Article
Geosciences, Multidisciplinary
Takeshi Hasegawa, Annika Greve, Darren M. Gravley, Chie Kusu, Yasuaki Kaneda, Shohei Shibata, Makoto Okada, Szabolcs Kosik, Nobutatsu Mochizuki, Gillian Turner
Summary: Paleomagnetic analyses of the Taupo eruption's tephra indicate its intensity, with agreement between the thermoremanent magnetizations and detrital remanences validating our research method. The duration of the eruption was estimated to be less than a few tens of years. The overall mean ChRM direction suggests a younger age for the eruption compared to previous dating.
EARTH PLANETS AND SPACE
(2023)
Article
Geosciences, Multidisciplinary
Johanna Lomax, Daniel Wolf, Urs Tilmann Wolpert, Lilit Sahakyan, Hayk Hovakimyan, Dominik Faust, Markus Fuchs
Summary: The Achajur loess-palaeosol section in northeastern Armenia consists of three prominent pedocomplexes with intercalated loess units, spanning at least three glacial-interglacial cycles. The Sevkar loess area, serving as a bridge between loess sections in southeastern Europe and Central Asia, plays a crucial role in establishing a numerical chronology and reconstructing the paleoenvironment of the region. Luminescence dating on fine grain material was used to study the last glacial-interglacial cycle, showing deposition during dry phases in MIS3 and 4, and formation of pedocomplexes during wetter phases in MIS5 and MIS6.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geochemistry & Geophysics
Martin Danisik, Vera Ponomareva, Maxim Portnyagin, Sergey Popov, Andrei Zastrozhnov, Christopher L. Kirkland, Noreen J. Evans, Evgeny Konstantinov, Folkmar Hauff, Dieter Garbe-Schoenberg
Summary: Volcanic ash layers can serve as important time markers in the geological record for reconstructing paleoenvironmental, paleoclimatic, and paleogeographic conditions. This study provides geochronological and geochemical data for the Gorelka tephra, a significant marker for a major marine transgression in the Eastern Paratethys Sea during the Miocene. The eruption age of the Gorelka tephra has been constrained to 11.5 +/- 0.5 Ma, and its characteristics suggest a large-scale eruption from a volcanic source in the Transcarpathian region.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Ayumu Nishihara, Nobuo Geshi, Hideto Naruo
Summary: Stratigraphic analysis of fallout tephra deposits provides insights into the long-term temporal change in the activities of Sakurajima volcano. The study reveals the eruption stages and shifts in volcanic centers, as well as changes in eruption styles and magma discharge rates. The combined analysis of distribution, stratigraphy, and age of pumice fall layers and volcanic deposits is a powerful tool for understanding the growth history of stratovolcanoes.
FRONTIERS IN EARTH SCIENCE
(2022)
Review
Geology
Jenni L. Hopkins, David J. Lowe, Joanna L. Horrocks
Summary: This article discusses the history and development of tephra studies in New Zealand, as well as the applications of tephrochronology in the country. It explores the characteristics, detection, and correlation methods of tephra, along with its diverse applications in climate, volcanic activity, marine records, and paleosol research.
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
(2021)
Article
Geography, Physical
Kaja Fenn, David S. G. Thomas, Julie A. Durcan, Ian L. Millar, Daniel Veres, Alma Piermattei, Christine S. Lane
Summary: Research in Central and Eastern Europe focused on loess preservation in plateau settings related to orbital scale changes, reconstructing paleoenvironmental and paleoclimatic history using quartz OSL, feldspar pIR-IRSL, and tephra correlation. Analysis of the Slivata profiles revealed a complex sedimentary sequence with periods of enhanced dust flux, sediment accumulation, and palaeosol development, indicating a dynamic landscape influenced by local factors. Identification of the Cape Riva/Y-2 tephra horizon in Slivata provides a new tephrostratigraphic marker for LGM loess in Eastern Europe.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Multidisciplinary Sciences
Stephen B. Piva, Simon J. Barker, Nels A. Iverson, V. Holly L. Winton, Nancy A. N. Bertler, Michael Sigl, Colin J. N. Wilson, Nelia W. Dunbar, Andrei V. Kurbatov, Lionel Carter, Bruce L. A. Charlier, Rewi M. Newnham
Summary: By analyzing glass shards in the Antarctic ice core, this study successfully identified the Taupo volcanic eruption 1.8 ka and linked it to other eruption events. These findings are important for accurately estimating eruption timing, source volcanoes, and the impact of volcanic activities on climate.
