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K–Ar ages of clay concentrates from Irish orebodies and their bearing on the timing of mineralisation

Published online by Cambridge University Press:  03 November 2011

A. N. Halliday  and
J. G. Mitchell
A. N. Halliday
Affiliation:
Isotope Geology Unit, Scottish Universities Research and Reactor Centre, East Kilbride, Glasgow G75 0QU, Scotland.
J. G. Mitchell
Affiliation:
School of Physics, The University, Newcastle-upon-Tyne NE1 7RU, England.
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Abstract

The K–Ar ages of 117 clay concentrates from samples associated with mineral deposits in Ireland indicate that most, if not all of the major ore deposits were formed during Carboniferous times or earlier. The Avoca orebodies are pre-400 Ma in age. Many of the vein deposits traversing Palaeozoic rocks were either formed or rejuvenated during the Hercynian orogeny c. 300 Ma ago. The SW Ireland Cu–Ba ores are 290 Ma old, and the major, frequently stratiform, base metal deposits stratabound in the Lower Carboniferous were, at least largely, formed during the Carboniferous period. In the case of the Navan orebody, an early Carboniferous age is indicated. Previous models invoking major mineralisations during Mesozoic or Tertiary times are rendered invalid. However, in some areas there appears to have been hydrothermal activity during the Triassic and possibly the Permian. The Triassic event is thought to be genetically related to coeval hydrothermal avtivity found throughout the N Atlantic regions. The data suggest that probably <10 km of cover has been removed from the majority of Ireland since Lower Carboniferous times. K–Ar dating of clays is shown to be a powerful method for constraining the ages of oredeposits.

Keywords

CarboniferousHercynianhydrothermalIrelandK–Ar datingmineral depositPermianstrataboundTriassicvein.
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 74 , Issue 1 , 1983 , pp. 1 - 14
Copyright
Copyright © Royal Society of Edinburgh 1983

