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Journal Article
Journal: Geology
Published: 12 July 2021
Geology (2021) 49 (10): 1255–1259.
... thermometry indicates that both veining and mylonitization occurred at ∼315–400 °C. The vein-filled fractures are interpreted as episodically triggered by viscous creep in the mylonite, where quartz piezometry and brittle failure modes are consistent with low (18–44 MPa) differential stress. The Sagelvvatn...
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Journal Article
Journal: Geology
Published: 01 June 2020
Geology (2020) 48 (9): 924–928.
... and fluid circulation ( Stanchits et al., 2003 ; Goodfellow et al., 2015 ). Laboratory experiments reveal that during the preparatory phase of an earthquake, creep accelerates with precursory changes in elastic wave velocity ( Kaproth and Marone, 2013 ; Latour et al., 2013 ; Passélegue et al., 2016...
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Journal Article
Journal: Geophysics
Published: 03 April 2020
Geophysics (2020) 85 (3): MR155–MR166.
...Ehsan Haghighat; Fatemeh S. Rassouli; Mark D. Zoback; Ruben Juanes ABSTRACT We have developed a viscoplastic model that reproduces creep behavior and inelastic deformation of rock during loading-unloading cycles. We use a Perzyna-type description of viscous deformation that derives from...
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Journal Article
Published: 01 March 2020
American Mineralogist (2020) 105 (3): 319–324.
... of Si under conditions in planetary and satellite cores is less than ∼1.2 km. Additionally, the estimated strain of plastic deformation in the Earth's inner core, caused by the Harper–Dorn creep, reaches more than 10 3 at a stress level of 10 3 –10 4 Pa, although the inner core might be slightly...
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Journal Article
Published: 27 February 2020
Quarterly Journal of Engineering Geology and Hydrogeology (2020) 53 (4): 475–522.
... 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...
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
... or calculated depth of the transition zone (between fully locked and freely creeping décollement) on the upper surface of the Indian Plate. For example, in central Nepal, convergence estimates vary from 15 mm a −1 ( Zheng et al. 2017 ; Lindsey et al. 2015 ) to 18 mm a −1 ( Ader et al. 2012...
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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...
Journal Article
Published: 01 January 2019
American Mineralogist (2019) 104 (1): 47–52.
... at water contents of 200 and of 500 to ~1100 ppm H/Si, respectively. They also suggested that the water content at the boundary of the E- to C-type decreases with increasing stress. Formation of CPO in mantle minerals is a consequence of the dominant slip systems in dislocation creep. The water-induced...
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Journal Article
Journal: Lithosphere
Publisher: GSW
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...
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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