在 2 .0 GPa,86 0～ 10 2 0℃ ,加温时间 0 .6 6～ 13.0 7h的条件下 ,粗面玄武岩 -榴辉岩相变初期的石榴子石生长为正常晶体生长。石榴子石粒径随时间而增大 ,其生长速率随粒径增大而减小。界面是控制玄武岩 -榴辉岩相变初期石榴子石生长的主要因素。这一变质作用过程中石榴子石粒径与时间及温度的关系如下 :G2 .4 5=5.6 5× 10 -15t· exp(- 2 7.4 0× 10 3 / RT)式中 G为石榴子石平均粒径 ,t为时间 ,R为气体常数 ,T为绝对温度。这一关系式有助于了解变质作用过程中石榴子石生长动力学 Under the conditions of 2.0 GPa, 86 0-102.0 ℃ and heating time of 0.6-6-13.0 7 h, the growth of garnet in the initial phase of the rough basalt-eclogite was normal crystal growth. The particle size of garnet increases with time, and its growth rate decreases with the increase of particle size. The interface is the main factor controlling the growth of garnet in the initial phase of basaltic-eclogite. The relationship between the particle size of garnet and time and temperature during this metamorphism is as follows: G2 .4 5 = 5.6 5 × 10 -15t · exp (-2.27 × 10 3 / RT) where G is the weight of garnet Average particle size, t is time, R is the gas constant, T is the absolute temperature. This relationship helps to understand the kinetics of garnet growth during metamorphism