한국광물학회지 (Journal of the Mineralogical Society of Korea)
- 제11권2호
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- Pages.85-96
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- 1998
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- 1225-309X(pISSN)
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- 2288-7172(eISSN)
경북 양북지역산 견운모광석의 물성 및 부존산상
A Study o the Geological Occurrence, the Mineralogical and Physico-chemical Properties of the Sericite Ore from the Yangbuk Area, Kyungsangbuk-do
초록
The sericite ore is formed by the hydrothermal alteration of rhyodacitic welded tuff. The alteration zone of the host rock can be classified into four types based on the mineral assemblages ; sericite, quartz-sericite, silicified and propylite zone. The sericite ore mainly occurs as vein types and fault clay along the fault plane in the quartz-sericite zone. Mineral components of the sericite ore are mainly sericite with minor diaspore, corundum and pyrite. The sericitic porcelaineous ore is mainly composed of quartz and sericite. Accessory minerals are muscovite, diaspore, sphene, corundum, pyrite, iron-oxides and etc. The chemical compositions of K2O, Al2O3, and ignition loss in the sericite ore increase largely than that of the host rock, while the compositions of SiO2, Na2O and Fe2O3 decrease. XRD patterns of the heat-treated sericite ores show the formation of mullite at
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