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大厂矿田是我国最大的锡矿田之一,研究程度较高,但迄今为止的研究偏重于矿床方面,而对与锡矿床有密切成因联系的大厂花岗岩类岩石,则研究程度相对较差。加之,研究花岗岩类的年龄并讨论其与锡矿床等的形成时代,具有重要意义。因此,近几年来,在研究该矿田有关问题的同时,着重注意了与锡矿床有关的花岗岩类的研究。结果发现,与锡、钨有关的花岗岩类是一种3B型花岗岩,关于这类型花岗岩类的特征,已有另文发表本文将主要讨论与锡矿床等有密切成因联系的大厂花岗岩的形成年龄及成矿时代。
Dachang ore field is one of the largest tin orefields in our country with a high degree of research. However, the research so far has been more emphasis on ore deposits. However, Dachang granite rock, which is closely related to the genesis of the tin deposit, is relatively poorly studied . In addition, it is of great significance to study the age of granitoids and to discuss their formation with tin deposits. Therefore, in recent years, while studying the related problems in the ore field, attention has been paid to the study of granitoids related to the tin deposits. As a result, it is found that the granite related to tin and tungsten is a type 3B granite. Regarding the characteristics of this type of granite, another article has been published. This paper will mainly discuss the formation age of the granite that is closely related to the tin deposit, And mineralization era.