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References

8. References

Andrew, C. J. & Ashton, J. H. 1982. Mineral textures; metal zoning and ore environment of the Navan orebody, Co. Meath, Ireland. In Mineral exploration in Ireland, progress and development 71–81, 35–46. Dublin: Irish Association of Economic Geologists.Google Scholar
Badham, J. P. N. 1978. Slumped sulphide deposits at Avoca, Ireland, and their significance. TRANS INST MIN METALL 87B, B21–6.Google Scholar
Barrett, J. R. 1975. Genesis of the Ballynoe barite deposit, Ireland, and other stratabound barite deposits. Unpublished Ph.D. Thesis, London University.Google Scholar
Boast, A. M., Swainbank, I. G., Coleman, M. L. & Halls, C. 1981. Lead isotope variation in the Tynagh, Silvermines and Navan base-metal deposits, Ireland. TRANS INST MIN METALL 90B, B115–9.Google Scholar
Bonhomme, M. G. 1982. The use of Rb–Sr and K–Ar methods as a stratigraphie tool applied to sedimentary rocks and minerals. PRECAMBRIAN RES 18, 5–25.CrossRefGoogle Scholar
Brown, P. E., Miller, J. A. & Grasty, R. L. 1968. Isotopie ages of late Caledonian granitic intrusions in the British Isles. PROC YORKS GEOL SOC 36, 251–76.CrossRefGoogle Scholar
Byrne, B., Downing, D. & Romer, D. 1971. Some aspects of the genesis of the zinc-lead orebody at Navan. In The genesis of base metal deposits in Ireland. Dublin: Irish Geological Association.Google Scholar
Cameron, D. E. & Romer, D. M. 1970. Denison copper-silver deposit at Aherlow, County Limerick, Ireland. TRANS INST MIN METALL 79B, B171–3.Google Scholar
Charlesworth, J. K. 1963. Historical geology of Ireland. London: Oliver & Boyd.Google Scholar
Clauer, N. 1981. Rb–Sr and K–Ar dating of Precambrian clays and glauconites. PRECAMBRIAN RES 15, 331–52.CrossRefGoogle Scholar
Cole, G. A. J. 1922. Memoir and map of localities of minerals of economic importance and metalliferous mines in Ireland. MEM GEOL SURV IREL (reprinted 1956).Google Scholar
Coomer, P. G. & Robinson, B. W. 1976. Sulphur and sulphate-oxygen isotopes and the origin of the Silvermines deposits, Ireland. MINER DEPOSITA 11, 155–69.CrossRefGoogle Scholar
Derry, D. R., Clark, G. R. & Gillat, N. 1965. The Northgate base-metal deposit at Tynagh, County Galway. Ireland: a preliminary study. ECON GEOL 60, 1218–37.CrossRefGoogle Scholar
Dunham, K.C., Dunham, A. C., Hodge, B. L. & Johnson, G. A.L. 1965. Granite beneath Visean sediments with mineralisation at Rookhope, Northern Pennines. Q J GEOL SOC LONDON 121, 383–417.CrossRefGoogle Scholar
Dunham, K.C., Fitch, F. J., Ineson, P. R., Miller, J. A. & Mitchell, J. G. 1968. The geochronological significance of Argon 40/Argon 39 age determinations on White Whin from the northern Pennine orefield. PROC R SOC LONDON 307A, 251–66.Google Scholar
Egan, F. W. 1977. Including the districts of Newton Hamilton, Keady and Castleblayney (Sheet 59). MEM GEOL SURV IREL.Google Scholar
Evans, A. M. 1977. Genesis of Irish base metal deposits. In Wolf, K. H. (ed.) Handbook of stratabound and stratiform ore deposits 5, 231–54. Amsterdam: Elsevier.Google Scholar
Finlayson, A. M. 1910. The metallogeny of the British Isles. Q J GEOL SOC LONDON 66, 281–96.CrossRefGoogle Scholar
Fowler, A. 1959. The non-ferrous minerals of Northern Ireland. In The future of non-ferrous mining in Great Britain and Ireland, 27–34. London: Institution of Mining & Metallurgy.Google Scholar
Greig, J. A., Baadsgaard, H., Cumming, G. L., Folinsbee, R. E., Krouse, H. R., Ohmoto, H., Sasaki, A. & Smejkal, V. 1971. Lead and sulphur isotopes of the Irish base metal mines in Carboniferous carbonate host rocks. In Takeuchi, Y. (ed.) Geochemistry and crystallography of sulphide minerals in hydrothermal deposits, 84–92. SOC MIN GEOL JAPAN SPEC ISSUE 2.Google Scholar
Greenan, E. 1979. Ballynoe barite deposit. In Brown, A. (ed.) Excursion handbook: Prospecting in areas of glaciated terrain, 66–72. Dublin: Irish Association of Economic Geologists.Google Scholar
Halliday, A. N. 1977. K–Ar dating of mineralisation episodes–a discussion. ECON GEOL 72, 870–1.CrossRefGoogle Scholar
Halliday, A. N. 1978. 40Ar–39Ar stepheating studies of clay concentrates from Irish orebodies. GEOCHIM COSMOCHIM ACTA 42, 1851–8.CrossRefGoogle Scholar
Halliday, A. N. 1980. The timing of early and main stage ore mineralisation in south west Cornwall. ECON GEOL 75, 752–9.CrossRefGoogle Scholar
