2010
DOI: 10.1029/2009jb006943
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Seismic structure of an oceanic core complex at the Mid‐Atlantic Ridge, 22°19′N

Abstract: [1] We present results from a seismic refraction and wide-angle experiment surveying an oceanic core complex on the Mid-Atlantic Ridge at 22°19′N. Oceanic core complexes are settings where petrological sampling found exposed lower crustal and upper mantle rocks, exhumed by asymmetric crustal accretion involving detachment faulting at magmatically starved ridge sections. Tomographic inversion of our seismic data yielded lateral variations of P wave velocity within the upper 3 to 4 km of the lithosphere across t… Show more

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Cited by 36 publications
(61 citation statements)
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References 68 publications
(103 reference statements)
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“…A similar feature was observed in the Southwest Indian Ridge at 50°E (Zhao et al, 2013), the Mid-Atlantic Ridge at 22°19′N (Dannowski et al, 2010) and the Parece Vela back-arc basin , and oceanic detachment faulting was proposed to explain this feature Dannowski et al, 2010;Zhao et al, 2013). In most cases, a high-velocity anomaly, strong crustal thinning and Moho uplifting are observed beneath an oceanic detachment fault, and the crustal thickness ranges from 2.5 to 5.5 km Dannowski et al, 2010;Zhao et al, 2013). The lithospheric structure resulting from an oceanic detachment fault shows lateral variations in velocity, crustal thickness and Moho depth across the spreading centre Escartin et al, 2008;Dannowski et al, 2010;Zhao et al, 2013).…”
Section: Initial Stage Of Oceanic Detachment Faultingsupporting
confidence: 78%
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“…A similar feature was observed in the Southwest Indian Ridge at 50°E (Zhao et al, 2013), the Mid-Atlantic Ridge at 22°19′N (Dannowski et al, 2010) and the Parece Vela back-arc basin , and oceanic detachment faulting was proposed to explain this feature Dannowski et al, 2010;Zhao et al, 2013). In most cases, a high-velocity anomaly, strong crustal thinning and Moho uplifting are observed beneath an oceanic detachment fault, and the crustal thickness ranges from 2.5 to 5.5 km Dannowski et al, 2010;Zhao et al, 2013). The lithospheric structure resulting from an oceanic detachment fault shows lateral variations in velocity, crustal thickness and Moho depth across the spreading centre Escartin et al, 2008;Dannowski et al, 2010;Zhao et al, 2013).…”
Section: Initial Stage Of Oceanic Detachment Faultingsupporting
confidence: 78%
“…The oceanic detachment faults are well established along magma-starved ridges with half-spreading rate of less than 40 mm/year (Canales et al, 2000;Ildefonse et al, 2007;Escartin et al, 2008;Dannowski et al, 2010;Zhao et al, 2013). The oceanic detachment faults are well established along magma-starved ridges with half-spreading rate of less than 40 mm/year (Canales et al, 2000;Ildefonse et al, 2007;Escartin et al, 2008;Dannowski et al, 2010;Zhao et al, 2013).…”
Section: Initial Stage Of Oceanic Detachment Faultingmentioning
confidence: 97%
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“…These rocks are generally assumed to be pieces of the hangingwall carried on top of the moving footwall (e.g., Rehrig and Reynolds, 1980). Similar 'rider' blocks have been recognized in oceanic core complexes by bathymetric and seismic studies (Dannowski et al, 2010;Reston and Ranero, 2011).…”
Section: 'Riders Blocks' and Constraints On Fault Strengthsupporting
confidence: 67%