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A detachment fault is a gently dipping normal fault associated with large-scale extensional tectonics. [1] Detachment faults often have very large displacements (tens of km) and juxtapose unmetamorphosed hanging walls against medium to high-grade metamorphic footwalls that are called metamorphic core complexes.
Detachment faults are normal faults that have accumulated offsets on par with the thickness of the brittle layer they dissect (∼10 km). Their footwalls, which are not significantly eroded in the submarine environment, consequently experience large amounts of rotation ( Buck, 1988 ; Sandiford et al., 2021 ) and expose lower-crustal and mantle ...
7 de jun. de 2023 · We use 3-D numerical models to investigate the underlying mechanisms for why detachment faults predominantly form on the transform side (inside corner) of a ridge-transform intersection as...
26 de jul. de 2021 · The normal faults that ruptured during the three mainshocks are capped at ∼9 km depth by a sub-horizontal detachment zone. The normal faults intersect the detachment at an acute angle, causing complex fault zone structures and fragmentation of the detachment where they intersect.
- Felix Waldhauser, Maddalena Michele, Lauro Chiaraluce, Raffaele Di Stefano, David P. Schaff
- 10
- 2021
- 26 July 2021
9 de out. de 2008 · Nature - Oceanic detachment faults are associated with one of two contrasting modes of accretion at mid-ocean ridges and can accommodate extension for millions of years. The main mode of...
- Javier E. Escartin, Deborah K. Smith, Johnson R. Cann, Hans A. Schouten, Charles H. Langmuir, Stépha...
- 2008
27 de nov. de 2020 · Here we present constraints on fluid circulation along the 13°20′N oceanic detachment fault along the Mid-Atlantic Ridge. Rocks recovered in situ with a deep-sea robot yield mafic breccias, instead of serpentinized mantle rocks commonly found at other detachments.
28 de mar. de 2021 · Slow seafloor spreading is often taken up by extension on large-offset asymmetric detachment faults (ODFs), which exhume lower crustal and mantle rocks in domal footwall exposures termed oceanic core complexes (OCCs) (e.g., Buck, 1993; Cannat, 1993; Lavier et al., 2000; Tucholke, 1998).
