Mesozoic volcanic rocks in the eastern part of the North Dabie Mountains are rich inNa ( Na2O=4.03%, Na2O/K2O = 1.31 ), Sr (865μg/g) and Ba ( 1361μg/g) , and
In recent years, the calculus disease occurs occasionally in Songbai Town, Hubei Province, which is the capital of the Shennongjia forest district, and shows a