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Muscovite |
Also found in: Wikipedia, Hutchinson | 0.09 sec. |
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muscovite: see mica mica (mī`kə), general term for a large group of minerals, hydrous silicates of aluminum and potassium, often containing magnesium, ..... Click the link for more information. . muscoviteor common mica or potash mica or isinglassAbundant silicate mineral that contains potassium and aluminum and has a layered atomic structure. It is the most common member of the mica group. Because it occurs in thin, transparent sheets, it was used in Russia for window panes and became known as Muscovy glass (isinglass), hence its name. Muscovite is usually colourless but may be light gray, brown, pale green, or rose red. Its low iron content makes it a good electrical and thermal insulator. Muscovite 1. a native or inhabitant of Moscow 2. an archaic word for Russian |
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All three drill holes intersected highly altered mafic volcanic rocks containing ankerite, sericite, fuchsite disseminated pyrite and quartz veins, similar to the lithologies hosting gold in the McEnaney Mine. All three holes intersected intensely altered and sheared zones ranging from 17 to 32 m wide (core length) containing ankerite, sericite, fuchsite disseminated pyrite and quartz veins, suggesting that the mineralized zones may have been intersected. Gold mineralization occurs within a broad deformation - alteration zone (quartz, ankerite, sericite, fuchsite, pyrite) termed the Thibault Horizon, and is located approximately 1 km to the south of the Golden River Deformation Zone. |
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