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Budd, David, Fil.dr
Alternative names
Publications (10 of 14) Show all publications
Budd, D. A., Troll, V. R., Deegan, F. M., Jolis, E., Smith, V., Whitehouse, M., . . . Bindeman, I. (2017). Magma reservoir dynamics at Toba caldera, Indonesia, recorded by oxygen isotope zoning in quartz. Scientific Reports, 7, Article ID 40624.
Open this publication in new window or tab >>Magma reservoir dynamics at Toba caldera, Indonesia, recorded by oxygen isotope zoning in quartz
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2017 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, article id 40624Article in journal (Refereed) Published
Abstract [en]

Quartz is a common phase in high-silica igneous rocks and is resistant to post-eruptive alteration, thus offering a reliable record of magmatic processes in silicic magma systems. Here we employ the 75 ka Toba super-eruption as a case study to show that quartz can resolve late-stage temporal changes in magmatic δ18O values. Overall, Toba quartz crystals exhibit comparatively high δ18O values, up to 10.2‰, due to magma residence within, and assimilation of, local granite basement. However, some 40% of the analysed quartz crystals display a decrease in δ18O values in outermost growth zones compared to their cores, with values as low as 6.7‰ (maximum ∆core−rim = 1.8‰). These lower values are consistent with the limited zircon record available for Toba, and the crystallisation history of Toba quartz traces an influx of a low-δ18O component into the magma reservoir just prior to eruption. Here we argue that this late-stage low-δ18O component is derived from hydrothermally-altered roof material. Our study demonstrates that quartz isotope stratigraphy can resolve magmatic events that may remain undetected by whole-rock or zircon isotope studies, and that assimilation of altered roof material may represent a viable eruption trigger in large Toba-style magmatic systems.

National Category
Geochemistry
Identifiers
urn:nbn:se:uu:diva-316065 (URN)10.1038/srep40624 (DOI)000392659100001 ()28120860 (PubMedID)
Funder
Swedish Research CouncilThe Royal Swedish Academy of Sciences
Available from: 2017-02-24 Created: 2017-02-24 Last updated: 2019-09-26Bibliographically approved
Budd, D., Troll, V. R., Dahrén, B. & Burchardt, S. (2016). Persistent multitiered magma plumbing beneath Katla volcano, Iceland. Geochemistry Geophysics Geosystems, 17(3), 966-980
Open this publication in new window or tab >>Persistent multitiered magma plumbing beneath Katla volcano, Iceland
2016 (English)In: Geochemistry Geophysics Geosystems, ISSN 1525-2027, E-ISSN 1525-2027, Vol. 17, no 3, p. 966-980Article in journal (Refereed) Published
Abstract [en]

Recent seismic unrest and a persistent Holocene eruption record at Katla volcano, Iceland indicate that a near-future eruption is possible. Previous petrological investigations suggest that Katla is supplied by a simple plumbing system that delivers magma directly from depth, while seismic and geodetic data also point toward the existence of upper-crustal magma storage. To characterize Katla's recent plumbing system, we established mineral-melt equilibrium crystallization pressures from four age-constrained Katla tephras spanning from 8 kyr BP to 1918. The results point to persistent shallow- (≤8 km depth) as well as deep-crustal (ca. 10 – 25 km depth) magma storage beneath Katla throughout the last 8 kyr. The presence of multiple magma storage regions implies that mafic magma from the deeper reservoir system may become gas-rich during ascent and storage in the shallow crust and erupt explosively. Alternatively, it might intersect evolved magma pockets in the shallow-level storage region, and so increase the potential for explosive mixed-magma ash eruptions.

Place, publisher, year, edition, pages
American Geophysical Union (AGU), 2016
Keywords
Katla volcano; mineral-melt equilibrium thermobarometry; persistent multi-tiered magma plumbing system
National Category
Geology
Research subject
Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics
Identifiers
urn:nbn:se:uu:diva-267448 (URN)10.1002/2015GC006118 (DOI)000375144700019 ()
Funder
Swedish Research CouncilThe Royal Swedish Academy of Sciences
Note

Title in thesis list of papers: Persistent two-tiered magma plumbing beneath Katla volcano, Iceland

