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supervolcanoes

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Journal Article
Journal: Geology
Published: 01 November 2015
Geology (2015) 43 (11): 1039–1040.
.... , 2007 , Pre-eruption recharge of the Bishop magma system : Geology , v. 35 , p. 235 – 238 , doi:10.1130/G23316A.1. © 2015 Geological Society of America 2015 Whether such periods of magma residence at relatively cold temperatures also occur in supervolcano systems is an interesting...
Journal Article
Journal: Geology
Published: 01 September 2014
Geology (2014) 42 (9): 807–810.
... inferred from seismic data at active supervolcanoes. The connection of magma batches vertically distributed over several kilometers in the upper crust would cause a substantial increase of buoyancy overpressure, providing an eruption trigger mechanism that is the direct consequence of the reservoir...
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Journal Article
Journal: Geosphere
Published: 01 April 2013
Geosphere (2013) 9 (2): 260–274.
.... , this themed issue, Nine Hill Tuff: An extraordinarily widespread late Oligocene ignimbrite in the central Great Basin and Sierra Nevada: Geosphere . de Silva S. , 2008 , Arc magmatism, calderas, and supervolcanoes : Geology , v. 36 , p. 671 – 672 , doi:10.1130/focus082008.1 . Dickinson...
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Journal Article
Journal: Geology
Published: 01 August 2008
Geology (2008) 36 (8): 671–672.
... and their relation to supervolcanoes and the volcano-plutonic connection. Over the past six decades, significant progress has been made in understanding the processes of caldera formation, the geometry of subsidence, and the development of associated magmatic systems (see Williams, 1941 ; McBirney, 1990 ; Smith...
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Journal Article
Journal: Elements
Published: 01 February 2008
Elements (2008) 4 (1): 11–15.
... of Elements , we consider key issues that reflect both the scientific and social importance of these awe-inspiring phenomena: the products and processes of the eruptions themselves, the nature and evolution of the shallow magma chambers that feed them, the monitoring of active supervolcano systems...
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Journal Article
Journal: Elements
Published: 01 February 2008
Elements (2008) 4 (1): 16.
...Calvin Miller; David Wark; Steve Self; Steve Blake; Dave John 3 You mention several post 100 ka candidates. What are they? © 2008 by the Mineralogical Society of America 2008 1 How many supervolcanoes/supereruptions are known? Are there many more than are mentioned in the papers...
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Journal Article
Journal: Elements
Published: 01 February 2008
Elements (2008) 4 (1): 22.
...David A. John Abstract Do supervolcanoes form metallic ore deposits? If so, what types of deposits do they form and how large are they? © 2008 by the Mineralogical Society of America 2008 supervolcano metallic ore deposits hydrothermal systems supervolcano life cycle ash-flow caldera...
FIGURES
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Journal Article
Journal: Elements
Published: 01 February 2008
Elements (2008) 4 (1): 29–34.
... the eruption sequence can be determined. These erupted products and their ordering in time permit reconstruction of the parental magma chamber. Supervolcanoes also have smaller eruptions that provide snapshots of magma chamber development in the lead-in to and aftermath of supereruptions. Many aspects...
FIGURES
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Journal Article
Journal: GSA Bulletin
Published: 25 April 2019
GSA Bulletin (2019) 131 (11-12): 1995–2010.
... magmatism, including supervolcano-scale eruptions, occurred in both the Coastal Maine magmatic province and the Central Maine magmatic belt during two phases of accretion of Avalonia to the margin of North America in the Late Silurian and Early Devonian. The magmatic complexes of both coastal and central...
FIGURES
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Journal Article
Journal: Elements
Published: 01 February 2008
Elements (2008) 4 (1): 35–40.
...Jacob B. Lowenstern; Shaul Hurwitz Abstract Although giant calderas (“supervolcanoes”) may slumber for tens of thousands of years between eruptions, their abundant earthquakes and crustal deformation reveal the potential for future upheaval. Any eventual supereruption could devastate global human...
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Journal Article
Journal: Geology
Published: 01 November 2006
Geology (2006) 34 (11): 937–940.
... Ca. 39 ka ( De Vivo et al., 2001 ), the Campi Flegrei supervolcano ( Sparks et al., 2005 ) underwent a supereruption that produced the Campanian Ignimbrite (CI). More than 150 km 3 dense rock equivalent (DRE) of trachytic magma was erupted, and the event had a volcanic explosivity index of 7...
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Image
Two of the world's largest and most active supervolcanoes in repose. Both volcanoes represent great challenges to forecast. (A) Yellowstone volcano (Wyoming, USA), looking northwest from the north side of the Red Mountains. Lewis (nearer) and Shoshone (farther) lakes are surrounded by the large flat-topped rhyolite lavas of the Central Plateau Member (erupted from ~170-70 ka; see Stelten et al. 2015). The Red Mountains are an uplifted block of ~1 km thick Huckleberry Ridge Tuff, eroded by glacial activity. The mountains in the far distance are the Madison, Gallatin and Absaroka ranges, north of the Yellowstone caldera. (B) Taupo volcano (New Zealand), looking north-northeast from the summit of Pihanga volcano, an extinct stratovolcano rising ~1 km above its surroundings. Lake Taupo infills a collapse caldera mostly created in a major eruption at 25.4 ka. It has seen 28 eruptions since 25.4 ka, most of them from vents down the eastern (right-hand in this view) side of the lake and now concealed beneath its waters (see Barker et al. 2015).
