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Are terrestrial plumes from motionless plates analogues to Martian plumes feeding the giant shield volcanoes?

By
Christine M. Meyzen
Christine M. Meyzen
Dipartimento di Geoscienze, Università degli Studi di Padova, via G. Gradenigo, 6, 35131 Padova, Italy
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Matteo Massironi
Matteo Massironi
Dipartimento di Geoscienze, Università degli Studi di Padova, via G. Gradenigo, 6, 35131 Padova, ItalyINAF, Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 3, 35122 Padova, Italy
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Riccardo Pozzobon
Riccardo Pozzobon
Dipartimento di Geoscienze, Università degli Studi di Padova, via G. Gradenigo, 6, 35131 Padova, ItalyIRSPS-DISPUTer, Universita’ G. d’Annunzio, Via Vestini 31, 66013 Chieti, Italy
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Luca Dal Zilio
Luca Dal Zilio
Dipartimento di Geoscienze, Università degli Studi di Padova, via G. Gradenigo, 6, 35131 Padova, Italy
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Published:
January 01, 2015

Abstract

On Earth, most tectonic plates are regenerated and recycled through convection. However, the Nubian and Antarctic plates could be considered as poorly mobile surfaces of various thicknesses that are acting as conductive lids on top of Earth’s deeper convective system. Here, volcanoes do not show any linear age progression, at least not for the last 30 myr, but constitute the sites of persistent, focused, long-term magmatic activity rather than a chain of volcanoes, as observed in fast-moving plate plume environments. The melt products vertically accrete into huge accumulations. The residual depleted roots left behind by melting processes cannot be dragged away from the melting loci underlying the volcanoes, which may contribute to producing an unusually shallow depth of oceanic swells. The persistence of a stationary thick depleted lid slows down the efficiency of melting processes at shallow depths. Numerous characteristics of these volcanoes located on motionless plates may be shared by those of the giant volcanoes of the Tharsis province, as Mars is a one-plate planet. The aim of this chapter is to undertake a first inventory of these common features, in order to improve our knowledge of the construction processes of Martian volcanoes.

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Contents

Geological Society, London, Special Publications

Volcanism and Tectonism Across the Inner Solar System

T. Platz
T. Platz
Planetary Science Institute, USA
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M. Massironi
M. Massironi
Università degli Studi di Padova, Italy
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P. K. Byrne
P. K. Byrne
Lunar and Planetary Institute, USA
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H. Hiesinger
H. Hiesinger
Westfälische Wilhelms-Universitä Münster, Germany
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Geological Society of London
Volume
401
ISBN electronic:
9781862396777
Publication date:
January 01, 2015

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