Halliday, A. N. & Mitchell, J. G. 1976a. Preliminary isotopie age determinations from the St Just mining district (Abstract). PROC USSHER SOC 3, 426.Google Scholar
Halliday, A. N. & Mitchell, J. G. 1976b. Structural, K–Ar and 40Ar–39Ar age studies of adulara K-feldspars from the Lizard Complex, England. EARTH PLANET SCI LETT 29, 227–37.CrossRefGoogle Scholar
Hallissy, T. 1914. Co of Armagh, Fermanagh and Monaghan (Sheet 58). MEM GEOL SURV IREL (2nd edn).Google Scholar
Hallissy, T. 1923. Barytes in Ireland. MEM GEOL SURV IREL.Google Scholar
Hutchings, J. 1979. The Tynagh deposit. In Brown, A. (ed) Excursion Handbook: Prospecting in areas of glaciated terrain, 34–46. Dublin: Irish Association of Economic Geologists.Google Scholar
Ineson, P. R. & Mitchell, J. G. 1972. Isotopie age determinations on clay minerals from lavas and tuffs of Derbyshire orefield. GEOL MAG 109, 501–12.CrossRefGoogle Scholar
Ineson, P. R. & Mitchell, J. G. 1974. K–Ar isotopie age determinations from some Lake District mineral localities. GEOL MAG 111, 521–37.CrossRefGoogle Scholar
Ineson, P. R. & Mitchell, J. G. 1975. K–Ar isotopie age determinations from some Welsh mineral localities. TRANS INST MIN METALL 84B, B7–16.Google Scholar
Jackson, N. J., Halliday, A. N., Sheppard, S. M. F. & Mitchell, J. G. 1982. Hydrothermal activity in the St Just mining district, Cornwall, England. In Evans, A. M. (ed.) Metallization associated with acid magmatism, 137–79. New York: Wiley.Google Scholar
Jones, G. V. & Bradfer, N. 1982. The Ballinalack zinc–lead deposit, Co. Westmeath, Ireland. In Mineral exploration in Ireland, progress and development 71–81, 47–62. Dublin: Irish Association of Economic Geologists.Google Scholar
Kennan, P. S. 1974. The petrography of some red-feldspar pegmatites and their association with late hydrothermal changes in the Leinster granite. SCI PROC R DUBLIN SOC 5A, 77–84.Google Scholar
Kent, P. E. 1975. The tectonic development of Great Britain and the surrounding areas. In Woodland, A. W. (ed.) Petroleum and the continental shelf of north-west Europe 1 Geology, 1–28. Barking: Applied Science Publishers.Google Scholar
Larter, R. C. L., Boyce, A. J. & Russell, M. J. 1981. Hydrothermal pyrite chimneys from the Ballynoe barite deposit, Silver-mines, County Tipperary, Ireland. MINER DEPOSITA 16, 309–18.CrossRefGoogle Scholar
Mitchell, J. G. 1972. Potassium-Argon ages from Cheviot Hills, northern England. GEOL MAG 109, 421–26.CrossRefGoogle Scholar
Mitchell, J. G. & Halliday, A. N. 1976. The extent of Triassic/Jurassic hydrothermal ore deposits on the North Atlantic margins. TRANS INST MIN METALL 85B, B159–61.Google Scholar
Mitchell, R. H. & Krouse, H. R. 1971. Isotopie composition of sulphur and lead in galena from the Greenhow-Skyreholme area, Yorkshire, England. ECON GEOL 66, 243–51.CrossRefGoogle Scholar
Moorbath, S. 1962. Lead isotope abundance studies on mineral occurrences in the British Isles and their geological significance. PHIL TRANS R SOC LONDON 254A, 295–360.Google Scholar
Moore, J. McM. 1975. Fault tectonics at Tynagh mine, Ireland. TRANS INST MIN METALL 84B, B141–9.Google Scholar
Morrissey, C. J., Davis, G. R. & Steed, G. M. 1971. Mineralisation in the Lower Carboniferous of central Ireland. TRANS INST MIN METALL 80B, B174–85.Google Scholar
O'Brien, M. V. 1959. The future of non-ferrous mining in Ireland. In The future of non-ferrous mining in Great Britain and Ireland, 5–26. London: Institution of Mining & Metallurgy.Google Scholar
O'Brien, M. V. & Romer, D. M. 1971. Tara geologists describe Navan discovery. WORLD MIN 24 (6), 38–9.Google Scholar
Patterson, J. M. 1971. The Keel, Co. Longford, zinc-lead-cadmium deposit. In The genesis of base metal deposits in Ireland. Dublin: Irish Geological Association.Google Scholar
Pereira, J. 1963. Further reflections on ore genesis and exploration. MINERAL MAG 109, 265–80.Google Scholar
Platt, J. W. 1971. The genesis of the Avoca ores. In The genesis of base metal deposits in Ireland. Dublin: Irish Geological Association.Google Scholar
Platt, J. W. 1977. Volcanogenic mineralisation at Avoca, Co. Wicklow, Ireland, and its regional implications. In Volcanic processes in ore genesis, 163–70. London: Institution of Mining & Metallurgy and Geological Society of London.Google Scholar
Pockley, R. P. C. 1961. Lead isotope and age studies of uranium and lead minerals from the British Isles and France. Unpublished Ph.D. Thesis, Oxford University.Google Scholar
