Evidence for a volcanic rifted margin and oceanic crustal structure for the Falkland Plateau Basin

  • Barker P
  • 29

    Readers

    Mendeley users who have this article in their library.
  • 15

    Citations

    Citations of this article.

Abstract

Marine geophysical data from the western Falkland Plateau show strongly lineated magnetic anomalies and a coincident linear gravity high that identify the southeastern margin of a Falkland Islands block as a volcanic rifted continental margin. Characteristics of onshore and offshore dykes suggest this margin is most probably slightly younger than 190 Ma. Together with these data, seismic reflection profiles and sonobuoy seismic refraction data from the basin province of the Falkland Plateau east of the islands indicate an elevated oceanic origin for the major part of the Falkland Plateau Basin, most probably within the Karoo hotspot province. These conclusions are compatible with, but do not directly indicate the independent rotation of a Falkland Islands block, and closely constrain models of southwest Gondwana evolution.

Author-supplied keywords

  • 1
  • a
  • and is known to
  • eastward from south america
  • falkland
  • fig
  • geophysical surveys
  • gondwana
  • have been part of
  • karoo
  • passive margins
  • rigid south american plate
  • since the start of
  • south atlantic
  • the falkland plateau extends
  • to about 41 w

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • P. F. Barker

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free