Teaching
- Baumaterial der Erde - Übungen
- Mikroskopie gesteinsbildender Minerale - Übungen
- Recherchemethoden und Präsentation wissenschaftlicher Daten
- Analytische Methoden I (SEM, TEM)
- Analytische Methoden II (SEM, TEM, SIMS)
- Angewandte Geowissenschaften
Research Areas
- Focused Ion Beam - Preparation (FIB)
- Transmission Electron Microscopy (TEM)
- High spatial resolution Mass Spectrometry (NanoSIMS, SIMS)
- Electron Backscatter Diffraction Analysis (EBSD)
- Combined FIB-TEM studies of terrestrial and extraterrestrial samples
- Astromineralogy, presolar Stardust
- Aberration-corrected UltraSTEM analyses on organic particles from meteorites and comets
- TEM analyses of matrix and fine-grained rims in carbonaceous chondrites
CV
Education
- Ph. D., Max-Planck-Institute for Chemistry, Mainz
- Geology Studies, Degree: Diploma, University of Cologne
Positions
- Research Associate, Institute for Mineralogy, University of Münster
- Post-Doc, Institute for Mineralogy, University of Münster
- Post-Doc, Max-Planck-Institute for Chemistry, Mainz
- GGL Diamond Corporation, Junior Geologist for Diamond Exploration, Northwest Terrirtories, Canada
Honors
- KlarText – Klaus Tschira Preis für verständliche Wissenschaft – Klaus Tschira Stiftung gGmbH
- Preis für die beste naturwissenschaftliche Doktorarbeit 2008 – Verein der Freunde und Förderer der Uni Frankfurt
External Functions
Projects
- Amorphe Silikate und organische Materie in kometaren interplanetaren Staubpartikeln - Hinweise auf frühe Prozesse im solaren Nebel ( – )
Individual Granted Project: DFG - Individual Grants Programme | Project Number: VO 1816/5-1 - SPP 1833: Building a Habitable Earth - Sub-project: Iron-60 as a heat source for melting and differentiation of Earth-forming planetesimals and planetary embryos ( – )
Subproject in DFG-Joint Project Hosted outside the University of Münster: DFG - Priority Programme | Project Number: VO 1816/4-1 - SPP 1833: Building a Habitable Earth - Subproject: High resolution electron microscopy (UltraSTEM) of the most primitive organic materials in chondrite parent bodies and comets - Formation and evolution of the organic inventory of early Earth ( – )
Subproject in DFG-Joint Project Hosted outside the University of Münster: DFG - Priority Programme | Project Number: VO 1816/3-1 - SPP 1385 Teilprojekt - Staub aus Supernova-Explosionen im solaren Nebel: Eine integrierte nano- und mikroanalytische Studie ( – )
Subproject in DFG-Joint Project Hosted outside the University of Münster: DFG - Priority Programme | Project Number: VO 1816/2-1 - SPP 1385 - WP: Activity of aqueous fluids in the early solar system - characterization and formation timescales of the earliest water-bearing phases in chondritic samples ( – )
Subproject in DFG-Joint Project Hosted outside the University of Münster: DFG - Priority Programme | Project Number: BI 344/12-1; VO 1816/1-1
- Amorphe Silikate und organische Materie in kometaren interplanetaren Staubpartikeln - Hinweise auf frühe Prozesse im solaren Nebel ( – )
Publications
- . (). Iron-60 in the early Solar System revisited: insights from in situ isotope analysis of chondritic troilite. Astrophysical Journal, 929(1), 107–126. doi: 10.3847/1538-4357/ac5910.
- . (). How do secondary iron enrichments form within basaltic eucrites? An experimental approach. Meteoritics & Planetary Science, 56(5), 911–928. doi: 10.1111/maps.13651.
- . (). Isotope Systematics of Presolar Silicate Grains: New Insights from Magnesium and Silicon. The Astrophysical Journal, 913(1), 10–27. doi: 10.3847/1538-4357/abf041.
- . (). Natural Fe-bearing aluminous bridgmanite in the Katol L6 chondrite. Proceedings of the National Academy of Sciences of the United States of America (PNAS), 118(40), e2108736118–. doi: 10.1073/pnas.2108736118.
