Re-Os geochronology and fluid inclusion microthermometry of molybdenite mineralisation in the late-Caledonian Omey Granite, western Ireland

Transactions of the Institutions of Mining and Metallurgy, Section B: Applied Earth Science

Volumn 116, Issue 3, 2007, Pages 143-149

  Feely, Martin ^a   Selby, D ^b   Conliffe, J ^a   Judge, M ^c  

^a NATIONAL UNIVERSITY OF IRELAND   (Ireland)

^b DURHAM UNIVERSITY   (United Kingdom)

^c Galmoy Mines Ltd   (Ireland)

Author keywords

Appalachian Caledonian Orogen; Connemara; Fluid inclusions; Microthermometry; Molybdenite; Omey Granite; Rhenium osmium geochronometry

Indexed keywords

INCLUSIONS; MINERALOGY; MOLYBDENUM; QUARTZ; RHENIUM ALLOYS; THERMOMETERS;

FLUID INCLUSION; GEOCHRONOMETRY; MICROTHERMOMETRY; MINERALISATION; MOLYBDENITE; QUARTZ VEINS;

GEOCHRONOLOGY;

BATHOLITH; CALEDONIAN OROGENY; EMPLACEMENT; FLUID INCLUSION; GEOCHRONOLOGY; GRANITE; MINERALIZATION; MOLYBDENITE; QUARTZ VEIN; RHENIUM-OSMIUM DATING;

CONNACHT; CONNEMARA; COUNTY GALWAY; EURASIA; EUROPE; GALWAY [COUNTY GALWAY]; IRELAND; WESTERN EUROPE;

EID: 35548993150     PISSN: 03717453     EISSN: None     Source Type: Journal    
DOI: 10.1179/174327507X207465     Document Type: Article

References (40)

