Role of Shallow Phase Changes in the Subduction of Oceanic Crust
- 3 June 1983
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 220 (4601) , 1045-1047
- https://doi.org/10.1126/science.220.4601.1045
Abstract
Detailed studies of the seismicity of several subduction zones demonstrate that shallow-dipping thrust zones turn to steeper angles at depths of about 40 kilometers. An increased downward body force resulting from shallow phase changes in subducted oceanic crust may be the cause of this increased dip angle. In addition, the volume reduction associated with phase changes may produce sufficiently large stresses in neighboring rocks to cause the seismicity of the upper Benioff zone.Keywords
This publication has 16 references indexed in Scilit:
- Thermal stresses in subducting lithosphere can explain double seismic zonesNature, 1982
- A triple-planed structure of seismicity and earthquake mechanisms at the subduction zone off Miyagi Prefecture, northern Honshu, JapanEarth and Planetary Science Letters, 1981
- Double seismic zones and stresses of intermediate depth earthquakesGeophysical Journal International, 1981
- Mechanism and tectonic implications of the great Banda Sea earthquake of November 4, 1963Physics of the Earth and Planetary Interiors, 1981
- Phase changes and the frequency‐magnitude distribution in the upper plane of the deep seismic zone beneath Tohoku, JapanJournal of Geophysical Research, 1980
- Double-planed deep seismic zone and upper-mantle structure in the Northeastern Japan ArcGeophysical Journal International, 1978
- Double-planed structure of the deep seismic zone in the northeastern Japan arcTectonophysics, 1978
- Calculation of the thermodynamic consequences of dehydration in subducting oceanic crust to 100 kb and > 800 degrees CAmerican Journal of Science, 1978
- Compositional and density stratification in oceanic lithosphere-causes and consequencesJournal of the Geological Society, 1977
- Gabbro‐eclogite reaction rate and its geophysical significanceReviews of Geophysics, 1975