Explanipedia

Formation of natural IrO2 through Os–Ir–Ru alloy oxidation Open

Anton V. Kutyrev, Olga Filimonova, Anna Vymazalová, Katy Evans, Vadim S. Kamenetsky , et al. · 2025

The variety and origin of materials accreted by Bennu’s parent asteroid Open

Jessica Barnes, A. N. Nguyen, F. A. J. Abernethy, Ken‐ichi Bajo, David V. Bekaert , et al. · 2025

Mineralogical evidence for hydrothermal alteration of Bennu samples Open

T. J. Zega, T. J. McCoy, S. S. Russell, L. P. Keller, Z. Gainsforth , et al. · 2025

Bio-mediated CN cycling in serpentinites and the origin of life Open

Stefano Tenuta, Katy Evans, Steven M. Reddy, Benjamin M. Tutolo, William D.A. Rickard , et al. · 2025

Hydrogen-rich, high pH conditions associated with serpentinisation are fundamental to some theories of the origin of life on Earth and other planets. In these theories, the first life formed in hydrothermal vents from organic compounds pro…

The Role of Laser Pulse Energy on Data Quality and Reconstruction of Olivine Atom Probe Tomography Data Open

Dimitrios Dimitriou, Steven M. Reddy, David W. Saxey, Denis Fougerouse, Katy Evans , et al. · 2025

The study of the structure and geochemistry of olivine crystal defects is important but difficult because of their nanometer size and the analytical limitations of most techniques. Laser-assisted atom probe tomography (APT) is capable of s…

A one-billion-year-old Scottish meteorite impact Open

Christopher L. Kirkland, Timmons M. Erickson, Tim Johnson, Anthony R. Prave, R.A. Strachan , et al. · 2025

The Stoer Group in northwest Scotland is one of the oldest well-preserved sedimentary successions in Europe and includes the Stac Fada Member, an impact ejecta deposit. Here we report U-Pb analyses on shocked zircon grains that yield an ag…

Dislocation networks facilitate element diffusion in deformed garnet Open

Bruno Vieira Ribeiro, Christopher L. Kirkland, Melanie Finch, Chris Yakymchuk, Steven M. Reddy , et al. · 2025

Mechanisms of shear zone development in Krossøy, the Bergen Arcs, Norway Open

Lorena H. Filiberto, Håkon Austrheim, Andrew Putnis, José Alberto Padrón‐Navarta, Steven M. Reddy , et al. · 2025

An evaporite sequence from ancient brine recorded in Bennu samples Open

T. J. McCoy, S. S. Russell, T. J. Zega, K. L. Thomas-Keprta, S. A. Singerling , et al. · 2025

Geometry controlled segregation of minor and trace elements in olivine low-angle grain boundaries Open

Dimitrios Dimitriou, Steven M. Reddy, Katharina Marquardt, Katy Evans, Denis Fougerouse , et al. · 2025

Effects of Laser Pulse Energy on quality and reconstruction of Olivine Atom Probe Tomography data Open

Dimitrios Dimitriou, Steven M. Reddy, David W. Saxey, Denis Fougerouse, Katy Evans , et al. · 2025

Nanoparticles in natural beryllium-bearing sapphire: incorporation and exsolution of high field strength elements in corundum Open

Shiyun Jin, David W. Saxey, Zakaria Quadir, Steven M. Reddy, William D.A. Rickard , et al. · 2024

Nanoscale Os isotopic quantification of Wadi Tayin dunite platinum group minerals by atom probe tomography Open

Stefano Tenuta, Katy Evans, Steven M. Reddy, David W. Saxey, Tommaso Tacchetto , et al. · 2024

From ID-TIMS U-Pb dating of single monazite grain to APT-nanogeochronology: application to the UHT granulites of Andriamena (North-Central Madagascar) Open

Marion Turuani, Anne‐Magali Seydoux‐Guillaume, Antonin Laurent, Denis Fougerouse, Simon L. Harley , et al. · 2024

Monazite and zircon grains from the ultra-high temperature (UHT) granulite of the Andriamena unit in the centre north of Madagascar, previously investigated using micro-drilled single grain isotopic dissolution geochronology and in-situ el…

Dislocation-mediated interfacial re-equilibration of pyrite: An alternative model to interface-coupled dissolution-reprecipitation and gold remobilisation Open

Denis Fougerouse, Steven M. Reddy, Sumail, Joël Brugger, Nicolas Thébaud , et al. · 2024

Minerals and/or their compositions (substituted minor elements) can become metastable in changing conditions or if formed outside of equilibrium. Unstable minerals undergo chemical and/or structural modifications at rates determined by re-…

Towards a new impact geochronometer: Deformation microstructures and U-Pb systematics of shocked xenotime Open

Cilva Joseph, Denis Fougerouse, Aaron J. Cavosie, Hugo K.H. Olierook, Steven M. Reddy , et al. · 2024

Shock-deformation microstructures in xenotime have been proposed to record diagnostic evidence for meteorite impacts. Evaluating the potential for impact-induced U-Pb age resetting of the various microstructures that form in shocked xenoti…

Atomic-scale Element and Isotopic Investigation of <sup>25</sup>Mg-rich Stardust from an H-burning Supernova Open

N. D. Nevill, P. A. Bland, David W. Saxey, William D.A. Rickard, Paul Guagliardo , et al. · 2024

We have discovered a presolar olivine from ALH 77307 with the highest 25 Mg isotopic composition measured in a silicate to date ( δ 25 Mg = 3025.1‰ ± 38.3‰). Its isotopic compositions challenge current stellar models, with modeling of magn…

