关于衢州古城墙通仙门凝灰岩砌块相对风化速度的研究  

RELATIVE WEATHERING RATES OF TUFF BLOCKS FORMING TONGXIAN GATE OF QUZHOU ANCIENT CITY WALL IN ZHEJIANG PROVINCE

作　　者：杨志法[1] 张路青[1] 陶克捷[1] 吴吉培 陈琪[1] 张中俭[1] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]浙江省衢州市文物局,衢州324000

出　　处：《工程地质学报》2008年第5期625-629,共5页Journal of Engineering Geology

基　　金：国家自然科学基金项目(No.40672190)的资助

摘　　要：岩石风化速度历来受到工程地质学界和地貌学界的关注,但由于岩石在自然条件下的风化速度很慢,通常很难测到定量化的结果。为了研究衢州古城通仙门城台基座的凝灰岩砌块的相对风化速度,作者利用与之相邻的石英砂岩水平砌块和它之间风化厚度的比较来估算凝灰岩相对于石英砂岩自明代筑城开始至今的相对风化速度,得出平均风化速度为0.086mm.a-1的结论。Researchers in engineering geology and geomorphology always pay close attention to the rock weathering rate. Howver, it is difficult to find the quantitative results of rock weathering rates because they are extremely low under the natural environment. This paper studies the relative weathering rate of tuff blocks forming the ancient city wall of Quzhou. The weathering thickness contrasts between the tuff blocks and the adjacent quartz sand block are used to calculate the tuff weathering rate on the basis of the quartz sand block. It is found that from the construction time in Ming Dynasty to present, the tuff block has an averaged weathering rate of 0.086mm per year.

关 键 词：风化速度 凝灰岩 衢州古城 

分 类 号：P642[天文地球—工程地质学]