dc.contributor.author |
Shane, Phil |
|
dc.contributor.author |
Costa, Fidel |
|
dc.contributor.author |
Cronin, Shane |
|
dc.contributor.author |
Stirling, Claudine |
|
dc.contributor.author |
Reid, Malcolm |
|
dc.date.accessioned |
2023-10-05T23:31:57Z |
|
dc.date.available |
2023-10-05T23:31:57Z |
|
dc.date.issued |
2023-08-15 |
|
dc.identifier.citation |
(2023). Bulletin of Volcanology, 85(9), 47-. |
|
dc.identifier.issn |
0258-8900 |
|
dc.identifier.uri |
https://hdl.handle.net/2292/66169 |
|
dc.description.abstract |
Plagioclase phenocrysts in pre-historic andesites provide insight to the dynamics of magma formation and eruption at Taranaki volcano, New Zealand. The phenocryst population has a diversity of relic cores and a total in situ 87Sr/86Sr range of 0.70440–0.70486. Within-sample 87Sr/86Sr variations of 0.00018 to 0.00043 indicate that many phenocrysts are antecrysts and/or xenocrysts, derived from multiple crystal mush bodies. The Sr-isotopic differences in the phenocrysts of consecutive eruptions indicate that different magmas were tapped or formed on a centennial timescale. Most phenocrysts have multiple resorption/calcic regrowth zone(s) with elevated FeO* but invariant MgO zonation profiles. They likely record mafic melt inputs, and subsequent storage at elevated temperature caused re-equilibration of the Mg gradient. However, distinct rim types record different final pre/syn-eruptive magmatic conditions. Those in magmas erupted at 1030–1157 CE, 1290–1399 CE and 1780–1800 CE are characterised by resorption and calcic regrowth with sharp MgO and FeO* gradients. They record the entry of mafic melt into the system a few days or less before eruption based on Mg diffusion chronometry. In contrast, most phenocrysts erupted at 1755 CE, 1655 CE, and a few pre-1 ka events, have texturally uniform rims, compositionally consistent with closed-system crystallisation. This suggests alternating external and internal eruption triggers. Alternatively, the rate of magma reactivation via intrusion may dictate whether there was sufficient time for a mineralogical response to be recorded in part or all of the system. With respect to anticipating future eruptions, the plagioclase phenocrysts suggest multi-stage magma priming but rapid onset of the final trigger. |
|
dc.language |
en |
|
dc.publisher |
Springer Nature |
|
dc.relation.ispartofseries |
Bulletin of Volcanology |
|
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
|
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
|
dc.rights.uri |
https://creativecommons.org/licenses/by/4.0/ |
|
dc.subject |
37 Earth Sciences |
|
dc.subject |
3703 Geochemistry |
|
dc.subject |
3705 Geology |
|
dc.subject |
3706 Geophysics |
|
dc.subject |
Science & Technology |
|
dc.subject |
Physical Sciences |
|
dc.subject |
Geosciences, Multidisciplinary |
|
dc.subject |
Geology |
|
dc.subject |
Eruption triggering |
|
dc.subject |
Antecryst |
|
dc.subject |
Plagioclase |
|
dc.subject |
Diffusion chronometry |
|
dc.subject |
New Zealand |
|
dc.subject |
Sr isotopes |
|
dc.subject |
EGMONT VOLCANO |
|
dc.subject |
NEW-ZEALAND |
|
dc.subject |
TEMPORAL EVOLUTION |
|
dc.subject |
NORTH-ISLAND |
|
dc.subject |
MT. TARANAKI |
|
dc.subject |
DIFFUSION |
|
dc.subject |
ORIGIN |
|
dc.subject |
MELT |
|
dc.subject |
INTRUSION |
|
dc.subject |
TRACE |
|
dc.subject |
0403 Geology |
|
dc.title |
Priming and eruption of andesite magmas at Taranaki volcano recorded in plagioclase phenocrysts |
|
dc.type |
Journal Article |
|
dc.identifier.doi |
10.1007/s00445-023-01661-0 |
|
pubs.issue |
9 |
|
pubs.begin-page |
47 |
|
pubs.volume |
85 |
|
dc.date.updated |
2023-09-12T21:48:00Z |
|
dc.rights.holder |
Copyright: The authors |
en |
pubs.publication-status |
Published online |
|
dc.rights.accessrights |
http://purl.org/eprint/accessRights/OpenAccess |
en |
pubs.subtype |
Article |
|
pubs.subtype |
Journal |
|
pubs.elements-id |
981735 |
|
pubs.org-id |
Science |
|
pubs.org-id |
School of Environment |
|
dc.identifier.eissn |
1432-0819 |
|
pubs.number |
47 |
|
pubs.record-created-at-source-date |
2023-09-13 |
|
pubs.online-publication-date |
2023-08-15 |
|