Simon J. Barker
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View article: Nowhere to hide: Volcanic ash invasion of limestone caves in New Zealand
Nowhere to hide: Volcanic ash invasion of limestone caves in New Zealand Open
Limestone caves are commonly located close to volcanic regions and can preserve signals of past eruptions, providing crucial chronostratigraphic constraints within and beyond U-Th dating limits for karst development and cave evolution. Her…
VolcanoVR: A virtual reality environment for volcanic data visualisation and communication Open
With the increasing size and complexity of geological datasets relating to volcano monitoring and research, effective visualisation can be challenging. Here, we demonstrate the possibilities of volcanic data visualisation utilising virtual…
Evidence From Intermediate‐Depth Earthquakes of Slab‐Derived Fluids Beneath the Taupō Volcanic Zone Open
Ahi Tupua, the central section of the Taupō Volcanic Zone in the central North Island of New Zealand, encompasses Taupō and Ōkataina calderas and has been the most frequently active and productive silicic magma system worldwide during the …
Volcanic glass from the 1.8 ka Taupō eruption (New Zealand) detected in Antarctic ice at ~ 230 CE Open
Chemical anomalies in polar ice core records are frequently linked to volcanism; however, without the presence of (crypto)tephra particles, links to specific eruptions remain speculative. Correlating tephras yields estimates of eruption ti…
Millimetre‐scale pollen analysis of non‐varved lacustrine sediments from Onepoto maar palaeolake, Auckland, reveals distal vegetation responses and landscape recovery following the ~25.5‐ka Ōruanui supereruption, New Zealand Open
The ~25.5‐ka Ōruanui supereruption (Taupō volcano, New Zealand) erupted >1100 km 3 of pyroclastic material during the Last Glacial Maximum. The impacts of this event on climate and the New Zealand environment remain unresolved, particularl…
Contrarian Conspiracy Theories and Higher-Order Evidence Open
Is it always epistemically irrational to believe a conspiracy theory? Not on principle. According to the standard definition in the philosophical literature, conspiracy theories are too wide and heterogenous a class for us to proffer any u…
Tracking Magma‐Crust‐Fluid Interactions at High Temporal Resolution: Oxygen Isotopes in Young Silicic Magmas of the Taupō Volcanic Zone Open
Oxygen isotopes are useful for tracing interactions between magmas, crustal rocks and surface‐derived waters. We use them here to consider links between voluminous silicic magmatism and large‐scale hydrothermal circulation in New Zealand's…
A sulfur and halogen budget for the large magmatic system beneath Taupō volcano Open
The transport and degassing pathways of volatiles through large silicic magmatic systems are central to understanding geothermal fluid compositions, ore deposit genesis, and volcanic eruption dynamics and impacts. Here, we document sulfur …
View article: The 15 January 2022 Hunga eruption, Tonga – first petrographic and geochemical results
The 15 January 2022 Hunga eruption, Tonga – first petrographic and geochemical results Open
<p>The phreatoplinan eruption of the shallow submarine Hunga Volcano Tonga formed global air-pressure waves, regional tsunami and an up to 55 km-high eruption column. Despite its large explosive magnitude, the magma erupted were simi…
View article: Post-2015 caldera morphology of the Hunga Tonga-Hunga Ha&#8217;apai caldera, Tonga, through drone photogrammetry and summit area bathymetry
Post-2015 caldera morphology of the Hunga Tonga-Hunga Ha’apai caldera, Tonga, through drone photogrammetry and summit area bathymetry Open
<p>In December 2014, eruptions began from a submarine vent between the islands of Hunga Tonga and Hunga Ha&#8217;apai, 65 km north of Tongatapu, Tonga. The &#8220;Hungas&#8221; represent small NW and NE remnants of the fl…
Stretching, Shaking, Inflating: Volcanic-Tectonic Interactions at a Rifting Silicic Caldera Open
Silicic caldera volcanoes are frequently situated in regions of tectonic extension, such as continental rifts, and are subject to periods of unrest and/or eruption that can be triggered by the interplay between magmatic and tectonic proces…
