Exploración geofísica de los volcanes submarinos del Estrecho de Bransfield (Antártida)

  1. J. Almendros 1
  2. W. Wilcock 2
  3. D. Soule 3
  4. T. Teixidó 1
  5. Luis Vizcaíno 1
  6. O. Ardanaz 1
  7. J.L. Granja-Bruña 4
  8. D. Martín-Jiménez 5
  9. Robert Dziak 6
  10. R. Abella 7
  11. E. Carmona 1
  12. F. Carrión 1
  13. M. Schmidt-Aursch 8
  14. W. Geissler 8
  15. B. Heit 9
  16. X. Yuan 9
  1. 1 Universidad de Granada
    info

    Universidad de Granada

    Granada, España

    ROR https://ror.org/04njjy449

  2. 2 University of Washington, USA
  3. 3 Queens College, CUNY
    info

    Queens College, CUNY

    Nueva York, Estados Unidos

    ROR https://ror.org/03v8adn41

  4. 4 Universidad Complutense de Madrid
    info

    Universidad Complutense de Madrid

    Madrid, España

    ROR 02p0gd045

  5. 5 Tragsatec, Madrid
  6. 6 Pacific Marine Environment Laboratory, NOAA, USA
  7. 7 Instituto Geográfico Nacional, Madrid
  8. 8 Alfred Wegener Institute, Bremenhaven, Germany
  9. 9 GFZ Potsdam, Germany
Show affiliations +
Journal:
Geotemas (Madrid)

ISSN: 1576-5172

Year of publication: 2021

Issue Title: X Congreso Geológico de España

Issue: 18

Pages: 972

Type: Article

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Abstract

The Bransfield Strait is an extensional rift located between the Antarctic Peninsula and the South Shetland Islands. There are several instances of subaerial volcanism (e.g. Deception Island, last eruptions in 1967-1970) as well as evidences of submarine volcanism. In the framework of the BRAVOSEIS project (Almendros et al., 2020) we carried out a set of marine geophysics profiles to image the shallow crust across selected volcanic edifices and rift structures. The experiments were performed during two cruises in 2019 and 2020. We used marine geophysics methods including multibeam echosounder, sediment profiler, gravity and magnetic measurements, and multichannel seismics. We explored different areas of the Central Bransfield Basin, with a particular focus on two volcanic edifices: Orca and Humpback. Additionally we deployed a nested, amphibious seismic network comprising 15 seismometers deployed on land, 24 OBSs, and 6 hydrophone moorings. This extensive dataset may help elucidate among different theories on the origin of the Bransfield rift; image the location and extent of magma accumulation zones related to submarine volcanic structures; and assess the internal processes that occur in the submarine volcanoes of the Bransfield area.

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