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Ardnamurchan 3D cone-sheet architecture explained by a single elongate magma chamber
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Solid Earth Geology.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Solid Earth Geology.
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2013 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 3, 2891- p.Article in journal (Refereed) Published
Abstract [en]

The Palaeogene Ardnamurchan central igneous complex, NW Scotland, was a defining place for the development of the classic concepts of cone-sheet and ring-dyke emplacement and has thus fundamentally influenced our thinking on subvolcanic structures. We have used the available structural information on Ardnamurchan to project the underlying three-dimensional (3D) cone-sheet structure. Here we show that a single elongate magma chamber likely acted as the source of the cone-sheet swarm(s) instead of the traditionally accepted model of three successive centres. This proposal is supported by the ridge-like morphology of the Ardnamurchan volcano and is consistent with the depth and elongation of the gravity anomaly underlying the peninsula. Our model challenges the traditional model of cone-sheet emplacement at Ardnamurchan that involves successive but independent centres in favour of a more dynamical one that involves a single, but elongate and progressively evolving magma chamber system.

Place, publisher, year, edition, pages
2013. Vol. 3, 2891- p.
Keyword [en]
VOLCANOLOGY, STRUCTURAL GEOLOGY, GEOLOGY, PETROLOGY
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-210178DOI: 10.1038/srep02891ISI: 000325355100002OAI: oai:DiVA.org:uu-210178DiVA: diva2:661627
Available from: 2013-11-04 Created: 2013-11-04 Last updated: 2017-12-06Bibliographically approved

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