Mineral Compositions and Textures of Jadeite Orebody and its Country Rock in Nammaw, Myanmar

Abstract:

This paper studies the mineral compositions and textures of seven rock specimens from jadeite orebody and its country rock in Nammaw, Myanmar through XRD and observation of hand specimens and thin sections. The jadeite orebody is mainly composed of jadeite and minor zeolite minerals. Phlogopite schist and chromite-bearing amphibolite occur between the orebody and its country rock. The country rock is antigorite serpentinite. Outside of serpentinite is schist consisting of chlorite, hastingsite and polylithionite. The specimens of jadeite orebody show mainly following texture types: radiation texture, inequigranular crystalloblastic texture, granular-prismatic crystalloblastic texture, metasomatic texture and mylonitic texture. These textures indicate that the formation of the orebody is related to the intrusion of some fused mass or hydrothermal solution and then the orebody underwent dynamical metamorphism and hydrothermal metamorphism.

• Periodical: Key Engineering Materials (Volumes 512-515)
• Pages: 652-656
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.512-515.652
• Online since: June 2012
• Authors: Hui Xuan Yang, Mei An, Dong Ye, En Dong Zu
• Keywords: Jadeite, Mineral Composition, Nammaw, Texture

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