- . (). Origins of olivine in Earth’s youngest kimberlite: Igwisi Hills volcanoes, Tanzania craton. Contributions to Mineralogy and Petrology, 176, 62.
Research Articles (Journals)
- . (). Ferric-ferrous iron ratios of experimental majoritic garnet and clinopyroxene as a function of oxygen fugacity. American Mineralogist, 105, 1866–1874. doi: 10.2138/am-2020-7265.
- . (). Amorphous Silicates as a Record of Solar Nebular and Parent Body Processes – A Transmission Electron Microscope Study of Fine-Grained Rims and Matrix in three Antarctic CR Chondrites. Meteoritics and Planetary Science, 55 (7), 1491–1508. doi: 10.1111/maps.13526.
- . (). The brecciated texture of polymict eucrites: Petrographic investigations of unequilibrated meteorites from the Antarctic Yamato collection . Meteoritics and Planetary Science, 55, 558–574. doi: 10.1111/maps.13453.
- . (). Mechanisms of fault mirror formation in carbonate rocks. Earth and Planetary Science Letters, 530, 115886–115900. doi: 10.1016/j.epsl.2019.115886.
- . (). The Presolar Grain Inventory of Fine-grained Chondrule Rims in the Mighei-type (CM) Chondrites. Meteoritics and Planetary Science, 55 (6), 1176–1206. doi: 10.1111/maps.13412.
- . (). Isotopic compositions, nitrogen functional chemistry, and low-loss electron spectroscopy of complex organic aggregates at the nanometer-scale in the carbonaceous chondrite Renazzo. Meteoritics and Planetary Science, 55 (6), 1293–1319. doi: 10.1111/maps.13389.
- . (). Investigating crystal orientation patterns of foraminiferal tests by Electron Backscatter Diffraction analysis. European Journal of Mineralogy, 32, 613–622. doi: 10.5194/ejm-32-613-2020.
- . (). A primordial 15N-depleted organic component detected within the carbonaceous chondrite Maribo. Scientific Reports, 10(1), 20251. doi: 10.1038/s41598-020-77190-z.
Research Articles in Edited Proceedings (Conferences)
- . (). Magnesium- and Silicon-Isotopic systematics of presolar silicate grains. In Lunar and Planetary Science Conference, Houston , p. #1024.
- . (). Investigation of nitrides in carbonaceous chondrites: a window to early solar nebula processes? In Lunar and Planetary Science Conference, Houston , p. #1937.
Research Articles (Journals)
- . (). Lead diffusion in CaTiO3: A combined study using Rutherford Backscattering and TOF-SIMS for depth profiling to reveal the role of lattice strain in diffusion processes. American Mineralogist, 104(4), 557–568.
Research Articles in Edited Proceedings (Conferences)
- . (). Iron-60 in primitive meteorites: New in situ data. In Paneth Kolloquium, Nördlingen , p. #0042.
- . (). Chemical and petrographical characterization of amorphous silicate material in GEMS. In Paneth Kolloquium, Nördlingen , p. #0027.
- . (). The occurrence of silicon nitride in chondritic meteorites. In Paneth Kolloquium, Nördlingen , p. #0023.
- . (). Functional chemistry and isotopic composition of organics within the pristine chondrite Maribo. In Paneth Kolloquium, Nördlingen , p. #0033.
- . (). Challenges and applications of high spatial and energy eesolution EELS for mapping functional chemistry in beam-sensitive materials at low acceleration voltages. In Microscopy and Microanalysis, Portland, USA , p. Vol. 25 (Suppl 2). doi: 10.1017/S1431927619003131.
- . (). In situ isotopic study of nitrogen carriers in unequilibrated ordinary chondrites. In 82nd Annual Meeting of the Meteoritical Society, Sapporo, Japan , p. Abstr. #6360.
- . (). A fresh in situ search for signs of 60Fe in primitive chondrites. In 82nd Annual Meeting of the Meteoritical Society, Sapporo, Japan , p. Abstr. #6373.
