Tephrochronology of the Toba tuffs: four primary glass populations define the 75-ka Youngest Toba Tuff, northern Sumatra, Indonesia

ABSTRACT Four primary glass populations, well defined by their Sr, Ba and Y concentrations, occur in the Youngest Toba Tuff (YTT), which was deposited during a supereruption of the Toba caldera complex in northern Sumatra 75 ka. Average concentrations of major and trace elements indicate a coherent,...

Full description

Saved in:
Bibliographic Details
Published in:Journal of quaternary science 2013-11, Vol.28 (8), p.772-776
Main Authors: WESTGATE, J. A., PEARCE, N. J. G., PERKINS, W. T., PREECE, S. J., CHESNER, C. A., MUHAMMAD, R. F.
Format: Article
Language:English
Subjects:
Ashes
Concentration (composition)
Deposition
Drilling
Glass
Indian Ocean
Indonesia
Isotopes
Oceans
Populations
tephrochronology
Toba tuffs
Trace elements
Tuff
volcanic glass
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:ABSTRACT Four primary glass populations, well defined by their Sr, Ba and Y concentrations, occur in the Youngest Toba Tuff (YTT), which was deposited during a supereruption of the Toba caldera complex in northern Sumatra 75 ka. Average concentrations of major and trace elements indicate a coherent, systematic variation of glass composition across populations. No clear pattern in the areal distribution of these four glass groups can be discerned. The multiple glass populations of the YTT easily distinguish it from the single homogeneous glass population of the Middle Toba Tuff (∼500 ka), as represented by its basal vitrophyre, and that of the Oldest Toba Tuff (∼800 ka), as represented by ash Layer D at the Ocean Drilling Program site 758 in the Indian Ocean.
ISSN:0267-8179
1099-1417
DOI:10.1002/jqs.2672