Recent hydrovolcanic deposits with evidence of magmatic immiscibility on Deception Island, Antarctica

Main Article Content

Alberto T. Caselli
Mariano R. Agusto

Abstract

Outcrops of hydro-volcanic deposits on Deception Island are stratigraphically re-classified. The sequence was assigned to a pre-caldera phase, but it has very different compositional and consolidation characteristics, enabling it to be differentiated and redefined as a new unit. In this paper, it is stratigraphically relocated as a historical eruption, on the basis of its compositional similarity to ash-falls in Bransfield Basin. The studied deposits are bimodal (basaltic/rhyolitic) implying a relationship with magma immiscibility. The occurrence of more acidic periods would allow relatively more explosive vents with greater particle dispersion to take place.

Article Details

How to Cite
Caselli, A. T., & Agusto, M. R. (2004). Recent hydrovolcanic deposits with evidence of magmatic immiscibility on Deception Island, Antarctica. Revista De La Asociación Geológica Argentina, 59(3), 495-500. Retrieved from https://revista.geologica.org.ar/raga/article/view/1456
Section
Communications

Most read articles by the same author(s)