Mechanisms of Shear Zone Development in Krossøy, the Bergen Arcs, Norway Open

Lorena H. Filiberto, Håkon Austrheim, Andrew Putnis, José Alberto Padrón‐Navarta, Steven M. Reddy , et al. · 2024

Clustering and interfacial segregation of radiogenic Pb in a mineral host-inclusion system: Tracing two-stage Pb and trace element mobility in monazite inclusions in rutile Open

Rick Verberne, Steven M. Reddy, Denis Fougerouse, Anne‐Magali Seydoux‐Guillaume, David W. Saxey , et al. · 2023

Accessory minerals like zircon, rutile and monazite are routinely studied to inform about the timing and nature of geological processes. These studies are underpinned by our understanding of the transfer processes of trace elements and the…

Mineralogy and petrology of fine‐grained samples recovered from the asteroid (162173) Ryugu Open

T. Noguchi, Toru Matsumoto, Akira Miyake, Yohei Igami, Mitsutaka Haruta , et al. · 2023

Samples returned from the carbonaceous asteroid (162173) Ryugu by the Hayabusa2 mission revealed that Ryugu is composed of materials consistent with CI chondrites and some types of space weathering. We report detailed mineralogy of the fin…

Microstructures, geochemistry, and geochronology of mica fish: Review and advances Open

Bruno Vieira Ribeiro, Christopher L. Kirkland, Melanie Finch, Frederico Meira Faleiros, Steven M. Reddy , et al. · 2023

Shear zones are one of the most conspicuous structures in orogenic and rifting settings, accommodating high strain, rock displacement and influencing magma emplacement and fluid flow. Since shear zones may be simultaneously or sequentially…

Wide Field of View Versus High Spatial Resolution and High Sensitivity – the Advantage of Correlative Microscopies (APT, SIMS, EBSD, μXRF) for the Analysis of Minerals Open

Robert M. Ulfig, Steven M. Reddy, David W. Saxey, William D.A. Rickard, Denis Fougerouse , et al. · 2023

Journal Article Wide Field of View Versus High Spatial Resolution and High Sensitivity – the Advantage of Correlative Microscopies (APT, SIMS, EBSD, μXRF) for the Analysis of Minerals Get access Robert Ulfig, Robert Ulfig CAMECA Instrument…

Application of FIB-ToF-SIMS to the Search for and Characterisation of Enriched Uranium Particles Open

William D.A. Rickard, Xiao Sun, Matvei Aleshin, Laure Martin, Masturina Kracica , et al. · 2023

Journal Article Application of FIB-ToF-SIMS to the Search for and Characterisation of Enriched Uranium Particles Get access William D A Rickard, William D A Rickard John de Laeter Centre, Curtin University, Perth, Australia Corresponding a…

Crystallographic Texture and Substructural Phenomena in 316 Stainless Steel Printed by Selective Laser Melting Open

Ricardo Santamaria, Mobin Salasi, William D.A. Rickard, Thunyaluk Pojtanabuntoeng, Garry Leadbeater , et al. · 2023

There is a fast-growing interest in the use of selective laser melting (SLM) for metal/alloy additive manufacturing. Our current knowledge of SLM-printed 316 stainless steel (SS316) is limited and sometimes appears sporadic, presumably due…

Crystallographic Texture and Substructural Phenomena in 316 Stainless Steel Printed by Selective Laser Melting Open

Ricardo Santamaria, Mobin Salasi, William D.A. Rickard, Thunyaluk Pojtanabuntoeng, Garry Leadbeater , et al. · 2023

There is a fast-growing interest in the use of selective laser melting (SLM) for metal/alloy additive manufacturing. Our current knowledge of SLM printed 316 stainless steel (SS316) is limited and sometimes appears sporadic, presumably due…

Nanoscale features revealed by a multiscale characterization of discordant monazite highlight mobility mechanisms of Th and Pb Open

Marion Turuani, Anne‐Magali Seydoux‐Guillaume, Antonin Laurent, Steven M. Reddy, Simon Harley , et al. · 2023

The origin of platinum group minerals in oceanic crust Open

Katy Evans, Steven M. Reddy, Renaud Merle, Denis Fougerouse, William D.A. Rickard , et al. · 2023

Highly siderophile elements (HSEs), including Re and Os, are used extensively as geochemical tracers and geochronometers to investigate the formation and evolution of Earth’s crust and mantle. Mantle rocks are commonly serpentinized, but t…

Radiogenic Pb in xenotime trapped in nanoscale inclusions of apatite during fluid alteration Open

Cilva Joseph, Denis Fougerouse, Steven M. Reddy, Hugo K.H. Olierook, Tommaso Tacchetto , et al. · 2023

This study focuses on the low-temperature mineralogical response of xenotime, a phosphate mineral routinely used as a geochronometer, to fluid-assisted alteration. The studied xenotime grain (z6413) comes from a ∼ 1000 Ma pegmatite from th…

Causes, effects, and implications of the relationships amongst fluids, serpentinisation, and alloys Open

Katy Evans, Carol D. Frost, Steven M. Reddy, T.C. Brown · 2023

Temporal constraints on Fe mobility in Jack Hills zircon Open

Steven M. Reddy, Richard Taylor, Richard Harrison, David W. Saxey, William D.A. Rickard , et al. · 2023

Ancient detrital zircon grains containing magnetite inclusions have the potential to record the Earth’s magnetic field as far back as the Hadean. However, this requires magnetite to be either a primary inclusion or to be a secondary …

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