Production at the underground mine commenced in September 1999.
The known deposits contain some 14 Mt of zinc metal, approximately.5 of world zinc found to date.
The mine is owned by Lundin Mining, and casino sydney poker tournament operated by Lundins wholly-owned subsidiary, Galmoy Mines Ltd.
Groves and Muhling., 1998.The G orebody is a classic Irish type deposit and occurs in the hanging wall of a major northeast fault, the G Fault.Total production (LOM 1977 to end 2005,.1Mt grading.37 Zn and.02.Weathered equivalents form anglesite, cerussite, smithsonite, hydrozincite and secondary galena and sphalerite within the supergene zone.Also, a more recent discovery adjacent to the CW Zone at Galmoy (the R Zone) will add significantly to the mine life.Favourable Geology Ireland is fortunate in having a widespread carbonate succession that has proved a favourable host.At dolomitization seems widespread, with a hydrothermal ore- Navan the mineralization occurs as stacked stratabound related phase prominent at Silvermines, Galmoy and lenses, while the Waulsortian-hosted deposits have a variety of Lisheen.This was the discovery of the Galmoy deposit (6.2Mt,.31 Zn,.12 Pb) by a junior Irish Company, Conroy Petroleum and Natural Resources.

Similarly, irish-type carbonate lead-zinc ores, exemplified by, lisheen Mine.Two separate sulphide orebodies occur approximately 70m below surface and are hosted in basal Waulsortian (Lower Carboniferous) Reef mudbank limestones.Since 1960 Ireland has had a string of significant zinc-lead discoveries, placing it firmly on the world stage as a country with proved prime zinc-lead territory.Towards a genetic model for MVT Pb-Zn deposits 20, genetic Model for MVT Deposits, oil and then brine released from clastic sedimentary basin Dissolution of reefal limestone creates porosity (Karst) Oil leaves residues in limestone Basinal brine leaches Pb, Zn from sandstones, shales Basinal brine.Relevant data sources include: Paper geological maps at various scales.The earliest evidence of mining is provided by Bronze Age.At the end of 2004 (the latest date for which figures are available Taras jorc Classified Ore Reserves for the entire orebody amounted.3Mt.7 Zn and.9 Pb with an additional.2Mt of Mineral Resources grading.2 Zn and.1.A fore-reef/back-reef transition is the 'sweet spot and thus depending on the age of the carbonate sequence, familiarity with coral palaeontology is considered essential.
This classification of ore deposits is also known.

Deposit, yEAR OF discovery, tonnage (Mt grade (ZnPb) * Economic * Tynagh Courtbrown Keel * Silvermines Ballinalack * Navan Tatestown/ Scallanstown Harberton Bridge Garrycam.