FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W38923483> ?p ?o ?g. }

• W38923483 startingPage "9776" @default.
• W38923483 abstract "Fracturing of rocks in natural fault zones increases the permeability and produces extremely small grain sizes (< 0.1 μm). This fine grain size is a potential precursor to viscous deformation by diffusion creep, even at low temperatures if fluids are present. The aim of this study is to test the potential transition from frictional to viscous deformation in very fine-grained gouge material. We have performed a series of simple shear deformation experiments on fault gouge in a Griggs deformation apparatus. Crushed Verzasca gneiss powder (< 200 μm) with 0.2 wt% water added was placed between Verzasca Gneiss forcing blocks cut at 45 degrees and weld-sealed in a gold jackets. Before deformation, the gouge material needs to be compacted. This is achieved by a set 1 of frictional deformation experiments at different temperatures (T = 24 °C, 300 °C, 500 °C, Pc = 500 MPa, strain rate = 10ˆ-4) to shear strains of approximately gamma = 2.5. In the subsequent experiments (set 2), potential viscous deformation processes are tested in the pre-deformed gouge. After initial frictional deformation (set 1) the samples are left at peak differential stress conditions for one week. Finally, in a third type of experiments (set 3), the peak differential stress was lowered after frictional deformation to a level similar to the confining pressure and held constant for one week. In set 1, the peak shear stresses are temperature independent (given the limited stress resolution of the Griggs apparatus; 300° C = 780 – 870 MPa, 500° C = 760 – 820 MPa). In set 2, the stress relaxation after frictional deformation is clearly temperature dependent (after one week at 300° C, the shear stress is approx. 370 MPa; at 500° C, approx. 230 MPa). In set 3, no creep was observed. Further investigation of this phenomenon is required but probably the differential stress was too low. Microstructural observations show a striking difference between samples of set 1 and set 2. The samples deformed by initial friction only (set 1) show angular clasts and many small grains. The grain size distribution is similar to that observed in natural gouge material from seismic faults and to experimentally cracked granitoid material (Keulen et al. 2007, Heilbronner and Keulen 2006). In the creep-deformed samples (set 2), we observe the disappearance of the grains of < 0.1 μm size, cementation of individual grains into larger ones, and lobate grain boundaries in rounded clasts. Thus, solution – precipitation processes have taken place in creep experiments of experimentally produced gouge. The exact nature of the creep deformation is difficult to assess at this stage, because the stress levels necessary to achieve creep in the experiments so far are above the Goetze criterion." @default.
• W38923483 created "2016-06-24" @default.
• W38923483 creator A5037369788 @default.
• W38923483 creator A5065013493 @default.
• W38923483 creator A5073201334 @default.
• W38923483 date "2009-04-01" @default.
• W38923483 modified "2023-09-26" @default.
• W38923483 title "Transition from frictional to viscous deformation in granitoid fault rocks" @default.
• W38923483 cites W1968445789 @default.
• W38923483 cites W2146165228 @default.
• W38923483 hasPublicationYear "2009" @default.
• W38923483 type Work @default.
• W38923483 sameAs 38923483 @default.
• W38923483 citedByCount "0" @default.
• W38923483 crossrefType "journal-article" @default.
• W38923483 hasAuthorship W38923483A5037369788 @default.
• W38923483 hasAuthorship W38923483A5065013493 @default.
• W38923483 hasAuthorship W38923483A5073201334 @default.
• W38923483 hasConcept C101082671 @default.
• W38923483 hasConcept C127313418 @default.
• W38923483 hasConcept C149342994 @default.
• W38923483 hasConcept C149912024 @default.
• W38923483 hasConcept C159985019 @default.
• W38923483 hasConcept C165205528 @default.
• W38923483 hasConcept C171701179 @default.
• W38923483 hasConcept C175551986 @default.
• W38923483 hasConcept C187059263 @default.
• W38923483 hasConcept C187320778 @default.
• W38923483 hasConcept C192191005 @default.
• W38923483 hasConcept C192194790 @default.
• W38923483 hasConcept C192562407 @default.
• W38923483 hasConcept C199289684 @default.
• W38923483 hasConcept C204366326 @default.
• W38923483 hasConcept C205093917 @default.
• W38923483 hasConcept C26687426 @default.
• W38923483 hasConcept C2780012869 @default.
• W38923483 hasConcept C47908070 @default.
• W38923483 hasConcept C5900021 @default.
• W38923483 hasConcept C87976508 @default.
• W38923483 hasConcept C96035792 @default.
• W38923483 hasConceptScore W38923483C101082671 @default.
• W38923483 hasConceptScore W38923483C127313418 @default.
• W38923483 hasConceptScore W38923483C149342994 @default.
• W38923483 hasConceptScore W38923483C149912024 @default.
• W38923483 hasConceptScore W38923483C159985019 @default.
• W38923483 hasConceptScore W38923483C165205528 @default.
• W38923483 hasConceptScore W38923483C171701179 @default.
• W38923483 hasConceptScore W38923483C175551986 @default.
• W38923483 hasConceptScore W38923483C187059263 @default.
• W38923483 hasConceptScore W38923483C187320778 @default.
• W38923483 hasConceptScore W38923483C192191005 @default.
• W38923483 hasConceptScore W38923483C192194790 @default.
• W38923483 hasConceptScore W38923483C192562407 @default.
• W38923483 hasConceptScore W38923483C199289684 @default.
• W38923483 hasConceptScore W38923483C204366326 @default.
• W38923483 hasConceptScore W38923483C205093917 @default.
• W38923483 hasConceptScore W38923483C26687426 @default.
• W38923483 hasConceptScore W38923483C2780012869 @default.
• W38923483 hasConceptScore W38923483C47908070 @default.
• W38923483 hasConceptScore W38923483C5900021 @default.
• W38923483 hasConceptScore W38923483C87976508 @default.
• W38923483 hasConceptScore W38923483C96035792 @default.
• W38923483 hasLocation W389234831 @default.
• W38923483 hasOpenAccess W38923483 @default.
• W38923483 hasPrimaryLocation W389234831 @default.
• W38923483 hasRelatedWork W1493781969 @default.
• W38923483 hasRelatedWork W1519225997 @default.
• W38923483 hasRelatedWork W2001776172 @default.
• W38923483 hasRelatedWork W2006897394 @default.
• W38923483 hasRelatedWork W2009661307 @default.
• W38923483 hasRelatedWork W2021263570 @default.
• W38923483 hasRelatedWork W2033319426 @default.
• W38923483 hasRelatedWork W2062692849 @default.
• W38923483 hasRelatedWork W2065075733 @default.
• W38923483 hasRelatedWork W2070224895 @default.
• W38923483 hasRelatedWork W2076144769 @default.
• W38923483 hasRelatedWork W2088570952 @default.
• W38923483 hasRelatedWork W2134519846 @default.
• W38923483 hasRelatedWork W2314594766 @default.
• W38923483 hasRelatedWork W2968835375 @default.
• W38923483 hasRelatedWork W2983425535 @default.
• W38923483 hasRelatedWork W3028507769 @default.
• W38923483 hasRelatedWork W3044991346 @default.
• W38923483 hasRelatedWork W77739842 @default.
• W38923483 hasRelatedWork W2360954206 @default.
• W38923483 isParatext "false" @default.
• W38923483 isRetracted "false" @default.
• W38923483 magId "38923483" @default.
• W38923483 workType "article" @default.