[2] Nakhlak Lead Complex has a history of 2500 years which is one of the oldest Underground mines in the country, and lies on the side-line of the Central Desert in Iran.

More modern mining started in the mid-1930s, in co-operation with German and Austrian engineers and geologists like E. Fischer, E. Bohne, G. Ladame and M. Mazcek.

The lead mineralization is situated mainly in the lower part of the Late Cretaceous carbonate rocks at Nakhlak, where sandstones and conglomerates are more common.

The lead greatly predominates over the zinc and silver contents, suggesting a basinal brine origin or fluid release model for the deposit (Rasa, 1987).

The northern and southern flanks, as well as the deeper levels, offer potential supplementary mining possibilities, where even new ore bodies may be found.