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Crustal Thickness on the Mid-Atlantic Ridge: Bull's-Eye Gravity Anomalies and Focused Accretion
Abstract
Spreading segments of the Mid-Atlantic Ridge show negative bull's-eye anomalies in the mantle Bouguer gravity field. Seismic refraction results from 33°S indicate that these anomalies can be accounted for by variations in crustal thickness along a segment. The crust is thicker in the center and thinner at the end of the spreading segment, and these changes are attributable to variations in the thickness of layer 3. The results show that accretion is focused at a slow-spreading ridge, that axial valley depth reflects the thickness of the underlying crust, and that along-axis density variations should be considered in the interpretation of gravity data.
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Citations
Cited by
Tucholke, B. E., Lin, J., & Kleinrock, M. C. (1998) · Journal of Geophysical Research: Solid Earth · doi:10.1029/98jb00167 · Cited by 572
Long‐term volumetric eruption rates and magma budgets
White, S. M., Crisp, J. A., & Spera, F. J. (2006) · Geochemistry, Geophysics, Geosystems · doi:10.1029/2005gc001002 · Cited by 461
Continental and oceanic core complexes
Whitney, D. L., Teyssier, C., Rey, P., & Buck, W. R. (2013) · Geological Society of America Bulletin · doi:10.1130/b30754.1 · Cited by 379
Magmatism at Mid-Ocean Ridges: Constraints from Volcanological and Geochemical Investigations
Perfit, M. R., & Chadwick, W. W. (2013) · Geophysical Monograph Series · doi:10.1029/gm106p0059 · Cited by 283
Buck, W. R., Einarsson, P., & Brandsdóttir, B. (2006) · Journal of Geophysical Research: Solid Earth · doi:10.1029/2005jb003879 · Cited by 255
Metadata
- Authors
- Tolstoy, M., Harding, A. J., & Orcutt, J. A.
- Venue
- Science
- Published
- 1993-10-29
- Volume
- 262
- Issue
- 5134
- Pages
- 726-729
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2068473785
- Cited by
- 270
- References
- 0
- FWCI
- 25.94
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Crustal Thickness on the Mid-Atlantic Ridge: Bull's-Eye Gravity Anomalies and Focused Accretion. https://app.cochat.ai/papers/10.1126/science.262.5134.726
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- Tolstoy, M., Harding, A. J., & Orcutt, J. A. (1993). Crustal Thickness on the Mid-Atlantic Ridge: Bull's-Eye Gravity Anomalies and Focused Accretion. Science. https://doi.org/10.1126/science.262.5134.726
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
