Detrital gold, heavy minerals and sediment geochemistry elucidate auriferous mineralization in southeast Ireland

Norman Moles, R.J. Chapman

Research output: Contribution to conferenceAbstract

Abstract

Recently published Tellus geochemical data for sediment fines in SE Ireland show extensive Au anomalies in north Wexford, but few anomalies in Wicklow despite historical extraction from the Goldmines River. Discovery of bedrock sources is hampered by glacial dispersion and scarce bedrock exposure. Here we describe a novel approach to characterizing regional gold metallogeny which involves the synthesis of data sets from stream sediment surveys, analysis of heavy mineral concentrates (HMCs) and detrital gold. Mineralogical characterization of HMCs and 2160 gold grains from 40 localities in the auriferous region provides a clear indication of proximity of gold to source and genetic origins. Detrital gold in the south of the region (Wexford) is most likely derived from the widespread stratabound Au-As-Fe-S reported by exploration companies, whereas the distinctive Pb-Bi-As mineral inclusion signature in detrital gold from the Goldmines River area is suggestive of a magmatic influence. Combining data sets from the different techniques yields superior information than is possible using each approach in isolation.
Original languageEnglish
Pages691-694
Number of pages4
Publication statusPublished - 27 Aug 2019
Event15th SGA Biennial Meeting 2019 - Glasgow University, Glasgow, United Kingdom
Duration: 27 Aug 201930 Aug 2019
https://www.sga2019glasgow.com/

Conference

Conference15th SGA Biennial Meeting 2019
CountryUnited Kingdom
CityGlasgow
Period27/08/1930/08/19
Internet address

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    Moles, N., & Chapman, R. J. (2019). Detrital gold, heavy minerals and sediment geochemistry elucidate auriferous mineralization in southeast Ireland. 691-694. Abstract from 15th SGA Biennial Meeting 2019, Glasgow, United Kingdom.