Results 151 to 160 of about 77,777 (186)

Tectonic stress in the plates

Reviews of Geophysics, 1979
The state of stress in the lithosphere provides strong constraints on the forces acting on the plates. The directions of principal stresses in the plates as indicated by midplate earthquake mechanisms, in situ stress measurements, and stress‐sensitive geological features are used to test plate tectonic driving force models, under the premises that ...
Randall M. Richardson, Sean C. Solomon, Norman H. Sleep   +2 more
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Global patterns of tectonic stress

Nature, 1989
Regional patterns of present-day tectonic stress can be used to evaluate the forces acting on the lithosphere and to investigate intraplate seismicity. Most intraplate regions are characterized by a compressional stress regime; extension is limited almost entirely to thermally uplifted regions.
Zoback, Mary Lou, Zoback, Mark D., Adams, J., Assumpção, M., Bell, S., Bergman, E. A., Blümling, P., Brereton, N. R., Denham, D., Ding, J., Fuchs, K., Gay, N., Gregersen, S., Gupta, H. K., Gvishiani, A., Jacob, K., Klein, R., Knoll, P., Magee, M., Mercier, J. L., Müller, B. C., Paquin, C., Rajendran, K., Stephansson, O., Suarez, G., Suter, M., Udias, A., Xu, Z. H., Zhizhin, M.   +28 more
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Tectonic stresses in the lithosphere

Tectonics, 1983
Various types of observables (earthquake focal mechanisms, in situ measurements and geological deformations) give information about the large scale lithospheric stress field. The latter has often been explained by postulating appropriate forces acting at the edges and beneath the plates. This approach ignores the role of mass heterogeneities within the
Luce Fleitout, Claude Froidevaux
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Central Europe: Active or Residual Tectonic Stresses

pure and applied geophysics, 1977
The regional stress field in the Western Alps and their northern foreland has been investigated by in situ stress determinations. More than 600 strain relief measurements were made with resistance strain gages in boreholes carried out in mines, tunnels and quarries. The stresses calculated and data obtained from other papers were used to get a detailed
Gerhard Greiner, J. Henning Illies
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Tectonic Stresses in France

1980
A flat jack method has been used to determine the principal stress axes in the Jurassic limestone of the basin of Paris and in neighbouring regions. The results have been compared with a few overcoring measurements in boreholes of a few meters.
C. Paquin, C. Froidevaux
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Mapping Tectonic Stress Using Earthquakes

AIP Conference Proceedings, 2005
An earthquakes occurs when the forces acting on a fault overcome its intrinsic strength and cause it to slip abruptly. Understanding more specifically why earthquakes occur at particular locations and times is complicated because in many cases we do not know what these forces actually are, or indeed what processes ultimately trigger slip.
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Tectonic Stress Fields and Karst

2014
Many natural causes exist controlling the formation of fractures. The rock properties relating to the brittleness is one of the most important of them for the variations in natural fracture density. These properties may vary from regional to local scale; they may vary significantly within the rock formations and between formations.
Stefan Shanov, Konstantin Kostov
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Late Aftershocks, Tectonic Stress and Dilatancy

Nature, 1973
THE focal mechanisms of micro-aftershocks occurring 3.5 yr after the Inangahua (New Zealand) earthquake of May 23, 1968 (magnitude 7.1), differ drastically from those of the main shock and early aftershocks and are in apparent conflict with the known tectonic stress.
F. F. EVISON, R. ROBINSON, W. J. ARABASZ
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Earthquake Stress Drops, Ambient Tectonic Stresses and Stresses That Drive Plate Motions

pure and applied geophysics, 1977
A variety of geophysical observations suggests that the upper portion of the lithosphere, herein referred to as the elastic plate, has long-term material properties and frictional strength significantly greater than the lower lithosphere. If the average frictional stress along the non-ridge margin of the elastic plate is of the order of a kilobar, as ...
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TECTONIC STRESS REGIME RECORDED BY ZIRCON TH/U

Geological Society of America Abstracts with Programs, 2018
Abstract Detrital zircon geochronology is a powerful tool for investigating sedimentary provenance, but U-Pb zircon ages alone cannot distinguish between source terranes with similar age signatures. We integrate recent developments in petrochronology with sedimentary provenance analyses by investigating the relationship between tectonic stress regime
Matthew P. McKay, William T. Jackson, Angela M. Hessler   +2 more
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