Gold Occurences in Ireland

Southeast Ireland

Gold in Lower Palaeozoic rocks of southeast Ireland is associated with both volcanogenic massive sulphide mineralization in Co. Wicklow and metasedimentary and metavolcanic sequences in Co. Wexford.  IMC Exploration is presently focusing on the gold potential of this region.  Drilling in Ordovician metasediments at Kilmacoo, adjacent to Avoca, has confirmed the existence of significant bedrock gold.  The presence of some 0.4 Mt grading 1.5 to 2 g/t Au over a strike length of 125 m is indicated.

West of Ireland

In Lower Palaeozoic rocks of south Co. Mayo in the west of Ireland, gold is found in quartz veins at Lecanvey and also in the major E – W Cregganbaun shear zone.  The latter traverses tuffs and metasediments of Ordovician age, with gold known at many localities along its 33 km length following the discovery of bedrock gold in 1988.  Drilling near the western end of the shear zone has indicated the existence of 0.53 Mt grading 6 g/t Au to a depth of 80 m.
At Bohaun, northwest of Galway, visible gold with consistent values of 40 to 190 g/t Au over widths of up to one metre have been found in a silicified breccia in Silurian metasediments.  In the same area, an intersection of 0.17 oz/t (5.29 g/t) Au over 4.6 m was drilled in massive pyrrhotite-bearing amphibolite pods in a volcano-sedimentary sequence.
In 1998 at the western end of the Dooros Peninsula and 2 km ESE of Cornamona village, Ennex reported the discovery of a 914 m zone containing anomalous gold values.  Trenching identified seven bedrock copper-gold occurrences, with the best showing having 37 m of strike length and averaging 1.1% copper, 0.20 ounces/ton  Au (6.22 g/tonne).  Five occurrences were drilled and all holes intersected mineralization over narrow widths.

County Monaghan

At Clontibret in Co. Monaghan, gold is found associated with arsenopyrite-stibnite veining in Lower Palaeozoic greywackes.  An indicated resource of 11 M tonnes grading 1.24 g/t gold for 440,000 oz (13,686 kg) contained, and an inferred resource of 14 M tonnes at a grade of 1.32 g/t for 590,000 oz (18,351 kg) contained have been calculated, bringing the total resource to date to over 1 million ounces (31,103 kg).  Significant gold mineralization occurring in a sequence of argillites and arenites with quartz stockwork has recently been discovered in an ongoing drilling programme north east of Clontibret at Clay Lake, in Co. Armagh, with 14 metres of 0.72 g/t gold, including 2 metres of 1.72 g/t gold reported.  Source:

County Kildare

In Co. Kildare the 1993 discovery of visible gold in quartz float, southwest of Dublin, has stimulated interest in this new target area of Lower Palaeozoic greywackes.  A number of auriferous shear zones were intersected by drilling, the best being 1.3 m of 3.33 g/t Au at 52 m depth.

Northern Ireland

Recent exploration has indicated the presence of bedrock gold in a number of different geological terrains.  The discovery of gold deposits at Curraghinalt in Co. Tyrone in 1982 and Cavanacaw in 1987 resulted in an upsurge of gold exploration in the 1980s.  Attention has largely been focused on vein-hosted quartz veins and shear zone targets in Dalradian (Precambrian) metasediments.  The most recent resource estimate at Cavanacaw in the measured and indicated category amounts to a total of 0.428 Mt grading 6.69 g/t for 92,000 ounces (2,862 kg).  Source:
At Curraghinalt, an indicated mineral resource of 0.95 Mt grading 13.24 g/t gold for approximately 400,000 contained ounces (12,441 kg) and an inferred mineral resource of 2.46 Mt grading 14.64 g/t gold for 1.16 million contained ounces (36,080 kg) has been estimated.  Source:

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