O-type terrane pos-seas Archean and Early Prototerozoic green stone belt;C-type terrane only possess Archean green stone belt.The former favoured formation of gold deposits. 2.

• 2．基底地层年代学是确定地体类型的重要基础．O-型地体是具有太古代绿岩带和早元古绿岩带；