Available from: 2015-11-23 Created: 2015-11-23 Last updated: 2019-09-27Bibliographically approved
Deegan, F. M., Whitehouse, M., Troll, V. R., Budd, D. A., Harris, C., Geiger, H. & Hålenius, U. (2016). Pyroxene standards for SIMS oxygen isotope analysis and their application to Merapi volcano, Sunda arc, Indonesia. Chemical Geology, 447, 1-10
Open this publication in new window or tab >>Pyroxene standards for SIMS oxygen isotope analysis and their application to Merapi volcano, Sunda arc, Indonesia
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2016 (English)In: Chemical Geology, ISSN 0009-2541, E-ISSN 1872-6836, Vol. 447, p. 1-10Article in journal (Refereed) Published
Abstract [en]

Measurement of oxygen isotope ratios in common silicate minerals such as olivine, pyroxene, feldspar, garnet, and quartz is increasingly performed by Secondary Ion Mass Spectrometry (SIMS). However, certain mineral groups exhibit solid solution series, and the large compositional spectrum of these mineral phases will result in matrix effects during SIMS analysis. These matrix effects must be corrected through repeated analysis of compositionally similar standards to ensure accurate results. In order to widen the current applicability of SIMS to solid solution mineral groups in common igneous rocks, we performed SIMS homogeneity tests on new augite (NRM-AG-1) and enstatite (NRM-EN-2) reference materials sourced from Stromboli, Italy and Webster, North Carolina, respectively. Aliquots of the standard minerals were analysed by laser fluorination (LF) to establish their δ18O values. Repeated SIMS measurements were then performed on randomly oriented fragments of the same pyroxene crystals, which yielded a range in δ18O less than ± 0.42 and ± 0.58‰ (2σ) for NRM-AG-1 and NRM-EN-2, respectively. Homogeneity tests verified that NRM-AG-1 and NRM-EN-2 do not show any crystallographic orientation bias and that they are sufficiently homogeneous on the 20 μm scale to be used as routine mineral standards for SIMS δ18O analysis. We subsequently tested our new standard materials on recently erupted pyroxene crystals from Merapi volcano, Indonesia. The δ18O values for Merapi pyroxene obtained by SIMS (n = 204) agree within error with the LF-derived δ18O values for Merapi pyroxene but differ from bulk mineral and whole-rock data obtained by conventional fluorination. The bulk samples are offset to higher δ18O values as a result of incorporation of mineral and glass inclusions that in part reflects crustal contamination processes. The Merapi pyroxene SIMS data, in turn, display a frequency peak at 5.8‰, which allows us to estimate the δ18O value of the primary mafic magma at Merapi to ~ 6.1‰ when assuming closed system differentiation.

Keywords
Pyroxene crystals; SIMS standardisation; δ18O analysis; Merapi volcano; Sub-Java primary δ18O
National Category
Geochemistry
Identifiers
urn:nbn:se:uu:diva-309608 (URN)10.1016/j.chemgeo.2016.10.018 (DOI)000390632600001 ()
Funder
Swedish Research CouncilThe Swedish Foundation for International Cooperation in Research and Higher Education (STINT)
Available from: 2016-12-06 Created: 2016-12-06 Last updated: 2019-05-09Bibliographically approved
Troll, V., Deegan, F., Jolis, E. M., Budd, D., Dahrén, B. & Schwarzkopf, L. (2015). Ancient oral tradition describes volcano-earthquake interaction at Merapi volcano, Indonesia.. Geografiska Annaler. Series A, Physical Geography, 97(1), 137-166
Open this publication in new window or tab >>Ancient oral tradition describes volcano-earthquake interaction at Merapi volcano, Indonesia.
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2015 (English)In: Geografiska Annaler. Series A, Physical Geography, ISSN 0435-3676, E-ISSN 1468-0459, Vol. 97, no 1, p. 137-166Article in journal (Refereed) Published
National Category
Geosciences, Multidisciplinary
Research subject
Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics
Identifiers
urn:nbn:se:uu:diva-240752 (URN)10.1111/geoa.12099 (DOI)000350500400010 ()
Available from: 2015-01-08 Created: 2015-01-08 Last updated: 2019-09-25Bibliographically approved
Budd, D. A. (2015). Characterising volcanic magma plumbing systems: A tool to improve eruption forecasting at hazardous volcanoes. (Doctoral dissertation). Uppsala: Acta Universitatis Upsaliensis
Open this publication in new window or tab >>Characterising volcanic magma plumbing systems: A tool to improve eruption forecasting at hazardous volcanoes
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis attempts to develop our understanding of volcanic magma plumbing systems and the magmatic processes that operate within them, such as fractional crystallisation, crustal partial melting, assimilation, and magma mixing. I utilise petrology, rock and mineral geochemistry, and isotope systematics to seek to improve our ability to forecast the eruptive frequency and style of active volcanoes, an aspect often lacking in current volcano monitoring efforts. In particular, magma reservoir dynamics are investigated from a mineral scale at Katla volcano in Iceland, to a sub-mineral scale at Merapi, Kelud, and Toba volcanoes in Indonesia.

