Stochastic analysis of seafloor morphology on the flank of the Southeast Indian Ridge: The influence of ridge morphology on the formation of abyssal hills

Goff, John A.; Ma, Ying; Shah, Anjana K.; Cochran, James R.; Sempéré, Jean‐Christophe

doi:10.1029/97jb00781

Cited by 74 publications

(137 citation statements)

References 41 publications

(43 reference statements)

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“…The large non-transform or second-order offsets found along intermediate spreading ridges display a wide range of morphological types Goff et al 1997;Sempéré et al 1997;Small et al 1999;Sinton et al 2003;Christie et al 2005). In some cases, overlapping shallow rifts or axial ridges are observed that curve toward each other enclosing an elliptical overlap basin (e.g.…”

Section: Geophysical Properties Of Discontinuities and Ridge Segmentsmentioning

confidence: 99%

“…Small 1998), the most common morphological types are rifted axial highs and shallow rift valleys (Fig. 6, Goff et al 1997;Sempéré et al 1997;Small et al 1999;Sinton et al 2003;Christie et al 2005). Rifted axial highs are characterized by a narrow depression 50-200 m deep at the summit of an axial high that is a few kilometres wide (Fig.…”

Section: Intermediate Spreading Ridgesmentioning

confidence: 99%

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Tectonic and magmatic segmentation of the Global Ocean Ridge System: a synthesis of observations

Carbotte

Smith

Cannat

et al. 2015

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Mid-ocean ridges display tectonic segmentation defined by discontinuities of the axial zone, and geophysical and geochemical observations suggest segmentation of the underlying magmatic plumbing system. Here, observations of tectonic and magmatic segmentation at ridges spreading from fast to ultraslow rates are reviewed in light of influential concepts of ridge segmentation, including the notion of hierarchical segmentation, spreading cells and centralized v. multiple supply of mantle melts. The observations support the concept of quasi-regularly spaced principal magmatic segments, which are 30-50 km long on average at fast-to slow-spreading ridges and fed by melt accumulations in the shallow asthenosphere. Changes in ridge properties approaching or crossing transform faults are often comparable with those observed at smaller offsets, and even very small discontinuities can be major boundaries in ridge properties. Thus, hierarchical segmentation models that suggest large-scale transform fault-bounded segmentation arises from deeper level processes in the asthenosphere than the finer-scale segmentation are not generally supported. The boundaries between some but not all principal magmatic segments defined by ridge axis geophysical properties coincide with geochemical boundaries reflecting changes in source composition or melting processes. Where geochemical boundaries occur, they can coincide with discontinuities of a wide range of scales.Discovery and interpretations of mid-ocean ridge (MOR) segmentation: historical review

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Section: Geophysical Properties Of Discontinuities and Ridge Segmentsmentioning

confidence: 99%

Section: Intermediate Spreading Ridgesmentioning

confidence: 99%

Tectonic and magmatic segmentation of the Global Ocean Ridge System: a synthesis of observations

Carbotte

Smith

Cannat

et al. 2015

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“…To first order, the relative importance of tectonic extension by faulting in seafloor spreading appears to increase with decreasing spreading rate (Edwards et al, 1991, carbotte andMacdonald, 1994;Goff et al, 1997). Furthermore, the style of tectonic faulting also vares with spreading rate.…”

Section: Introductionmentioning

confidence: 99%

The evolution of lithospheric deformation and crustal structure from continental margins to oceanic spreading centers

Behn¹

2002

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“…By examining the shape and orientation of abyssal hills over these regions, it is possible to make spreading rate and direction estimates for use in tectonic reconstructions; however, other factors can also affect abyssal-hill shape and trend [Goff et al, 1997].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore several measures of abyssal-hill shape correlate with spreading rate and direction. These measures include abyssal-hill width, asymmetry (measured as a difference in slope between the sides facing toward and away from the spreading center) and root-mean-square (RMS) amplitude [Goff, 1991;Goff et al, 1997;Hayes and Kane, 1991;Kriner et al, 2006]. Abyssal-hill trend (the azimuth of the hill's long axis) and the distribution in azimuths of the slopes facing toward and away from the spreading axis are useful indicators of paleo-spreading direction [Goff and Jordan, 1988;Kriner et al, 2006].…”

Section: Introductionmentioning

confidence: 99%

A ridgelet transform method for constraining tectonic models via abyssal‐hill morphology

Downey

Clayton

2007

Geochem Geophys Geosyst

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[1] Abyssal-hill shape and orientation are related to the direction and spreading rate of paleo-spreading centers. Therefore analyzing abyssal-hill shape and trend is useful for constraining tectonic models of regions devoid of magnetic reversal anomalies. Detecting systematic changes of abyssal-hill shapes or trends, due to changes in spreading rate or direction, is not straightforward, which makes it difficult to determine appropriate regions over which to average abyssal-hill parameters. Often, however, detecting these systematic changes, where they occur, and the scale over which they occur, is of primary importance for tectonic reconstructions. We present a new method of abyssal-hill analysis that is based on the ridgelet transform, a relative of the two-dimensional wavelet transform. Our method is capable of locally estimating the width, azimuth, and root-mean-square (RMS) amplitude of abyssal-hill fabric and highlights changes in these parameters across a survey area, making it possible to identify regions created with a constant spreading rate and direction. We use three multibeam swaths, one crossing the Osbourn Trough in the southwest Pacific Basin, one crossing the East Pacific Rise, and one crossing the Mid-Atlantic Ridge, to demonstrate the utility and performance of our method.

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Stochastic analysis of seafloor morphology on the flank of the Southeast Indian Ridge: The influence of ridge morphology on the formation of abyssal hills

Abstract: Rise. We find that abyssal hills generated along axial high mid-ocean ridges are very different from those generated along axial valley mid-ocean ridges, not only with respect to size and shape, but also in their response to such factors as spreading rate and segmentation.

Cited by 74 publications

References 41 publications

Tectonic and magmatic segmentation of the Global Ocean Ridge System: a synthesis of observations

Tectonic and magmatic segmentation of the Global Ocean Ridge System: a synthesis of observations

The evolution of lithospheric deformation and crustal structure from continental margins to oceanic spreading centers

A ridgelet transform method for constraining tectonic models via abyssal‐hill morphology

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