- . (). Pb transport in CaTiO3 controlled by diffusion and recrystallization governed by lattice strain. In Goldschmidt Conference, Barcelona.
- . (). Probing the early solar nebula with meteoritic silicon nitride. In Lunar and Planetary Science Conference, Houston , p. #2961.
Research Articles (Journals)
- . (). An isotopic, elemental and structural study of silicon nitride from enstatite chondrites. Geochimica et Cosmochimica Acta, 235, 153–172. doi: 10.1016/j.gca.2018.05.025.
- . (). Deformation mechanisms and evolution of the microstructure of gouge in the Main Fault in Opalinus Clay in the Mont Terri rock laboratory (CH). Solid Earth, 9, 1–24.
- . (). Structural Investigation of Silicon Carbide X Grains: Constraints on Condensation in Supernova Ejecta. The Astrophysical Journal, 868, 34–62.
Research Articles in Edited Proceedings (Conferences)
- . (). A Study of Osbornite from Enstatite Chondrites at the submicrometer scale. In Lunar and Planetary Science Conference, Houston, USA , p. #1851.
- . (). The Formation of Large SiC Grains in Clumpy Supernova Ejecta. In 81st Annual Meeting of the Meteoritical Society, Moscow, Russia , p. Abstr. #6222.
- . (). Iron Oxidation State of Amorphous Silicates and Low-Loss Electron Energy Spectroscopy of Organic Matter in the Pristine CM Chondrite Maribo. In 81st Annual Meeting of the Meteoritical Society, Moscow, Russia , p. Abstr. #6109.
- . (). Nature of five polymict eucrites from the Antarctic Yamato dense collecting area. In Hayabusa 2018 : 6th Symposium of Solar System Materials, Tokyo.
Research Articles (Journals)
- . (). Al2O3, SiO2 and TiO2 as Coatings for Safer LiNi0.8Co0.15Al0.05O2 Cathodes: Electrochemical Performance and Thermal Analysis by Accelerating Rate Calorimetry. Journal of The Electrochemical Society, 164(9), A2190–A2198. doi: 10.1149/2.0071712jes.
- (). Chemical composition and iron oxidation state of amorphous matrix silicates in the carbonaceous chondrite Acfer 04. Meteoritics and Planetary Science, 2017(1-14). doi: 10.1111/maps.12991.
Research Articles in Edited Proceedings (Conferences)
- . (). An experimental study on alteration in Eucrites and the petrology of Vesta´s crust. In Paneth Kolloquium, Nördlingen.
- . (). A SEM and NanoSIMS investigation of organic aggregates in Renazzo-type (CR) chondrites. In Paneth Kolloquium, Nördlingen.
- . (). Minor Element Zoning in presolar SiC of Supernova Origin. In Paneth Kolloquium, Nördlingen.
- . (). Exploring Chondrule and CAI Rims Using Micro- and Nano-Scale Petrological and Compositional Analysis. In American Geophysical Union Fall Meeting, New Orleans, USA.
- . (). Nitrogen Functional Chemistry of Organic Grains in CR Chondrites and IDPs. In Annual Meeting of the Meteoritical Society, Santa Fe, USA , p. A6206.
- . (). A SEM and NanoSIMS Investigation of Organic Aggregates in the CR Chondrites Miller Range 07525 and Renazzo. In Annual Meeting of the Meteoritical Society, Santa Fe, USA , p. A6154.
- . (). The Silicon Nitride Inventory of Enstatite Chondrites. In Lunar and Planetary Science Conference, Houston , p. #1391.
Research Articles (Journals)
- (). Ancient stardust in fine-grained chondrule dust rims from carbonaceous chondrites. Earth and Planetary Science Letters, 434(null), 117–128. doi: 10.1016/j.epsl.2015.11.028.
- . (). Formation of Mg-rich Olivine Pseudomorphs in Serpentinized Dunite from the Mesoarchean Nuasahi Massif, Eastern India: Insights into the Evolution of Fluid Composition at the Mineral–Fluid Interface. Journal of Petrology, 57(1), 3–26.
