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昆明盆地位于云南省中部,是云贵高原上最大的山间断陷盆地。东西宽约20公里,南北长约60公里。地势东高西低,北高南低,中部平坦。海拔高度为1900米左右。滇池嵌于盆地中偏西部,为该区最大的地表水体。盆地为第四纪沉积物覆盖,厚度各处不一,变化甚大。盆地周围为中生代至古生代地层出露,并组成基底。本文根据物探资料,对第四纪沉积层的厚度与变化特征进行了研究。
The Kunming Basin, located in the middle of Yunnan Province, is the largest mountain fault basin on the Yunnan-Guizhou Plateau. Things 20 km wide, about 60 km long from north to south. The terrain is high in the west, low in the north, low in the south, flat in the middle. The altitude is about 1900 meters. Dianchi Lake is embedded in the western part of the basin, which is the largest surface water body in the area. The basin is covered by Quaternary sediments, varying in thickness and varying widely. Around the basin, Mesozoic to Paleozoic strata are exposed and form the basement. Based on the geophysical data, this paper studies the thickness and variation characteristics of Quaternary sediments.