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由于世界第一大峡谷在青藏高原的雅鲁藏布江下游的新发现,世界地理教科书有关大峡谷的段落从此需要改写。过去被称为世界第一,深达2133米的美国科罗拉多大峡谷,以及秘鲁深达3200米的科尔卡大峡谷都退居了次要位置。雅鲁藏布江下游的大峡谷,深达5382米,是世界上最长、最深、海拔最高的大峡谷。中国地理学家杨逸畴和高登义、李渤生是这个世界第一大峡谷的第一发现者、论证者,也是进入大峡谷次数最多的考察者。仅仅杨逸畴,从25岁到52岁的28年里,先后18次踏上青藏高原,6次冒着艰险进入大峡谷。在这“世界屋脊”上,累计探险考察时间长达8年多。在这高峡飞峙、江涛汹涌的峡谷中探险,需穿密林、攀溜索、过藤网桥,冒着泥石流扑来的险情,天震地抖,使整个人像在天堂与地狱之间徘徊,在生命的极限上挣扎。其艰险的程度为常人所难以想象。从实地考察证实,雅鲁藏布江大峡谷是地震最活跃的地区。这里由欧亚板块与印度板块碰撞造成的断层带而发育形成的南迦巴瓦峰,是年轻喜马拉雅强烈上升的中心,是地应力最集中的地方之一。1950年的大地震,就是一次现代地壳构造运动。
Because of the new discoveries in the lower reaches of the Brahmaputra in the Qinghai-Tibet Plateau, the world’s largest canyon, the section of the world geography textbook on the Grand Canyon needs to be rewritten. Known as the world’s first, the 2133-meter deep Colorado Grand Canyon in the United States and the 2,800-meter Kercoli Grand Canyon in Peru are all relegated to the second place. The lower reaches of the Brahmaputra Grand Canyon, up to 5382 meters, is the world’s longest, deepest, the highest elevation of the Grand Canyon. The Chinese geographers Yang Yi-chou and Gordon righteousness, Li Borson are the first discoverer and arguer in the world’s largest Grand Canyon and also the most frequent observer in the Grand Canyon. Only Yang Yi-chou, from the age of 25 to 52-year-old 28 years, has set foot on the Qinghai-Tibet Plateau 18 times, 6 times brave and dangerous to enter the Grand Canyon. On this “Roof of the World,” a total of more than eight years of expeditions have been conducted. In this high Gap flight, the turbulent canyon adventure, the need to wear the jungle, climb the rope, crosses the vine bridge, risking debris flow flutter, tremors shaking, so that the whole portrait hovering between heaven and hell , Struggling at the limit of life. The degree of hardships and dangers for ordinary people can not imagine. Field trips confirmed that the Brahmaputra Grand Canyon is the most active earthquake area. The Namjagbarwa, developed by the fault zone caused by the collision between the Eurasian Plate and the Indian Plate, is the center of the young Himalayas’ strong rise and one of the places where the earth stress is most concentrated. The great earthquake of 1950 is a modern crust tectonic movement.