The magma plumbing architecture of Katla volcano on Iceland is explored in the first part of this thesis. Crystalline components within tephra and volcanic rock preserve a record of the physical and chemical evolution of a magma, and are analysed through oxygen isotopic and thermobarometric techniques to temporally constrain changes in reservoir depth and decode the petrogenesis of the lavas. We find both prolonged upper crustal magma storage and shallow level assimilation to be occurring at Katla. The results generated from combining these analytical strands reveal the potential for unpredictable explosive volcanism at this lively Icelandic volcano.

The second part of this thesis examines the magma plumbing systems of Merapi, Kelud and Toba volcanoes of the Sunda arc in Indonesia at higher temporal and petrological resolution than possible for Katla (e.g., due to the crystal poor character of the rocks). For this part of the thesis, minerals were analysed in-situ to take advantage of sub-crystal scale isotopic variations in order to investigate processes of shallow-level assimilation in the build-up to particular eruptions. We find that intra-crystal analyses reveal an otherwise hidden differentiation history at these volcanoes, and establish a better understanding as to how they may have rapidly achieved a critical explosive state.

The outcomes of this thesis therefore deepen our knowledge of evolutionary trends in magma plumbing system dynamics, and highlight the importance of understanding the geochemical processes that can prime a volcano for eruption. Lastly, I emphasise the vital contribution petrology can make in current volcano monitoring efforts. 

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2015. p. 42
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1325
Keywords
magma plumbing, oxygen isotopes, thermobarometry, crustal assimilation, Katla, Merapi, Kelud, Toba, volcanic hazards
National Category
Geology
Research subject
Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics
Identifiers
urn:nbn:se:uu:diva-267473 (URN)978-91-554-9424-7 (ISBN)
Public defence
2016-01-22, Hambergsalen, Geocentrum, Villavägen 16, Uppsala, 10:00 (English)
Opponent
Supervisors
Available from: 2015-12-17 Created: 2015-11-23 Last updated: 2016-01-13
Troll, V., Deegan, F., Jolis, E. M., Budd, D. & Schwarzkopf, L. (2014). Ancient oral tradition describes volcano-earthquake interaction at Merapi volcano, Indonesia. In: : . Paper presented at City On volcanoes.
Open this publication in new window or tab >>Ancient oral tradition describes volcano-earthquake interaction at Merapi volcano, Indonesia
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2014 (English)Conference paper, Oral presentation only (Refereed)
National Category
Geology Geosciences, Multidisciplinary
Research subject
Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics
Identifiers
urn:nbn:se:uu:diva-240929 (URN)
Conference
City On volcanoes
Available from: 2015-01-08 Created: 2015-01-08 Last updated: 2015-01-08
Budd, D., Troll, V., Dahrén, B. & Burchardt, S. (2014). Persistent shallow magma storage beneath Katla volcano. In: : . Paper presented at Goldschmidt Annual Meeting (Sacramento, USA).
Open this publication in new window or tab >>Persistent shallow magma storage beneath Katla volcano
2014 (English)Conference paper, Oral presentation only (Refereed)
National Category
Geosciences, Multidisciplinary
Research subject
Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics
Identifiers
urn:nbn:se:uu:diva-240412 (URN)
Conference
Goldschmidt Annual Meeting (Sacramento, USA)
Available from: 2015-01-07 Created: 2015-01-07 Last updated: 2015-01-08
Deegan, F., Troll, V., Jolis, E. M., Freda, C., Hilton, D., Budd, D., . . . Zimmer, M. (2014). The role of CO2-rich basement at Merapi; perspectives from petrology, geochemistry, and experiments. In: : . Paper presented at City on volcanoes.
Open this publication in new window or tab >>The role of CO2-rich basement at Merapi; perspectives from petrology, geochemistry, and experiments
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2014 (English)Conference paper, Oral presentation only (Refereed)
National Category
Geology Geosciences, Multidisciplinary
Research subject
Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics
Identifiers
urn:nbn:se:uu:diva-240866 (URN)
Conference
City on volcanoes
Available from: 2015-01-08 Created: 2015-01-08 Last updated: 2015-01-08
Budd, D., Troll, V., Jolis, E. M. & Deegan, F. (2014). Toba super-eruption fuelled by catastrophic roof disintegration. In: : . Paper presented at Cities on Volcanoes 8 (Yogyakarta, Indonesia) meeting.
Open this publication in new window or tab >>Toba super-eruption fuelled by catastrophic roof disintegration
2014 (English)Conference paper, Oral presentation only (Refereed)
National Category
Geosciences, Multidisciplinary
Research subject
Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics
Identifiers
urn:nbn:se:uu:diva-240409 (URN)
Conference
Cities on Volcanoes 8 (Yogyakarta, Indonesia) meeting
Available from: 2015-01-07 Created: 2015-01-07 Last updated: 2015-01-08
Troll, V., Klügel, A., Longpré, M.-A., Burchardt, S., Deegan, F., Carracedo, J., . . . Pedroza, K. (2012). Floating stones off El Hierro, Canary Islands: xenoliths of pre-island sedimentary origin in the early products of the October 2011 eruption. Solid Earth, 3(1), 97-110
Open this publication in new window or tab >>Floating stones off El Hierro, Canary Islands: xenoliths of pre-island sedimentary origin in the early products of the October 2011 eruption
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2012 (English)In: Solid Earth, ISSN 1869-9510, E-ISSN 1869-9529, Vol. 3, no 1, p. 97-110Article in journal (Refereed) Published
Abstract [en]

