Silicate melt inclusions in the new millennium: A review of recommended practices for preparation, analysis, and data presentation

Rose-Koga, Estelle; Bouvier, Anne‐Sophie; Gaetani, G. A.; Wallace, Paul; Allison, C. M.; Andrys, J.; Torre, C. A. Angeles De La; Barth, Anna; Bodnar, Robert J.; Gartner, A.J.J. Bracco; Butters, Damaris; Castillejo, Adela; Chilson-Parks, Benjamin H.; Choudhary, Babita Rani; Cluzel, Nicolas; Cole, M. J.; Cottrell, Elizabeth; Daly, A.R.; Danyushevsky, L. V.; DeVitre, Charlotte; Drignon, Mélissa J.; France, Lydéric; Gaborieau, M.; Garcia, Michael O.; Gatti, Emma; Genske, Felix; Hartley, Margaret E.; Hughes, Ery; Iveson, Alexander A.; Johnson, E. R.; Jones, M.; Kagoshima, Takanori; Katzir, Yaron; Kawaguchi, Masataka; Kawamoto, Tatsuhiko; Kelley, K.A.; Koornneef, Janne M.; Kurz, Mark D.; Laubier, Muriel; Layne, Graham D.; Lerner, Allan; Lin, Kuan-Yu; Liu, P.-P.; Lorenzo-Merino, A.; Luciani, Natascia; Magalhães, Nívea; Marschall, Horst R.; Michael, P.J.; Monteleone, B. D.; Moore, Lowell R.; Moussallam, Yves; Muth, Michelle; Myers, M.; Narváez, Diego; Navon, O.; Newcombe, Megan; Nichols, A. R.; Nielsen, Roger L.; Pamukcu, A. S.; Plank, Terry; Rasmussen, Daniel J.; Roberge, Julie; Schiavi, Federica; Schwartz, D. M.; Shimizu, Kenji; Shimizu, Nobumichi; Thomas, Jay B.; Thompson, Glenn T.; Tucker, J.; Üstünışık, Gökçe; Waelkens, Clara M.; Zhang, Yuxiang; Zhou, Taihe

doi:10.1016/j.chemgeo.2021.120145

Cited by 57 publications

(29 citation statements)

References 227 publications

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“…These results illustrate the importance of documenting not only the focused spot size used in V XAFS analysis of silicate glasses but the incident flux as well, so that the flux density can be estimated. This is a recommendation that has also been made for all XAFS analyses of magmatic melt inclusions (Rose-Koga et al 2021).…”

Section: Discussionmentioning

confidence: 99%

Radiation-induced changes in vanadium speciation in basaltic glasses: Implications for oxybarometry measurements using vanadium K-edge X-ray absorption spectroscopy

Lanzirotti,

Sutton,

Newville

et al. 2022

American Mineralogist

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Magmatic oxygen fugacity (fO 2 ) exerts a primary control on the discrete vanadium (V) valence states that will exist in quenched melts. Vanadium valence proxies for fO 2 , measured using X-ray absorption near-edge spectroscopy (XANES), can provide highly sensitive determinations of the redox conditions in basaltic melts. However, X-ray beam-induced changes in V speciation will introduce uncertainty in the calculated average V valence (V*) that must be properly evaluated in order to make meaningful interpretations of the igneous evolution of the system. The study presented here showed that beam-induced modifications in V speciation are observed in silicate glasses that are dependent on the radiation dose rate used during analysis.Changes in V speciation are observed to be most pronounced at the highest flux density tested, 9.25 x10 11 ph/s/µm 2 (photons per second per square micrometer), with rapid changes occurring in the first 200s of analysis. The high dose rate conditions result in changes in calculated V* ~0.3 valence unit for the most oxidized glass analyzed (V* = 4.94), which can correspond to ~ 0.5 log unit reduction in calculated fO 2 . However, at flux densities ≤ 1.13x10 9 ph/s/μm 2 , measured changes in V* were found to be < 0.03 for all standard glasses analyzed. The degree of reduction observed during analysis is also found to be progressively smaller as the initial V* of the glass This is the peer-reviewed, final accepted version for American Mineralogist, published by the Mineralogical Society of America.The published version is subject to change. Cite as Authors (Year) Title. American Mineralogist, in press.

