论文部分内容阅读
一、前言昆仑山口位于素有“世界屋脊”之称的青藏高原多年冻土区的北缘,海拔4600—5100 米;气候严寒,年平均气温-5.7℃,几乎常年冰封;降水量少,年降水量275.5毫米; 植被稀疏,多为一些旱生草本植物,属高寒荒漠区。 1967年中国科学院青藏冻土队在青藏公路沿线进行考察,对昆仑山垭口盆地西部出露近200米厚的第四纪地层进行了调查和孢粉分析研究,其中的介形虫化石分别由同济大学
Foreword The Kunlun Mountain Pass is located in the northern edge of the permafrost region, known as “Roof of the World,” with an elevation of 4,600 to 5,100 meters above sea level. The weather is very cold, with an annual average temperature of -5.7 ° C, Less, the annual rainfall of 275.5 mm; sparse vegetation, mostly for some of the xerophytic herbs, is alpine desert. In 1967, the Qinghai-Tibet Plateau Permafrost Team of the Chinese Academy of Sciences conducted a survey along the Qinghai-Tibet Highway and investigated the Quaternary stratigraphy nearly 200 meters thick exposed in the west of the Kunlun Pass Yarlung Basin. Pollen analysis was carried out in this area. the University