The tectono-magmatism in northeastern Hunan Province might be a consequence of interaction between the Yangtze and Cathaysian plates and deep lithospheric processes.

• 湘东北燕山期岩浆活动最为强烈,以燕山早期花岗岩分布最为广泛,主要由幕阜山、连云山、金井、望湘、蕉溪岭、龙王排等岩体组成。