ABSTRACT

Data on the origin and morphology of lake depressions in Mongolia are relatively poor. Bayan Lake in Zavkhan Province, Western Mongolia, has freshwater, supplied by groundwater emanating from a tectonic fault-oriented northeast to southwest, defining the southeastern side of the Bayan Lake. The depression of Bayan Lake has a tectonic origin, related with the fault which on its southern side, which is covered by sand dunes. The results of morphometric analysis, satellite mapping, geomagnetic anomaly assessment, and other relevant methods all support that the southern margin of the lake is defined by a large fault. The depression morphology of Bayan Lake shows that it was formed by subsidence accommodated by the fault along the southwestern side of the lake. Bayan Lake depression has the origin tectonic, but the recent barrier in the south is the dunefield on the bedrock.

摘要

蒙古国湖泊洼地的成因和形态资料相对匮乏。蒙古西部扎夫汗省的巴彦湖有淡水，由从东北向西南方向的构造断层发出的地下水供应，确定了巴彦湖的东南侧。巴颜湖洼地有构造成因，与其南侧被沙丘覆盖的断层有关。形态计量分析、卫星测绘、地磁异常评估等相关方法的结果均支持该湖南缘为大断层。巴彦湖的凹陷形态表明，它是由沿湖西南侧的断裂所容纳的沉降形成的。巴彦湖坳陷有构造成因，