17:15 〜 18:45
[SMP24-P21] ヒールドマイクロクラックの流体包有物の成長時間
キーワード：流体包有物、ヒールドマイクロクラック、包有物成長、焼結時間
There are abundant fluid inclusions in the grains formed by various geological processes such as ore formation, metasomatism, metamorphism, consolidation of sediments, and recrystallization in the mylonitic and cata-clastic process. Fluid inclusion is a simple system composed of fluid with tiny crystals and bubble and surrounding single crystal. On the other hand, there are some varieties of fluid domain in rocks; for examples, dislocation loop formed by collapse of vacancy cluster, nanopore, grain boundary lens, and dislocation core with large Burger’s vector. These are very small in size, although fluid inclusion has a wide range in size from several nano meter to millimeter.
Because the fluid inclusion itself in the single crystalline host is obviously isotropic, the boundary between the fluid and surrounding crystalline material must be anisotropic depending upon the lattice structure of the crystal, thereby showing that the interfacial energy of the boundary is estimated by surface integral of the local interfacial energy. Therefore, if the fluid inclusion-host single crystal system attains enough equilibrium state, the shape of fluid inclusion should appear the euhedral (negative crystal) and surrounded by singular surfaces of host crystal. However, many fluid inclusions display the rounded to irregular outline, except for those in the high- grade metamorphic rocks such as granulite facies rocks. Thus, it shows that many fluid inclusions should record a medium state of shape transformation process. In this paper, the author will discuss the stable shape of inclusions and the growth equation of them during annealing.
Because the fluid inclusion itself in the single crystalline host is obviously isotropic, the boundary between the fluid and surrounding crystalline material must be anisotropic depending upon the lattice structure of the crystal, thereby showing that the interfacial energy of the boundary is estimated by surface integral of the local interfacial energy. Therefore, if the fluid inclusion-host single crystal system attains enough equilibrium state, the shape of fluid inclusion should appear the euhedral (negative crystal) and surrounded by singular surfaces of host crystal. However, many fluid inclusions display the rounded to irregular outline, except for those in the high- grade metamorphic rocks such as granulite facies rocks. Thus, it shows that many fluid inclusions should record a medium state of shape transformation process. In this paper, the author will discuss the stable shape of inclusions and the growth equation of them during annealing.