The geological association of sulphide mineralisation at Avoca, County Wicklow, a new interpretation based on field evidence

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Authors:Jones, W. B.
Author Affiliations:Primary:
West London Inst. Higher Educ., Isleworth, Middx. TW7 5DU, United Kingdom
Volume Title:Journal of Earth Sciences (Dublin)
Source:Journal of Earth Sciences (Dublin), 5(2), p.145-152. Publisher: Royal Irish Academy, Dublin, Ireland. ISSN: 0332-1851
Publication Date:1983
Note:In English. 14 refs.; illus.
Summary:The results of new fieldwork in the Avoca volcanic belt (Ireland) are presented, the chief difference from previous interpretations being that the felsic volcanics are regarded as a pile of ignimbrite flows. This is shown by the gradational transitions between lava-like and tuff-like rocks, the persistence of welded horizons for several km along strike and the presence of columnar jointing. In the absence of rhyolite domes, the presently held Kuroko-type model for the origin of the ore deposits is no longer tenable, and a slightly different model is proposed in which the metallic ores are derived by fumarolic activity from within the ignimbrite pile. (Author's abstract) [C.N.]
Subjects:Copper ores; Economic geology; Hydrothermal conditions; Igneous rocks; Ignimbrite; Kuroko-type deposits; Lead ores; Metal ores; Mineral deposits, genesis; Pyroclastics; Volcanic belts; Volcanic rocks; Volcanism; Zinc ores; Europe; Ireland; Western Europe; Wicklow Ireland; Avoca
Abstract Numbers:87M/2297
Record ID:1986023091
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from PASCAL, Institute de l'Information Scientifique et Technique
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