SCIENTIFIC REPORTS
(2023)
Article
Geosciences, Multidisciplinary
Yasuo Miyabuchi, Eiichi Sato
Summary: This study examines the dispersal and grain size characteristics of the deposits from the May 14, 2018 eruption of Shinmoedake volcano in southwestern Japan. The analysis combines field and meteorological data to understand the eruption sequence and the behavior of the plume. The study finds that the wind direction and altitude influenced the dispersal and grain size of the deposits, with different characteristics observed on the east and west sides of the main dispersal axis.
EARTH PLANETS AND SPACE
(2023)
Article
Geochemistry & Geophysics
Colin J. N. Wilson, Simon J. Barker, Bruce L. A. Charlier, Madison L. Myers, Kristian F. Hansen
Summary: In this study, the validity, accuracy, and precision of rhyolite-MELTS modelling in inferring pre-eruptive magma storage conditions for eruptions at Taupo volcano, New Zealand are evaluated. Four major issues with the modelling are identified, including inappropriate application, mineralogical differences, temperature conflicts, and pressure errors, leading to the conclusion that the model is too imprecise for confident application in determining magma storage depths in the Taupo Volcanic Zone.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2021)
Article
Geosciences, Multidisciplinary
April Foote, Karoly Nemeth, Heather Handley
Summary: Recent conceptual geological frameworks emphasize that the small volume eruptions, resulting volcanic geology and architecture in continental monogenetic volcanism are sensitive to variations in external or environmental conditions. Understanding the drivers of transitions in explosive to effusive behavior within the short timescales of eruptions is essential to accurately assess volcanic hazards. Wiri Mountain Volcanic Complex in the active Auckland Volcanic Field provides a unique opportunity to study the growth and evolution of a volcanic complex. A high-resolution stratigraphic study was conducted to determine changes in eruptive style and their driving forces. The findings highlight the importance of both external and internal conditions in controlling eruption style variations and the formation of complex monogenetic volcanoes.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Review
Geography, Physical
S. D. Burgess, J. A. Vazquez, C. F. Waythomas, K. L. Wallace
Summary: The eruption of the Old Crow tephra deposited a significant amount of volcanic ash throughout Alaska and northwestern Yukon, serving as a unique isochronous marker in the Pleistocene. Recent research suggests that the eruption age of the Old Crow tephra may be approximately 75,000 years later than previously thought, potentially impacting existing models of geological and biotic evolution in the Pleistocene Beringia region.
QUATERNARY GEOCHRONOLOGY
(2021)
Article
Geology
Ruth M. Corkill, Gillian M. Turner
Summary: The paleomagnetic records of three lake sediment cores in northern New Zealand have been merged to produce a new Holocene geomagnetic secular variation record. These records were correlated using tephra and magnetic susceptibility variations, showing well-defined swings in magnetic direction at different time periods. The regional nature of geomagnetic secular variation is indicated by its agreement with records from Mavora Lakes, 1000 km further south.
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
(2022)
Article
Geography, Physical
Peter C. Almond, Sandor Gulyas, Pal Sumegi, Balazs P. Sumegi, Stephen Covey-Crump, Merren Jones, Joseph Shaw, Andrew Parker
Summary: This study reconstructed aspects of paleoenvironment in North Canterbury, eastern South Island of New Zealand through analyzing subfossil bird bone, terrestrial gastropods, eggshell, and radiocarbon ages from calcareous loess, providing insights into millennial-scale climatic variability during the extended last glacial maximum of Australasia. The paleoclimatic records in the loess correspond well with stadial and interstadial climate events defined in NZ Climate Event Stratigraphy, indicating warm and humid conditions during interstadial periods and drier, colder, and windier conditions during stadial periods.
