Niobium - a critical metal to decarbonize our world.
Автор: Mining Life Online
Загружено: 2022-07-02
Просмотров: 175
A pyrochlore mineralization is contained in an intrusive complex of pyroxene-rich carbonatites dating from the Huronian Orogen and generally orientated north south. Intrusions of hornblende gneiss abut the complex on its east and west sides. The general dip is sub-vertical, orientated slightly to the east. Paleozoic sediments consisting of altered, silty, sandy, argillaceous sandstones discordantly cover the carbonatite complex. These sandstones vary in thickness from 12 to 30 meters, and lie horizontally over the carbonatites, covering them completely. Unconsolidated silty glacial sediments between 6 and 10 meters deep cover these sandstones, and are themselves covered by spongy peat (muskeg) 1 to 2 meters deep.
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