descriptionPublicationkeyboard_double_arrow_right Article 22 Jul 2021 English Publisher:Oxford University Press (OUP)Journal:Geophysical Journal International, volume 227, pages 1,512-1,522 (issn: 0956-540X, eissn: 1365-246X,

Authors: Sergio Zlotnik; Jeremías Likerman; Jeremías Likerman; Chun-Feng Li;

doi: 10.1093/gji/ggab286

handle: 2117/355118 , 11336/149019

The effects of small-scale convection in the shallow lithosphere of the North Atlantic

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Abstract

SUMMARY Curie point depth can be used as a proxy for plate temperatures. Data from the North Atlantic (10°–50°N) are used here to determine if the observed oscillations and patterns in Curie depths could be a subproduct of small-scale thermal instabilities arising at the bottom of the lithospheric plates. Our numerical models suggest that small-scale convection (SSC) cells could produce thermal perturbations at isotherms as low as the Curie point. These results are compatible with North Atlantic observations in terms of wavelengths (150–300 km), amplitudes (∼4 km) and orientations of the instabilities. Observed Curie-point depth oscillations before the onset (70 to 90 Myr) of SSC could also be linked to other different processes. We suggest that, in the case of the North Atlantic lithosphere, the spreading rate variation and the melt and upwelling could be intricately linked and cause a different pattern of SSC.

Related Organizations

Universitat Polite`cnica de Catalunya
Spain
Universitat Politècnica de Catalunya
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Facultad de Ciencias Agrarias y Forestales
Argentina
Universitat Polit?cnica de Catalunya
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Zhejiang University
China (People's Republic of)

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Keywords

ATLANTIC OCEAN, Magnetic anomalies: modelling and interpretation, DYNAMICS: CONVECTION CURRENTS, AND MANTLE PLUMES, :Matemàtiques i estadística::Matemàtica aplicada a les ciències [Àrees temàtiques de la UPC], convection currents [Dynamics], Numerical analysis--Simulation methods, https://purl.org/becyt/ford/1.5, Mid-ocean ridge processes, :65 Numerical analysis::65C Probabilistic methods, simulation and stochastic differential equations [Classificació AMS], https://purl.org/becyt/ford/1, MANTLE PROCESSES, Atlantic Ocean, Àrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica::Mètodes numèrics, Dynamics: convection currents, Anàlisi numèrica, Classificació AMS::86 Geophysics, NUMERICAL MODELLING, :Matemàtiques i estadística::Anàlisi numèrica::Mètodes numèrics [Àrees temàtiques de la UPC], Mantle processes, simulation and stochastic differential equations, Geofísica, Classificació AMS::65 Numerical analysis::65C Probabilistic methods, simulation and stochastic differential equations, and mantle plumes, MAGNETIC ANOMALIES: MODELLING AND INTERPRETATION, Geophysics, Numerical modelling, Àrees temàtiques de la UPC::Matemàtiques i estadística::Matemàtica aplicada a les ciències, MID-OCEAN RIDGE PROCESSES, Classificació AMS::65 Numerical analysis::65C Probabilistic methods, :86 Geophysics [Classificació AMS], modelling and interpretation [Magnetic anomalies]

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