Research Articles in Edited Proceedings (Conferences)
- . (). NanoSIMS and TEM Investigations of Supernova SiC Grains. In Lunar and Planetary Science Conference, Houston , p. #1478.
- . (). TEM Investigations of Amorphous Silicates in Fine-Grained Rims from Antarctic CR2 Chondrites. In Lunar and Planetary Science Conference, Houston , p. #1933.
- . (). Lessons learned from electron microscopy of deformed Opalinus Clay. In International Workshop on Advances in Laboratory Testing and Modelling of Soils and Shales, Villars-sur-Ollon, Switzerland.
- . (). Nanoscale Alteration of amorphous Fe-silicate in meteorites. In Goldschmidt Conference, Yokohama, Japan.
Research Articles (Journals)
- . (). Experimental determination of trace element partition coefficients between spinel and silicate melt: The influence of chemical composition and oxygen fugacity. Contributions to Mineralogy and Petrology, 69(4), 45–77. doi: 10.1007/s00410-015-1128-5.
- . (). New experimental approach to study aqueous alteration of amorphous silicates at low reaction rates. Chemical Geology, 412, 179–192.
Research Articles in Edited Proceedings (Conferences)
- . (). The Presolar Grain Inventory of CM Chondrites. In Meteoritical Society Meeting, Berkeley, USA , p. A5178.
- . (). Textural investigations of possible fluid-mineral interactions in eucrites. In Goldschmidt Conference, Prague, CZ , p. A4462.
- (). CM chondrite aqueous alteration – chemical and oxygen isotope constraints from calcite. . In (Ed.) Paneth-Kolloquium, Nördlingen , p. #0025.
- . (). Isotopic and Structural Investigation of Presolar SiC Grains of Supernova Origin. In Lunar and Planetary Science Conference, Houston , p. 1733.
Research Articles (Journals)
- . (). Fluid-induced organic synthesis in the solar nebula recorded in extraterrestrial dust from meteorites. Proceedings of the National Academy of Sciences of the United States of America (PNAS), 10.1073/pnas.1408206111. doi: 10.1073/pnas.1408206111.
- . (). Trachyandesitic volcanism in the early Solar System. Proceedings of the National Academy of Sciences of the United States of America (PNAS), 111(35), 12689–92. doi: 10.1073/pnas.1404799111.
- . (). Microstructural evolution of an incipient fault zone in Opalinus Clay: Insights from an optical and electron microscopic study of ion-beam polished samples from the Main Fault in the Mt-Terri underground research laboratory. Journal of Structural Geology, doi: 10.1016/j.jsg.2014.07.014..
Research Articles in Edited Proceedings (Conferences)
- . (). Micro investigations of possible fluid-mineral interactions recorded in eucritic meteorites. In 92. Jahrestagung der Deutschen Mineralogischen Gesellschaft, Jena.
- . (). Modelling changes of the Paleogene Ca budget using benthic foraminifera. In American Geophysical Union Fall Meeting, San Francisco, USA.
- (). Oxygen isotope systematics of calcites from CM chondrites: Constraints on aqueous alteration. In DFG-Meeting Heidelberg, Heidelberg.
- . (). Disturbed Lu-Hf isotope systematics of achondrites: Testing a new hypothesis. In 92. Jahrestagung der Deutschen Mineralogischen Gesellschaft, Jena, Deutschland.
- . (). Oxygen isotope systematics of CM chondrite calcite: Constraints on aqueous alteration. In 92. Jahrestagung der Deutschen Mineralogischen Gesellschaft, Jena.
- (). Clues to the formation of nanoscale alteration textures in the CM chondrites Murchison and Maribo . In 92. Jahrestagung der Deutschen Mineralogischen Gesellschaft, Jena.
- (). The early stages of aqueous alteration in CM chondrites - TEM-UltraSTEM-STXM investigations of the less-altered chondrite Maribo. In Lunar Planet. Sci. XLV, Houston , p. #1543.
- (). Tracking aqueous alteration of CM chondrites - insights from in situ oxygen isotope measurements of calcite. In (Eds.) Lunar Planet. Sci. XLV, Houston , p. #1761.
