| 陕西翠华山山崩地质遗迹特征、成因及景观价值 |
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| 关键词:granite rock avalanche earthquake geological relics |
| 基金项目:国家基础研究计划(“973”)项目(编号: 2014CB744702);国土资源部地质矿产调查评价专项(编号: 1212011120001; 1212011140026) |
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| 摘要: |
| Characteristics, Genetic Mechanism and Landscape Value of the Rock Avalanche in Cuihua Mountain Area, Shannxi Province |
| Xi’an is one of the oldest cities in China and has a civilization history of more than 3000 years. Recently, several large-scale rock avalanches have been found in peaks of the Qinling Mountains on the southern side of this city, and these rock avalanches might have a history as long as the city’s civilization. Among them, the Cuihua rock avalanche (CRA) located 30 kilometers to the south of Xi’an City is the most typical one, which, with characteristics of large scale, magnificent scene and good preservation, is called geological museum or miracle scenery of rock avalanche in China. Based on field investigation and geophysical prospecting, the authors studied such features of this rock avalanche as its geomorphology, volume, age, genetic mechanism and dynamics process. The results indicate that the volume of the rock avalanche is up to 1.8×107 m3 and its age is about 2900 years, suggesting that it resulted from the earthquake of 780 BC. The results of numerical simulation show that the whole failure process included four stages of starting up, accelerating, decelerating and accumulating; furthermore, the rock avalanche has some features of high speed and long distance. The study of the Cuihua rock avalanche has special importance for geological heritage protection, landslide research and tourism resources development. |
| LÜ Yan,DONG Ying,ZHANG Mao-sheng,YANG Jian-ping,LI Ya-zhe.2015.Characteristics, Genetic Mechanism and Landscape Value of the Rock Avalanche in Cuihua Mountain Area, Shannxi Province[J].Acta Geoscientica Sinica,36(2):220-228. |
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