Trends in rhyolite geochemistry, mineralogy, and magma storage during the last 50 kyr at Okataina and Taupo volcanic centres, Taupo Volcanic Zone, New Zealand

Smith, Vicki; Shane, Phil; Nairn, I. A.

doi:10.1016/j.jvolgeores.2005.05.005

Cited by 151 publications

(190 citation statements)

References 83 publications

Supporting

Mentioning

175

Contrasting

Order By: Relevance

“…Rapid cooling of small tephra particles ensures quenching of the melt to glass, which preserves information of the melt composition prior to eruption. The compositional changes provide insight into the variations in magma sources (e.g., Smith et al, 2005), conditions of magma fractionation, and evolution of magmatic flux through time (e.g., Rawson et al, 2015). Such studies are pertinent on time scales ranging from months to millions of years and from individual volcanoes to volcanic arcs or other tectonic arrangements of volcanoes.…”

Section: Tephra As a Materials For Petrological And Geochemical Studiesmentioning

confidence: 99%

“…Geochemical time-series studies on timescales of months to thousands of years typically address eruptive histories and magmatic evolution of individual volcanoes and mostly focus on proximal terrestrial tephra sequences (e.g., Smith et al, 2005Smith et al, , 2011aDonoghue et al, 2007;Óladóttir et al, 2008Hasegawa et al, 2011;Turner et al, 2011;Firth et al, 2014;Iverson et al, 2014;Schindlbeck et al, 2014;Fontijn et al, 2015;Ponomareva et al, 2015). On a longer time scale (thousands to millions of years), tephras are more readily preserved in nonerosive marine environments that are relatively close to active volcanoes.…”

Section: Tephra As a Materials For Petrological And Geochemical Studiesmentioning

confidence: 99%

See 1 more Smart Citation

Tephra without Borders: Far-Reaching Clues into Past Explosive Eruptions

2015

View full text Add to dashboard Cite

This review is intended to highlight recent exciting advances in the study of distal (>100 km from the source) tephra and cryptotephra deposits and their potential application for volcanology. Geochemical correlations of tephra between proximal and distal locations have extended the geographical distribution of tephra over tens of millions square kilometers. Such correlations embark on the potential to reappraise volume and magnitude estimates of known eruptions. Cryptotephra investigations in marine, lake, and ice-core records also give rise to continuous chronicles of large explosive eruptions many of which were hitherto unknown. Tephra preservation within distal ice sheets and varved lake sediments permit precise dating of parent eruptions and provide new insight into the frequency of eruptions. Recent advances in analytical methods permit an examination of magmatic processes and the evolution of the whole volcanic belts at distances of hundreds and thousands of kilometers from source. Distal tephrochronology has much to offer volcanology and has the potential to significantly contribute to our understanding of sizes, recurrence intervals and geochemical make-up of the large explosive eruptions.

show abstract

Section: Tephra As a Materials For Petrological And Geochemical Studiesmentioning

confidence: 99%

Section: Tephra As a Materials For Petrological And Geochemical Studiesmentioning

confidence: 99%

Tephra without Borders: Far-Reaching Clues into Past Explosive Eruptions

2015

View full text Add to dashboard Cite

show abstract

“…In order to erupt, magmas stored in relatively shallow chambers (3-8 km; e.g., Smith et al, 2005Smith et al, , 2006Matthews et al, 2011;Chesner, 2012) normally have to overcome critical overpressures up to ∼50 MPa for nucleating new fractures and up to ∼10 MPa for propagating magma up to the surface (Rubin, 1995;Jellinek and De Paolo, 2003). Whereas for small magma chambers such overpressures can be easily achieved, for very large chamber volumes it is more problematic to reach such overpressures, and dyke formation and propagation are, as a consequence, inhibited (Jellinek and De Paolo, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…Dykes feeding these eruptions have to be long enough and remain open over much of their length throughout the entire explosive activity. The mechanics of feeding explosive silicic ignimbrite eruptions through a linear fissure (Korringa, 1973;Aguirre-Díaz and Labarthe-Hernañdez, 2003) or from multiple vents along a fissure (Suzuki-Kamata et al, 1993;Wilson, 2001;Smith et al, 2005Smith et al, , 2006Folch and Martí, 2009) are largely unexplored.…”

Section: Introductionmentioning

confidence: 99%

Stress Field Control during Large Caldera-Forming Eruptions

Costa

Martı́

2016

Front. Earth Sci.

