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.
英
美
- 其中 ,第二、三巖漿活動(dòng)階段分別早于燕山造山帶在中、晚侏羅世末的兩次主造山幕發(fā)生的時(shí)代 ,所以燕山地區主造山幕的 P-T-t演化為逆時(shí)針軌跡。
