History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c12.s1.t6.1

v1.c12.s1.t6.1

Ancient mines at Zawar are found both opencast and underground. A rough and conservative calculation suggests that perhaps 250000 tonnes of zinc concentrates were extracted from some 2.5 million tonnes of ore in the total mined area, before modern mining commenced. Fig.7 shows a plan of the old workings at Zawarmala mine and Fig 8 presents a view of an ancient stope (Willies, 1987).