Figure 4. Comparison of composition of Fresnillo brines (excluding type 3 low salinity fluids) with a variety of magmatic brines from other hydrothermal ore deposits.

Oxidized porphyry copper deposit trend incorporates brine inclusion data from Bajo de la Alumbrera³⁶, Bingham²¹, El Teniente³⁷ and Butte³⁸. Mole Granite brine inclusion data (Leno 1 sample) from Audétat et al.²⁰. Zinc skarn fluid inclusion data (average of garnet- and pyroxene-hosted inclusions) from Williams-Jones et al.³⁰. Taupo Volcanic Zone fluid data from Simmons and Brown⁵.