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Journal Article
Published: 27 February 2020
Quarterly Journal of Engineering Geology and Hydrogeology (2020) qjegh2018-144.
... these complex deposits and what are the best techniques for examining important detailed aspects of 1D consolidation behaviour such as the identification of the apparent preconsolidation stress, the sometimes rapid rate of consolidation and creep, and also how to characterize the undrained shear strength...
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Journal Article
Journal: Geology
Published: 06 February 2020
Geology (2020) 48 (4): 379–384.
... this reflects persistent earthquake-generating fault patches surrounded by creep, or the presence of creep and earthquakes at different times along the same patch. We use new, autonomous underwater vehicle high-resolution seafloor mapping to image the morphology of and offsets along transform fault segments...
FIGURES
Journal Article
Published: 16 October 2019
Petroleum Geoscience (2019) 25 (4): 470–489.
..., the elastic properties of the rock and the inelastic deformation processes, such as creep, grain sliding and pressure solution, all exert a control on the fracture growth rates, and that more isotropic fracture networks will tend to develop if the vertical effective stress is low or if the fractures...
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Series: Geological Society, London, Special Publications
Published: 08 October 2019
DOI: 10.1144/SP483.16
EISBN: 9781786204523
.... The exception is known as creep, or aseismic slip, and is discussed below. Large earthquakes are more efficient at releasing the accumulating slip deficit because their large rupture areas ( c. 100 × 50 km) permit large amounts of slip (≥5 m). Thirty M w = 6 earthquakes must occur to match the energy released...
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Journal Article
Published: 23 July 2019
Quarterly Journal of Engineering Geology and Hydrogeology (2020) 53 (1): 31–38.
..., such as monitoring of ground settlements caused by structures, dam integrity and displacements of creeping landslides. In contrast to conventional methods, such as extensometer, geodetical or radar measurements, the distributed sensors offer gapless monitoring over the entire depth of the borehole. The paper offers...
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Journal Article
Journal: Geosphere
Published: 24 June 2019
Geosphere (2019) 15 (4): 1038–1065.
... variations in the subducted protoliths and that take the form of brittle pods and lenses within a viscous matrix. Microstructural observations indicate that the matrix lithologies (blueschists and quartz-rich metasediments) deformed by distributed power-law viscous flow accommodated by dislocation creep...
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Journal Article
Journal: Geology
Published: 31 May 2019
Geology (2019) 47 (8): 744–748.
... fault creep to slow and fast seismic rupture propagation is still poorly constrained by seismological and laboratory observations. Here, we reproduced in the laboratory the complete spectrum of natural faulting on samples of dolostones representative of the seismogenic layer in the region...
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Journal Article
Journal: Geology
Published: 21 March 2019
Geology (2019) 47 (5): 423–426.
..., but not among wetter sites. These trends suggest that the establishment of life in a landscape substantially accelerates soil creep, whereas differences in biological communities among sites with abundant moisture have a relatively small effect on creep. *Current address: Redwood Sciences Laboratory, U.S...
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Journal Article
Published: 01 January 2019
American Mineralogist (2019) 104 (1): 47–52.
... stress. Formation of CPO in mantle minerals is a consequence of the dominant slip systems in dislocation creep. The water-induced fabric transitions of olivine indicate that different slip systems dominate at different water contents. The A-, C-, E-type fabrics are assumed to be caused...
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Journal Article
Journal: Lithosphere
Published: 15 June 2018
Lithosphere (2018) 10 (5): 602–631.
... edges of the Durmid structure, perhaps due to the same kind of slow shallow creep that has been documented along the main strand of the San Andreas fault zone. Steep right and right-oblique faults and folds are the main structures in Pleistocene sediments deformed by the ∼1-km-wide East Shoreline fault...
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Journal Article
Journal: Geology
Published: 22 March 2018
Geology (2018) 46 (5): 475–478.
... of blueschists and eclogites that record prograde deformation, with peak metamorphism of 1200–1600 MPa and 450–550 °C. Field observations reveal that coexistence of blueschist and eclogite sets up an important rheological contrast: blueschists show distributed viscous dislocation creep, whereas eclogites...
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Journal Article
Published: 11 January 2018
Journal of Environmental and Engineering Geophysics (2017) 22 (4): 385–394.
...Chengwu Li; Qifei Wang; Dihao Ai; Lihui Dong; Feiyin Wang ABSTRACT A quasi-static uniaxial compression experiment was designed to simulate creep damage in coal. During the experiment, electromagnetic radiation (EMR) and acoustic emission (AE) signals were synchronously acquired. The energy of EMR...
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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP435.10
EISBN: 9781786202901
... was noted (7.5 and 8.5 MPa for L1 and L2, respectively). The targets for the confining pressure were selected to be 2 MPa above the yield stress, i.e. 9.5 and 10.5 MPa for cores L1 and L2. (5) The axial deformation at constant temperature, stress and pressure conditions (termed creep) was monitored...
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Journal Article
Journal: Geophysics
Published: 02 March 2017
Geophysics (2017) 82 (3): MR89–MR96.
...Céline Mallet; Beatriz Quintal; Eva Caspari; Klaus Holliger ABSTRACT We estimate attenuation at subseismic frequencies from an experimental creep test performed on a thermally cracked water-saturated glass sample. The time-dependent axial stress and strain rates are used to infer the attenuation...
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Journal Article
Journal: GSA Bulletin
Published: 01 March 2017
GSA Bulletin (2017) 129 (3-4): 304–317.
... of this sliding area. It consists of three E-W–oriented fault sectors that are seismically active and characterized by earthquakes up to 4.7 in magnitude (M) capable of producing ground rupture and damage located mainly along the western and central sectors, and by continuous creep on the eastern sector. A new...
Journal Article
Published: 01 November 2016
Environmental and Engineering Geoscience (2016) 22 (4): 341–351.
... simulation indicated that rear blocks acted on relatively stable key blocks during long-term gravitational creep on the weak interlayer. Strength reduction of the weak interlayer was a key factor in the rockslide occurrence. Ultimately, a three-dimensional limit equilibrium method of stability analysis...
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Journal Article
Published: 31 August 2016
Petroleum Geoscience (2017) 23 (1): 92–103.
... the samples for all values of the applied effective vertical stress and during shear reversal. The static transmissibility also decreases over time, which may be a result of creep deformation or the blocking of pore channels with gouge material. Our results indicate that once the gouge material is developed...
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