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Journal articleBland PA, Collins GS, Davison TM, et al., 2014,
Pressure-temperature evolution of primordial solar system solids during impact-induced compaction
, Nature Communications, Vol: 5, Pages: 1-13, ISSN: 2041-1723Prior 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.
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Conference paperDøssing A, Muxworthy AR, Mac Niocaill C, et al., 2014,
High-Latitude Geomagnetic Secular Variation and Paleointensity during 6-0.5 Ma: Paleomagnetic Results from Eastern Iceland
, AGU Fall -
Conference paperAbubakar R, Muxworthy AR, Fraser A, et al., 2014,
Mapping Petroleum Migration Pathways Using Magnetics (poster)
, AGU Fall -
Conference paperDodd S, Mac Niocaill C, Muxworthy AR, 2014,
The Etendeka large igneous province, Namibia. A 4 Ma duration from detailed magnetostratigraphy (poster)
, AGU Fall -
Conference paperAlmeida TP, Kasama T, Muxworthy AR, et 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 paperShah J, Muxworthy AR, Russell S, et al., 2014,
Magnetic remanence of l/ll4 Bjurböle: timing, intensity, and implications (poster)
, 77th Annual Meteoritical Society Meeting -
Conference paperMuxworthy AR, Williams W, Almeida TP, 2014,
Understanding the effect of chemical alteration on palaeomagnetic signals (invited)
, The Castle Meeting -
Journal articleMuxworthy AR, Krasa D, Williams W, et al., 2014,
Paleomagnetic recording fidelity of nonideal magnetic systems
, GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, Vol: 15, Pages: 2254-2261, ISSN: 1525-2027- Author Web Link
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- Citations: 6
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Conference paperAlmeida TP, Muxworthy AR, Williiams W, et al., 2014,
Hydrothermal synthesis, off-axis electron holography and magnetic properties of Fe3O4 nanoparticles
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Conference paperLam C, Muxworthy AR, Green D, 2014,
Determining the magnetic signature of London’s air pollution (poster)
, Magnetic Interactions -
Conference paperRoberts O, Muxworthy AR, Mac Niocaill C, et 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 paperEmmerton S, Muxworthy AR, Sephton MA, 2014,
Dating hydrocarbon seeps – the Mupe Bay Mystery (poster)
, Magnetic Interactions -
Conference paperShah J, Muxworthy AR, Matzka J, et al., 2014,
Palaeomagnetic evidence for the persistence of the South-Atlantic geomagnetic anomaly
, Magnetic Interactions -
Conference paperEmmerton S, Muxworthy AR, 2014,
Correlating biodegradation to magnetisation in oil bearing sedimentary rocks (poster)
, Magnetic Interactions -
Conference paperAlmeida T, Kasama TP, Muxworthy AR, et 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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