Shoofly oolite trail3/1/2023 ![]() ![]() Econ Geol 76:27–55īoyce AJ (1990) Sedimentation, exhalation and sulphur isotope geochemistry of the Silvermines Zn + Pb deposits, County Tipperary, Ireland. Econ Geol 97:73–91īoast AM, Coleman ML, Halls C (1981) Textural and stable isotopic evidence for the genesis of the Tynagh base metal deposit, Ireland. Soc Am Abs Prog 34:386īlakeman RJ, Ashton JH, Boyce AJ et al (2002) Timing of interplay between hydrothermal and surface fluids in the Navan Zn + Pb orebody, Ireland: evidence from metal distribution trends, mineral textures, and d 34S analyses. Econ Geol 97:471–480īecker SP, Nagy ZR, Johnson AW et al (2002) Relationship of evaporites to brine migration and carbonate hosted Zn-Pb mineralization in the Lower Carboniferous of southeastern Ireland. Geochim Cosmochim Acta 55:1021–1030īanks DA, Boyce AJ, Samson IM (2002) Constraints on the origins of fluids forming Irish Zn-Pb-Ba deposits: evidence from the chemistry of fluid inclusions. Eur J Mineral 4:921–931īanks DA, Davies GR, Yardley BWD et al (1991) The chemistry of brines from an alpine thrust system in the central Pyrenees: an application of fluid inclusion analysis to the study of fluid behaviour in orogenesis. Irish Association for Economic Geology, Dublin, pp 243–280īanks DA, Russell MJ (1992) Fluid mixing during ore deposition at the Tynagh base-metal deposit, Ireland. In: Andrew CJ, Crowe RWA, Finley WM et al (eds) Geology and genesis of mineral deposits in Ireland. These data suggest that dolomitization and mineralization of Mississippian rocks in the Midlands requires both regionally extensive and localized fluid flow.Īshton JH, Downing DT, Finlay S (1986) The geology of the Navan Zn-Pb orebody. Type 1 fluids are enriched in chloride relative to bromide, reflecting a component of salinity derived via dissolution of halite or from dehydration of seawater. The halogen geochemistry of included fluids indicates genesis from evaporated seawater. Similar fluids have been reported in ore-associated minerals and postmineralization dolomite (Type 1) and in ore-stage carbonates and sphalerite (Types 2 and 3). Fluid inclusion data indicate the presence of three distinct fluids following early dolomitization: 1) a ubiquitous low-temperature, higher salinity fluid found in saddle dolomite 2) a low-temperature, lower salinity fluid limited to sub-Waulsortian and Waulsortian carbonates and 3) a higher temperature, lower salinity fluid found in Waulsortian and supra-Waulsortian rocks. This study provides a regional framework within which studies of ore-related dolomite and dolomite cements may be placed. ![]()
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