9129767 QJ48QBMD 1 apa 50 date desc year Stegman 18 https://dstegman.scrippsprofiles.ucsd.edu/wp-content/plugins/zotpress/
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th%20element%20concentrations%20compared%20with%20ocean%20island%20basalts%20%28OIBs%29.%20Previous%20researchers%20have%20focused%20on%20long-term%20%28billion-year%20timescale%29%20preservation%20of%20an%20enriched%20and%20heterogeneous%20OIB%20reservoir%20within%20the%20convecting%20mantle.%20Such%20studies%20commonly%20conclude%20that%20the%20OIB%20reservoir%20must%20exist%20in%20an%20area%20which%20remains%20isolated%20from%20convection%2C%20i.e.%2C%20D%5C%22.%20Here%20we%20investigate%20the%20maintenance%20of%20MORB%20reservoir%20homogeneity%20over%20shorter%20timescales%20in%20the%20face%20of%20vigorous%20upper%5C%2Flower%20mantle%20mass%20exchange%20%28deep%20subduction%29%2C%20which%20may%20be%20due%20to%20two%20effects%3A%20%281%29%20a%20high-viscosity%20lower%20mantle%20and%5C%2For%20%282%29%20chaotic%20mixing%20due%20to%20toroidal%20flow%20generated%20by%20surface%20plate%20motions.%20We%20explore%20this%20conceptual%20model%20using%20three-dimensional%20spherical%20numerical%20models%20that%20include%20surface%20plate%20motions%2C%20radial%20viscosity%20variation%2C%20and%20a%20geophysically%20plausible%20model%20of%20mantle%20density%20contrasts.%20A%20correlation%20dimension%20method%20is%20used%20to%20characterize%20mixing%20of%20passive%20tracers.%20For%20a%20uniform%20viscosity%20mantle%20the%20upper%20and%20lower%20mantles%20mix%20on%20essentially%20the%20same%20timescales.%20A%20factor%20of%20100%20viscosity%20contrast%20results%20in%20a%20relative%20mixing%20time%20for%20the%20lower%20mantle%20only%2030-60%25%20longer%20than%20that%20of%20the%20upper%20mantle.%20Therefore%20neither%20a%20strong%20viscosity%20contrast%20nor%20toroidal%20mixing%20significantly%20affects%20the%20relative%20mixing%20times%20of%20the%20upper%20and%20lower%20mantle.%20We%20conclude%20that%20return%20flow%20from%20the%20lower%20mantle%20is%20of%20similar%20%28depleted%29%20composition%20and%20that%20the%20depleted%20MORB%20source%20reservoir%20constitutes%20most%20of%20the%20mantle%2C%20except%20for%20a%20convectively%20isolated%20OIB%20source%20region%20at%20the%20base%20of%20the%20mantle.%22%2C%22date%22%3A%22Jun%202002%22%2C%22language%22%3A%22English%22%2C%22DOI%22%3A%2210.1029%5C%2F2001jb000192%22%2C%22ISSN%22%3A%220148-0227%22%2C%22url%22%3A%22%22%2C%22collections%22%3A%5B%22QJ48QBMD%22%5D%2C%22dateModified%22%3A%222022-10-11T18%3A31%3A26Z%22%7D%7D%5D%7D
Peng, D., & Stegman, D. R. (2024). Geodynamic Evolution of the Lau Basin. Geophysical Research Letters, 51(15), e2024GL110127. https://doi.org/10.1029/2024GL110127
Peng, D., & Stegman, D. R. (2024). Modeling Subduction With Extremely Fast Trench Retreat. Journal of Geophysical Research: Solid Earth, 129(9), e2024JB029240. https://doi.org/10.1029/2024JB029240
Capitanio, F. A., Kerr, M., Stegman, D. R., & Smrekar, S. E. (2024). Ishtar Terra highlands on Venus raised by craton-like formation mechanisms. Nature Geoscience, 17(8), 740–746. https://doi.org/10.1038/s41561-024-01485-3
C. Kerr, M., R. Stegman, D., & Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, USA. (2024). Mantle avalanches in a Venus-like stagnant lid planet. Earth and Planetary Physics, 8(5), 686–702. https://doi.org/10.26464/epp2024062
Adams, A. C., Stegman, D. R., Mohammadzadeh, H., Smrekar, S. E., & Tackley, P. J. (2023). Plume‐Induced Delamination Initiated at Rift Zones on Venus. Journal of Geophysical Research: Planets, 128(10), e2023JE007879. https://doi.org/10.1029/2023JE007879
Adams, A. C., Stegman, D. R., Smrekar, S. E., & Tackley, P. J. (2022). Regional-Scale Lithospheric Recycling on Venus Via Peel-Back Delamination. Journal of Geophysical Research-Planets, 127(10), 23. https://doi.org/10.1029/2022je007460
Pusok, A. E., Stegman, D. R., & Kerr, M. (2022). The effect of low-viscosity sediments on the dynamics and accretionary style of subduction margins. Solid Earth, 13(9), 1455–1473. https://doi.org/10.5194/se-13-1455-2022
