2021-05-21T14:26:02 n9703

Defining Pre-Eruptive Conditions of the Havre 2012 Submarine Rhyolite Eruption Using Crystal Archives

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The 2012 Havre eruption evacuated a crystal-poor rhyolite (∼3–7% crystals) producing a volumetrically dominant (∼1.4 km3) pumice raft, as well as seafloor giant pumice (5–8%) and lavas (12–14%) at the vent (∼0.1 km3), both of which have subtly higher phenocryst contents. For crystal-poor rhyolites like the Havre pumice, it can often remain ambiguous as to whether the few phenocrysts present, in this case, plagioclase, orthopyroxene, clinopyroxene, Fe-Ti oxides ± quartz, are: (a) autocrysts crystallizing from the surrounding melt, (b) antecrysts being sourced from mush and the magma plumbing system, or (c) xenocrysts derived from source materials or chamber walls, or (d) possibly a combination of all of the above.

In crystal-poor magmas, the few crystals present are strongly relied upon to constrain pre-eruptive conditions such as magmatic temperatures, pressures, water content and fO2. A detailed textural and compositional analysis combined with a range of equilibrium tests and rhyolite-MELTS modeling provide the basis for distinguishing autocrystic vs inherited crystal populations in the Havre eruption.

This dataset consists of the following files, which are also listed in the 'Supplementary Material' section of the paper, 'Defining pre-eruptive conditions of the Havre 2012 submarine rhyolite eruption using crystal archives':

1. Supplementary Materials 1: Sea water contamination removal method

2. Supplementary Materials 2: Havre 2012 pumice raft diversity

3. Supplementary Materials 3: Fe-Ti oxide Mg/Mn equilibrium test

4. Sample raw data

Further information:

  • X-ray Fluorescence spectroscopy (EPMA): Used for whole-rock geochemistry (Table 1).
  • Electron Probe Microanalysis (EPMA): Used for mineral compostion and glass composition (presented in figures and raw data in the paper's Supplementary Material).

Geographical area of data collection

text
Samples are from the Havre 2012 submarine eruption. The samples floated to the eastern coast of Australia and were collected.

Publications

Knafelc, Joseph, Bryan, Scott, Gust, David, & Cathey, Henrietta (2020) Defining pre-eruptive conditions of the Havre 2012 submarine rhyolite eruption using crystal archives. Frontiers in Earth Science, 8, Article number: 310. https://eprints.qut.edu.au/203290/

Research areas

Antecryst
Earth sciences
Crystal-poor rhyolites
Autocryst
Pumice rafts
Havre 2012 eruption

Cite this collection

Bryan, Scott E.; Knafelc, Joseph; Gust, David; Cathey, Henrietta E. (2020): Data_Sheet_1_Defining Pre-eruptive Conditions of the Havre 2012 Submarine Rhyolite Eruption Using Crystal Archives.DOCX. Frontiers. Dataset. https://doi.org/10.3389/feart.2020.00310.s001
Bryan, Scott E.; Knafelc, Joseph; Gust, David; Cathey, Henrietta E. (2020): Data_Sheet_2_Defining Pre-eruptive Conditions of the Havre 2012 Submarine Rhyolite Eruption Using Crystal Archives.docx. Frontiers. Dataset. https://doi.org/10.3389/feart.2020.00310.s002
Bryan, Scott E.; Knafelc, Joseph; Gust, David; Cathey, Henrietta E. (2020): Data_Sheet_3_Defining Pre-eruptive Conditions of the Havre 2012 Submarine Rhyolite Eruption Using Crystal Archives.docx. Frontiers. Dataset. https://doi.org/10.3389/feart.2020.00310.s003
Bryan, Scott E.; Knafelc, Joseph; Gust, David; Cathey, Henrietta E. (2020): Data_Sheet_4_Defining Pre-eruptive Conditions of the Havre 2012 Submarine Rhyolite Eruption Using Crystal Archives.XLSX. Frontiers. Dataset. https://doi.org/10.3389/feart.2020.00310.s004

Licence


Creative Commons Attribution-NonCommercial 4.0 (CC-BY-NC)
http://creativecommons.org/licenses/by-nc/4.0/

Copyright

© Joseph Knafelc, 2020.

Dates of data collection

From 2017 to 2020

Connections

Has association with
David Gust  (Researcher)
Henrietta Cathey  (Researcher)
Scott Bryan  (Researcher)

Contacts

Name: Associate Professor Scott Bryan
Phone: +61 7 3138 4827

Other

Date record created:
2021-05-17T15:01:24
Date record modified:
2021-05-21T14:26:02
Record status:
Published - Open Access