Anisotropic viscoelastic properties of quartz and quartzite in the vicinity of the α–β phase transition

Klumbach, Steffen; Schilling, Frank

doi:10.1007/s00269-017-0888-z

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Cited by 2 publications

References 30 publications

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Test Techniques and Test Systems

2022

Engineering Physics of High‐Temperature Materials

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Test Techniques and Test Systems

2022

Engineering Physics of High‐Temperature Materials

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Stressful crystal histories recorded around melt inclusions in volcanic quartz

Cadena,

Manga,

Befus

et al. 2024

Contrib Mineral Petrol

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Magma ascent and eruption are driven by a set of internally and externally generated stresses that act upon the magma. We present microstructural maps around melt inclusions in quartz crystals from six large rhyolitic eruptions using synchrotron Laue X-ray microdiffraction to quantify elastic residual strain and stress. We measure plastic strain using average diffraction peak width and lattice misorientation, highlighting dislocations and subgrain boundaries. Quartz crystals across studied magma systems preserve similar and relatively small magnitudes of elastic residual stress (mean 53–135 MPa, median 46–116 MPa) in comparison to the strength of quartz (~ 10 GPa). However, the distribution of strain in the lattice around inclusions varies between samples. We hypothesize that dislocation and twin systems may be established during compaction of crystal-rich magma, which affects the magnitude and distribution of preserved elastic strains. Given the lack of stress-free haloes around faceted inclusions, we conclude that most residual strain and stress was imparted after inclusion faceting. Fragmentation may be one of the final strain events that superimposes stresses of ~ 100 MPa across all studied crystals. Overall, volcanic quartz crystals preserve complex, overprinted deformation textures indicating that quartz crystals have prolonged deformation histories throughout storage, fragmentation, and eruption.

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Anisotropic viscoelastic properties of quartz and quartzite in the vicinity of the α–β phase transition

Cited by 2 publications

References 30 publications

Test Techniques and Test Systems

Test Techniques and Test Systems

Stressful crystal histories recorded around melt inclusions in volcanic quartz

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