Sim, S. J., Spiegelman, M., Stegman, D. R., & Wilson, C. (2020). The influence of spreading rate and permeability on melt focusing beneath mid-ocean ridges. Physics of the Earth and Planetary Interiors, 304. https://doi.org/10.1016/j.pepi.2020.106486
Pusok, A. E., & Stegman, D. R. (2020). The convergence history of India-Eurasia records multiple subduction dynamics processes. Science Advances, 6(19). https://doi.org/10.1126/sciadv.aaz8681
Blanc, N. A., Stegman, D. R., & Ziegler, L. B. (2020). Thermal and magnetic evolution of a crystallizing basal magma ocean in Earth’s mantle. Earth and Planetary Science Letters, 534. https://doi.org/10.1016/j.epsl.2020.116085
Zhou, Q., Hu, J. S., Liu, L. J., Chaparro, T., Stegman, D. R., & Faccenda, M. (2018). Western US seismic anisotropy revealing complex mantle dynamics. Earth and Planetary Science Letters, 500, 156–167. https://doi.org/10.1016/j.epsl.2018.08.015
Sim, S. J., Stegman, D. R., & Coltice, N. (2016). Influence of continental growth on mid-ocean ridge depth. Geochemistry Geophysics Geosystems, 17(11), 4425–4437. https://doi.org/10.1002/2016gc006629
Petersen, R. I., Stegman, D. R., & Tackley, P. J. (2015). A regime diagram of mobile lid convection with plate-like behavior. Physics of the Earth and Planetary Interiors, 241, 65–76. https://doi.org/10.1016/j.pepi.2015.01.002
Druken, K. A., Kincaid, C., Griffiths, R. W., Stegman, D. R., & Hart, S. R. (2014). Plume-slab interaction: The Samoa-Tonga system. Physics of the Earth and Planetary Interiors, 232, 1–14. https://doi.org/10.1016/j.pepi.2014.03.003
Davies, C. J., Stegman, D. R., & Dumberry, M. (2014). The strength of gravitational core-mantle coupling. Geophysical Research Letters, 41(11), 3786–3792. https://doi.org/10.1002/2014gl059836
Jackson, C. R. M., Ziegler, L. B., Zhang, H. L., Jackson, M. G., & Stegman, D. R. (2014). A geochemical evaluation of potential magma ocean dynamics using a parameterized model for perovskite crystallization. Earth and Planetary Science Letters, 392, 154–165. https://doi.org/10.1016/j.epsl.2014.01.028
Ziegler, L. B., & Stegman, D. R. (2013). Implications of a long-lived basal magma ocean in generating Earth’s ancient magnetic field. Geochemistry Geophysics Geosystems, 14(11), 4735–4742. https://doi.org/10.1002/2013gc005001
Kincaid, C., Druken, K. A., Griffiths, R. W., & Stegman, D. R. (2013). Bifurcation of the Yellowstone plume driven by subduction-induced mantle flow. Nature Geoscience, 6(5), 395–399. https://doi.org/10.1038/ngeo1774
Liu, L. J., & Stegman, D. R. (2012). Origin of Columbia River flood basalt controlled by propagating rupture of the Farallon slab. Nature, 482(7385), 386-U1508. https://doi.org/10.1038/nature10749
Capitanio, F. A., Faccenna, C., Zlotnik, S., & Stegman, D. R. (2011). Subduction dynamics and the origin of Andean orogeny and the Bolivian orocline. Nature, 480(7375), 83–86. https://doi.org/10.1038/nature10596
Liu, L. J., & Stegman, D. R. (2011). Segmentation of the Farallon slab. Earth and Planetary Science Letters, 311(1–2), 1–10. https://doi.org/10.1016/j.epsl.2011.09.027
Schellart, W. P., Stegman, D. R., Farrington, R. J., & Moresi, L. (2011). Influence of lateral slab edge distance on plate velocity, trench velocity, and subduction partitioning. Journal of Geophysical Research-Solid Earth, 116. https://doi.org/10.1029/2011jb008535
Cande, S. C., & Stegman, D. R. (2011). Indian and African plate motions driven by the push force of the Reunion plume head. Nature, 475(7354), 47–52. https://doi.org/10.1038/nature10174
Yanagisawa, T., Yamagishi, Y., Hamano, Y., & Stegman, D. R. (2010). Mechanism for generating stagnant slabs in 3-D spherical mantle convection models at Earth-like conditions. Physics of the Earth and Planetary Interiors, 183(1–2), 341–352. https://doi.org/10.1016/j.pepi.2010.02.005
Schellart, W. P., Stegman, D. R., Farrington, R. J., Freeman, J., & Moresi, L. (2010). Cenozoic Tectonics of Western North America Controlled by Evolving Width of Farallon Slab. Science, 329(5989), 316–319. https://doi.org/10.1126/science.1190366
