第三纪是世界上盐类矿床的一个重要成矿期,我国情况也不例外。目前若将国内各个不同地质时期成盐作用作一比较,不论就其分布范围、数量以及矿床规模,第三纪均占有比较重要的地位。在成盐作用的同时,第三纪又是我国主要聚煤期之一,在它的早期以及晚期,在我国都形成了一些重要的煤田。 Tertiary is an important metallogenic stage of salt deposits in the world. Our country is no exception. At present, if we compare the salt-forming effects in different geologic periods of our country, the Tertiary holds a relatively important position in terms of its distribution range, number and deposit size. While salt-forming, the Tertiary is one of the major coal-forming episodes in our country. In its early and late stages, some important coal fields were formed in our country.