Published: 01 February 2017
F igure 3 Two of the world's largest and most active supervolcanoes in repose. Both volcanoes represent great challenges to forecast. ( A ) Yellowstone volcano (Wyoming, USA), looking northwest from the north side of the Red Mountains. Lewis (nearer) and Shoshone (farther) lakes are surrounded
Image
Cartoon illustrating scenarios for crystal age variations within supervolcano magma reservoirs and their eruption products. Red lines bound regions from which magmas are derived. Age variations are represented by variations in crystal shading (age zonation within crystals is not included). (A) Homogeneous magma reservoir that evolves by progressive magma additions and crystallization. Crystal ages in the supervolcano (τ) represent the duration of magma reservoir accumulation (τ). (B) Progressive inward crystallization of reservoir with oldest crystals closest to the chamber margins. Only the youngest crystals are suspended in the liquid or entrained from the margins of the reservoir during eruption. Supervolcano crystal ages represent only the youngest stage in the evolution of the magma reservoir. (C) Repeated intrusion, partial to complete solidification, and entrainment of crystals from mush and wall rock intrusions during eruption result in a heterogeneous crystal age population. Crystal ages represent the overall duration of the supervolcano magma reservoir more completely than in scenario B but perhaps not as completely as in scenario A.
Published: 01 February 2008
FIGURE 5 Cartoon illustrating scenarios for crystal age variations within supervolcano magma reservoirs and their eruption products. Red lines bound regions from which magmas are derived. Age variations are represented by variations in crystal shading (age zonation within crystals
Journal Article
Journal: Elements
Published: 01 February 2008
Elements (2008) 4 (1): 23–28.
...FIGURE 5 Cartoon illustrating scenarios for crystal age variations within supervolcano magma reservoirs and their eruption products. Red lines bound regions from which magmas are derived. Age variations are represented by variations in crystal shading (age zonation within crystals...
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Journal Article
Journal: Geology
Published: 02 August 2018
Geology (2018) 46 (9): 799–802.
...Ashton F. Flinders; David R. Shelly; Philip B. Dawson; David P. Hill; Barbara Tripoli; Yang Shen Abstract A little more than 760 ka ago, a supervolcano on the eastern edge of California (United States) underwent one of North America’s largest Quaternary explosive eruptions. Over this ∼6-day-long...
FIGURES
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Journal Article
Journal: Geology
Published: 21 March 2019
Geology (2019) 47 (5): 453–456.
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Image
The evolving magmatic system at a young supervolcano: Taupo, New Zealand (for location of Lake Taupo see Fig. 3b). (A) Summary time-volume plot for young eruptions from Taupo (Sutton et al. 2000; Wilson et al. 2006). The Oruanui supereruption accompanied a change in the geographical and temporal positions of compositionally distinctive magma groups at the volcano. Colours in this panel are keyed to the maps in panels (B) and (C). Prior to the Oruanui eruption, contrasting magma groups were present at the same time, as evidenced by intercalation of their eruption products, but were separated geographically (B). In contrast, post-Oruanui eruptions vented within overlapping geographic areas, but magmas with similar compositions (subgroups) were separated in time so that compositions change step-wise through the eruption sequence (C).
Published: 01 February 2008
FIGURE 4 The evolving magmatic system at a young supervolcano: Taupo, New Zealand (for location of Lake Taupo see Fig. 3b ). ( A ) Summary time-volume plot for young eruptions from Taupo ( Sutton et al. 2000 ; Wilson et al. 2006 ). The Oruanui supereruption accompanied a change
Image
The evolving magmatic system at a young supervolcano: Taupo, New Zealand (for location of Lake Taupo see Fig. 3b). (A) Summary time-volume plot for young eruptions from Taupo (Sutton et al. 2000; Wilson et al. 2006). The Oruanui supereruption accompanied a change in the geographical and temporal positions of compositionally distinctive magma groups at the volcano. Colours in this panel are keyed to the maps in panels (B) and (C). Prior to the Oruanui eruption, contrasting magma groups were present at the same time, as evidenced by intercalation of their eruption products, but were separated geographically (B). In contrast, post-Oruanui eruptions vented within overlapping geographic areas, but magmas with similar compositions (subgroups) were separated in time so that compositions change step-wise through the eruption sequence (C).
Published: 01 February 2008
FIGURE 4 The evolving magmatic system at a young supervolcano: Taupo, New Zealand (for location of Lake Taupo see Fig. 3b ). ( A ) Summary time-volume plot for young eruptions from Taupo ( Sutton et al. 2000 ; Wilson et al. 2006 ). The Oruanui supereruption accompanied a change
Image
The evolving magmatic system at a young supervolcano: Taupo, New Zealand (for location of Lake Taupo see Fig. 3b). (A) Summary time-volume plot for young eruptions from Taupo (Sutton et al. 2000; Wilson et al. 2006). The Oruanui supereruption accompanied a change in the geographical and temporal positions of compositionally distinctive magma groups at the volcano. Colours in this panel are keyed to the maps in panels (B) and (C). Prior to the Oruanui eruption, contrasting magma groups were present at the same time, as evidenced by intercalation of their eruption products, but were separated geographically (B). In contrast, post-Oruanui eruptions vented within overlapping geographic areas, but magmas with similar compositions (subgroups) were separated in time so that compositions change step-wise through the eruption sequence (C).
Published: 01 February 2008
FIGURE 4 The evolving magmatic system at a young supervolcano: Taupo, New Zealand (for location of Lake Taupo see Fig. 3b ). ( A ) Summary time-volume plot for young eruptions from Taupo ( Sutton et al. 2000 ; Wilson et al. 2006 ). The Oruanui supereruption accompanied a change
Series: Geological Society, London, Special Publications
Published: 03 January 2024
DOI: 10.1144/SP537-2022-199
EISBN: 9781786205032
... explain the negative and low ε Hf ( t ) values (+0.5 to −13.1) of young samples around the supervolcano Toba as evidence for the subduction of sediment. We argue for a change in the subduction processes, where the first magmatic stage ceased owing to the termination of the Neo-Tethyan subduction...