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Radiogenic isotope compositions of eruption products from the 2019 paroxysmal eruptions at Stromboli Volcano

The periodic volcanic activity of Stromboli Volcano, Aeolian Islands, Italy, is interrupted by paroxysmal eruptions on a decadal interval. In 2019, two strong paroxysms on July 3rd and August 28th, ended a more than a decade long period of regular strombolian activity. During normal strombolian activity the volcano erupts highly porphyritic scoria and lava (HP) with a shoshonitic basalt composition. In paroxysmal eruptions the HP material is mingled with low porphyritic (LP) pumices. This dataset includes the first radiogenic isotope data on the bulk compositions of the LP and HP components erupted on July 3rd 2019, and a HP sample from the lava flow that followed the paroxysm, and a LP sample from the paroxysm on August 28th 2019. The analyzed radiogenic isotope ratios include Sr, Nd, Hf, and Pb. This dataset further includes in-situ EPMA and LA-ICP_MS measurements of major and trace elements in the glass, olivine, plagioclase and clinopyroxene phases.

Mo, Sr, Nd isotopes and major and trace element concentrations for lavas and enclaves from Solander Volcano, basement rocks and one altered oceanic basalt

Other

W isotope, Nd isotope, major and trace element data from the Badampahar and Onverwacht Groups, Kaapvaal and Singhbhum Cratons

The dataset contains major and trace element data as well as radiogenic W isotope data for >3.5 Ga felsic to ultramafic volcanic rocks from the Kaapvaal and Singhbhum Cratons. For the Kaapvaal Craton additional 143Nd data is provided. Major elements were analysed by XRF at Würzburg University and the School of Geological Sciences, University of KwaZulu-Natal; trace elements by ICP:MS at Georg-August Universität Göttingen, Department for Geochemistry and Isotope Geology; radiogenic W and 143Nd isotopic data were measured by ICP:MS-MC at Georg-August Universität Göttingen, Department for Geochemistry and Isotope Geology. These data are published as a supplement to Messling et al. (2023), Mobilization of Tungsten in Greenstone Belts of the Archaean Kaapvaal and Singhbhum Cratons, Geochemistry, Geophysics, Geosystems, 24(2),(https://doi.org/10.1029/2023GC011161). A subset of these data were previously published in Jodder (2021), The geology of the Daitari Greenstone Belt, Singhbhum Craton, India - insights into early life 3.5 Ga ago, Doctoral thesis, University of Johannesburg, https://hdl.handle.net/10210/477262 This work was funded by the German Research Foundation (DFG Grant WI 3579/3-1).

Calibration and Method Validation for Strontium (Sr) Isotope Ratio Measurements performing by ThermoFisher Neptune Plus Mass Spectrometer in the NEPTUNE-TIMS Laboratory (Istituto di Geoscienze e Georisorse, CNR di Pisa)

Results of a high throughput, robust and sensitive method for the precise analysis of 87Sr/86Sr by Multi-Collector-Inductively Coupled Plasma-Mass Spectrometer (MC-ICP-MS), Thermo Scientific Neptune PlusTM are reported. The data were obtained after accurate procedures of chemical separation and purification of Sr from geological matrices such as silicates, sulfides, carbonates and waters, using Eichrom Sr-spec resins as well as the routine for Sr isotope measurement. Mass discrimination and instrument drift were corrected by using natural constant 86Sr/88Sr ratios as an internal standard. Data on set of international certified standard materials (SRM NIST 987 and AGV-1) as well as intra-lab reference samples (water sample KGV-9) measured with MC-ICP-MS Neptune Plus, focusing on the accuracy and reproducibility of the analyses performed in the Neptune-TIMS Laboratory are here reported.

Calibration and Method Validation for Lead (Pb) Isotope Ratio Measurements performing by ThermoFisher Neptune Plus Mass Spectrometer in the NEPTUNE-TIMS Laboratory (Istituto di Geoscienze e Georisorse, CNR di Pisa)

We describe here in detail the results and the setup of the high precision Pb isotope ratio analysis performed by Multi Collector Inductively Coupled Plasma Mass Spectrometer (MC ICP MS), Thermo Scientific Neptune Plus TM. We performed this method adding thallium (Tl) as an internal isotopic standard to correct mass dependent isotopic fractionation. We also report the procedures for the chemical separat ion and purification of Pb from geological matri ces such as silicates , sulfides and historical artefacts . We report the data obtained on the international certified standard material SRM NIST 981 measured with MC ICP MS Neptune Plus, focusing on the accuracy and reproducibility of the analyses performed in the Neptune TIMS Laboratory (IGG-CNR in Pisa, Italy), and highlighting the advantages brought by the installation of this new mass spectrometer.

