Results 21 to 30 of about 1,210,365 (395)

Scheme of periodization of faulting stages in the Earth's crust of the Ukrainian shield - new data

open access: yesГеофизический журнал, 2014
On the basis of petrological study and reference isotopic geochronological age determinations of Precambrian rocks of the Ukrainian shield (USh), published lately, a refined geochronological scale of stages of deformation (faulting) of the Earth's crust ...
O.B. Gintov
doaj   +1 more source

Sea Beam Survey of an Active Strike-Slip Fault: The San Clemente Fault in the California Continental Borderland [PDF]

open access: yes, 1989
The San Clemente fault, located in the California Continental Borderland, is an active, northwest trending, right-lateral, wrench fault. Sea Beam data are used to map the major tectonic landforms associated with active submarine faulting in detail ...
de Moustier, Christian   +4 more
core   +2 more sources

“Empirical Prewhitening” Spectral Analysis Detects Periodic but Inconsistent Signals in Abyssal Hill Morphology at the Southern East Pacific Rise

open access: yesGeochemistry, Geophysics, Geosystems, 2020
The existence, or not, of periodicities in abyssal hill morphology has been vigorously debated in recent publications, and some have hypothesized that such periodicities are evidence of the impact of Milankovitch cycle‐caused sea level fluctuations on ...
John A. Goff
doaj   +1 more source

Regularities of crustal faulting and tectonophysical indicators of fault metastability

open access: yesГеодинамика и тектонофизика, 2018
The problem of forecasting seismic hazards is discussed. The stress state data characterizing various aspects of brittle failure are reviewed in detail. It is shown that the most convenient tool for analyzing such data is the Mohr stress diagram and the ...
Yu. L. Rebetsky
doaj   +1 more source

The 1980, 1997 and 1998 Azores earthquakes and its seismotectonic implications [PDF]

open access: yes, 2007
We have studied the focal mechanisms of the 1980, 1997 and 1998 earthquakes in the Azores region from body-wave inversion of digital GDSN (Global Digital Seismograph Network) and broadband data. For the 1980 and 1998 shocks, we have obtained strike– slip
Bezzeghoud, M.   +4 more
core   +1 more source

Fault and magmatic interaction within Iceland's western rift over the last 9kyr [PDF]

open access: yes, 2003
We present high-resolution 'Chirp' sub-bottom profiler data from Thingvallavatn, a lake in Iceland's western rift zone. These data are combined with stratigraphic constraints from sediment cores to show that movement on normal faults since 9 ka are ...
A. I. Best   +13 more
core   +1 more source

The Internal Structural Evolution of Calderas: Results from 3D Discrete Element Simulations

open access: yesGeosciences, 2019
The structural evolution of calderas is a key issue in volcanology and has profound implications for hazard analysis and the exploitation of geothermal energy and hydrothermal ores.
Stuart Hardy
doaj   +1 more source

Earthquake faulting in subduction zones: insights from fault rocks in accretionary prisms

open access: yesProgress in Earth and Planetary Science, 2014
Subduction earthquakes on plate-boundary megathrusts accommodate most of the global seismic moment release, frequently resulting in devastating damage by ground shaking and tsunamis.
K. Ujiie, G. Kimura
semanticscholar   +1 more source

Weak, Seismogenic Faults Inherited From Mesozoic Rifts Control Mountain Building in the Andean Foreland

open access: yesGeochemistry, Geophysics, Geosystems, 2022
New earthquake focal mechanism and centroid depth estimates show that the deformation style in the forelands of the Andes is spatially correlated with rift systems that stretched the South American lithosphere in the Mesozoic.
Sam Wimpenny
doaj   +1 more source

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