View full text Add to dashboard Cite

Crustal stress field can have a significant influence on the way magma is channeled through the crust and erupted explosively at the surface. Large Caldera Forming Eruptions (LCFEs) can erupt hundreds to thousands of cubic kilometers of magma in a relatively short time along fissures under the control of a far-field extensional stress. The associated eruption intensities are estimated in the range 10 9 -10 11 kg/s. We analyse syn-eruptive dynamics of LCFEs, by simulating numerically explosive flow of magma through a shallow dyke conduit connected to a shallow magma (3-5 km deep) chamber that in turn is fed by a deeper magma reservoir (>∼10 km deep), both under the action of an extensional far-field stress. Results indicate that huge amounts of high viscosity silicic magma ( 10 7 > Pa s) can be erupted over timescales of a few to several hours. Our study provides answers to outstanding questions relating to the intensity and duration of catastrophic volcanic eruptions in the past. In addition, it presents far-reaching implications for the understanding of dynamics and intensity of large-magnitude volcanic eruptions on Earth and to highlight the necessity of a future research to advance our knowledge of these rare catastrophic events.

show abstract

“…Smith et al 2005), recent work on magmatic heterogeneity at some volcanoes has shown that multiple fingerprints may arise according to tephra dispersal direction during a 'single' eruption episode, adding complexity and the need for a careful approach in making long-range correlations (Shane et al 2008). Potential complications and, paradoxically, insights, thus abound especially in studying tephras and cryptotephras in the marine realm where reworking and bioturbation may be commonplace, and where 'anomalous' grain-size patterns may tell an unexpected story (e.g.…”

mentioning

confidence: 99%

Marine tephrochronology: a personal perspective

Lowe

2014

View full text Add to dashboard Cite

IntroductionThis special volume on marine tephrochronology is remarkable, and timely, because it marks a concerted step towards what might be informally termed 'phase 3' of a revolution in Quaternary geosciences that began around 40 years ago. The ten articles collectively represent a re-focussed examination of tephras and cryptotephras preserved in ocean sediments at various locations and the authors describe their significance for a range of subdisciplines. Eight provide a new understanding of the origin, distribution, and ages of various tephra and cryptotephra deposits and their stratigraphic inter-relationships; how the terrestrial ages of the tephra/crypotephra deposits relate to those of enclosing sediments and inform the ongoing development of the marine radiocarbon time-scale; mechanisms for the emplacement, remobilisation, or bioturbation of the tephras or cryptotephras; and volcanic eruption history. Two further articles document the characterization of tephra-derived glass shards using microbeam techniques to analyse 3040 elements from individual shards as small as 10 µm in diameter. The collection thus provides snapshots of many aspects of the latest developments and directions in tephra studies -volcanology, primary and secondary dispersal, stratigraphy, single-grain characterization, chronology -through the medium of marine sediments. My personal perspective reflects briefly on how this point was reached and identifies a few of the important milestones on the way from 'phase 1' to 'phase 3'. I am privileged to write it.3

show abstract

Trends in rhyolite geochemistry, mineralogy, and magma storage during the last 50 kyr at Okataina and Taupo volcanic centres, Taupo Volcanic Zone, New Zealand

Cited by 151 publications

References 83 publications

Tephra without Borders: Far-Reaching Clues into Past Explosive Eruptions

Tephra without Borders: Far-Reaching Clues into Past Explosive Eruptions

Stress Field Control during Large Caldera-Forming Eruptions

Marine tephrochronology: a personal perspective

Contact Info

Product

Resources

About