云冈石窟砂岩微观风化特征研究  

Research on Characterization of Sandstone Weathering of Yungang Grottoes

作　　者：翁履谦[1] 杨海峰[1] 王逢睿 宋申华[1] 

机构地区：[1]哈尔滨工业大学深圳研究生院,深圳518055 [2]中铁西北科学研究院有限公司,兰州730000

出　　处：《材料导报（纳米与新材料专辑）》2011年第2期425-428,共4页

基　　金："十一五"科技支撑计划项目(2009BAK53B04)

摘　　要：云冈石窟周边岩石风化严重,岩石风化引发了多种文物病害,对云冈石窟的文物价值造成严重破坏。岩石主要成分微斜长石与H2O反应生成高岭石,岩石碳酸盐胶结物与空气中的SO2、CO2、H2O等发生化学反应,生成石膏、水碳镁石及球碳镁石等,降低了矿物颗粒间的结合强度,最终致使砂岩结构疏松。通过SEM与XRD等分析对比不同风化程度砂岩的特征,探讨了化学风化对岩石微观特征的影响。The rock around Yungang grottoes are seriously weathered. Water and air pollution are the main extrinsic factors of chemical weathering, causing various kinds of cultural relic diseases, and then damaging the cuhu-ral relic of Yungang grottoes. The microline which is a main component of rock reacts with H2O to form kaoline. The reaction Of carbonate cement in rocks and SO2, CO2 and H2O in air forms gypsum and hydromagnesite, reducing the cohesion between the mineral grains, and then loosening the sandstone. The characteristics of sandstones in diffe-rent degrees of chemical weathering are analyzed using scanning electron microscope and X-ray diffraction, and then the effect of chemical weathering on the microscopic characteristics of rocks is discussed.

关 键 词：云冈石窟 化学风化 碳酸盐胶结物 大气污染 

分 类 号：P618.130.2[天文地球—矿床学]