J. C. Bridges
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View article: Sulfur‐bearing serpentine in carbonaceous chondrites
Sulfur‐bearing serpentine in carbonaceous chondrites Open
A correlative multi‐technique approach, including electron microscopy and X‐ray synchrotron work, has been used to obtain both structural and compositional information of a sulfur‐bearing serpentine identified in several carbonaceous chond…
View article: Experimental measurements of the elemental sensitivity of MIXS detectors in support of the BepiColombo mission
Experimental measurements of the elemental sensitivity of MIXS detectors in support of the BepiColombo mission Open
IntroductionThe BepiColombo mission to Mercury [1] will arrive in late 2026 and carries the Mercury Imaging X-ray Spectrometer (MIXS) [2]. MIXS will recover elemental abundances from the upper tens of microns of Mercury’s surface through X…
View article: Synchrotron X-Ray Diffraction of Restricted Earth Return Samples in Containment
Synchrotron X-Ray Diffraction of Restricted Earth Return Samples in Containment Open
IntroductionA challenge in sample return missions to restricted bodies such as Mars, Europa, and Enceladus is enabling mineralogical and geochemical analyses whilst maintaining cleanliness and containment. Notably, due to the potential for…
View article: DigiGREF: a digital analogue of the Mercury Imaging X-ray Spectrometer Ground-Reference Facility
DigiGREF: a digital analogue of the Mercury Imaging X-ray Spectrometer Ground-Reference Facility Open
This paper presents a new X-ray fluorescence simulation (DigiGREF), designed as a digital analogue to the Mercury Imaging X-ray Spectrometer (MIXS) and Ground-reference Facility (GREF). MIXS is a novel instrument, onboard the BepiColombo s…
View article: Microscopic slickenside as a record of weak shock metamorphism in the surface layer of asteroid Ryugu
Microscopic slickenside as a record of weak shock metamorphism in the surface layer of asteroid Ryugu Open
The surface morphology of regolith grains from the C‐type asteroid Ryugu was studied in search of evidence of impact events on the asteroid. Scanning electron microscopy revealed that ~8% of C0105‐042 Ryugu grains have a smooth surface on …
View article: Synchrotron X-ray diffraction for sealed Mars Sample Return sample tubes
Synchrotron X-ray diffraction for sealed Mars Sample Return sample tubes Open
Introduction: NASA and ESA are collaborating on a Mars Sample Return (MSR) mission which aims to retrieve drill cores of Martian rock for terrestrial analysis, from Jezero Crater and the Perseverance Rover. Up to 30 samples, inside sealed …
View article: Incipient space weathering on asteroid 162173 Ryugu recorded by pyrrhotite
Incipient space weathering on asteroid 162173 Ryugu recorded by pyrrhotite Open
Regolith samples returned from asteroid 162173 Ryugu by the Hayabusa2 mission provide direct means to study how space weathering operates on the surfaces of hydrous asteroids. The mechanisms of space weathering, its effects on mineral surf…
View article: The high-resolution map of Oxia Planum, Mars; the landing site of the ExoMars Rosalind Franklin rover mission
The high-resolution map of Oxia Planum, Mars; the landing site of the ExoMars Rosalind Franklin rover mission Open
This 1:30,000 scale geological map describes Oxia Planum, Mars, the landing site for the ExoMars Rosalind Franklin rover mission. The map represents our current understanding of bedrock units and their relationships prior to Rosalind Frank…
View article: Electron microscopy observations of the diversity of Ryugu organic matter and its relationship to minerals at the micro‐ to nano‐scale
Electron microscopy observations of the diversity of Ryugu organic matter and its relationship to minerals at the micro‐ to nano‐scale Open
Transmission electron microscopy analyses of Hayabusa2 samples show that Ryugu organic matter exhibits a range of morphologies, elemental compositions, and carbon functional chemistries consistent with those of carbonaceous chondrites that…
View article: In situ investigation of an organic micro‐globule and its mineralogical context within a Ryugu “sand” grain
In situ investigation of an organic micro‐globule and its mineralogical context within a Ryugu “sand” grain Open
The Hayabusa2 mission from the Japan Aerospace Exploration Agency (JAXA) returned to the Earth samples of carbonaceous asteroid (162173) Ryugu. This mission offers a unique opportunity to investigate in the laboratory samples from a C‐type…
View article: Four‐dimensional‐STEM analysis of the phyllosilicate‐rich matrix of Ryugu samples
Four‐dimensional‐STEM analysis of the phyllosilicate‐rich matrix of Ryugu samples Open
Ryugu asteroid grains brought back to the Earth by the Hayabusa2 space mission are pristine samples containing hydrated minerals and organic compounds. Here, we investigate the mineralogy of their phyllosilicate‐rich matrix with four‐dimen…
View article: Synchrotron x‐ray diffraction for sealed Mars Sample Return sample tubes
Synchrotron x‐ray diffraction for sealed Mars Sample Return sample tubes Open
The joint NASA‐ESA Mars sample return campaign aims to return up to 31 sample tubes containing drilled sedimentary and igneous cores and regolith. The titanium alloy tubes will initially still be sealed when they are retrieved. Several typ…
View article: Mineralogy and petrology of fine‐grained samples recovered from the asteroid (162173) Ryugu
Mineralogy and petrology of fine‐grained samples recovered from the asteroid (162173) Ryugu Open
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…
