Ardnamurchan 3D cone-sheet architecture explained by a single elongate magma chamber
2013 (English)In: Scientific Reports, ISSN 2045-2322, Vol. 3, 2891- p.Article in journal (Refereed) Published
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.
VOLCANOLOGY, STRUCTURAL GEOLOGY, GEOLOGY, PETROLOGY
IdentifiersURN: urn:nbn:se:uu:diva-210178DOI: 10.1038/srep02891ISI: 000325355100002OAI: oai:DiVA.org:uu-210178DiVA: diva2:661627