Tilted block faulting (original) (raw)
Tilted block faulting, also called rotational block faulting, is a mode of structural evolution in extensional tectonic events, a result of tectonic plates stretching apart. When the upper lithospheric crust experiences extensional pressures, the brittle crust fractures, creating detachment faults. These normal faults express themselves on a regional scale; upper crust fractures into tilted fault blocks, and ductile lower crust ascends. This results in uplift, cooling, and exhumation of ductilely deformed deeper crust. The large unit of tilted blocks and associated crust can form an integral part of metamorphic core complexes, which are found on both continental and oceanic crust.
| Property | Value |
|---|---|
| dbo:abstract | En géologie, on appelle bloc basculé le bloc de croûte continentale situé entre deux failles normales listriques, dans un rift puis une marge passive. La géométrie courbe de la faille (pendage diminuant avec la profondeur) provoque le basculement du bloc et une sédimentation en éventail (sédiments synrift). La pente du milieu de dépôt augmentant avec le temps, on observe dans ces sédiments syn-rift la présence de nombreux slumps. Le graben des rifts étroits est dominé par des « murs » (pente de 10 à 45°) qui matérialisent les blocs crustaux découpés en « marches d'escalier » ou « touches de piano » par le jeu des failles bordières. (fr) Tilted block faulting, also called rotational block faulting, is a mode of structural evolution in extensional tectonic events, a result of tectonic plates stretching apart. When the upper lithospheric crust experiences extensional pressures, the brittle crust fractures, creating detachment faults. These normal faults express themselves on a regional scale; upper crust fractures into tilted fault blocks, and ductile lower crust ascends. This results in uplift, cooling, and exhumation of ductilely deformed deeper crust. The large unit of tilted blocks and associated crust can form an integral part of metamorphic core complexes, which are found on both continental and oceanic crust. (en) 傾動地塊（けいどうちかい、英: tilted block）とは、山地上に形成された断層崖により、山地のが断層崖の反対側に傾いた山地のことである。により形成される。 傾動地塊は、複数本のにより形成された断層変位地形であり、変動地形の一種である。 傾動地塊の前面には急傾斜の断層崖があるが、背面では緩傾斜となっている。 傾動地塊の例として、養老山地が挙げられる。養老山地は、西側が緩傾斜、東側が急傾斜の傾動地塊であり、の活動に起因して形成された。養老断層の活動は約100万年前から活発になり、養老山地の傾動隆起が始まったとされる。 (ja) |
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| rdfs:comment | Tilted block faulting, also called rotational block faulting, is a mode of structural evolution in extensional tectonic events, a result of tectonic plates stretching apart. When the upper lithospheric crust experiences extensional pressures, the brittle crust fractures, creating detachment faults. These normal faults express themselves on a regional scale; upper crust fractures into tilted fault blocks, and ductile lower crust ascends. This results in uplift, cooling, and exhumation of ductilely deformed deeper crust. The large unit of tilted blocks and associated crust can form an integral part of metamorphic core complexes, which are found on both continental and oceanic crust. (en) 傾動地塊（けいどうちかい、英: tilted block）とは、山地上に形成された断層崖により、山地のが断層崖の反対側に傾いた山地のことである。により形成される。 傾動地塊は、複数本のにより形成された断層変位地形であり、変動地形の一種である。 傾動地塊の前面には急傾斜の断層崖があるが、背面では緩傾斜となっている。 傾動地塊の例として、養老山地が挙げられる。養老山地は、西側が緩傾斜、東側が急傾斜の傾動地塊であり、の活動に起因して形成された。養老断層の活動は約100万年前から活発になり、養老山地の傾動隆起が始まったとされる。 (ja) En géologie, on appelle bloc basculé le bloc de croûte continentale situé entre deux failles normales listriques, dans un rift puis une marge passive. La géométrie courbe de la faille (pendage diminuant avec la profondeur) provoque le basculement du bloc et une sédimentation en éventail (sédiments synrift). La pente du milieu de dépôt augmentant avec le temps, on observe dans ces sédiments syn-rift la présence de nombreux slumps. (fr) |
| rdfs:label | Bloc basculé (fr) 傾動地塊 (ja) Tilted block faulting (en) |
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