The Fogang granitoid complex is the largest Late Mesozoic batholith in Nanling region, and the Wushi diorite-hornblende gabbros are the most basic end-member of Fogang calc-alkaline series rocks.
The volume proportion of basalts is less than 30% even in bimodal volcanic rocks. The basalts are mainly of calc-alkaline series rather than tholeiites.