View article: Phyllosilicates with embedded Fe‐based nanophases in Ryugu and Orgueil
Phyllosilicates with embedded Fe‐based nanophases in Ryugu and Orgueil Open
Samples were recently collected from the carbonaceous asteroid (162173) Ryugu, by the Japan Aerospace Exploration Agency (JAXA) Hayabusa2 mission. They resemble CI chondrites material, thus showing clear evidence of extensive aqueous alter…
View article: The high-resolution imaging science experiment (HiRISE) in the MRO extended science phases (2009–2023)
The high-resolution imaging science experiment (HiRISE) in the MRO extended science phases (2009–2023) Open
The Mars Reconnaissance Orbiter has been orbiting Mars since 2006 and has acquired >80,000 HiRISE images with sub-meter resolution, contributing to over 2000 peer-reviewed publications, and has provided the data needed to enable safe surfa…
View article: Manganese-Iron Phosphate Nodules at the Groken Site, Gale Crater, Mars
Manganese-Iron Phosphate Nodules at the Groken Site, Gale Crater, Mars Open
The MSL Curiosity rover investigated dark, Mn-P-enriched nodules in shallow lacustrine/fluvial sediments at the Groken site in Glen Torridon, Gale Crater, Mars. Applying all relevant information from the rover, the nodules are interpreted …
View article: Future UK solar system science
Future UK solar system science Open
A new Roadmap for Solar System Research in the UK has been published, and the Solar System Advisory Panel report on the processes involved in updating the previous iteration
View article: CHEMCAM: zapping Mars for 10 years (and more)
CHEMCAM: zapping Mars for 10 years (and more) Open
International audience
View article: Synchrotron X-ray Diffraction for Early Characterisation of Sealed Mars2020 Samples
Synchrotron X-ray Diffraction for Early Characterisation of Sealed Mars2020 Samples Open
NASA, ESA and the UK are collaborating on a Mars Sample Return (MSR) mission which aims to retrieve drill cores of Martian rock for terrestrial analysis, starting with the Mars2020 rover which landed successfully in Jezero Crater in Feb. 2…
View article: Mars Sample Return Rock Sampling: Post-landing Extraction of Solid-core Samples.
Mars Sample Return Rock Sampling: Post-landing Extraction of Solid-core Samples. Open
A NASA-ESA Rock Sampling working group has been set up to determine plans for opening the Mars2020 sample tubes once they are returned to Earth. This team works under the oversight of the Mars Campaign Science Group (MCSG). The rocks sampl…
View article: Correlated Multi-Technique Characterisation of Sulfur-Bearing Serpentine in Carbonaceous Chondrites
Correlated Multi-Technique Characterisation of Sulfur-Bearing Serpentine in Carbonaceous Chondrites Open
Phyllosilicate minerals in the carbonaceous chondrites provide insights into processes in primitive parent bodies of the early Solar System. It is widely agreed that the CM- and CI-type carbonaceous chondrites underwent aqueous alteration …
View article: A dehydrated space-weathered skin cloaking the hydrated interior of Ryugu
A dehydrated space-weathered skin cloaking the hydrated interior of Ryugu Open
Without a protective atmosphere, space-exposed surfaces of airless Solar System bodies gradually experience an alteration in composition, structure and optical properties through a collective process called space weathering. The return of …
View article: Aqueous Alteration of the Askival Feldspathic Cumulate Sample in Gale Crater
Aqueous Alteration of the Askival Feldspathic Cumulate Sample in Gale Crater Open
Askival is a light-toned, coarsely crystalline float rock, which was identified near the base of Vera Rubin Ridge in Gale crater. We have studied Askival, principally with the ChemCam instrument but also using APXS compositional data and M…
View article: Askival: An altered feldspathic cumulate sample in Gale crater
Askival: An altered feldspathic cumulate sample in Gale crater Open
Askival is a light‐toned, coarsely crystalline float rock, which was identified near the base of Vera Rubin Ridge in Gale crater. We have studied Askival, principally with the ChemCam instrument but also using APXS compositional data and M…
View article: The Winchcombe meteorite, a unique and pristine witness from the outer solar system
The Winchcombe meteorite, a unique and pristine witness from the outer solar system Open
Direct links between carbonaceous chondrites and their parent bodies in the solar system are rare. The Winchcombe meteorite is the most accurately recorded carbonaceous chondrite fall. Its pre-atmospheric orbit and cosmic-ray exposure age …
View article: Mars Science Laboratory CheMin Data From the Glen Torridon Region and the Significance of Lake‐Groundwater Interactions in Interpreting Mineralogy and Sedimentary History
Mars Science Laboratory CheMin Data From the Glen Torridon Region and the Significance of Lake‐Groundwater Interactions in Interpreting Mineralogy and Sedimentary History Open
The Glen Torridon (GT) region in Gale crater, Mars is a region with strong clay mineral signatures inferred from orbital spectroscopy. The CheMin X‐ray diffraction (XRD) instrument onboard the Mars Science Laboratory rover, Curiosity , mea…
View article: Overview of the Morphology and Chemistry of Diagenetic Features in the Clay‐Rich Glen Torridon Unit of Gale Crater, Mars
Overview of the Morphology and Chemistry of Diagenetic Features in the Clay‐Rich Glen Torridon Unit of Gale Crater, Mars Open
The clay‐rich Glen Torridon region of Gale crater, Mars, was explored between sols 2300 and 3007. Here, we analyzed the diagenetic features observed by Curiosity , including veins, cements, nodules, and nodular bedrock, using the ChemCam, …