昆明盆地的地质构造特征

Features of Geological Structure for Kunming Basin

根据昆明盆地新生代地层分布特征 ,分析昆明盆地的形成时代 ,并通过分析昆明盆地的主要断裂及其活动性、昆明盆地的基底构造 ,对昆明盆地的地质构造特征进行研究。结果认为 ,昆明盆地的形成时代为上新世中晚期 ,中更新世～晚更新世为昆明盆地全盛时期 ;控制昆明盆地形成与发展的有四组主要活动断裂 ;昆明盆地的基底构造表现为“两凹夹一隆”的构造形式。

Based on the distribution features of Cenozoic era strata in Kunming Basin, it has analyzed the forming times of Kunming Basin. Through analyzing major faults and activities and base structure, the paper performed studies to geological structural features in Kunming Basin. The results show that the forming times of Kunming Basin was mid-later period of Pliocene, and the vigorous time of Kunming Basin was mid-Pleistocene～later-Pleistocene. There are four groups of active faults controlling the forming and development of Kunming Basin. The base structure of Kunming Basin is expressed as Uplifting Sandwiched Between Two Concaves.