Post-caldera volcanism reveals shallow priming of an intra-ocean arc andesitic caldera: Hunga volcano, Tonga, SW Pacific Open
Intra-oceanic arcs are typically associated with intermediate (andesitic) cone volcanoes. However, caldera volcanoes may also form in these settings from very large eruptions, resulting in sudden changes to the magma reservoir. These reser…
Supplementary Figures for "TaupōInflate: illustrating detection limits of magmatic inflation below Lake Taupō" (Ellis et al., 2022) Open
Contains two supplementary figures: Supplementary Figure S1. Minimum resolvable inflating sphere volume at each station around Lake Taupō as a function of source depth and overpressure Supplementary Figure 2. Detection of a melt body infl…
Comment on nhess-2021-109 Open
Theoretical source models of underwater explosions are often applied in studying tsunami hazards associated with submarine volcanism; however, their use in numerical codes based on the shallow water equations can neglect the significant di…
The Origin of Rhyolitic Magmas at Krafla Central Volcano (Iceland) Open
We present a detailed petrologic study of rhyolites from seven eruptions spanning the full (∼190 ky) history of rhyolitic volcanism at Krafla volcano, northeast Iceland. The eruptions vary widely in size and style, but all rhyolites are cr…
Tephrochronology and Provenance of an Early Pleistocene (Calabrian) Tephra From IODP Expedition 374 Site U1524, Ross Sea (Antarctica) Open
We present a full characterization of a 20 cm‐thick tephra layer found intercalated in the marine sediments recovered at Site U1524 during International Ocean Discovery Program (IODP) Expedition 374, in the Ross Sea, Antarctica. Tephra bed…
Volcanic Unrest at Taupō Volcano in 2019: Causes, Mechanisms and Implications Open
Taupō volcano, New Zealand, is a large caldera volcano that has been highly active through the Holocene. It most recently erupted ∼1,800 years ago but there have been multiple periods of historic volcanic unrest. We use seismological and g…
Earthquake Analysis Suggests Dyke Intrusion in 2019 Near Tarawera Volcano, New Zealand Open
Tarawera volcano (New Zealand) is volumetrically dominated by rhyolitic lavas and pyroclastic deposits, but the most recent event in AD 1886 was a basaltic Plinian fissure eruption. In March 2019 a swarm of at least 64 earthquakes occurred…
Earthquake catalogue for Tarawera region, March 2019 Open
Earthquake catalogue in QuakeML format for the Tarawera region, New Zealand, March 2019. If you use this dataset please cite the following publication: Benson, T.W., Illsley-Kemp, F., Elms, H.C., Hamling, I.J., Savage, M.K., Wilson, C.J.N.…
Earthquake catalogue for Tarawera region, March 2019 Open
Earthquake catalogue in QuakeML format for the Tarawera region, New Zealand, March 2019. If you use this dataset please cite the following publication: Benson, T.W., Illsley-Kemp, F., Elms, H.C., Hamling, I.J., Savage, M.K., Wilson, C.J.N.…
Implications of a Supervolcano’s Seismicity Open
Last year’s rumblings beneath New Zealand’s Taupō supervolcano, the site of Earth’s most recent supereruption, lend new urgency to research and outreach efforts in the region.
Implications of a Supervolcano’s Seismicity Open
Last year’s rumblings beneath New Zealand’s Taupō supervolcano, the site of Earth’s most recent supereruption, lend new urgency to research and outreach efforts in the region.
Implications of a Supervolcano’s Seismicity Open
Last year’s rumblings beneath New Zealand’s Taupō supervolcano, the site of Earth’s most recent supereruption, lend new urgency to research and outreach efforts in the region.
What lies beneath? Reconstructing the primitive magmas fueling voluminous silicic volcanism using olivine-hosted melt inclusions Open
Understanding the origins of the mantle melts that drive voluminous silicic volcanism is challenging because primitive magmas are generally trapped at depth. The central Taupō Volcanic Zone (TVZ; New Zealand) hosts an extraordinarily produ…
Comment on “Rapid cooling and cold storage in a silicic magma reservoir recorded in individual crystals” Open
Rubin et al . (Reports, 16 June 2017, p. 1154) proposed that gradients in lithium abundance in zircons from a rhyolitic eruption in New Zealand reflected short-lived residence at magmatic temperatures interleaved with long-term “cold” (<65…