The second and third stages of magmatism occurred before the main orogenic episodes in the end of mid-Jurassic and late-Jurassic,respectively; therefore,the main orogenic episodes have counterclockwise(CCW)P-T-t path.

• 其中 ,第二、三岩浆活动阶段分别早于燕山造山带在中、晚侏罗世末的两次主造山幕发生的时代 ,所以燕山地区主造山幕的 P-T-t演化为逆时针轨迹。