EXPERIMENTAL EVIDENCE OF TRANSFORMATION PLASTICITY IN SILICATES: MINIMUM OF CREEP STRENGTH IN QUARTZ
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dc.contributor.author | Schmidt C. | |
dc.contributor.author | Bruhn D. | |
dc.contributor.author | Wirth R. | |
dc.date.accessioned | 2021-12-20T03:45:28Z | |
dc.date.available | 2021-12-20T03:45:28Z | |
dc.date.issued | 2003 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=1329990 | |
dc.identifier.citation | Earth and Planetary Science Letters, 2003, 205, 3-4, 273-280 | |
dc.identifier.issn | 0012-821X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/33651 | |
dc.description.abstract | Mechanical weakening due to solid state transformation of mineral phases has long been proposed to be a significant mechanism for localization of deformation in the Earth's lithosphere and the mantle transition zone. However, experimental observations confirming such a proposition are lacking. Here we present a novel approach to prove the existence of a minimum in the creep strength of quartz at the α-β transition by observing the deformation of fluid inclusions in a quartz crystal using a hydrothermal diamond-anvil cell. Pressure differences required for permanent deformation of the quartz around fluid inclusions were significantly lower at the phase transition than in either the stability fields of α- or β-quartz. These results indicate that transformation plasticity of silicates can indeed cause a considerable localized reduction in the strength of the Earth's crust and mantle. | |
dc.subject | FLUID INCLUSIONS | |
dc.subject | DEFORMATION | |
dc.subject | PLASTIC FLOW | |
dc.subject | DIAMOND-ANVIL CELL | |
dc.subject | PHASE TRANSITION | |
dc.title | EXPERIMENTAL EVIDENCE OF TRANSFORMATION PLASTICITY IN SILICATES: MINIMUM OF CREEP STRENGTH IN QUARTZ | |
dc.type | Статья |
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