The Jan Mayen microcontinent: an update of its architecture, structural development and role during the transition from the Ægir Ridge to the mid-oceanic Kolbeinsey Ridge

A. Blischke, C. Gaina, J.R. Hopper, G. Péron-Pinvidic, B. Brandsdóttir, P. Guarnieri, Ö. Erlendsson, K. Gunnarsson

Research output: Chapter in Book/Report/Conference proceedingChapter in bookResearchpeer-review

37 Citations (Scopus)

Abstract

We present a revised tectonostratigraphy of the Jan Mayen microcontinent (JMMC) and its southern extent, with the focus on its relationship to the Greenland-Iceland-Faroe Ridge area and the Faroe-Iceland Fracture Zone. The microcontinent's Cenozoic evolution consists of six main phases corresponding to regional stratigraphic unconformities. Emplacement of Early Eocene plateau basalts at pre-break-up time (56-55 Ma), preceded the continental break-up (55 Ma) and the formation of seawards-dipping reflectors (SDRs) along the eastern and SE flanks of the JMMC. Simultaneously with SDR formation, orthogonal seafloor spreading initiated along the Ægir Ridge (Norway Basin) during the Early Eocene (C24n2r, 53.36 Ma to C22n, 49.3 Ma). Changes in plate motions at C21n (47.33 Ma) led to oblique seafloor spreading offset by transform faults and uplift along the microcontinent's southern flank. At C13n (33.2 Ma), spreading rates along the Ægir Ridge started to decrease, first south and then in the north. This was probably complemented by intra-continental extension within the JMMC, as indicated by the opening of the Jan Mayen Basin - a series of small pull-apart basins along the microcontinent's NW flank. JMMC was completely isolated when the mid-oceanic Kolbeinsey Ridge became fully established and the Ægir Ridge was abandoned between C7 and C6b (24-21.56 Ma).

Original languageEnglish
Title of host publicationThe NE Atlantic Region: a Reappraisal of Crustal Structure, Tectonostratigraphy and Magmatic Evolution
EditorsG. Péron-Pindvidic, J.R. Hopper, T. Funck, M.S. Stoker, C. Gaina, J.C. Doornenbal, U.E. Árting
Place of PublicationLondon
PublisherGeological Society of London
Pages299-337
Number of pages39
ISBN (Print)978-1-78620-278-9
DOIs
Publication statusPublished - 2017

Publication series

NameGeological Society Special Publications
PublisherGeological Society of London
Volume447
ISSN (Print)0305-8719

Programme Area

  • Programme Area 3: Energy Resources

Fingerprint

Dive into the research topics of 'The Jan Mayen microcontinent: an update of its architecture, structural development and role during the transition from the Ægir Ridge to the mid-oceanic Kolbeinsey Ridge'. Together they form a unique fingerprint.

Cite this