Influence of subduction history on South American topography

Flament, Nicolas; Gurnis, Michael; Müller, R. Dietmar; Bower, Dan J.; Husson, Laurent

doi:10.1016/j.epsl.2015.08.006

Cited by 77 publications

(76 citation statements)

References 46 publications

(109 reference statements)

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“…Flament et al . [] also predict an eastward‐migrating wave of dynamic uplift between 65°W and 70°W from 20 to 0 Ma. They suggest that this uplift could account for a component of Late Miocene uplift of the Altiplano region.…”

Section: Discussionsupporting

confidence: 93%

“…Flament et al . [] use a time‐dependent global model to predict the evolution of post‐Miocene topography. They argue that evolution of the Amazon catchment may be affected by large‐scale mantle flow.…”

Section: Discussionmentioning

confidence: 99%

“…A significant limitation of the dynamic topographic model proposed by Flament et al . [] and other predictive studies is the specific exclusion of contributions to surface dynamic topography made by buoyancy variations at depths shallower than

\sim 350

km. Consequently, these predictive models do not have short (

\sim 1000

km) wavelength dynamic components.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Spatial and temporal uplift history of South America from calibrated drainage analysis

Tribaldos

White

Hoggard

2017

Geochem Geophys Geosyst

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A multidisciplinary approach is used to analyze the Cenozoic uplift history of South America. Residual depth anomalies of oceanic crust abutting this continent help to determine the pattern of present‐day dynamic topography. Admittance analysis and crustal thickness measurements indicate that the elastic thickness of the Borborema and Altiplano regions is ≤10 km with evidence for sub‐plate support at longer wavelengths. A drainage inventory of 1827 river profiles is assembled and used to investigate landscape development. Linear inverse modeling enables river profiles to be fitted as a function of the spatial and temporal history of regional uplift. Erosional parameters are calibrated using observations from the Borborema Plateau and tested against continent‐wide stratigraphic and thermochronologic constraints. Our results predict that two phases of regional uplift of the Altiplano plateau occurred in Neogene times. Regional uplift of the southern Patagonian Andes also appears to have occurred in Early Miocene times. The consistency between observed and predicted histories for the Borborema, Altiplano, and Patagonian plateaux implies that drainage networks record coherent signals that are amenable to simple modeling strategies. Finally, the predicted pattern of incision across the Amazon catchment constrains solid sedimentary flux at the Foz do Amazonas. Observed and calculated flux estimates match, suggesting that erosion and deposition were triggered by regional Andean uplift during Miocene times.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

\sim 350

km. Consequently, these predictive models do not have short (

\sim 1000

km) wavelength dynamic components.…”

Section: Discussionmentioning

confidence: 99%

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Spatial and temporal uplift history of South America from calibrated drainage analysis

Tribaldos

White

Hoggard

2017

Geochem Geophys Geosyst

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“…These models estimate that transient dynamic topography has amplitudes of up to ±2 km and wavelengths of hundreds to thousands of kilometers (see, e.g., Flament et al., ). They have been used to account for the aerial extent of the Western Interior Seaway as well as for Mesozoic‐Cenozoic uplift, subsidence and magmatic patterns (e.g., Flament et al., ; Heller & Liu, ; Liu, ; Rowley et al., ). There is considerable debate about how best to parametrize and test these models, and it is notable that most of them fail to match the power spectral characteristics of a global database of oceanic residual depth measurements (Hoggard et al., ).…”

Section: Introductionmentioning

confidence: 99%

Continental‐Scale Landscape Evolution: A History of North American Topography

2019

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The generation and evolution of continental topography are fundamental geologic and geomorphic concerns. In particular, the history of landscape development might contain useful information about the spatiotemporal evolution of deep Earth processes, such as mantle convection. A significant challenge is to generate observations and theoretical predictions of sufficient fidelity to enable landscape evolution to be constrained at scales of interest. Here, we combine substantial inventories of stratigraphic and geomorphic observations with inverse and forward modeling approaches to determine how the North American landscape evolved. First, stratigraphic markers are used to estimate postdepositional regional uplift. Present‐day elevations of these deposits demonstrate that >2 km of long‐wavelength surface uplift centered on the Colorado‐Rocky‐Mountain plateaus occurred in Cenozoic times. Second, to bridge the gaps between these measurements, an inverse modeling scheme is used to calculate the smoothest spatiotemporal pattern of rock uplift rate that yields the smallest misfit between 4,161 observed and calculated longitudinal river profiles. Our results suggest that Cenozoic regional uplift occurred in a series of stages, in agreement with independent stratigraphic observations. Finally, a landscape evolution model driven by this calculated rock uplift history is used to determine drainage patterns, denudation, and sedimentary flux from Late Cretaceous times until the present day. These patterns are broadly consistent with stratigraphic and thermochronologic observations. We conclude that a calibrated inverse modeling strategy can be used to reliably extract the temporal and spatial evolution of the North American landscape at geodynamically useful scales.

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“…Despite the different methods used, these studies attribute large-scale topography anomalies (wavelengths longer than 10 4 km) to whole-mantle convection (Hager & Richards, 1989;Ricard et al, 1993). Large-scale dynamic topography in such settings is predicted to evolve at rates between less than 1 and 80 m/Myr (e.g., Flament et al, 2015). Large-scale dynamic topography in such settings is predicted to evolve at rates between less than 1 and 80 m/Myr (e.g., Flament et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

On the Scales of Dynamic Topography in Whole‐Mantle Convection Models

Arnould

Coltice

Flament

et al. 2018

Geochem Geophys Geosyst

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Mantle convection shapes Earth's surface by generating dynamic topography. Observational constraints and regional convection models suggest that surface topography could be sensitive to mantle flow for wavelengths as short as 1,000 and 250 km, respectively. At these spatial scales, surface processes including sedimentation and relative sea‐level change occur on million‐year timescales. However, time‐dependent global mantle flow models do not predict small‐scale dynamic topography yet. Here we present 2‐D spherical annulus numerical models of mantle convection with large radial and lateral viscosity contrasts. We first identify the range of Rayleigh number, internal heat production rate and yield stress for which models generate plate‐like behavior, surface heat flow, surface velocities, and topography distribution comparable to Earth's. These models produce both whole‐mantle convection and small‐scale convection in the upper mantle, which results in small‐scale (<500 km) to large‐scale (>104 km) dynamic topography, with a spectral power for intermediate scales (500 to 104 km) comparable to estimates of present‐day residual topography. Timescales of convection and the associated dynamic topography vary from five to several hundreds of millions of years. For a Rayleigh number of 107, we investigate how lithosphere yield stress variations (10–50 MPa) and the presence of deep thermochemical heterogeneities favor small‐scale (200–500 km) and intermediate‐scale (500–104 km) dynamic topography by controlling the formation of small‐scale convection and the number and distribution of subduction zones, respectively. The interplay between mantle convection and lithosphere dynamics generates a complex spatial and temporal pattern of dynamic topography consistent with constraints for Earth.

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Influence of subduction history on South American topography

Cited by 77 publications

References 46 publications

Spatial and temporal uplift history of South America from calibrated drainage analysis

Spatial and temporal uplift history of South America from calibrated drainage analysis

Continental‐Scale Landscape Evolution: A History of North American Topography

On the Scales of Dynamic Topography in Whole‐Mantle Convection Models

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