Complex sentence: As 3690 Ma was the age yielded from the youngest tonalite only native in Northern terrane and 3660 Ma is the age yielded from the ultramafic-to-dioritic Inaluk dykes, which is a common intrusion in both terrane.
Split into simpler sentences: As 3690 Ma was the age yielded from the youngest tonalite, which is only native in Northern terrane. And 3660 Ma is the age yielded from the ultramafic-to-dioritic Inaluk dykes, which is a common intrusion in both terrane.