The Geochemistry and Geothermometry of Sphalerite in the Carbonate-Hosted Emarat Pb-Zn Deposit

The Mn, Fe, Ni, Co, Cu, Pb, Ga, Ge, Cd, Sn and Ag contents of ۱۰ sphalerite samples from the Emarat Zn-Pb deposit were determined. The principal trace elements are Fe, Cd, Pb, and Mn. The Fe content of the sphalerite ranges from ۱۱۵۸۰ to ۲۱۷۰۰ ppm, the Cd content from ۴۵۲ to ۵۴۹ ppm, the Pb content from ۶۵۲ to ۵۱۸۶ ppm, and the Mn content from <۲ to ۴۹۷ ppm. The Ni, Co, Cu, Ga, Ge, Sn, and Ag contents are low. Trace element geochemistry of sphalerite from the Emarat deposit compares well to literature data reported for classical Mississippi Valley-type (MVT) districts in the world. The Ga/Ge geothermometer indicates a temperature range of ۱۷۵ °C to ۲۳۵ °C for the ore-bearing fluid. This temperature range is consistent again with the ore formation temperatures for MVT deposits. Accordingly, the Emarat Zn-Pb deposit must be classified as an MVT deposit.

Keywords:

Sphalerite , Geochemistry , Geothermometry , Zn-Pb , Emarat