Research Article| June 01, 1991 Relation between alkalic volcanism and slab-window formation M. J. Hole; M. J. Hole 1British Antarctic Survey, Natural Environment Research Council, Cambridge CB3 0ET, England Search for other works by this author on: GSW Google Scholar G. Rogers; G. Rogers 2Isotope Geology Unit, Scottish Universities Research and Reactor Centre, East Kilbride, Glasgow G75 0QU, Scotland Search for other works by this author on: GSW Google Scholar A. D. Saunders; A. D. Saunders 3Department of Geology, University of Leicester, University Road, Leicester LE1 7RH, England Search for other works by this author on: GSW Google Scholar M. Storey M. Storey 3Department of Geology, University of Leicester, University Road, Leicester LE1 7RH, England Search for other works by this author on: GSW Google Scholar Geology (1991) 19 (6): 657–660. https://doi.org/10.1130/0091-7613(1991)019<0657:RBAVAS>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation M. J. Hole, G. Rogers, A. D. Saunders, M. Storey; Relation between alkalic volcanism and slab-window formation. Geology 1991;; 19 (6): 657–660. doi: https://doi.org/10.1130/0091-7613(1991)019<0657:RBAVAS>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Ridge crest-trench interactions along continental destructive plate margins may result in the development of slab-free windows beneath the continental margin. Slab windows were generated at various locations along the Pacific margin of the Americas and the Antarctic Peninsula during the past 70 m.y. Slab-window formation is temporally and spatially associated with mafic, alkalic volcanism. Lavas erupted above the loci of slab windows are geochemically indistinguishable from some ocean-island, plume-related basalts. However, generation of slab-window basalts from deep-seated mantle plumes requires the fortuitous initiation of plume activity following cessation of subduction. Asthenospheric upwelling and associated decompressional melting following slab-window formation are probably promoted by removal of subducted oceanic lithosphere from beneath the continental margin following the cessation of subduction. Major lithospheric extension is not a prerequisite for alkalic volcanism in this case. The close association of subduction-related volcanism and within-plate alkalic volcanism within the geologic record may also be explained by this mechanism. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
No takes yet. Share an insight, caveat, or question.
Hole et al. (1991) studied this question.