Calibration and Method Validation for Neodymium (Nd) Isotope Ratio Measurements performing by ThermoFisher Neptune Plus Mass Spectrometer in the NEPTUNE-TIMS Laboratory (Istituto di Geoscienze e Georisorse, CNR di Pisa)

We describe here in detail the results and the setup of the high precision Nd isotope ratio analysis performed by Multi Collector Inductively Coupled Plasma Mass Spectrometer (MC ICP MS), Thermo Scientific Neptune Plus TM. Isobaric interferences and mass discrimination were corrected by using natural invariable 147Sm/144Sm and 146Nd/144Nd isotope ratios. We reported data on set of international certified standard materials (JNdi-1 and AGV-1) measured with MC-ICP-MS Neptune Plus, focusing on the accuracy and reproducibility of the analyses performed in the Neptune-TIMS Laboratory

Calibration and Method Validation for Boron (B) Isotope Ratio Measurements performing by ThermoFisher Neptune Plus Mass Spectrometer in the NEPTUNE-TIMS Laboratory (Istituto di Geoscienze e Georisorse, CNR di Pisa)

A low blank, high-precision, and highly reproducible technique for Boron (B) isotope analysis performed by Multi-Collector-Inductively Coupled Plasma-Mass Spectrometer (MC-ICP-MS), Thermo Scientific Neptune PlusTM was developed and is presented here. We show data on a set of international certified standard materials (NIST SRM 951) and various kind of matrices (B1-IAEA, B2-IAEA, B3-IAEA, B4-IAEA, B5-IAEA, and JB-2) measured with MC-ICP-MS Neptune Plus, focusing on the accuracy and reproducibility of the analyses performed in the Neptune-TIMS Laboratory

Verknüpfung hydrogeochemischer und mikrobiell katalysierter Prozesse in der Arsen-Schwefel-Redoxchemie alkalischer geothermaler Quellen im Yellowstone Nationalpark

Zielstellung des vorliegenden Projektes ist es, das Zusammenspiel zwischen abiotischen und mikrobiell katalysierten Umwandlungen von Arsen- und Schwefelspezies unter Zunahme des Sauerstoffs und Abnahme der Temperatur zu bestimmen. Dazu werden insgesamt ca. 5-10 alkalische heiße Quellen und deren Abflusssysteme im Yellowstone National Park ausgewählt und folgende Einzelprojekte durchgeführt: - Charakterisierung mikrobieller Gemeinschaften aus hoch auflösenden (0.1-0.5 cm Pixelgröße) Luftbildern, die mittels eines Heliumballons selbst über den Quellen aufgenommen werden (Erfahrungen dazu hat meine Gruppe aus 3 anderen Projekten zur Kartierung hydrothermaler Features in Yellowstone); Kartierung und Wasserprobenahme zur Charakterisierung mittels DGGE (denaturierende Gradientengelelektrophorese, vorhanden an Uni Bozeman) - Speziierung von Arsen und Schwefel mittels IC-ICP-MS (Gerät wird 2008 angeschafft im Rahmen meiner DFG Emmy Noether Förderung) in kurzen Abständen von der Quelle entlang des Abflusskanals - Sequenzierung ausgewählter OTU-Bänder (OTU = operational taxonomic unit; in erster Näherung einer phylogenetischen Einheit entsprechend) aus der DGGE-Trennung zur Identifikation der Mikroorganismen (Uni Bozeman) à Korrelation mit der hydrogeochemischen Speziierung - Laborexperimente, in denen ausgewählte, aus den heißen Quellen isolierte Mikroorganismen Thioarsenat-Standard-Lösungen ausgesetzt werden zur Bestimmung der Umsatzraten einzelner Spezies (in meinem Labor) - Isotopenanalyse an Thioarsenaten mittels Elektrospray-Time-of-Flight-Massenspektrometrie (Trent University, Kanada) zur Bestimmung der 32S/34S Verhältnisse, die Hinweis auf abiotische oder biotische Fraktionierung geben und im Vergleich mit den mikrobiellen Untersuchungen helfen, abiotische von mikrobiell gesteuerten Umwandlungen zu unterscheiden - Bestimmung volatiler Arsenspezies mittels Sorption auf solid phase micro extraction fibers im Gelände und anschließender Analyse mittels Gaschromatographie-Massenspektrometrie zur Überprüfung der Arsenbilanz und möglicher Verschiebung der Redoxgleichgewichte durch Überführung von Spezies in die gasförmige Phase (Erfahrung zu Probenahme und Analyse bestehen aus meinem eigenen Promotionsprojekt); wenn möglich auch Korrelation mit dem Auftreten bestimmter Mikroorganismen

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