A submarine eruption started off the south coast of El Hierro, Canary Islands, on 10 October 2011 and continues at the time of this writing (February 2012). In the first days of the event, peculiar eruption products were found floating on the sea surface, drifting for long distances from the eruption site. These specimens, which have in the meantime been termed "restingolites" (after the close-by village of La Restinga), appeared as black volcanic "bombs" that exhibit cores of white and porous pumice-like material. Since their brief appearance, the nature and origin of these "floating stones" has been vigorously debated among researchers, with important implications for the interpretation of the hazard potential of the ongoing eruption. The "restingolites" have been proposed to be either (i) juvenile high-silica magma (e. g. rhyolite), (ii) remelted magmatic material (trachyte), (iii) altered volcanic rock, or (iv) reheated hyaloclastites or zeolite from the submarine slopes of El Hierro. Here, we provide evidence that supports yet a different conclusion. We have analysed the textures and compositions of representative "restingolites" and compared the results to previous work on similar rocks found in the Canary Islands. Based on their high-silica content, the lack of igneous trace element signatures, the presence of remnant quartz crystals, jasper fragments and carbonate as well as wollastonite (derived from thermal overprint of carbonate) and their relatively high oxygen isotope values, we conclude that "restingolites" are in fact xenoliths from pre-island sedimentary layers that were picked up and heated by the ascending magma, causing them to partially melt and vesiculate. As they are closely resembling pumice in appearance, but are xenolithic in origin, we refer to these rocks as "xeno-pumice". The El Hierro xeno-pumices hence represent messengers from depth that help us to understand the interaction between ascending magma and crustal lithologies beneath the Canary Islands as well as in similar Atlantic islands that rest on sediment-covered ocean crust (e. g. Cape Verdes, Azores). The occurrence of "restingolites" indicates that crustal recycling is a relevant process in ocean islands, too, but does not herald the arrival of potentially explosive high-silica magma in the active plumbing system beneath El Hierro.

Place, publisher, year, edition, pages
Copernicus Publications, 2012
National Category
Geology Geochemistry
Identifiers
urn:nbn:se:uu:diva-171483 (URN)10.5194/se-3-97-2012 (DOI)000309884400008 ()
Funder
Swedish Research Council
Note

Correction in Solid Earth. Vol. 3(2) p. 189. DOI: 10.5194/se-3-189-2012

Available from: 2012-03-19 Created: 2012-03-19 Last updated: 2019-10-03Bibliographically approved
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