- . (). The valency of iron in the silicates of CR chondrite matrices: observations and experiments. In Lunar and Planetary Science Conference , p. 2052.
Research Articles (Journals)
- (). Transmission electron microscopy of al-rich silicate stardust from asymptotic giant branch stars. Astrophysical Journal, 769(1). doi: 10.1088/0004-637X/769/1/61.
Research Articles in Edited Proceedings (Conferences)
- (). Tracing aqueous alteration in CM chondrites: Inplications from in-situ oxygen isotope measurements of calcite. . In Meteoritical Society Meeting, Edmonton , p. A170.
- (). TEM observations of aqueously altered phases in Maribo (CM2) and Murchison (CM2). . In (Ed.) Meteoritical Society Meeting, Edmonton , p. A51.
- (). Chelyabinsk – not only another ordinary LL5 chondrite, but a spectacular chondrite breccia. . In (Ed.) Meteortical Society Meeting, Edmonton , p. A61.
- . (). Alteration of amorphous Fe-silicate in meteorites. In Goldschmidt Conference, Florence, Italy.
- . (). Search for presolar grains in fine-grained chondrule rims: first results from CM chondrites and Acfer 094. In Lunar and Planetary Science Conference, Houston , p. 2273.
- . (). Serpentinization of Amorphous Silicate in the Early Solar System: A Nanoscale Experimental Study. In Lunar and Planetary Science Conference, Houston , p. 1969.
- . (). Characterization of Presolar Material in Fine-Grained Chondrule Rims and Matrix of CR Chondrites. In Meteoritical Society Meeting, Edmonton, Canada , p. A217.
- . (). Microstructural evolution and element mobility during fluid-mediated gabbro-to-eclogite transformation. In EGU General Assembly Conference, Vienna , p. 7711.
Research Articles (Journals)
- . (). The legacy of crystal-plastic deformation in olivine: High-diffusivity pathways during serpentinization. Contributions to Mineralogy and Petrology, 163(4), 701–724. doi: 10.1007/s00410-011-0695-3.
- . (). Characterization of presolar material in the Cr chondrite Northwest Africa 852. Astrophysical Journal, 745(1).
- (). Erratum: Characterization of presolar material in the CR chondrite Northwest Africa 852 (The Astrophysical Journal (2012) 745 (38)). Astrophysical Journal, 753(2). doi: 10.1088/0004-637X/753/2/179.
Research Articles in Edited Proceedings (Conferences)
- . (). TIMING OF HYDRATION ON THE CM PARENT BODY INFERRED FROM COMBINED IN-SITU STUDIES ON THE MARIBO AND MURCHISON CHONDRITES. In Meteoritical Society Meeting, Cairns , p. A393.
- . (). Partitioning of F between Nominally Fluorine-Free Minerals and Basaltic Melts: Implications for the Global Cycle of Halogens. In Goldschmidt Conference, Prag , p. 1945.
- . (). Aberration-corrected SuperSTEM analysis of isotopically anomalous carbonaceous hotspots in primitive extraterrestrial samples. In European Microscopy Congress, Manchester , p. 629.
- . (). Abundant Primitve Phases in Fine-Grained Chondrule Rims of CR and Related Chondrites. In Meteoritical Society Meeting, Cairns, Australia , p. 5191.
- . (). GENTLE ABERRATION-CORRECTED STEM ANALYSIS OF N-15-AND D-HOTSPOTS IN CHONDRITIC SAMPLES. In METEORITICS & PLANETARY SCIENCE , pp. A394–A394.
- . (). The Association of 15N-anomalous Matter with Stardust in Chondrites Acfer 094 and NWA 852. In Lunar and Planetary Science Conference , p. 1720.
Research Articles (Journals)
- . (). The inventory of presolar grains in primitive meteorites: a NanoSIMS study of C-, N-, and O-isotopes in NWA 852. Proc. Symp. Nuclei Cosmos XI, 144.
Research Articles in Edited Proceedings (Conferences)
- . (). First Fe Isotopic Measurement of a Highly 17O-enriched Stardust Silicate. In Lunar and Planetary Science Conference, Houston , p. 1200.
