In accompany with rifting of the supercontinent in the middle archean and subsequent collision, extensive and multiphase magmatism, characterized by bimodal suites, takes place in this belt.

• 自中太古宙以来，随着超大陆地壳的张裂和闭合，相伴有频繁而剧烈的岩浆活动，皆呈双峰式火山岩套和双模式侵入岩套组合。