Abstract
Greisenization does not occur apart from ore bodies associated with the Kounrad granite massif. Primary minerals in granite altered and replaced during greisenization are quartz, feldspars, biotite, sphene, ore minerals, and apatite. Zircon, cyrtolite, and monazite are virtually unaffected by greisenization. Greisen-introduced minerals are muscovite, rutile group minerals, pyrite, fluorite, topaz, and molybdenite. Greisenization of Kounrad granite massif resulted in addition of more material than leached in all levels except at the base of vein zones. The excess of addition over leaching in middle and upper levels is mainly associated with upward migration of material. The value of total and individual factors of addition and leaching depends primarily on original rock composition more so than original porosity and rock structure. --R.M. Hutchinson.
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