Transactions of the Institution of Mining and Metallurgy (Section B, Applied earth science), 111, B203-B214. Ore Mineralogy of the mesothermal gold lodes of the Dolgellau Gold Belt, North Wales. UK Journal of Mines and Minerals, 19, 30-36. Tucekite, a mineral new to Britain, and other rare ore minerals from the Central Wales Orefield. Transactions of the Institution of Mining and Metallurgy (Section B: Applied Earth Science), 106, B135-B144. Regional polyphase and polymetallic vein mineralisation in the Caledonides of the Central Wales Orefield. Unpublished M.Phil thesis, University of Wales (Aberystwyth). Unpublished Ph.D thesis, University of London, UK.Ī Regional Paragenesis for the Central Wales Orefield. The mineralogy, paragenesis and structure of the ores of the Dolgellau Gold Belt, Merionethshire, and associated wall rock alteration. The London, Edinburgh and Dublin Philosophical Magazine and Journal of Science, 35, 171-184. The explanation put forth here proceeds from the variable alloy (and susceptibility to dilution) of natural electrum, and the difficulty of determining that. Alloy is a simple structural modeling language based on first-order logic developed. The geology of the Dolgelley gold-belt, North Wales. The Analyzer provides both bounded and unbounded model checking procedures. Gilbey PhD Collection and from recent mineral exploration in the area, during which very rare grains of electrum have also been noted in heavy-mineral concentrates obtained by stream sediment sampling.Įlectrum has also been recently found to occur in the Central Wales orefield, in trace amounts, as an inclusion-forming mineral (Mason, 1994, 1997). Electrum is an extension to the Alloy Analyzer by INESC TEC (the Institute for Systems and Computer Engineering, Technology and Science) and ONERA (the. Recent work has confirmed the presence of electrum at a number of mines, notably Clogau, Ffridd-goch and Tyddyn Gwladys, in samples acquired by the National Museum of Wales from the J.W. Gilbey (1968) recorded electrum from a number of Gold-belt mines, particularly in association with a Pb-Sb-Ag dominated assemblage.
However it has been recorded from the Dolgellau Gold-belt (Forbes, 1867 Readwin, 1888 Andrew, 1810) although these earlier references are borderline if the Au/Ag ratio of 80/20 is accepted as the defining minimum silver level. Occurrence in Wales: electrum is an important ore of gold in some mining districts worldwide but is relatively uncommon in Wales, where the gold deposits are dominated by high-fineness native gold with only small amounts of silver.
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