风化的初步探讨

DOI: 10.11821/yj2005060012

Keywords: 乐山大佛,石刻遗产,粉砂岩,侵蚀速率

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Abstract:

摘要: 四川乐山大佛石刻是我国重要的“世界文化与自然遗产”之一,石刻表面毁损非常严重。本文通过(1)检测石刻所在地区粉砂岩的样品成分(XRFS)获悉,SiO2含量高达84%;(2)安装微侵蚀测量装置(MEM)直接测得粉砂岩的表面侵蚀速率大约为0.216~0.305mm/a;结合(3)粉砂岩表面的相对硬度测试比较等途径,对石刻毁损的表面过程机制进行了初步的综合分析。结果表明,由于粉砂岩结构松散,经水浸后表面硬度急剧下降,而且当地的水、气等条件适宜于生物繁衍等特点,石刻风化毁损的原因主要在于水、生物等环境因素对粉砂岩胶结物有强烈的破坏作用。

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