Research Articles (Journals)
- . (). Heavy Element Abundances in Presolar Silicon Carbide Grains from Low-Metallicity AGB Stars. Publications of the Astronomical Society of Australia, 26(3), 284–288. doi: 10.1071/AS08033.
- . (). NanoSIMS analysis and Auger electron spectroscopy of silicate and oxide stardust from the carbonaceous chondrite Acfer 094. Geochimica et Cosmochimica Acta, 73(23), 7127–7149. doi: 10.1016/j.gca.2009.08.015.
- . (). TEM foil preparation of sub-micrometre sized individual grains by focused ion beam technique. Journal of Microscopy, 235(1), 59–66. doi: 10.1111/j.1365-2818.2009.03181.x.
- . (). DIRECT LABORATORY ANALYSIS OF SILICATE STARDUST FROM RED GIANT STARS. Astrophysical Journal, 700(1), 774–782. doi: 10.1088/0004-637X/700/1/774.
Research Articles in Edited Proceedings (Conferences)
- . (). NanoSIMS search for interstellar silicate dust in chondritic samples. In Goldschmidt Conference, Davos, Switzerland , p. A1392.
Research Articles (Journals)
- . (). Si isotopic compositions of presolar silicate grains from red giant stars and supernovae. Astrophysical Journal, 684(1), 611–617. doi: 10.1086/589913.
- . (). Presolar silicates in meteorites and interplanetary dust particles. IXth Torino Workshop on Evolution and Nucleosynthesis in AGB Stars and the IInd Perugia Workshop on Nuclear Astrophysics. AIP Conference Proceedings, 1001, 254–261.
Research Articles in Edited Proceedings (Conferences)
- . (). Atypical magnesium abundances in oxygen-rich stardust: Nanosims and Auger analyses. In Meteoritical Society Meeting, Matsue, Japan , p. A164.
- . (). Silicon Isotope Measurements of Presolar Silicates. In Lunar and Planetary Science Conference , p. 1093.
- . (). NanoSIMS Studies of Small Presolar SiC Grains: C-and Si-Isotopic Compositions and Trace Element Abundances. In Lunar and Planetary Science Conference , p. 1025.
Research Articles (Journals)
- . (). Stellar MgSiO3 perovskite: A shock-transformed stardust silicate found in a meteorite. Astrophysical Journal, 666(1), L49L52.
- . (). Carbonates from the lower part of transition zone or even the lower mantle. Earth and Planetary Science Letters, 260(1-2), 1–9. doi: 10.1016/j.epsl.2007.02.038.
- . (). Inclusions of nanocrystalline hydrous aluminium silicate "Phase Egg" in superdeep diamonds from Juina (Mato Grosso State, Brazil). Earth and Planetary Science Letters, 259(3-4), 384–399. doi: 10.1016/j.epsl.2007.04.041.
Research Articles in Edited Proceedings (Conferences)
- . (). Auger analysis of presolar silicates in acifer 094 and the discovery of a presolar CAI. In Meteoritical Society Meeting, Tucson, USA , p. A158.
- . (). Search for S-bearing presolar grains in the Acfer 094 meteorite. In Meteoritical Society Meeting, Tucson, USA , p. A69.
- . (). A Presolar Silicate Trilogy: Condensation, Coagulation and Transformation-New Insights from NanoSIMS/TEM Investigations. In Lunar and Planetary Science Conference, Houston , p. 1262.
Research Articles in Edited Proceedings (Conferences)
- . (). Characterization of Presolar Silicate Grains by Combined NanoSIMS/TEM Studies. In Meteoritical Society Meeting, Zürich , p. 5194.
- . (). A Complex Presolar Grain in Acfer 094-Fingerprints of a Circumstellar Condensation Sequence? In Lunar and Planetary Science Conference, Houston.
Other Scientific Publications
- . (). CO2-recycling to the deep convecting mantle.
- . (). Detection of a Ca-rich lithology in the Earth's deep (> 300 km) convecting mantle. Earth and Planetary Science Letters, 236(3-4), 579–587. doi: 10.1016/j.epsl.2005.05.021.