Deep and disturbed: conditions for formation and eruption of a mingled rhyolite at Ascension Island, south Atlantic

Journal article


Chamberlain, Katy J., Barclay, Jenni, Preece, Katie, Brown, Richard J., McIntosh, Iona and EIMF 2020. Deep and disturbed: conditions for formation and eruption of a mingled rhyolite at Ascension Island, south Atlantic. Volcanica. https://doi.org/10.30909/vol.03.01.139153
AuthorsChamberlain, Katy J., Barclay, Jenni, Preece, Katie, Brown, Richard J., McIntosh, Iona and EIMF
Abstract

The generation of felsic melts (through open or closed system processes) within ocean island volcanoes has been a key area of study since their identification. At Ascension Island in the south Atlantic, explosively erupted felsic melts have, to date, demonstrated a marked absence of signs of magma mixing and crustal assimilation. Here we present the first observations of a fall deposit from Ascension Island recording both macro- and micro-scale evidence for magma mingling. Geochemical analyses of mineral and glass phases, coupled with volatile concentrations of melt inclusions highlight the role of lower-crustal partial melting to produce rhyolitic magmas. Glass textures and the lack of zoning in major mineral phases indicate that mingling with a mafic melt occurred shortly prior to eruption. These inferences of a deep rhyolite production zone, coupled with rapid ascent rates highlight the challenges in forecasting a similar style of eruption at Ascension Island in the future.

KeywordsMagma mingling; Ascension Island; Crustal melting; Magma genesis
Year2020
JournalVolcanica
PublisherPresses universitaires de Strasbourg
ISSN2610-3540
Digital Object Identifier (DOI)https://doi.org/10.30909/vol.03.01.139153
Web address (URL)http://hdl.handle.net/10545/624811
hdl:10545/624811
Publication dates05 May 2020
Publication process dates
Deposited22 May 2020, 16:02
Accepted17 Mar 2020
ContributorsUniversity of Derby, University of East Anglia, Swansea University, Durham University, JAMSTEC and University of Edinburgh
File
File Access Level
Open
File
File Access Level
Open
File
File Access Level
Open
Permalink -

https://repository.derby.ac.uk/item/93q74/deep-and-disturbed-conditions-for-formation-and-eruption-of-a-mingled-rhyolite-at-ascension-island-south-atlantic

Download files

  • 27
    total views
  • 19
    total downloads
  • 1
    views this month
  • 0
    downloads this month

