Comparison of hydrogeological characteristics and genesis of the Xiaguan Hot Spring and the Butterfly Spring in Yunnan of China

•Contents of hydrochemical constituents in the YD1 is much higher than in the YD2.•Dissolution of albite, halite and ion exchange result in high content of Na in YD1.•UCC-normalized REE patterns of the springs are of increasing fluctuation trend.•YD1 is a deep circulation spring, while YD2 is a shallow circulation spring.•The Red River fault zone controls the conduction of water and heat in the YD1.