地质概况青藏高原素有“世界屋脊”、“地球第三极”之称,因而它的生态环境状况对全球环境保护具有特殊意义。所以,在青藏铁路施工中,施工方把保护生态环境放在首要位置。青藏高原自然生态环境原始、独特,生物丰富多样,生态系统极其脆弱、敏感,高寒草甸、高寒草原及多年冻 Geological overview The Qinghai-Tibet Plateau known as the “roof of the world”, “Earth’s third pole,” said, so its ecological environment has special significance for global environmental protection. Therefore, in the construction of the Qinghai-Tibet Railway, the construction side put the protection of the ecological environment at the top of the list. The natural ecological environment of the Qinghai-Tibet Plateau is primitive, unique, rich and diverse, with extremely fragile ecosystems, sensitive, alpine meadow, alpine grassland and perennial