燕山期
yanshan epoch
yanshan period
Yanshan geological period
Yanshanian stage
the Yanshanian period
Yanshanian epoch
Ore-forming Epoch
yanshanian period
yanshanian movement
Yanshannian
Yanshanian
Suohugou gold deposit
south china
the Yanshanian
国外花岗岩类研究
granitoid researches abroad
花岗岩类成因动力学
dynamics of granite genesis
韧变花岗岩类
ductile defermated granites
燕山期花岗岩浆
Granitic magma of Yanshanian stage
燕山期变形
The Yanshanian deformation