Capitanio, F. A., Stegman, D. R., Moresi, L. N., & Sharples, W. (2010). Upper plate controls on deep subduction, trench migrations and deformations at convergent margins. Tectonophysics, 483(1–2), 80–92. https://doi.org/10.1016/j.tecto.2009.08.020
Stegman, D. R., Farrington, R., Capitanio, F. A., & Schellart, W. P. (2010). A regime diagram for subduction styles from 3-D numerical models of free subduction. Tectonophysics, 483(1–2), 29–45. https://doi.org/10.1016/j.tecto.2009.08.041
Farrington, R. J., Stegman, D. R., Moresi, L. N., Sandiford, M., & May, D. A. (2010). Interactions of 3D mantle flow and continental lithosphere near passive margins. Tectonophysics, 483(1–2), 20–28. https://doi.org/10.1016/j.tecto.2009.10.008
Stegman, D. R., Schellart, W. P., & Freeman, J. (2010). Competing influences of plate width and far-field boundary conditions on trench migration and morphology of subducted slabs in the upper mantle. Tectonophysics, 483(1–2), 46–57. https://doi.org/10.1016/j.tecto.2009.08.026
Stegman, D. R., Freeman, J., & May, D. A. (2009). Origin of ice diapirism, true polar wander, subsurface ocean, and tiger stripes of Enceladus driven by compositional convection. Icarus, 202(2), 669–680. https://doi.org/10.1016/j.icarus.2009.03.017
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OzBench, M., Regenauer-Lieb, K., Stegman, D. R., Morra, G., Farrington, R., Hale, A., May, D. A., Freeman, J., Bourgouin, L., Muhlhaus, H., & Moresi, L. (2008). A model comparison study of large-scale mantle-lithosphere dynamics driven by subduction. Physics of the Earth and Planetary Interiors, 171(1–4), 224–234. https://doi.org/10.1016/j.pepi.2008.08.011
Clark, S. R., Stegman, D., & Muller, R. D. (2008). Episodicity in back-arc tectonic regimes. Physics of the Earth and Planetary Interiors, 171(1–4), 265–279. https://doi.org/10.1016/j.pepi.2008.04.012
Goyette, S., Takatsuka, M., Clark, S., Müller, R. D., Rey, P., & Stegman, D. (2008). Increasing the usability and accessibility of geodynamic modelling tools to the geoscience community: UnderworldGUI. Visual Geosciences, 13(1), 25–36. https://doi.org/10.1007/s10069-007-0006-3
Stegman, D., Moresi, L., Turnbull, R., Giordani, J., Sunter, P., Lo, A., & Quenette, S. (2008). gLucifer: next generation visualization framework for high-performance computational geodynamics. Visual Geosciences, 13(1), 71–84. https://doi.org/10.1007/s10069-008-0010-2
Schellart, W. P., Stegman, D. R., & Freeman, J. (2008). Global trench migration velocities and slab migration induced upper mantle volume fluxes: Constraints to find an Earth reference frame based on minimizing viscous dissipation. Earth-Science Reviews, 88(1–2), 118–144. https://doi.org/10.1016/j.earscirev.2008.01.005
Schellart, W. P., Freeman, J., Stegman, D. R., Moresi, L., & May, D. (2007). Evolution and diversity of subduction zones controlled by slab width. Nature, 446(7133), 308–311. https://doi.org/10.1038/nature05615
Gottschaldt, K. D., Walzer, U., Hendel, R. F., Stegman, D. R., Baumgardner, J. R., & Mulhausy, H. B. (2006). Stirring in 3-d spherical models of convection in the Earth’s mantle. Philosophical Magazine, 86(21–22), 3175–3204. https://doi.org/10.1080/14786430500197991
Stegman, D. R., Freeman, J., Schellart, W. P., Moresi, L., & May, D. (2006). Influence of trench width on subduction hinge retreat rates in 3-D models of slab rollback. Geochemistry Geophysics Geosystems, 7. https://doi.org/10.1029/2005gc001056
Reese, C. C., Solomatov, V. S., Baumgardner, J. R., Stegman, D. R., & Vezolainen, A. V. (2004). Magmatic evolution of impact-induced Martian mantle plumes and the origin of Tharsis. Journal of Geophysical Research-Planets, 109(E8). https://doi.org/10.1029/2003je002222
Stegman, D. R., Jellinek, A. M., Zatman, S. A., Baumgardner, J. R., & Richards, M. A. (2003). An early lunar core dynamo driven by thermochemical mantle convection. Nature, 421(6919), 143–146. https://doi.org/10.1038/nature01267
Stegman, D. R., Richards, M. A., & Baumgardner, J. R. (2002). Effects of depth-dependent viscosity and plate motions on maintaining a relatively uniform mid-ocean ridge basalt reservoir in whole mantle flow. Journal of Geophysical Research-Solid Earth, 107(B6). https://doi.org/10.1029/2001jb000192