AMS data and EBSD maps of small scale marble shear zone - Estremoz, Portugal
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2019
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| _version_ | 1867172339412631552 |
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| author | Kusbach, Vladimír K Machek, Matěj Roxerová, Zuzana Racek, Martin Silva, Pedro F |
| author_facet | Kusbach, Vladimír K Machek, Matěj Roxerová, Zuzana Racek, Martin Silva, Pedro F |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We studied two structural profiles across subvertical thin shear zone in marble from quarry in Estremoz (Portugal) to clarify a relationship between AMS and strain in natural rocks. The mesoscopic fabric can be described as changing from the subhorizontal coarse-grained foliation towards the ∼2cm-wide shear zone center with subvertical fine-grained foliation. In microstructure, the shear zone records dynamic recrystallization of calcite aggregate which resulted in development of porphyroclastic microstructure with increasing proportion of fine-grained recrystallized matrix towards the shear zone center. Two distinct crystallographic preferred orientations of calcite were recorded. One related with porphyroclasts, characterized by subvertical orientation of calcite <c> axes and another associated with recrystallized matrix showing subhorizontal calcite <c> axes orientation. The majority of the rock mass is diamagnetic, corresponding well with the thermomagnetic curves, with local paramagnetic accumulations in form of thin bands. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_899435 |
| institution | PANGAEA |
| language | en |
| publishDate | 2019 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | AMS data and EBSD maps of small scale marble shear zone - Estremoz, Portugal Kusbach, Vladimír K Machek, Matěj Roxerová, Zuzana Racek, Martin Silva, Pedro F Anisotropy-magnetic susceptibility, factor F, foliation; Anisotropy-magnetic susceptibility, factor L, lineation; Anisotropy-magnetic susceptibility, factor P, anisotropy degree; Anisotropy-magnetic susceptibility, factor Pj; Anisotropy-magnetic susceptibility, factor T; Anisotropy-magnetic susceptibility, factor U; Coordinate, x, relative; Coordinate, y, relative; Declination of principle axis K1; Declination of principle axis K2; Declination of principle axis K3; Description of symmetrical anisotropy of magnetic susceptibility tensor; Disused_marble_quary; Estremoz, Portugal; Fitting error angle of the principal direction; F-statistics of the test for anisotropy; Geological sample; GEOS; Inclination of principle axis K1; Inclination of principle axis K2; Inclination of principle axis K3; Magnetic field strength; Magnetic susceptibility; Operation mode; Rock type; Sample code/label; Specimen orientation declination; Specimen orientation inclination We studied two structural profiles across subvertical thin shear zone in marble from quarry in Estremoz (Portugal) to clarify a relationship between AMS and strain in natural rocks. The mesoscopic fabric can be described as changing from the subhorizontal coarse-grained foliation towards the ∼2cm-wide shear zone center with subvertical fine-grained foliation. In microstructure, the shear zone records dynamic recrystallization of calcite aggregate which resulted in development of porphyroclastic microstructure with increasing proportion of fine-grained recrystallized matrix towards the shear zone center. Two distinct crystallographic preferred orientations of calcite were recorded. One related with porphyroclasts, characterized by subvertical orientation of calcite <c> axes and another associated with recrystallized matrix showing subhorizontal calcite <c> axes orientation. The majority of the rock mass is diamagnetic, corresponding well with the thermomagnetic curves, with local paramagnetic accumulations in form of thin bands. |
| title | AMS data and EBSD maps of small scale marble shear zone - Estremoz, Portugal |
| topic | Anisotropy-magnetic susceptibility, factor F, foliation; Anisotropy-magnetic susceptibility, factor L, lineation; Anisotropy-magnetic susceptibility, factor P, anisotropy degree; Anisotropy-magnetic susceptibility, factor Pj; Anisotropy-magnetic susceptibility, factor T; Anisotropy-magnetic susceptibility, factor U; Coordinate, x, relative; Coordinate, y, relative; Declination of principle axis K1; Declination of principle axis K2; Declination of principle axis K3; Description of symmetrical anisotropy of magnetic susceptibility tensor; Disused_marble_quary; Estremoz, Portugal; Fitting error angle of the principal direction; F-statistics of the test for anisotropy; Geological sample; GEOS; Inclination of principle axis K1; Inclination of principle axis K2; Inclination of principle axis K3; Magnetic field strength; Magnetic susceptibility; Operation mode; Rock type; Sample code/label; Specimen orientation declination; Specimen orientation inclination |
| url | https://doi.org/10.1594/PANGAEA.899435 |