Unbending combined with dehydration embrittlement as a cause for double and triple seismic zones
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- Kelin Wang
- Geological Survey of Canada Pacific Geoscience Centre Sidney British Columbia Canada
書誌事項
- 公開日
- 2002-09
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1029/2002gl015441
- 公開者
- American Geophysical Union (AGU)
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説明
<jats:p>Using a model of elastic‐perfectly plastic plate, I demonstrate that plate unbending combined with dehydration embrittlement can account for the morphology and stresses of double or triple seismic zones (DSZ's or TSZ's) observed in many subducting slabs. Densifying metamorphic reactions may induce tensile stresses as well as high pore fluid pressures in the slab crust and thus generate the upper seismicity band of the TSZ. Limited dehydration may moderately elevate the fluid pressure in the slab mantle, but unbending usually dominates mantle stresses and results in another two seismicity bands. DSZ's are underdeveloped TSZ's.</jats:p>
収録刊行物
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- Geophysical Research Letters
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Geophysical Research Letters 29 (18), 1889-, 2002-09
American Geophysical Union (AGU)