Unique Interstitial Textures within Coarse-Grained Jadeitite from Kazakhstan and Their Significance in Locality Identification

Unique finer-grained interstitial textures, occurring as small blocks or irregular shapes of 0.15–10 mm, were found merging in the coarse-grained textures Kazakhstan jadeitite. According to mineral content, texture could be classified into two types: Type I, consisting almost all jadeite crystals, minor omphacite, and little analcime, II, comprising mainly omphacite with crystals. They both showed no obvious preferred orientation have distinct boundaries but appear more transparent, finer grain sizes higher degrees idiomorphism. The include granitoid radial clusters. formed by euhedral subhedral prismatic grains usually show rhythmic zoning patterns parallel intergrowths. Furthermore, fluid inclusions contain H2O CH4, it was supposed that precipitation jadeitic fluids. However, perhaps due insufficient supply fluids sufficient space, some interspaces left among coarser-grained Afterward, these filled successor H2O-richer under a different P–T condition from former jadeitite, consequently, kinds formed. Such seem only therefore serve typical visual identification feature