Journal of Geophysical Research: Solid Earth
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Thermo‐poro‐mechanics of chemically active creeping faults. 1: Theory and steady state considerations
Journal of Geophysical Research: Solid Earth - Tập 119 Số 6 - Trang 4558-4582 - 2014
AbstractIn this paper, we study the behavior of a fluid‐saturated fault under
shear, based on the assumption that the material inside exhibits rate‐ and
temperature‐dependent frictional behavior. A creeping fault of this type can
produce excess heat due to shear heating, reaching temperatures which are high
enough to trigger endothermic chemical reactions. We focus on fluid‐release
reactions and i...
Thermo‐poro‐mechanics of chemically active creeping faults: 2. Transient considerations
Journal of Geophysical Research: Solid Earth - Tập 119 Số 6 - Trang 4583-4605 - 2014
AbstractThis work studies the transient behavior of a chemically active,
fluid‐saturated fault zone under shear. These fault zones are displaying a
plethora of responses spanning from ultrafast instabilities, like thermal
pressurization, to extremely slow creep localization events on geological
timescales. These instabilities can be described by a single model of a
rate‐dependent and thermally dep...
Thermo‐poro‐mechanics of chemically active creeping faults: 3. The role of serpentinite in episodic tremor and slip sequences, and transition to chaos
Journal of Geophysical Research: Solid Earth - Tập 119 Số 6 - Trang 4606-4625 - 2014
AbstractDuring the last decade, knowledge over episodic tremor and slip (ETS)
events has increased dramatically owing to the widespread installation of GPS
and seismic networks. The most puzzling observations are (i) the periodic nature
of slow seismic events, (ii) their localization at intermediate depths
(estimated 15–40 km), and (iii) the origin of the nonvolcanic fluids that are
responsible fo...
Upscaling of Elastic Properties in Carbonates: A Modeling Approach Based on a Multiscale Geophysical Data Set
Journal of Geophysical Research: Solid Earth - Tập 124 Số 12 - Trang 13021-13038 - 2019
AbstractLinking ultrasonic measurements made on samples, with sonic logs and
seismic subsurface data, is a key challenge for the understanding of carbonate
reservoirs. To deal with this problem, we investigate the elastic properties of
dry lacustrine carbonates. At one study site, we perform a seismic refraction
survey (100 Hz), as well as “sonic” (54 kHz) and ultrasonic (250 kHz)
measurements dir...
The effects of magma flux variations on the formation and lifetime of large silicic magma chambers
Journal of Geophysical Research: Solid Earth - Tập 118 Số 3 - Trang 926-942 - 2013
Incremental emplacement of large silicic intrusions limits the size and lifetime
of any magma chamber if earlier injected magma pulses solidify before the next
pulse is emplaced. Geochronology indicates that long‐term average magma fluxes
of plutons are too low for the accumulation of magma volumes larger than a
single pulse. To better constrain the formation of large‐volume magma chambers,
we inv...
Fracture toughness anisotropy in shale
Journal of Geophysical Research: Solid Earth - Tập 121 Số 3 - Trang 1706-1729 - 2016
AbstractThe use of hydraulic fracturing to recover shale gas has focused
attention on the fundamental fracture properties of gas‐bearing shales, but
there remains a paucity of available experimental data on their mechanical and
physical properties. Such shales are strongly anisotropic, so that their
fracture propagation trajectories depend on the interaction between their
anisotropic mechanical pr...
Understanding the Geodetic Signature of Large Aquifer Systems: Example of the Ozark Plateaus in Central United States
Journal of Geophysical Research: Solid Earth - Tập 127 Số 3 - 2022
AbstractThe continuous redistribution of water involved in the hydrologic cycle
leads to deformation of the solid Earth. On a global scale, this deformation is
well explained by the loading imposed by hydrological mass variations and can be
quantified to first order with space‐based gravimetric and geodetic
measurements. At the regional scale, however, aquifer systems also undergo
poroelastic defo...
The breakup of East Gondwana: Assimilating constraints from Cretaceous ocean basins around India into a best‐fit tectonic model
Journal of Geophysical Research: Solid Earth - Tập 118 Số 3 - Trang 808-822 - 2013
AbstractPublished models for the Cretaceous seafloor‐spreading history of East
Gondwana result in unlikely tectonic scenarios for at least one of the plate
boundaries involved and/or violate particular constraints from at least one of
the associated ocean basins. We link East Gondwana spreading corridors by
integrating magnetic and gravity anomaly data from the Enderby Basin off East
Antarctica wi...
Early India‐Australia spreading history revealed by newly detected Mesozoic magnetic anomalies in the Perth Abyssal Plain
Journal of Geophysical Research: Solid Earth - Tập 118 Số 7 - Trang 3275-3284 - 2013
AbstractThe seafloor within the Perth Abyssal Plain (PAP), offshore Western
Australia, is the only section of crust that directly records the early
spreading history between India and Australia during the Mesozoic breakup of
Gondwana. However, this early spreading has been poorly constrained due to an
absence of data, including marine magnetic anomalies and data constraining the
crustal nature of ...
The Tectonic origin of the Bay of Bengal and Bangladesh
Journal of Geophysical Research: Solid Earth - Tập 121 Số 7 - Trang 4836-4851 - 2016
AbstractWe are able to decipher the tectonic evolution of the Bay of Bengal, a
puzzle which has not been satisfactorily solved in the past, and we are also
able to shed new light on origin of the buried 85°E Ridge. We do so by
incorporating a number of disparate items into a unified solution. These items
are the marine magnetic anomalies in the Western Basin of the Bay of Bengal, the
Rajmahal and ...
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