【摘要】 在陕西省凤翔县五曲湾滑坡的滑带土中发现一段树根,表面被炭化,并且发生了强烈的剪切变形,分析认为此乃滑坡滑动所致。经过14C测龄,年龄为462±45年B.P,这一年龄与地质分析获取的认识基本吻合,与1556年"华县大地震"发生的年份非常接近,从而为研究五曲湾滑坡的触发机制提供了重要依据。最后提出,如果在滑带土中发现可用于定年的样品,采用14C法测定滑坡年龄,是对滑坡进行定年的有效途径。更多还原

【Abstract】 A piece of tree root was found in the slip soil of a landslide in Wuquwan,Fengxiang County, Shaanxi Province. Surface of the root was carbonized and intensely sheared,which was analyzed to be resulted from a landslide sliding. 14C dating suggests that the landslide age is 462 ± 45 years. This datum accords with the geology analysis result and is close to the year of 1556 when the Huaxian earthquake took place. This information contributes to the study on triggering mechanism of the Wuquwan landslide. Consequently,if we can find a sample from the sliding soil that can be used for dating,the method of 14C dating should be an effective approach for dating the age of a landslide.更多还原