Hailar basin is a fault-depressed basin formed on Variscan folded basement.
海拉尔盆地是在华力西褶皱基底上形成的中生代断陷盆地。
The development of the fractures and the distribution of basic rocks of Variscan age are also mentioned.
指出了该区断裂发育及华力西期基性岩的分布情况。
The most important metallogenic granitoid intrusions are mainly formed in Mesozoic, secondly late Variscan period.
已知成矿的花岗岩类侵入体主要为中生代岩体，其次为晚古生代华力西期岩体。
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