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  • Journal article
    Bland PA, Collins GS, Davison TM, Abreu NM, Ciesla FJ, Muxworthy AR, Moore Jet al., 2014,

    Pressure-temperature evolution of primordial solar system solids during impact-induced compaction

    , Nature Communications, Vol: 5, Pages: 1-13, ISSN: 2041-1723

    Prior to becoming chondritic meteorites, primordial solids were a poorly consolidated mix of mm-scale igneous inclusions (chondrules) and high-porosity sub-μm dust (matrix). We used high-resolution numerical simulations to track the effect of impact-induced compaction on these materials. Here we show that impact velocities as low as 1.5 km s−1 were capable of heating the matrix to >1,000 K, with pressure–temperature varying by >10 GPa and >1,000 K over ~100 μm. Chondrules were unaffected, acting as heat-sinks: matrix temperature excursions were brief. As impact-induced compaction was a primary and ubiquitous process, our new understanding of its effects requires that key aspects of the chondrite record be re-evaluated: palaeomagnetism, petrography and variability in shock level across meteorite groups. Our data suggest a lithification mechanism for meteorites, and provide a ‘speed limit’ constraint on major compressive impacts that is inconsistent with recent models of solar system orbital architecture that require an early, rapid phase of main-belt collisional evolution.

  • Conference paper
    Døssing A, Muxworthy AR, Mac Niocaill C, Riishuus Met al., 2014,

    High-Latitude Geomagnetic Secular Variation and Paleointensity during 6-0.5 Ma: Paleomagnetic Results from Eastern Iceland

    , AGU Fall
  • Conference paper
    Abubakar R, Muxworthy AR, Fraser A, Sephton MA, Watson JS, Southern P, Paterson GA, Heslop Det al., 2014,

    Mapping Petroleum Migration Pathways Using Magnetics (poster)

    , AGU Fall
  • Conference paper
    Dodd S, Mac Niocaill C, Muxworthy AR, 2014,

    The Etendeka large igneous province, Namibia. A 4 Ma duration from detailed magnetostratigraphy (poster)

    , AGU Fall
  • Conference paper
    Almeida TP, Kasama T, Muxworthy AR, Williams W, Hansen TW, Dunin-Borkowski REet al., 2014,

    Visualisation of chemical remanent magnetisation in pseudo-single domain Fe3O4 particles examined by environmental TEM and off-axis electron holography

    , International Microscopy Congress
  • Conference paper
    Shah J, Muxworthy AR, Russell S, Genge Met al., 2014,

    Magnetic remanence of l/ll4 Bjurböle: timing, intensity, and implications (poster)

    , 77th Annual Meteoritical Society Meeting
  • Conference paper
    Muxworthy AR, Williams W, Almeida TP, 2014,

    Understanding the effect of chemical alteration on palaeomagnetic signals (invited)

    , The Castle Meeting
  • Journal article
    Muxworthy AR, Krasa D, Williams W, Almeida TPet al., 2014,

    Paleomagnetic recording fidelity of nonideal magnetic systems

    , GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, Vol: 15, Pages: 2254-2261, ISSN: 1525-2027
  • Conference paper
    Almeida TP, Muxworthy AR, Williiams W, Kasama T, Dunin-Borkowski Ret al., 2014,

    Hydrothermal synthesis, off-axis electron holography and magnetic properties of Fe3O4 nanoparticles

  • Conference paper
    Lam C, Muxworthy AR, Green D, 2014,

    Determining the magnetic signature of London’s air pollution (poster)

    , Magnetic Interactions
  • Conference paper
    Roberts O, Muxworthy AR, Mac Niocaill C, Døssing Aet al., 2014,

    High-latitude paleomagnetic and Ar-Ar study of 0-6 Ma lavas from eastern Iceland: Contribution to the time-averaged field initiative (poster)

    , Magnetic Interactions
  • Conference paper
    Emmerton S, Muxworthy AR, Sephton MA, 2014,

    Dating hydrocarbon seeps – the Mupe Bay Mystery (poster)

    , Magnetic Interactions
  • Conference paper
    Shah J, Muxworthy AR, Matzka J, Leonhardt L, Leitner Met al., 2014,

    Palaeomagnetic evidence for the persistence of the South-Atlantic geomagnetic anomaly

    , Magnetic Interactions
  • Conference paper
    Emmerton S, Muxworthy AR, 2014,

    Correlating biodegradation to magnetisation in oil bearing sedimentary rocks (poster)

    , Magnetic Interactions
  • Conference paper
    Almeida T, Kasama TP, Muxworthy AR, Williams W, Dunin-Borkowski REet al., 2014,

    Oxidation of pseudo-single domain Fe3O4 particles and associated magnetic response examined by complementary environmental TEM, off-axis electron holography, Mössbauer spectroscopy and SuperSTEM analysis

    , Magnetic Interactions

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