The Carbonate-Hosted Tullacondra Cu-Ag Deposit, Mallow, Ireland

The Tullacondra Cu-Ag deposit is located on the southern margin of Lower Carboniferous Irish Midlands orefield and contains historical reserves approximately 4.2 Mt at 0.7% Cu 27.5 ppm Ag. hosted within hanging wall a feeder fault, EW-trending Fault, where sulfides sulfosalts containing elevated Cu, Ag, As, Sb deposited, whereas Zn Pb are nearly absent. deposition in took place along bedding bedding-parallel dissolution seams, suggesting an epigenetic mineralization that formed: (a) Transition Series-hosted mineralized zone associated with Sb; (b) Limestone Shale-hosted zone, Cu-dominated depleted other metals, (c) near-vertical fractures related to Fault. Some similarities shared Irish-type Zn-Pb deposits, such as structural stratigraphic controls, feeder-fault proximal zones (such Lisheen Silvermines). Whether was part system or not, our geometry evaluation, whole-rock geochemistry, paragenetic sequence, texture relationships indicate involved reaction metal-bearing fluids carbonate rocks.