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http://hdl.handle.net/2122/16581
Authors: | Gennaro, Emanuela* Iezzi, Gianluca* Cocchi, Luca* Ventura, Guido* |
Title: | Large silicic magma chambers at the Moho depth characterize the multi-level plumbing system of back-arc spreading ridges | Journal: | Lithos | Series/Report no.: | /456-457 (2023) | Publisher: | Elsevier | Issue Date: | Nov-2023 | DOI: | 10.1016/j.lithos.2023.107325 | Abstract: | The plumbing system of volcanoes in crustal convergent settings consists of vertically superimposed, sill-like reservoirs. The shallower reservoirs are generally filled by less dense and SiO2-richer magmas. The plumbing systems of spreading ridges are supposed to be simpler and characterized by prevailing sub-parallel vertical dykes. Here, we present the results of thermo-barometric determinations from minerals and modelling of potential field data at the Marsili spreading ridge in the Southern Tyrrhenian Sea back-arc oceanic basin. The Marsili plumbing system consists of sill-like, large SiO2-rich magma reservoirs located at the Moho depth and sub-vertical basaltic dykes crossing the whole oceanic crust. The formation of deep-seated silicic reservoirs is associated with a decrease in the back-arc spreading rate. The geometry of the plumbing system of spreading ridges may be not dissimilar from that of volcanoes at convergent margins. |
Appears in Collections: | Article published / in press |
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File | Description | Size | Format | |
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1-s2.0-S0024493723003092-main_lithos_2023.pdf | Open Access published article | 7.65 MB | Adobe PDF | View/Open |
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