ScholarWorks@경상국립대학교

초록

The mineral brianyoungite, a hydroxyl Zn carbonate, was found for the first time in the Gukjeon mine, and its occurrence, mineralogical-geochemical characteristics, and formation environment were studied. The brianyoungite forms spherulitic-rosette aggregate composed of platy-to-bladed particles and is closely accompanied by gypsum and bechererite. The X-ray diffraction analysis results indicate that the brianyoungite in Gukjeon mine is monoclinic with beta very close to 90 degrees. Thermal analysis showed the 6 stage of weight loss due to the dehydration, dehydroxylation, carbonate decomposition and sulfate decomposition. The mineral shows characteristic Raman bands due to Zn, CO32-, SO42- and (OH)(-). The empirical formula is Zn-3(.5)(CO3, SO4)(2.7)(OH)(4). The brianyoungite in the Gukjeon mine might be secondary mineral formed by the reaction of sphalerite with CO3-containing water on the surface. Additional report of brianyoungite are expected after further research on closed or abandoned domestic Zn mines.

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