Galmoy Mine is an abandoned

zinc Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodi ...

and

lead Lead is a chemical element with the symbol Pb (from the Latin ) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cu ...

mine northwest of Kilkenny,

Ireland Ireland ( ; ga, Éire ; Ulster Scots dialect, Ulster-Scots: ) is an island in the Atlantic Ocean, North Atlantic Ocean, in Northwestern Europe, north-western Europe. It is separated from Great Britain to its east by the North Channel (Grea ...

. Located in the Rathdowney Trend, Galmoy was an underground mine that operated from 1997 to 2012, initially by Arcon International Resources, then by Lundin Mining from 2005. The Rathdowney Trend stretches , between the towns of

Abbeyleix Abbeyleix (; ) is a town in County Laois, Ireland, located around south of the county town of Portlaoise. Abbeyleix was formerly located on the N8, the main road from Dublin to Cork. At one point, up to 15,000 vehicles passed along the town' ...

and

Thurles Thurles (; ''Durlas Éile'') is a town in County Tipperary, Ireland. It is located in the civil parish of the same name in the barony of Eliogarty and in the ecclesiastical parish of Thurles. The cathedral church of the Roman Catholic Arc ...

. The region is a broad plain drained by the Rossetown and Drish Rivers, tributaries of the

River Suir The River Suir ( ; ga, an tSiúr or ''Abhainn na Siúire'' ) is a river in Ireland that flows into the Atlantic Ocean through Waterford after a distance of . The catchment area of the Suir is 3,610 km2.

, which flows into the sea at

Waterford "Waterford remains the untaken city" , mapsize = 220px , pushpin_map = Ireland#Europe , pushpin_map_caption = Location within Ireland##Location within Europe , pushpin_relief = 1 , coordinates ...

. Exploration of the Rathdowney Trend during the late 1960s and early 1970s identified sporadic occurrences of lead and zinc, although the first significant mineralisation was not discovered until 1984.

Lisheen Mine Lisheen Mine is a former lead-zinc-silver mine located between the villages of Moyne and Templetuohy in County Tipperary, Ireland. In the Rathdowney Trend, Lisheen was an underground mine where the Lisheen deposit lies at an average depth of 170 ...

is also in the Rathdowney Trend. Galmoy was exclusively an underground operation. Initially the mine used room and pillar methods exclusively, but subsequent modifications introduced both

benching Birkat Hamazon ( he, בִּרְכַּת הַמָּזוׂן, The Blessing of the Food), known in English as the Grace After Meals ( yi, ; translit. ''bentschen'' or "to bless", Yinglish: Bentsching), is a set of Hebrew blessings that Jewish ...

and drift and fill systems where conditions are appropriate, as a means of maximising ore recoveries. At the same time, the mining method was designed to ensure that no waste rock needed to be hauled to the surface. Concentrates were transported by truck to New Ross port, County Wexford, about away, and loaded onto ships for transport to smelters, located mainly in Europe. A miner was killed in an accident in 2007. In 2008 workers at Galmoy Mines were told the mine was to close completely on a phased basis by July 2011, due to dwindling zinc resources at Galmoy and a drop in the price for metal worldwide. Production from the mine ceased in May 2009. Some ore remained unmined and plans were being formulated to recover of some or all of this ore. The mine finally closed in 2012.

Geology

The Galmoy ore bodies are

breccia Breccia () is a rock composed of large angular broken fragments of minerals or rocks cemented together by a fine-grained matrix. The word has its origins in the Italian language, in which it means "rubble". A breccia may have a variety of ...

-hosted, generally stratabound lenses of predominantly massive

sulphides Sulfide (British English also sulphide) is an inorganic anion of sulfur with the chemical formula S2− or a compound containing one or more S2− ions. Solutions of sulfide salts are corrosive. ''Sulfide'' also refers to chemical compounds lar ...

consisting of sphalerite,

argentiferous galena Galena, also called lead glance, is the natural mineral form of lead(II) sulfide (PbS). It is the most important ore of lead and an important source of silver. Galena is one of the most abundant and widely distributed sulfide minerals. It cry ...

and

pyrite The mineral pyrite (), or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula Fe S2 (iron (II) disulfide). Pyrite is the most abundant sulfide mineral. Pyrite's metallic luster and pale brass-yellow hue giv ...

marcasite The mineral marcasite, sometimes called “white iron pyrite”, is iron sulfide (FeS2) with orthorhombic crystal structure. It is physically and crystallographically distinct from pyrite, which is iron sulfide with cubic crystal structure. Both ...

in varying combinations. Hosted in

Lower Carboniferous Lower may refer to: *Lower (surname) *Lower Township, New Jersey *Lower Receiver (firearms) *Lower Wick Gloucestershire, England See also *Nizhny Nizhny (russian: Ни́жний; masculine), Nizhnyaya (; feminine), or Nizhneye (russian: Ни́� ...

rocks, they occur at the junction of an argillaceous

bioclastic Bioclasts are skeletal fossil fragments of once living marine or land organisms that are found in sedimentary rocks laid down in a marine environment—especially limestone varieties around the globe. some of which take on distinct textures and col ...

limestone Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms whe ...

beneath dolomitised Waulsortian limestone.

References

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