La historia termo-cronológica de las Islas Shetland del Sur (Antártida Occidental), mediante el estudio de trazas de fisión en apatitos

• Autores: Ignacio Sell, G. Poupeau, José Manuel González Casado, Jerónimo López Martínez, E. Labrin
• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 1, 3, 2000 (Ejemplar dedicado a: V Congreso Geológico de España (Alicante, 10-14 julio 2000)), págs. 299-302
• Idioma: español
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• Resumen

  • Apatite apparent fission track ages were obtained in three samples from the South Shetland Archipelago (Antarctic Peninsula). Apatites from Livingston Island yielded Late Oligocene (25.6 ± 0.9 Ma, Miers Bluff Formation, Hurd Peninsula) to Early Miocene (22.6 ± 1.2 Ma, tonalites, Barnard Point) ages. However, apatites from King George Island yielded ages slightly older, i. e.

    Early Oligocene (31,8 ± 2,6 Ma, granodiorite, Barton Peninsula). These ages suggest indicating cooling through 100 ± 10°C coeval with the end of the main magmatic event and appear to be older towards the SE.