QUATERNARY RESEARCH
(2021)
Article
Geography, Physical
J. Sevink, C. C. Bakels, R. L. van Hall, M. W. Dee
Summary: The study analyzed the age of the major Somma-Vesuvius Avellino (AV) eruption, obtaining more accurate results through an improved methodology and resolving controversies. This highlights the need for a thorough approach in C-14 dating in the Central Mediterranean. The study also points out potential environmental issues caused by toxic fluorine concentrations in volcanic tephra.
QUATERNARY GEOCHRONOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Szabolcs Kosik, Takeshi Hasegawa, Martin Danisik, Karoly Nemeth, Makoto Okada, Bjarne Friedrichs, Axel K. Schmitt
Summary: Accurate and precise dating of young eruptions is crucial for volcanic forecasting and assessing volcanic hazards. However, dating Quaternary eruptions can be challenging due to limited applicable methods. In this study, the authors conducted independent age determinations and a paleomagnetic analysis on the volcanic succession of the Puketerata maar-lava dome complex in New Zealand. The results indicate that the most recent eruptions occurred around 11.5 thousand years ago, which is younger than previously estimated, providing valuable information for volcanic hazards assessment.
EARTH PLANETS AND SPACE
(2023)
Article
Geosciences, Multidisciplinary
R. S. J. Sparks, J. D. Blundy, K. Cashman, M. Jackson, A. Rust, C. J. N. Wilson
Summary: In the past 20 years, there have been new insights into the processes leading to large silicic explosive eruptions through the integration of geophysical, geochemical, petrological, geochronological, and dynamical modeling approaches. In the next 10 years, significant advancements are expected in dynamical modeling, analytical techniques, and geophysical methods, which will be supported by field research.
BULLETIN OF VOLCANOLOGY
(2022)
Article
Geochemistry & Geophysics
Yuli Heled, Michael C. Rowe, Isabelle Chambefort, Colin J. N. Wilson
Summary: This study examines the relationship between tridymite and vapor-phase crystallization and devitrification in silicic ignimbrites, providing insights into the emplacement and cooling history of these ignimbrites. The results show that tridymite can be used as a potential mineralogical fingerprint to interpret post-emplacement devitrification and vapor-phase alteration, and to study the lateral transport of fluids in geothermal reservoirs.
AMERICAN MINERALOGIST
(2022)
Article
Geology
Susan Ellis, Simon J. Barker, Colin J. N. Wilson, I. Hamling, Sigrun Hreinsdottir, Finnigan Illsley-Kemp, Eleanor R. H. Mestel, James D. Muirhead, Bubs Smith, Graham Leonard, Martha K. Savage, Pilar Villamor, Peter Otway
Summary: Lake Taupo is a volcanic caldera in the central Taupo Volcanic Zone, and ground deformation is an important indicator of volcanic unrest. The authors present a spreadsheet tool, TaupoInflate, for calculating and plotting ground deformation caused by magmatic inflation beneath the caldera. Some locations around the lake have limited detection capabilities for inflating magma bodies due to station placement restrictions.
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
(2022)
Correction
Geochemistry & Geophysics
Shane M. Rooyakkers, Colin J. N. Wilson, C. Ian Schipper, Simon J. Barker, Aidan S. R. Allan
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2023)
Article
Geochemistry & Geophysics
Leo R. Pure, Colin J. N. Wilson, Bruce L. A. Charlier, John A. Gamble, Dougal B. Townsend, Graham S. Leonard
Summary: New geochemical data for Tongariro volcano in New Zealand reveal systematic cycles in its eruptive history, with mafic replenishment events occurring at specific intervals. The isotopic ratios also indicate periods of prolonged crustal residence of magmas. It is suggested that the magma assembly processes at Tongariro and neighboring volcanoes were contemporaneous and influenced by tectonic activities.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2023)
Article
Geography, Physical
Stephen B. Piva, Simon J. Barker, Rewi M. Newnham, Andrew B. H. Rees, Colin J. N. Wilson, Lionel Carter, Nels A. Iverson, Benjamin Läuchli, Paul C. Augustinus
Summary: This study analyzed sediment cores from Onepoto maar palaeolake in Auckland to investigate the impacts of the Oruanui supereruption on vegetation and landscape. The results showed that the eruption caused partial defoliation of canopy trees, allowing more light penetration and promoting sub-canopy vegetation growth. This study also demonstrated the value of millimeter-scale stratigraphic pollen analysis for assessing eruptive impacts on sub-decadal timescales.
