Thordarson, Thor (2004): Accretionary-lapilli-bearing pyroclastic rocks at ODP Leg 192 Site 1184; a record of subaerial phreatomagmatic eruptions on the Ontong Java Plateau

Leg/Site/Hole:
ODP 192
ODP 192 1184
Identifier:
2006-012382
georefid
Creator:
Thordarson, Thor
University of Iceland, Science Institute, Reykjavik, Iceland
author
Identification:
Accretionary-lapilli-bearing pyroclastic rocks at ODP Leg 192 Site 1184; a record of subaerial phreatomagmatic eruptions on the Ontong Java Plateau
2004
In: Fitton, J. Godfrey (editor), Mahoney, John J. (editor), Wallace, Paul J. (editor), Saunders, Andrew D. (editor), Origin and evolution of the Ontong Java Plateau
Geological Society of London, London, United Kingdom
229
275-306
Detailed analysis of lithologies and lithofacies associations within the 337.7 m thick basement volcaniclastic succession, recovered during Ocean Drilling Program (ODP) Leg 192 at Site 1184 on the Ontong Java Plateau, shows that in bulk it is made up of pyroclastic deposits of phreatomagmatic origin. The succession is essentially made up of two lithologies: lapilli tuff (59% of the total recovered core length) and tuff (34%), consisting almost entirely of juvenile clasts (>97%) and containing significant amounts of matrix-supported accretionary and/or armoured lapilli clasts. The evidence indicates that the succession was formed by at least six (and perhaps as many as 10) major phreatomagmatic eruptions that were subaerial and associated with the main phase of volcanism on the Ontong Java Plateau.
English
Serial
Coverage:Geographic coordinates:
North:-5.0100
West:164.1400East: 164.1400
South:-5.0100
Igneous and metamorphic petrology; accretion; ash; basaltic composition; chemical ratios; emplacement; eruptions; grain size; igneous rocks; lapilli; Leg 192; lithofacies; Ocean Drilling Program; ODP Site 1184; Ontong Java Plateau; Pacific Ocean; phreatomagmatism; pyroclastics; stratigraphic units; tuff; volcanic rocks; volcaniclastics; volcanism; West Pacific;
.