关键词: 粘土矿物, 微量元素, 沉积环境, 海相沉积, 陆相沉积, 湖泊沉积, 硼, 镓

Abstract: Many contradictions have been observed when the boron content or the B/Ga ratio in clay mineral,or the graph showing the relationship between boron and gallium is applied to differentiate the marine facies from the continental facies.By analyzing the boron content in the saline formation in the Tertiary Continental facies in the west part of China and that from the bottom of mud slurry samples in a modern salt lake,as well as the B/Ga ratio calculated,it is demonstrated that this indicator can not differentiate the marine facies from the inland salt lake facies.The reliability of the study of the marine transgression in the Tertiary formation in China by using this indicator is questionable.According to the results of the studies of the boron contents in the salt lakes and the hot springs in Qinghai-Tibet Plateau,the question,why the boron content of many salt lakes are much higher than that of marine facies,is explained.