Export as

Related outputs

Effect of crustal stress state on magmatic stalling and ascent: case study from Puyehue-Cordón Caulle, Chile
Chamberlain, K., Morgan, D. J., Lara, L. E., Walshaw, R., Gardner, J. and Chenery, S. 2024. Effect of crustal stress state on magmatic stalling and ascent: case study from Puyehue-Cordón Caulle, Chile. Bulletin of Volcanology. 86 (53), pp. 1-18. https://doi.org/10.1007/s00445-024-01740-w
Time to change the data culture in geochemistry
Chamberlain, Katy J., Lehnert, Kerstin, McIntosh, Iona, Morgan, Daniel J. and Worner, Gerhard 2021. Time to change the data culture in geochemistry. Nature Reviews in Earth and Environment. https://doi.org/10.1038/s43017-021-00237-w
Zircon geochronological and geochemical insights into pluton building and volcanic-hypabyssal-plutonic connections: Oki-Dōzen, Sea of Japan - a complex intraplate alkaline volcano
Scarrow, Jane, Chamberlain, Katy J., Montero, Pilar, Horstwood, Matthew S.A., Kimura, Jun-Ichi, Tamura, Yoshihiko, Chang, Qing and Barclay, Jenni 2021. Zircon geochronological and geochemical insights into pluton building and volcanic-hypabyssal-plutonic connections: Oki-Dōzen, Sea of Japan - a complex intraplate alkaline volcano. American Mineralogist. https://doi.org/10.2138/am-2022-7861
Explosive felsic eruptions on ocean islands: a case study from Ascension Island (South Atlantic)
Preece, Katie, Barclay, Jenni, Brown, Richard J., Chamberlain, Katy and Mark, Darren F. 2021. Explosive felsic eruptions on ocean islands: a case study from Ascension Island (South Atlantic). Journal of Volcanology and Geothermal Research. https://doi.org/10.1016/j.jvolgeores.2021.107284
No single model for super-sized eruptions and their magma bodies
Wilson, C., Cooper, George F, Chamberlain, Katy, Barker, Simon J, Myers, Madison L., Illsley-Kemp, Finnigan and Farrell, Jamie 2021. No single model for super-sized eruptions and their magma bodies. Nature Reviews in Earth and Environment. https://doi.org/10.1038/s43017-021-00191-7
Health Benefits of Ikigai: A Review of Literature
Kotera, Y., Kaluzeviciute, G., Garip, Gulcan, McEwan, Kirsten and Chamberlain, Katy 2021. Health Benefits of Ikigai: A Review of Literature. in: Concurrent Disorders Society Publishing.
Rapid assembly of high-Mg andesites and dacites by magma mixing at a continental arc stratovolcano
Conway, Chris, Chamberlain, Katy J., Harigane, Yumiko, Morgan, Daniel and Wilson, Colin 2020. Rapid assembly of high-Mg andesites and dacites by magma mixing at a continental arc stratovolcano. Geology. https://doi.org/10.1130/G47614.1
Lower crustal heterogeneity and fractional crystallisation control evolution of small volume magma batches at ocean island volcanoes (Ascension Island, South Atlantic)
Chamberlain, Katy J., Barclay, Jenni, Preece, Katie, Brown, Richard J. and Davidson, Jon P. 2019. Lower crustal heterogeneity and fractional crystallisation control evolution of small volume magma batches at ocean island volcanoes (Ascension Island, South Atlantic). Journal of Petrology. https://doi.org/10.1093/petrology/egz037
Bridging the gap: 40Ar/39Ar dating of volcanic eruptions from the ‘Age of Discovery’
Preece, Katie, Mark, Darren F., Barclay, Jenni, Cohen, Benjamin E., Chamberlain, Katy J., Jowitt, Claire, Vye-Brown, Charlotte, Brown, Richard J. and Hamilton, Scott 2018. Bridging the gap: 40Ar/39Ar dating of volcanic eruptions from the ‘Age of Discovery’. Geology. 46 (12), pp. 1035-1038. https://doi.org/10.1130/g45415.1
Origin and evolution of silicic magmas at ocean islands: Perspectives from a zoned fall deposit on Ascension Island, South Atlantic.
Chamberlain, Katy J., Barclay, Jenni, Preece, Katie, Brown, Richard J. and Davidson, Jon P. 2016. Origin and evolution of silicic magmas at ocean islands: Perspectives from a zoned fall deposit on Ascension Island, South Atlantic. Journal of Volcanology and Geothermal Research. https://doi.org/10.1016/j.jvolgeores.2016.08.014
Micro-analytical perspectives on the Bishop Tuff and its magma chamber.
Chamberlain, Katy J., Wilson, Colin J. N., Wallace, Paul J. and Millet, Marli Bryant 2015. Micro-analytical perspectives on the Bishop Tuff and its magma chamber. Journal of Petrology. https://doi.org/10.1093/petrology/egv012
Timescales of mixing and mobilisation in the Bishop Tuff magma body: perspectives from diffusion chronometry.
Chamberlain, Katy J., Morgan, Daniel J. and Wilson, Colin J. N. 2014. Timescales of mixing and mobilisation in the Bishop Tuff magma body: perspectives from diffusion chronometry. Contributions to Mineralogy and Petrology. https://doi.org/10.1007/s00410-014-1034-2
New perspectives on the Bishop Tuff from zircon textures, ages and trace elements.
Chamberlain, Katy J., Wilson, Colin J. N., Wooden, Joseph L., Charlier, Bruce L. A. and Ireland, Trevor R. 2013. New perspectives on the Bishop Tuff from zircon textures, ages and trace elements. Journal of Petrology. https://doi.org/10.1093/petrology/egt072