Journal ArticleDOI
Dynamic buckling of subducting slabs reconciles geological and geophysical observations
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In this article, a series of 2D numerical dynamic/kinematic subduction experiments by varying the viscosity increase across the 660 km discontinuity and the strength of the subducting slab was conducted.About:
This article is published in Earth and Planetary Science Letters.The article was published on 2011-12-15. It has received 85 citations till now. The article focuses on the topics: Slab suction & Slab.read more
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Subduction-transition zone interaction: A review
TL;DR: A review of observational constraints and dynamic models highlights that neither the increase in viscosity between upper and lower mantle (likely by a factor 20-50) nor the coincident endothermic phase transition in the main mantle silicates (with a likely Clapeyron slope of -1 to -2 MPa/K) suffice to stagnate slabs as mentioned in this paper.
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Interaction of subducted slabs with the mantle transition-zone: A regime diagram from 2-D thermo-mechanical models with a mobile trench and an overriding plate
TL;DR: In this paper, the effect of initial subducting-and overriding-plate ages on slab transition-zone interaction was investigated using 2D thermo-mechanical models with a mobile trench, an overriding plate, a temperature and stress-dependent rheology, and a 10, 30 or 100fold increase in lower mantle viscosity.
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Compositional mantle layering revealed by slab stagnation at ~1000-km depth.
TL;DR: This study reconciles cosmochemical and geophysical constraints using the stagnation of some slab segments at ~1000-km depth as the key observation and shows that lower-mantle enrichment in intrinsically dense basaltic lithologies can render slabs neutrally buoyant in the uppermost lower mantle.
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Effects of mantle and subduction-interface rheologies on slab stagnation and trench rollback
Hana Čížková,Craig R. Bina +1 more
TL;DR: In this article, the effects of rheological description (yield stress, lower-mantle viscosity, viscosities of crust) in controlling the rollback and associated stagnation of slabs in the transition zone (410-660 km depth) were investigated.
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Why cold slabs stagnate in the transition zone
TL;DR: In this article, the authors present high-resolution numerical simulations showing that when slow diffusion inhibits the dissolution of pyroxene into garnet, the slab becomes buoyant relative to the ambient mantle and stagnates, whereas when the phase transformations occur in equilibrium, there is no effect on the slab.
References
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Free software helps map and display data
Paul Wessel,Walter H. F. Smith +1 more
TL;DR: The Generic Mapping Tools (GMT) is introduced, which is a free, public domain software package that can be used to manipulate columns of tabular data, time series, and gridded data sets and to display these data in a variety of forms ranging from simple x-y plots to maps and color, perspective, and shaded-relief illustrations.
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A model for the global variation in oceanic depth and heat flow with lithospheric age
Carol A. Stein,Seth Stein +1 more
TL;DR: In this paper, the authors proposed a joint fitting of heat flow and bathymetry with a model with a hotter, thinner oceanic lithosphere than in previous models, including those from older lithosphere previously treated as anomalous.
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Relations among subduction parameters
TL;DR: In this article, a multivariate analysis is applied to this data set to isolate causal relationships among these parameters, which yields empirical quantitative relations that predict strain regime and strike-slip faulting in the overriding plate.
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Latest pulse of Earth: Evidence for a mid-Cretaceous superplume
TL;DR: For the past 150 m.y. as mentioned in this paper, a 50% to 75% increase in ocean crust formation rate between 120 and 80 Ma was seen both in spreading-rate increases from ocean ridges and in the age distribution of oceanic plateaus.
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Subducted slabs and the geoid: Constraints on mantle rheology and flow
TL;DR: In this article, the authors show that the observed long-wavelength geoid is highly correlated with that predicted by a density model for seismically active subducted slabs and explain the amplitude of the correlation if the density contrasts associated with subduction extend into the lower mantle or if subducts exceeding 350 km in thickness are piled up over horizontal distances of thousands of km at the base of the upper mantle.
Related Papers (5)
Subducted slabs stagnant above, penetrating through, and trapped below the 660 km discontinuity
Yoshio Fukao,Masayuki Obayashi +1 more