JOURNAL OF QUATERNARY SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Hannah C. Elms, Simon J. Barker, Daniel J. Morgan, Colin J. N. Wilson, Bruce L. A. Charlier
Summary: Understanding the formation and development of magma bodies in the crust prior to eruption is crucial for volcanic monitoring. This study focuses on the timescales of pre-eruptive processes during young intra-caldera eruptions in O over bar kataina Volcanic Centre, New Zealand. By analyzing mineral chemistry and zoning patterns, the researchers found that melt segregation, magma body assembly, and residence in the upper crust occur over timescales ranging from decades to centuries or even as short as months. The findings highlight the importance of multiple processes in the assembly and eruption of melt bodies and their relevance to geophysical imaging and monitoring initiatives.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2023)
Article
Geography, Physical
Charlotte O. Pizer, Jamie D. Howarth, Kate J. Clark, Colin J. N. Wilson, Stephanie E. Tickle, Jenni L. Hopkins, Jenny A. Dahl
Summary: Volcanic ash (tephra) horizons are important for correlating natural archives, but age uncertainties can hinder their effectiveness. We use the Waimihia tephra as a case study to improve age constraints for Holocene tephra isochrons by employing detailed assessments, precise AMS dating, and Bayesian age models. Our findings have implications for refining paleoearthquake correlations and chronologies relying on the Waimihia isochron.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geology
Max O. Kluger, David J. Lowe, Vicki G. Moon, Jordanka Chaneva, Richard Johnston, Pilar Villamor, Tehnuka Ilanko, Richard A. Melchert, Rolando P. Orense, Remedy C. Loame, Nic Ross
Summary: We analysed various soft-sediment deformation structures (SSDSs) in siliceous tephra layers deposited in riverine-phytogenic lakes in the Hamilton lowlands, New Zealand. These SSDSs include down-sagging structures of different sizes and dykes. Through sediment/tephra descriptions and scanning, we classified these structures and identified the deformation mechanism. The liquefaction of older tephra layers may have been triggered by seismic activity to the northeast, while the liquefaction of younger tephra layers may have been caused by local faulting or distant faulting.
SEDIMENTARY GEOLOGY
(2023)
Article
Engineering, Geological
Jordanka Chaneva, Max O. Kluger, Vicki G. Moon, David J. Lowe, Rolando P. Orense
Summary: Limited experimental data on the mechanical behavior of crushable pumiceous soils, especially pumiceous silts, led this study to investigate the undrained behavior and liquefaction resistance of a natural volcanic-ash derived, non-plastic pumiceous silt from northern New Zealand through monotonic and cyclic triaxial tests. The results revealed that the pumiceous silt exhibited a contractive response and high flow liquefaction susceptibility, similar to hard-grained soils. Furthermore, the material showed lower liquefaction resistance compared to hard-grained soils and pumiceous sands.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Geochemistry & Geophysics
Shane M. Rooyakkers, Isabelle Chambefort, Kevin Faure, Colin J. N. Wilson, Simon J. Barker, Nick Mortimer, Hannah C. Elms, Juliana Troch, Bruce L. A. Charlier, Graham S. Leonard, David Farsky
Summary: Despite the common association of large-scale magmatism with intense hydro-thermal activity, magmas with low 818O values are globally rare. This study investigates this paradox in the central Taupo Volcanic Zone (TVZ) in New Zealand and provides possible explanations. The study finds that although silicic magmas with low 818O values are absent, interactions between large silicic magmatic systems and shallow altered crustal rocks are common and widespread in the TVZ.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geosciences, Multidisciplinary
Nick Mortimer, Bruce L. A. Charlier, Shane M. Rooyakkers, Rose E. Turnbull, Colin J. N. Wilson, Marianne Negrini, Stephen Bannister, Sarah D. Milicich, Isabelle Chambefort, Craig A. Miller, Geoff Kilgour
Summary: The Quaternary volcanic rocks in New Zealand's Taupo Volcanic Zone (TVZ) are hosted by the metasedimentary crustal basement terranes rather than the volcanic and volcaniclastic fill. Research shows that the boundary of these terranes is not vertical, but gently dips west. This new interpretation provides important constraints for geodynamic understanding, petrological modeling, and future deep geothermal drilling.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2023)
Article
Multidisciplinary Sciences
Stephen B. Piva, Simon J. Barker, Nels A. Iverson, V. Holly L. Winton, Nancy A. N. Bertler, Michael Sigl, Colin J. N. Wilson, Nelia W. Dunbar, Andrei V. Kurbatov, Lionel Carter, Bruce L. A. Charlier, Rewi M. Newnham
Summary: By analyzing glass shards in the Antarctic ice core, this study successfully identified the Taupo volcanic eruption 1.8 ka and linked it to other eruption events. These findings are important for accurately estimating eruption timing, source volcanoes, and the impact of volcanic activities on climate.