Pointon, C. R. & Ixer, R. A. 1980. Parys Mountain mineral deposit, Anglesey, Wales: geology and ore mineralogy. TRANS INST MIN METALL 89B, B143–55.Google Scholar
Rhoden, H. N. 1958. Structure and economic mineralisation of the Silvermines district. County Tipperary, Eire. TRANS INST MIN METALL 68, 67–94.Google Scholar
Rhoden, H. N. 1959a. Mineralogy of the Silvermines district, Tipperary, Eire. MINERAL MAG 32, 128–39.Google Scholar
Rhoden, H. N. 1959b. Discussion of papers by O'Brien, M. V., The future of non-ferrous mining in Ireland, and Fowler, A., The non-ferrous minerals of Northern Ireland. In The future of non-ferrous mining in Great Britain and Ireland, 43–4. London: Institution of Mining & Metallurgy.Google Scholar
Riedel, D. 1980. Ore structures and genesis of the lead–zinc-deposit Tynagh, Ireland. GEOL RUNDSCH 69, 361–83.CrossRefGoogle Scholar
Russell, M. J. 1968. Structural controls of base metal mineralisation in Ireland in relation to continental drift. TRANS INST MIN METALL 77B, B117–28.Google Scholar
Russell, M. J. 1974. Manganese halo surrounding the Tynagh ore deposit, Ireland: a preliminary note. TRANS INST MIN METALL 83B, B65–6.Google Scholar
Russell, M. J. 1975. Lithogeochemical environment of the Tynagh base metal deposit, Ireland and its bearing on ore deposition. TRANS INST MIN METALL 84B, B128–33.Google Scholar
Russell, M. J. 1976. Incipient plate separation and possible related mineralisation in lands bordering the North Atlantic. SPEC PAP GEOL ASSOC CAN 14, 339–49.Google Scholar
Russell, M. J. 1978. Downward-excavating hydrothermal cells and Irish-type ore deposits: importance of an underlying thick Caledonian prism. TRANS INST MIN METALL 87B, B168–71.Google Scholar
Russell, M. J., Solomon, M. & Walshe, J. L., 1981a. Mechanisms of sulphide deposition in sediment-hosted exhalative lead-zinc deposits. B M R J AUST GEOL GEOPHYS 4, 329–30.Google Scholar
Russell, M. J., Solomon, M. & Walshe, J. L. 1981b. The genesis of sediment-hosted, exhalative zinc + lead deposits. MINER DEPOSITA 16, 113–27.CrossRefGoogle Scholar
Samson, I. M., & Russell, M. J., 1983. Fluid inclusion data for the Silvermines base metal and barite deposits, Ireland. TRANS INST MIN METALL 92B, in press.Google Scholar
Schultz, R. W., 1966a. Lower Carboniferous cherty ironstones at Tynagh, Ireland. ECON GEOL 61, 311–42.CrossRefGoogle Scholar
Schultz, R. W., 1966b. The Northgate base-metal deposit at Tynagh, County Galway, Ireland. ECON GEOL 61, 1443–9.Google Scholar
Shepherd, T. J., Beckinsale, R. D., Rundle, C. C., & Dunham, J. 1976. Genesis of Carrock Fell tungsten deposits, Cumbria: fluid inclusion and isotopic study. TRANS INST MIN METALL 85B, B63–73.Google Scholar
Sheppard, W. A., 1980. The ores and host rock geology of the Avoca Mines, Co. Wicklow, Ireland. NORGES GEOL UNDERS 360, 269–83.Google Scholar
Sheridan, D. J. R. 1964. The structure and mineralisation of the Mountain Mine area, Allihies, West Co. Cork, Ireland. SCI PROC R DUBLIN SOC 2A, 21–7.Google Scholar
Steed, G. M., 1974. The geological setting of the Gortdrum deposit, Ireland. In Mineral Exploitation and Economic Geology, 1–16, Cardiff: University College of Wales.Google Scholar
Steiger, R. H., äger, E. 1977. Sub-commission on Geochronology: convention on the use of decay constants in geo- and cosmo-chronology. EARTH PLANET SCI LETT 36, 359–62.CrossRefGoogle Scholar
Taylor, S. –24.Google Scholar
Thompson, I. S., 1967. The discovery of the Gortdrum deposit, Co. Tipperary, Ireland. TRANS CAN INST MIN METALL 70, 85–92.Google Scholar
Tremlett, W. E., 1959. The structure of the Lower Palaeozoic rocks of the Arklow district. Q J GEOL SOC LONDON 115, 17–40.CrossRefGoogle Scholar
Tyler, P. 1979. The Gortdrum deposit. In Brown, A. (ed.) Excursion handbook: Prospecting in areas of glaciated terrain, 73–81. Dublin: Irish Association of Economic Geologists.Google Scholar
Wells, P. R. S. & Richardson, S. W., 1979. Thermal evolution of metamorphic rocks in the Central Highlands of Scotland. In Harris, A. I., Holland, C. H., & Leake, B. E., (eds) Caledonides of the British Isles—reviewed. SPEC PUBL GEOL SOC LOND 8, 339–44.Google Scholar
Wheatley, C. J. V. 1971. Aspects of metallogenesis within the southern Caledonides of Great Britain and Ireland. TRANS INST MIN METALL 80B, B211–23.Google Scholar
Wright, W. B., Cole, G. A. J. & Hallissy, T. 1927. The geology of Killarney and Kenmore (Sheets 173 & 184). MEM GEOL SURV IREL.Google Scholar