Continent-wide drainage reorganization in North America driven by mantle flow

Wang, Huilin; Gurnis, Michael; Skogseid, Jakob

doi:10.1016/j.epsl.2019.115910

Cited by 10 publications

(7 citation statements)

References 40 publications

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“…Only a small number of studies have explored the continental‐scale landscape dynamics necessary for capturing the full source‐to‐sink pathway for a basin system of the scale of the GAB and are largely focused on the erosional component (e.g. Braun et al., 2013; Chang & Liu, 2019; Howard et al., 1994; Ruetenik et al., 2016; Salles et al., 2017; Wang et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

Modelling the role of dynamic topography and eustasy in the evolution of the Great Artesian Basin

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Modelling the role of dynamic topography and eustasy in the evolution of the Great Artesian Basin

et al. 2021

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“…Thus, it is more likely that events outside the MCR region facilitated Neoproterozoic deposition. For example, dynamic topography can change elevations and river drainage patterns (Wang, Gurnis, & Skogseid, 2019). Locally, faulting could have provided topographic lows for deposition.…”

Section: Discussionmentioning

confidence: 99%

Neoproterozoic sedimentation and tectonics of the Laurentian midcontinent: Detrital zircon provenance of the Jacobsville Sandstone, Lake Superior Basin, USA and Canada

et al. 2020

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The Neoproterozoic Jacobsville Sandstone outcrops along the south and east shores of Lake Superior, USA. It records intraplate deformation, some during its deposition and some afterwards, after the c. 1,100 Ma Midcontinent Rift (MCR) failed. Here we analyse 549 new detrital zircon ages from five sites, combined with prior data. Initially, local palaeo‐topography controlled the source material, including the MCR‐adjacent Penokean and Archaean rocks. With time the percentage of distal sources increased, including the c. 1,300–980 Ma Grenville orogeny and 1,480–1,360 Ma Granite‐Rhyolite Province. Sites near the Keweenaw fault contain a significant number of MCR‐age zircons, presumably uplifted to the surface, indicating fault motion during deposition. Only a relatively small percentage of 1,090–980 Ma Grenville‐age zircons from collisions to the east are present, suggesting that they were not efficiently transported to the Lake Superior area. This work is innovative in that it is the first to use detrital zircon geochronology to understand the internal stratigraphy of the Jacobsville Sandstone, whose provenance provides new information about the Neoproterozoic tectonic and sedimentary history of Laurentia.

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“…In some cases, the amount of post-rift subsidence may exceed the possible thermal contribution, in which case anomalous subsidence has been attributed to dynamic processes that reflect changes in mantle flow (e.g., Wang et al, 2017Wang et al, , 2020. Vertical movements in passive margin deltaic depocenters over timescales of 10 6 years and longer are also known to in- clude flexural isostatic response to sediment loading, which produces bending of the lithosphere (Watts et al, 2009).…”

Section: Components Of Vertical Motion In Passive Margin Deltaic Depo...mentioning

confidence: 99%

Flexural isostatic response of continental-scale deltas to climatically driven sea level changes

Polanco,

Blum,

Salles

et al. 2024

Earth Surf. Dynam.

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Abstract. The interplay between climate-forced sea level change, erosional and depositional processes, and flexural isostasy in deep time on passive margin deltas remains poorly understood. We performed a series of conceptual simulations to investigate flexural isostatic responses to high-frequency fluctuations in water and sediment load associated with climatically driven sea level changes. We model a large drainage basin that discharges to a continental margin and produces a large deltaic depocenter, then prescribe synthetic and climatic-driven sea level curves of different frequencies to assess flexural response. Results show that flexural isostatic responses are bidirectional over 100–1000 kyr timescales and are in sync with the magnitude, frequency, and direction of sea level fluctuations and that isostatic adjustments play an important role in driving along-strike and cross-shelf river mouth migration and sediment accumulation. Our findings demonstrate that climate-forced sea level changes produce a feedback mechanism that results in self-sustaining creation of accommodation into which sediment is deposited and plays a major role in delta morphology and stratigraphic architecture.

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Continent-wide drainage reorganization in North America driven by mantle flow

Cited by 10 publications

References 40 publications

Modelling the role of dynamic topography and eustasy in the evolution of the Great Artesian Basin

Modelling the role of dynamic topography and eustasy in the evolution of the Great Artesian Basin

Neoproterozoic sedimentation and tectonics of the Laurentian midcontinent: Detrital zircon provenance of the Jacobsville Sandstone, Lake Superior Basin, USA and Canada

Flexural isostatic response of continental-scale deltas to climatically driven sea level changes

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