关于衢州古城墙通仙门凝灰岩砌块相对风化速度的研究

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。

RELATIVEWEATHERING RATES OF TUFF BLOCKS FORM ING TONGX IAN GATE OF QUZHOU ANCIENT CITYWALL IN ZHEJIANG PROVINCE

Researchers in eng ineer ing geo logy and geomorpho logy alw ays pay close attention to the rock w eathering rate. Howver, it is diff icult to f ind the quantitat ive results o f rock w eathering rates because they are ex treme ly low under the natural env ironmen.t Th is paper stud ies the relativew ea thering rate o f tu ff b locks form ing the ancient c ity w a ll of Quzhou. The w eather ing th ickness contrasts betw een the tuff b locks and the adjacent quartz sand b lock are used to ca lculate the tuffw eather ing rate on the basis o f the quartz sand block. It is found tha t from the construction time inM ing Dynasty to presen,t the tuff b lock has an averaged w eathering rate of 0. 086mm per year.