2008/04/01 by Frederick W. Taylor, Michael Bevis, Ian W. D. Dalziel +6 · 1 voice · 1 citation
Earth and Planetary Sciences · #Geological and Geochemical Analysis #Geology and Paleoclimatology Research #earthquake and tectonic studies
paper · doi:10.1029/2007gc001873
openalex publication_date 2008/04/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/23
New GPS measurements demonstrate tectonic segmentation of the South Shetland Islands platform, regarded as a microplate separating the Antarctic Peninsula from the oceanic portion of the Antarctic plate. King George, Greenwich, and Livingston islands on the central and largest segment are separating from the Antarctic Peninsula at 7–9 mm/a, moving NNW, roughly perpendicular to the continental margin. Smith and Low islands on the small southwestern segment are moving in the same direction, but at 2.2–3.0 mm/a. The Elephant Island subgroup in the northeast moves at ∼7 mm/a relative to the Peninsula, like the central group, but toward the WNW. This implies that it is presently coupled to the Scotia plate on the northern side of the South Scotia Ridge transform boundary; thus the uplift of these northeasternmost islands may be caused by Scotia‐Antarctic plate convergence rather than by subduction of thickened oceanic crust.