Temperature and rate dependent deformation of halite

Carter, Neville L.; Heard, H.C.

doi:10.2475/ajs.269.3.193

Cited by 172 publications

(81 citation statements)

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“…This conclusion is supported by the fact that this slip system shows the lowest critical resolved shear stress (CRSS) in halite at all temperatures (e.g. Carter and Heard 1970;. However, the maxima near the centre of the added {220} and {420} pole figures are slightly distorted, suggesting that the orientation of the rotation axis changes across the fold.…”

Section: Ductile Deformationmentioning

confidence: 80%

“…As in this case bending or folding is most likely achieved by intracrystalline slip, the orientation of the crystal lattice with respect to the stress field is crucial for activation, because the CRSS are quite different for the different slip systems of rock salt (e.g. Carter and Heard 1970;. The X-ray measurements have shown that the lamination of the Kristallbrocken is approximately parallel to the {220} plane.…”

Section: Rheological Specification Of the Kristallbrockenmentioning

confidence: 99%

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Structural characteristics of the halite fabric type ‘Kristallbrocken’ from the Zechstein Basin with regard to its development

Küster

Leiss²,

Schramm

2008

Int J Earth Sci (Geol Rundsch)

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Section: Ductile Deformationmentioning

confidence: 80%

Section: Rheological Specification Of the Kristallbrockenmentioning

confidence: 99%

Structural characteristics of the halite fabric type ‘Kristallbrocken’ from the Zechstein Basin with regard to its development

Küster

Leiss²,

Schramm

2008

Int J Earth Sci (Geol Rundsch)

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“…The deformation behavior of single crystal NaCl (e.g. Carter and Heard, 1970) and periclase (e.g. Routbort, 1979;Day and Stokes, 1966) have been studied in detail.…”

Section: Halitementioning

confidence: 99%

Two-phase deformation of lower mantle mineral analogs

Kaercher

Miyagi

Kanitpanyacharoen

et al. 2016

Earth and Planetary Science Letters

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Editor: J. BrodholtKeywords: crystallographic preferred orientation seismic anisotropy two-phase deformation lower mantle rheology 3D X-ray microtomographyThe lower mantle is estimated to be composed of mostly bridgmanite and a smaller percentage of ferropericlase, yet very little information exists for two-phase deformation of these minerals. To better understand the rheology and active deformation mechanisms of these lower mantle minerals, especially dislocation slip and the development of crystallographic preferred orientation (CPO), we deformed mineral analogs neighborite (NaMgF 3 , iso-structural with bridgmanite) and halite (NaCl, isostructural with ferropericlase) together in the deformation-DIA at the Advanced Photon Source up to 51% axial shortening. Development of CPO was recorded in situ with X-ray diffraction, and information on microstructural evolution was collected using X-ray microtomography. Results show that when present in as little as 15% volume, the weak phase (NaCl) controls the deformation. Compared to single phase NaMgF 3 samples, samples with just 15% volume NaCl show a reduction of CPO in NaMgF 3 and weakening of the aggregate. Microtomography shows both NaMgF 3 and NaCl form highly interconnected networks of grains. Polycrystal plasticity simulations were carried out to gain insight into slip activity, CPO evolution, and strain and stress partitioning between phases for different synthetic two-phase microstructures. The results suggest that ferropericlase may control deformation in the lower mantle and reduce CPO in bridgmanite, which implies a less viscous lower mantle and helps to explain why the lower mantle is fairly isotropic.

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“…The texture is only slightly stronger for the sample deformed at lower temperature (1200 K). This suggests that temperature plays a relevant role on deformation mechanisms of magnesiowűstite, similar to isostructural halite (Carter and Heard, 1970). Heidelbach et al (2003) studied texture evolution as function of strain, observing a change from a dislocation creep texture at low strains to a recrystallization texture at high strains.…”

Section: Elastic Anisotropy and Stressmentioning

confidence: 99%

Texture development and elastic stresses in magnesiowűstite at high pressure

et al. 2006

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Cubic magnesiowűstite has been deformed in a diamond anvil cell at room temperature. GPa and 18 GPa, respectively. The diffraction images, obtained with the radial diffraction technique, are analyzed using both single peak intensities and a Rietveld method. For all samples, we observe a [100] fiber texture but the texture strength decreases with increasing iron content. This texture pattern is consistent with {110}<1-10> slip. The images were also analyzed for stress, elastic strains and elastic anisotropy. In general, the stress measured in magnesiowűstite samples is lower than previously measured on MgO. The elastic anisotropy deduced from the X-ray measurements shows a broad agreement with models based on measurements with other techniques.

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Temperature and rate dependent deformation of halite

Cited by 172 publications

References 0 publications

Structural characteristics of the halite fabric type ‘Kristallbrocken’ from the Zechstein Basin with regard to its development

Structural characteristics of the halite fabric type ‘Kristallbrocken’ from the Zechstein Basin with regard to its development

Two-phase deformation of lower mantle mineral analogs

Texture development and elastic stresses in magnesiowűstite at high pressure

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