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Table 4 Cassiterite reserve in Nigeria from 1972 to 1977 (metric tonnes)

From: Benefits of cassiterite mining by artisanal miners in Jos Plateau, Nigeria

Company 1972 1973 1974 1975 1976 1977 Latest reserve position
ATMNLTD. 44,436 45,172 49,165 48,165 48,840 49,313
31 March 1978
Ex-lands Nig.Ltd. 3283 2964 2969 2722 3054 2953 2953, 31 December 1977
Kaduna Prospecting Nig.Ltd. 2300 2330 2820 3083 3087 2596 3004, 31 December 1977
Gold and Base Metal Mines of Nig.Ltd. 2292 2190 2291 2269 2510 2260 2260, 31 December 1977
Bisichi-JentarNig.Ltd. 11,638 11,638, 31 December 1977