滩间山群是柴达木盆地北缘早古生代重要的火山－沉积建造,总体为一套绿片岩相和强烈变形岩石。基于野外地质特征,古生物组合,同位素年龄,构造-热事件和火山－沉积演化等的综合分析,本文认为滩间山群形成于早－晚奥陶世,同位素年龄在496-440Ma之间。重新厘定的滩间山群从老到新岩石地层单位有:早－中奥陶世火山－碎屑岩组；晚奥陶世沉积岩组；晚奥陶世熔岩－次火山岩组。原滩间山群c岩组(紫色砂砾岩组)变质微弱,仅达千枚岩相,与晚奥陶世熔岩－次火山岩组间呈角度不整合接触,其中的泥质岩Rb-Sr等时线年龄为313±1.0Ma(代表其千枚岩相的变质年龄),将其从滩间山群中剥离,归属早志留世。新的层序总体反映柴北缘早古生代经历了大陆裂谷开合的演化过程。

昆明市地热田的开发利用已有20多年历史，部分地段长期过量开采诱发的环境地质问题日趋突出。本文用TOPSIS法和综合指数法对昆明市南市区近10年来地下热水水质演变过程及现状作分析评价，研究结果表明昆明市地下热水已遭受到不同程度的污染，并且有恶化的趋势。

Since the Genoroic, especially the Quaternary, tectonic movement has been strengthening in northwestern Yunnan, China. The tectonic elevation rate of mountains changed from 0.3～1.7 mm/s (before the Holocene) to 2～7.1mm/s (after the Holocene). The displacement rate of the Holocene basins increases by 1～2 orders of magnitude relative to the Pleistocene. The displacement rate of the quaternary fractures increases continuously. Modern crustal stress values become high. Tectonic deformation speeds up. Seismic activities strengthen. Geothermal flux anomaly is pronounced. The strengthening tectonic activities will result in changes of the topographic frame of northwestern Yunnan, worsen mountain geologic disaster, speed up the contraction of lakes and decrease the regional stability. Therefore, human beings will face the challenge of a more rigorous environment.