Earthquake fault rock indicating a coupled lubrication mechanism

DOI DOI PDF PDF 被引用文献17件 オープンアクセス

書誌事項

公開日
2006-12-20
DOI
  • 10.5194/ee-1-23-2006
  • 10.5194/eed-1-135-2006
公開者
Copernicus GmbH

説明

A pseudotachylyte bounded by a carbonate-matrix implosion breccia was found at a fossilized out-of-sequence thrust in the Shimanto accretionary complex, Japan. This occurrence resulted from the following events: first implosion of host rock due to interstitial fluid pressure increase and asymmetric fracturing; second, Ca-Fe-Mg carbonate precipitation; and third, frictional melting. The rock-record suggests that these events took place in a single seismogenic slip event. Resulting from abrupt drop in fluid pressure after implosion, hydro-fracturing and fluid escape, recovered high effective friction promoted melting during fault movement. Coexistence of fluid implosion breccia and pseudotachylyte has never been reported from continental pseudotachylytes, but might be characteristic from hydrous seismogenic faults in subduction zones.

International audience

収録刊行物

  • eEarth

    eEarth 1 (1), 23-28, 2006-12-20

    Copernicus GmbH

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