Flexural uplift and magmatic underplating anomaly on the Argentine continental margin: profile at 43.5°S

Marchi, Ana Carolina Pedraza De; Ghidella, Marta E.; Tocho, Cláudia; Franzese, Juan Rafael

doi:10.1007/s11001-021-09437-x

Cited by 2 publications

(1 citation statement)

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“…Magma might originate from the rise of a mantle plume underneath or decompression-induced melting from passive rifting (e.g., Acocella, 2021). Melt ponding in subhorizontal fractures in the elastic lithosphere (underplating) has been documented in other regions to explain long-term uplift rates and surface deformation (Pedraza De Marchi et al, 2021;Thybo & Artemieva, 2013). Active magmatic underplating has been hypothesized for the region beneath the Eger rift and Cheb basin (Hrubcová et al, 2017), and for the Limagne graben (Michon & Merle, 2001), which are thought to have a common rift formation mechanism to the EVF.…”

Section: Discussionmentioning

confidence: 99%

Lithospheric Sill Intrusions and Present‐Day Ground Deformation at Rhenish Massif, Central Europe

Silverii,

Mantiloni,

Rivalta

et al. 2023

Geophysical Research Letters

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The Rhenish Massif in Central Europe, which includes the Eifel Volcanic Fields, has shown ongoing ground deformation and signs of possible unrest. A buoyant plume exerting uplift forces at the bottom of the lithosphere was proposed to explain such deformation; the hypothesis of (possibly concurrent) melt accumulation in the crust/lithospheric mantle has not been explored yet. Here, we test deformation models in an elastic half‐space considering sources of varying aspect ratio, size and depth. We explore the effects of data coverage, noise and uncertainty on the inferred source parameters. We find that the observed deformation would require melt accumulation in sub‐horizontal sill‐like structures expanding at the rate of up to ∼0.045 km3/yr. We discuss feasibility, limitations and possible interpretations of our resulting models and elaborate on further observations which may help constrain the structure of the Rhenish Massif magmatic system.

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