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A downscaling approach for geological characterization of the Raditladi basin of Mercury

By
Paolo Mancinelli
Paolo Mancinelli
Sezione di Geologia Strutturale e Geofisica, Dipartimento di Scienze della Terra, Università degli Studi di Perugia, Piazza Università 1, 06100 Perugia, Italy
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Francesco Minelli
Francesco Minelli
Sezione di Geologia Strutturale e Geofisica, Dipartimento di Scienze della Terra, Università degli Studi di Perugia, Piazza Università 1, 06100 Perugia, Italy
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Alessandro Mondini
Alessandro Mondini
CNR IRPI Perugia, Strada della Madonna Alta 126, 06128 Perugia, Italy
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Cristina Pauselli
Cristina Pauselli
Sezione di Geologia Strutturale e Geofisica, Dipartimento di Scienze della Terra, Università degli Studi di Perugia, Piazza Università 1, 06100 Perugia, Italy
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Costanzo Federico
Costanzo Federico
Sezione di Geologia Strutturale e Geofisica, Dipartimento di Scienze della Terra, Università degli Studi di Perugia, Piazza Università 1, 06100 Perugia, Italy
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Published:
January 01, 2015

Abstract

In this work, we combined multi-scale geological maps of Mercury to produce a new global map where geological units are classified based on albedo, crater density and morphological relationships with other units. To create this map, we used the 250 m/pixel mosaic of images acquired by the narrow- and wide-angle cameras onboard the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft during its orbital phase. The geological mapping is supported by digital terrain model data and surface mineralogical variation from the global mosaic of MESSENGER Mercury Atmospheric and Surface Composition Spectrometer observations. This map comprises the global-scale intercrater plains, smooth plains and Odin-type units as reported in previous studies, as well as units we term bright intercrater plains, Caloris rough ejecta and dark material deposits. We mapped a portion of the Raditladi quadrangle (19–35°N, 106–133°E) at a regional scale at a resolution of 166 m/pixel. We characterized the geological context of the area and evaluated the stratigraphic relationships between the units. To obtain a representative geological section, we analysed and corrected available topographical data. The geological cross-section derived from our regional mapping suggests that volcanic emplacement of Raditladi’s inner plains followed the topography of the basin after the deposition of impact-related units (i.e. melts, breccias and rim collapse) and was driven by low-viscosity flows. Hollows that appear on Raditladi’s peak ring were possibly formed from low-reflectance intercrater plains materials exposed through the peak ring unit.

Supplementary material:

Cleaner, larger version of the global-scale geological map and a local-scale map for comparison are available at http://www.geolsoc.org.uk/SUP18741.

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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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