Determination of deviatoric stress tensors based on inversion of calcite twin data from experimentally deformed monophase samples: preliminary results

Lacombe, Olivier; Laurent, Philippe

doi:10.1016/0040-1951(95)00136-0

Cited by 93 publications

(68 citation statements)

References 21 publications

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“…The equivalent stresses reported by other researchers in twinned calcite polycrystals vary widely from smaller than 40 MPa (Lacombe and Laurent, 1996) to greater than 160 MPa . The stress measured in the host domains (*60 MPa) in this marble sample is lower than in the quartzite from the Vredefort meteorite impact site in South Africa (90 MPa) but much higher than in quartz from moderately deformed granite (18 MPa) (Chen et al 2011).…”

Section: Discussionmentioning

confidence: 97%

Deformation twinning and residual stress in calcite studied with synchrotron polychromatic X-ray microdiffraction

et al. 2011

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Microstructures of deformed calcite in marble from the Bergell Alps are studied by using a microfocused polychromatic synchrotron X-ray beam. The high spatial resolution, together with orientation and strain resolutions, reveals twin plane orientation, multiple twin lamellae, and strain distributions associated with the twins. Single and multiple mechanical twins on e ¼ 0118 È É systems are confirmed. Residual stresses are derived from the strain tensor that is derived from Laue diffraction patterns. Average lattice strains from several hundred to over one thousand microstrains are detected in a deformed marble from the Bergell Alps. Such strains suggest 60-120 MPa residual stresses. A detailed study of strain components shows that shear stresses on twin planes are completely released.

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Section: Discussionmentioning

confidence: 97%

Deformation twinning and residual stress in calcite studied with synchrotron polychromatic X-ray microdiffraction

et al. 2011

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“…The formation of calcite e-twins requires a shear stress exceeding ca. 10 MPa (Wenk et al 1987;Burkhard 1993;Lacombe and Laurent 1996;Ferrill 1998). Calcite offers three glide systems for e-twinning.…”

Section: Methodsmentioning

confidence: 99%

Volcanic Initiation of the Eocene Heart Mountain Slide, Wyoming, USA

Malone

Craddock

Schmitz

et al. 2017

The Journal of Geology

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Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. A B S T R A C TThe Eocene Heart Mountain slide of northwest Wyoming covers an area of as much as 5000 km 2 and includes allochthonous Paleozoic carbonate and Eocene volcanic rocks with a run-out distance of as much as 85 km. Recent geochronologic data indicated that the emplacement of the slide event occurred at ∼48.9 Ma, using laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) extracted from U-Pb zircon ages from basal layer and injectite carbonate ultracataclasite (CUC). We now refine that age with U-Pb results from a lamprophyre diatreme that is temporally and spatially related to the CUC injectites. The ages for the lamprophyre zircons are 48.97 5 0.36 Ma (LA-ICPMS) and 49.19 50.02 Ma (chemical abrasion isotope dilution thermal ionization mass spectrometry). Thus, the lamprophyre and CUC zircons are identical in age, and we interpret that the zircons in the CUC were derived from the lamprophyre during slide emplacement. Moreover, the intrusion of the lamprophyre diatreme provided the trigger mechanism for the Heart Mountain slide. Additional structural data are presented for a variety of calcite twinning strains, results from anisotropy of magnetic susceptibility for the lamprophyre and CUC injectites and alternating-field demagnetization on the lamprophyre, to help constrain slide dynamics. These data indicate that White Mountain experienced a rotation about a vertical axis and minimum of 357 of counterclockwise motion during emplacement.

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“…Whilst present day differential stress levels in the earth's upper crust can be measured directly or inferred by many methods (Engelder 1993), states of stress over geologic time are not so easily determined, and results often have substantial uncertainties. Palaeostress magnitudes have been examined in foreland regions (Lacombe and Laurent, 1996;craddock and der Pluijm, 1999) and also across continental interiors (van der Pluijm et al 1997) leading to an observation of regional scale stress attenuation with distance away from orogenic belts. studies of stress levels associated with fold-thrust development in foreland fold-thrust belts have been less common however (Lacombe 2001).…”

Section: Introductionmentioning

confidence: 99%

How hard were the Jura mountains pushed?

Hindle

2008

Swiss J. Geosci.

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the mechanical twinning of calcite is believed to record past differential stress values, but validating results in the context of past tectonic situations has been rarely attempted. Using assumptions of linear gradients of stress components with depth, a stress gradient based on twinning palaeopiezometry is derived for the swiss Molasse basin, the indenter region to the Jura fold and thrust belt. When integrated into a model of the retrodeformed Jura-Molasse system, allowing horizontal stress concentration and conservation along the original taper geometry, the stress profile proves consistent with the position of the Jura-Molasse (ftb-indenter) transition. the model demonstrates mechanically why the Plateau Molasse portion of the Molasse basin remained relatively undeformed when transmitting tectonic forces applied to the Jura mountains.

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Determination of deviatoric stress tensors based on inversion of calcite twin data from experimentally deformed monophase samples: preliminary results

Cited by 93 publications

References 21 publications

Deformation twinning and residual stress in calcite studied with synchrotron polychromatic X-ray microdiffraction

Deformation twinning and residual stress in calcite studied with synchrotron polychromatic X-ray microdiffraction

Volcanic Initiation of the Eocene Heart Mountain Slide, Wyoming, USA

How hard were the Jura mountains pushed?

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