SCIENTIFIC REPORTS
(2023)
Article
Geosciences, Multidisciplinary
Hannah C. Elms, Madison L. Myers, Alexander R. L. Nichols, Paul J. Wallace, Colin J. N. Wilson, Simon J. Barker, Bruce L. A. Charlier
Summary: By studying eight volcanic eruptions at the Okataina Volcanic Centre in New Zealand, it was found that there are differences in the volatile content and ascent rate of volcanic rock, melt inclusions, and embayments. The final movement of volcanic eruption towards the surface may only take a few hours.
BULLETIN OF VOLCANOLOGY
(2023)
Article
Anthropology
Nicholas W. S. Hogg, Yi-lin E. Chen, Glenn R. Summerhayes, Gretel Boswijk, Sturt W. Manning, Alan G. Hogg, Chris Gosden
Summary: This paper reviews the current knowledge of Lapita stilt structures in the Bismarck Archipelago, Papua New Guinea, and presents new data from the study of a wooden post from a Lapita-era stilt structure in the Arawe Islands. The analysis identifies the wooden post as Intsia bijuga, a saltwater-resistant species, suggesting that the Lapita populations had a good understanding of available timber resources. The paper also describes the first attempt to radiocarbon wiggle-match date a Lapita-age wooden artifact.
AUSTRALIAN ARCHAEOLOGY
(2022)
Article
Geography, Physical
Monika Devi, Naveen Chauhan, Ashok K. Singhvi
Summary: Devi et al. (2022) suggested that post-violet infrared stimulated luminescence (pVIRSL) of K-feldspars has a near zero athermal fading rate. This study investigates the mechanism and suitability of the pVIRSL signal for dating applications. The results show that pVIRSL is a recuperated signal resulting from the eviction and recapture of charges in deep traps by violet stimulation and subsequent infrared stimulation. The pVIR-SAR protocol worked well for dating seven K-feldspar samples from various depositional environments.
QUATERNARY GEOCHRONOLOGY
(2024)
Article
Geography, Physical
Chloe Baldreki, Andrew Burnham, Martina Conti, Lucy Wheeler, Michael J. Simms, Lawrence Barham, Tom S. White, Kirsty Penkman
Summary: Aragonitic calcium carbonate mollusc shells with complex shell microstructures can be used for amino acid geochronologies in Africa. Different microstructural shell layers may have different protein compositions, requiring sampling strategies. The 3AL shell portion showed closer adherence to closed-system behavior and demonstrated the potential of fossil achatinids for building relative amino acid geochronologies across Africa.
QUATERNARY GEOCHRONOLOGY
(2024)
Article
Geography, Physical
Patrick Chiroiu, Alexandru L. Onaca, Adrien Favillier, Mircea Voiculescu, Christophe Corona, Petru Urdea, Markus Stoffel
Summary: Snow avalanches present a constant threat to mountainous regions worldwide, and understanding past avalanche events is crucial for managing and mitigating avalanche hazards and risks. In this study, dendrogeomorphic techniques were used to analyze 17 avalanche paths in a small region of the Fagaras Mountains. The analysis reconstructed 174 snow avalanche years across all paths and revealed widespread avalanche occurrence in the study area. The study emphasizes the importance of investigating multiple avalanche paths in a small, homogeneous area to gain a better understanding of snow avalanche activity at both path-scale and mountain range-scale.
QUATERNARY GEOCHRONOLOGY
(2024)
