Keketuohai No. 3 Pegmatite Deposit, Xinjiang
Reference work entry
This is a large rare earth element-bearing granite pegmatite ore bed containing lithium, rubidium, caesium, beryllium, niobium and tantalum in a Hercynian hornblende gabbro rock mass. It is located in Keketuohai, Fuyun County, Xinjiang Province. Twenty-five granite pegmatite veins have been found in this area, six of which contain rare earth element reserves. The Keketuohai No. 3 pegmatite deposit is the largest and the most typical granite pegmatite vein; it is 2,250 m long, 1,500 m wide and 20–60 m thick. There are nine zones from the edge to the centre, namely, (1) a graphic-textured and deformed graphic-textured quartz microcline zone, (2) a sugar-crystal albite nest zone (mainly containing beryllium ore), (3) a plagioclase block zone, (4) a muscovite-quartz aggregate zone, (5) spheroidal albite-spodumene zones (lithium-bearing belts containing beryllium and niobium), (6) a quartz-spodumene zone (combined with (5) to form a beryllium-tantalum-niobium lithium host ore), (7) a...
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