1. R. A. Ayuso: 'Geochemical and metallogenic contrasts in Palaeozoic granitic rocks of the northern New England Appalachians', in 'Norumbega Fault system of the northern Appalachians', (ed. A. Ludman and D. P. West), No. 331, 155-166; 1999, Boulder, CO, USA.
2. R. J. Bakker: 'CLATHRATES: computer programs to calculate fluid inclusion V-X properties using clathrate melting temperatures', Comput. Geosci., 1997, 23, (1), 1-18.
3. R. J. Bakker: 'Package FLUIDS 1. Computer programs for analysis of fluid inclusion data and for modeling bulk fluid properties', Chem. Geol., 2003, 194, (1-3), 3-23.
4. R. Buchwaldt, A. Kroner, W. Todt, M. Feely and T. Toulkeridis: 'Geochemistry, single zircon ages and Sm/Nd isotope analysis of the Galway Granite batholith, western Ireland', Acta Univ. Carolinae-Geol., 1998, 42, 215-216.
5. R. Buchwaldt, A. Kroner, T. Toulkeridis, W. Todt and M. Feely: 'Geochronology and Nd-Sr systematics of Late Caledonian granites in western Ireland: new implications for the Caledonian orogeny', Geol. Soc. Am. Abstracts Programs, 2001, 33, (), A32.
6. D. C. Bradley, R. D. Tucker, D. R. Lux, A. G. Harris and D. C. McGregor: 'Migration of the Acadian Orogen and foreland basin across the Northern Appalachians of Maine and adjacent areas', USGS professional paper no.1624, 2000.
7. E. J. Cobbing: 'The geology of the district north-west of Clifden, Co. Galway', Proc. Roy. Irish Acad. B, 1969, 67B, 303-325.
8. R. A. Creaser, D. A. Papanastassiou and G. J. Wasserburg: 'Negative thermal ion mass spectrometry of osmium, rhenium and iridium', Geochim. Cosmochim. Acta, 1991, 55, 397-401.
9. J. M. Derham: 'Structural control of sulphide mineralisation at Mace Head, Co. Galway', in 'Geology and genesis of mineral deposits in Ireland', (ed. C. J. Andrews et al.), 187-193; 1986, Dublin, Irish Association for Economic Geology.
10. J. M. Derham and M. Feely: 'A K-feldspar breccia from the Mo-Cu stockwork deposit in the Galway Granite, west of Ireland', J. Geol. Soc. Lond., 1988, 145, 661-667.
11. J. F. Dewey and R. A. Strachan: 'Changing Silurian-Devonian relative plate motion in the Caledonides: sinistral transpression to sinistral transtension', J. Geol. Soc. Lond., 2003, 160, 219-229.
12. 2 system: prediction of phase equilibria and volumetric properties', Geochim. Cosmochim. Acta, 1995, 59, 2869-2882.
13. E. M. Elias, R. M. Macintyre and B. E. Leake: 'The cooling history of Connemara, Western Ireland, from K-Ar and Rb-Sr age studies', J. Geol. Soc. Lond., 1988, 145, 649-660.
14. M. Feely, D. Coleman, S. Baxter and B. Miller: 'U-Pb zircon geochronology of the Galway Granite, Connemara, Ireland: implications for the timing of late Caledonian tectonic and magmatic events and for correlations with Acadian plutonism in New England', Atlant. Geol., 2003, 39, 175-184.
15. M. Feely and H. Hoegelsberger: 'Preliminary fluid inclusion studies of the Mace Head Mo-Cu deposit in the Galway Granite', Irish J. Earth Sci., 1991, 11, 1-10.
16. 2O: a study of contact metamorphism and convective fluid movement around the Omey granite, Connemara, western Ireland', Min. Mag., 1985, 49, 505-515.
17. C. C. Ferguson and P. K. Harvey: 'Thermally overprinted Dalradian rocks near Cleggan, Connemara, western Ireland', Proc. Geol. Assoc. Lond., 1979, 90, 43-50.
18. V. Gallagher, M. Feely, H. Hoegelsberger, G. R. T. Jenkin and A. E. Fallick: 'Geological, fluid inclusion and stable isotope studies of Mo mineralisation, Galway Granite, Ireland', Miner. Depos., 1992, 27, 314-325.
19. D. H. W. Hutton: 'Igneous emplacement in a shear zone termination: the biotite granite at Strontian, Scotland', Geol. Soc. Am. Bull., 1988, 100, 1392-1399.
20. D. H. W. Hutton and R. J. Reavy: 'Strike-slip tectonics and granite petrogenesis', Tectonics, 1992, 11, 960-967.
21. P. J. Leggo, W. Compston and B. E. Leake: 'Geochronology of the Connemara granites and its bearing on the antiquity of the Dalradian series', Q. J. Geol. Soc. Lond., 1966, 122, 91-118.
22. A. J. Macdonald and E. T. C. Spooner: 'Calibration of a Linkam TH600 programmable heating-cooling stage for microthermometric examination of fluid inclusions', Econ. Geol., 1981, 74, 1248-1258.
23. R. Markey, H. Stein and J. Morgan: 'Highly precise Re-Os datin for molybdenite using alkaline fusion and NTIMS', Talanta, 1998, 45, 935-946.
24. M. D. Max and V. Talbot: 'Molydenum concentrations in the western end of the Galway Granite and their structural setting', in 'Geology and genesis of mineral deposits in Ireland', (ed. C. J. Andrews et al.), 177-185; 1996, Dublin, Irish Association Economic Geology.
25. B. E. Nesbitt: 'Fluid flow and chemical evolution in the genesis of hydrothermal ore deposits', in 'Short course on fluids in tectonically active regimes of the continental crust', (ed. B. E. Nesbitt), Vol. 18, 261-298; 1990, Toronto, Mineralogical Association of Canada.
26. P. J. O'Connor, H. Hoegelsberger, M. Feely and D. C. Rex: 'Fluid inclusion studies, rare-earth element chemistry and age of hydrothermal fluorite mineralisation in western Ireland- a link with continental rifting', Trans. Inst. Min. Metall. B, 1993, 102B, 141-148.
27. C. O'Raghallaigh, M. Feely, P. McArdle, C. Macdermot, M. Geoghegan and R. Keary: 'Mineral localities in the Galway Bay Area', Report Series RS97/1 (Mineral Resources), Geological Survey of Ireland, Dublin, Ireland, 1997, 70.
28. C. O'Reilly, G. R. T. Jenkin, M. Feely, D. H. M. Alderton and A. E. Fallick: 'A fluid inclusion and stable isotope study of 200 Ma of fluid evolution in the Galway Granite, Connemara, Ireland', Contrib. Mineral. Petrol., 1997, 129, 120-142.
29. R. T. Pidgeon: 'Zircon U-Pb ages from the Galway Granite and the Dalradian, Connemara, Ireland', Scott. J. Geol., 1969, 5, 375-392.
30. J. A. Plant: 'Models for granites and their mineralising systems in British and Irish Caledonides', in 'Geology and genesis of mineral deposits in Ireland', (ed. C. J. Andrews et al.), 121-156; 1986, Dublin, Irish Association for Economic Geology.
31. N. Reynolds, P. McArdle, J. F. Pyne, L. P. C. Farrell and A. M. Flegg: 'Mineral localities in the Dalradian and associated igneous rocks of Connemara, County Galway', Report Series (Mineral Resources), Geological Survey of Ireland, Dublin, Ireland, 1990, 89.
32. D. Selby and R. A. Creaser: 'Re-Os geochronology and systematics in molybdenum from the Endako porphyry molybdenum deposit, British Columbia, Canada', Econ. Geol., 2001, 96, 197-204.
33. D. Selby and R. A. Creaser: 'Macroscale NTIMS and microscale LA-MC-ICP-MS Re-Os isotopic analysis of molybdenite: testing spatial restriction for reliable Re-Os age determinations, and implications for the decoupling of Re and Os within molybdenite', Geochim. Cosmochim. Acta, 2004, 68, 3897-3908.
34. D. Selby, R. A. Creaser and M. Feely: 'Accurate Re-Os molybdenite dates from the Galway Granite, Ireland. A critical comment to: Disturbance of the Re-Os chronometer of molybdenites from the late-Caledonian Galway Granite, Ireand, by hydrothermal fluid circulation', Geochem. J., 2004, 38, 291-294.
35. 187Os molybdenite and U-Pb zircon chronometers', Geochim. Cosmochim. Acta, to be published.
36. M. I. Smoliar, R. J. Walker and J. W. Morgan: 'Re-Os isotope constraints on the age of Group IIA, IIIA, IVA and IVB iron meteorites', Science, 1996, 271, 1099-1102.
37. R. Townend: 'The geology of some granite plutons from western Connemara, Co. Galway', Proc. Roy. Irish Acad. B, 1966, 65B, 157-202.
38. J. Volkening, T. Walczyk and K. G. Heumann: 'Osmium isotope ratio determinations by negative thermal ion mass spectrometry', Int. J. Mass Spectrom. Ion Process., 1991, 105, 147-159.
39. G. Westra and S. B. Keith: 'Classification and genesis of stock-work molybdenum deposits', Econ. Geol., 1981, 76, 844--873.
40. J. B. Whalen: 'Geology, petrography and geochemistry of Appalachian granites in New Brunswick and Gaspesie, Quebec', Geol. Surv. Can. Bull., 1993, 436, 130.