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| HAL: hal-00107185, version 1 |
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| Earth Planet and Space 56 (12) (2004) 1233-1240 |
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| Structural evolution of the Nojima fault (Awaji Island, Japan) revisited from the GSJdrill hole at Hirabayashi. |
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| Anne-Marie Boullier 1Koichiro Fujimoto 2 |
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| (2004) |
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| Following the Hyogoken Nanbu earthquake (Januray 17, 1995, Mw = 7.2), three drillholes were sunk through the Nojima Fault (Awaji Island, Japan). Textural andpetrographic studies of the Geological Survey of Japan (GSJ) drill cores allow recognition of two deformation episodes. The first one is older than the deposition of the Middle to LateEocene Kobe Group, corresponds to a left-lateral movement on the Nojima fault and is expressed by pseudotachylytes, kinking of biotite crystals in the low-strain rocks and anintense laumontite hydrothermal alteration. The second one displaces the basal unconformity of the Kobe group, corresponds to a right-lateral reverse displacement and is expressed atleast by carbonate-filled hydraulic fractures and thin gouge zones. Different important deformation mechanisms are recorded by the fault rocks, but questions relating to theattribution of deformation and alteration features to one or other deformation episodes remain unresolved. |
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| 1: | Laboratoire de géophysique interne et tectonophysique (LGIT) |
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CNRS : UMR5559 – IRD – LCPC – OSUG – INSU – Université de Savoie – Université Joseph Fourier - Grenoble I |
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| 2: | Tokyo Gakugei |
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Gakugei University |
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| 3: | Geological Survey of Japan (AIST) |
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Earthquake Research Group |
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| 4: | Gifu University |
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Gifu University |
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| 5: | Department of Earth Science |
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Basel University |
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| 6: | Université de Franche-Comté |
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Université de Franche-Comté |
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| 7: | ENS Mines |
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Ecole Nationale Supérieure des Mines de Nancy (ENSMN) |
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| 8: | Département des Sciences de la Terre |
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Université de Lille |
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| 9: | Institut des Sciences de la Terre, de l'Environnement et de l'Espace de Montpellier (ISTEEM) |
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CNRS : FR2035 – Université Montpellier II - Sciences et Techniques du Languedoc |
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| Subject | : | Sciences of the Universe/Earth Sciences/Tectonics |
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| Attached file list to this document: | |||||
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| hal-00107185, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00107185 | |
| oai:hal.archives-ouvertes.fr:hal-00107185 | |
| From: Pascale Talour | |
| Submitted on: Tuesday, 17 October 2006 15:45:18 | |
| Updated on: Monday, 26 February 2007 14:44:39 | |