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Section: Discussionmentioning

confidence: 99%

Radiation-induced changes in vanadium speciation in basaltic glasses: Implications for oxybarometry measurements using vanadium K-edge X-ray absorption spectroscopy

Lanzirotti,

Sutton,

Newville

et al. 2022

American Mineralogist

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“…Full analytical and calculation details are in Supplementary Material. Data collection and reporting for melt inclusions broadly follows the guidelines of Rose-Koga et al (2021).…”

Section: Methodsmentioning

confidence: 99%

Storage, evolution, and mixing in basaltic eruptions from around the Okataina Volcanic Centre, Taupō Volcanic Zone, Aotearoa New Zealand

Hughes¹,

Law²,

Kilgour³

et al. 2022

Preprint

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The Okataina Volcanic Centre (OVC) is the most recently active rhyolitic volcanic centre in the Taupō Volcanic Zone, Aotearoa New Zealand. Although best known for its high rates of explosive rhyolitic volcanism, there are numerous examples of basaltic to basaltic-andesite contributions to OVC eruptions, ranging from minor involvement of basalt in rhyolitic eruptions to the exclusively basaltic 1886 C.E. Plinian eruption of Tarawera. To explore the basaltic component supplying this dominantly rhyolitic area, we analyse the textures and compositions (minerals and melt inclusions) of four basaltic eruptions within the OVC that have similar whole rock chemistry, namely: Terrace Rd, Rotomakariri, Rotokawau, and Tarawera. Data from these basaltic deposits provide constraints on the conditions of magma evolution and ascent in the crust prior to eruption, revealing that at least five different magma types (two basalts, two dacites, one rhyolite) are sampled during basaltic eruptions. The most abundant basaltic magma type is generated by cooling-induced crystallisation of a common, oxidised, basaltic melt at various depths throughout the crust. The volatile content of this melt was increased by protracted fluid-undersaturated crystallisation. All eruptions display abundant evidence for syn-eruptive mixing of the different magma types. Rotomakariri, consisting of a mafic crystal cargo mixed into a dacitic magma is the most extreme example of this process. Despite similar bulk compositions, comparable to other basaltic deposits in the region, these four OVC eruptions are texturally distinct as a consequence of their wide variation in eruption style.

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“…Major elements in melt inclusions and olivines were measured by electron microprobe using a Cameca SXFive-TACTIS at the Laboratoire Magmas et Volcans (Clermont-Ferrand, France). Melt inclusions were analyzed using a defocused 10 μm beam, at 8 nA and 15 kV, whereas olivine grains were measured with a focused beam at 15 nA and 15kV, following the procedure described in Rose-Koga et al (2021). Sulfur and Cl were also determined in melt inclusions using a 10-μm beam at 40 nA, 15 kV.…”

Section: Electron Microprobementioning

confidence: 99%

Deciphering Degassing and Source Effects in Cl Isotopes in Melt Inclusions: The Possible Role of Amphibole in the Magma Source of Stromboli (Aeolian Island Arc)

2022

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Chlorine isotopes have emerged as a new geochemical tool over the past 15 years. Most of the data consist of bulk rock data, with a minority carried out in situ on melt inclusions using secondary ion mass spectrometry. More data are necessary to understand the relationship between δ37Cl measured in melt inclusions and that in bulk rocks from the same volcanic center. Here we have analyzed a suite of melt inclusions entrapped in olivine Fo63-85, as well as some from clinopyroxene crystals, from a single hand-sample from the Vancori unit of Stromboli, Aeolian Islands. The 27 selected melt inclusions have major element compositions ranging from high potassium alkali basalt to evolved shoshonite. Their δ37Cl vary from −2.6 ± 0.1‰ to +1.2 ± 0.2‰, a far larger range than for Stromboli bulk rocks. In this dataset, the δ37Cl variation in melt inclusions is not related to Cl degassing, or to fractional crystallization. Instead, correlations between δ37Cl and S/Cl, K2O and trace element ratios suggest mixing of two Cl endmembers with distinct δ37Cl signatures. A first endmember is characterized by high potassium alkali basalt compositions, high Ba/La (∼28), high S/Cl, and high δ37Cl (>1‰), confirming the influence in the mantle source of an aqueous fluid and providing a new constraint on its composition: that it derives from the breakdown of amphibole. The second endmember has a more evolved composition, high La/Yb, low S/Cl, and low δ37Cl (<−2‰), identifying the influence of a solute-rich component derived from subducted sediments. The δ37Cl data thus help refine the two sources initially identified from bulk rock studies and δ37Cl proves to be a potential tracer for amphibole.

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Silicate melt inclusions in the new millennium: A review of recommended practices for preparation, analysis, and data presentation

Cited by 57 publications

References 227 publications

Radiation-induced changes in vanadium speciation in basaltic glasses: Implications for oxybarometry measurements using vanadium K-edge X-ray absorption spectroscopy

Radiation-induced changes in vanadium speciation in basaltic glasses: Implications for oxybarometry measurements using vanadium K-edge X-ray absorption spectroscopy

Storage, evolution, and mixing in basaltic eruptions from around the Okataina Volcanic Centre, Taupō Volcanic Zone, Aotearoa New Zealand

Deciphering Degassing and Source Effects in Cl Isotopes in Melt Inclusions: The Possible Role of Amphibole in the Magma Source of Stromboli (Aeolian Island Arc)

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