Geology of Ceres’ North Pole quadrangle with Dawn FC imaging data

Ruesch, O.; McFadden, L. A.; Williams, D. A.; Hughson, K.; Pasckert, J. H.; Scully, J. E. C.; Kneissl, T.; Naß, Andrea; Preusker, Frank; Schmedemann, N.; Marchi, S.; Hiesinger, H.; Jaumann, R.; Nathues, A.; Raymond, C. A.; Russell, C. T.

doi:10.1016/j.icarus.2017.09.036

Cited by 8 publications

(4 citation statements)

References 42 publications

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“…These flow rates are sufficiently fast to subdue ice‐rich cryovolcanic domes older than hundreds of million years (and perhaps tens of million years, depending on ice content) while not yet heavily affecting the geologically young Ahuna Mons. This result applies to hypothetical cryovolcanic domes at the low latitudes and midlatitudes of Ceres, but any polar domes [ Ruesch et al ., ] would experience lower temperatures and would not flow appreciably over geologic time.…”

Section: Discussionmentioning

confidence: 99%

The vanishing cryovolcanoes of Ceres

Sori

Byrne

Bland

et al. 2017

Geophysical Research Letters

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Ahuna Mons is a 4 km tall mountain on Ceres interpreted as a geologically young cryovolcanic dome. Other possible cryovolcanic features are more ambiguous, implying that cryovolcanism is only a recent phenomenon or that other cryovolcanic structures have been modified beyond easy identification. We test the hypothesis that Cerean cryovolcanic domes viscously relax, precluding ancient domes from recognition. We use numerical models to predict flow velocities of Ahuna Mons to be 10–500 m/Myr, depending upon assumptions about ice content, rheology, grain size, and thermal parameters. Slower flow rates in this range are sufficiently fast to induce extensive relaxation of cryovolcanic structures over 108–109 years, but gradual enough for Ahuna Mons to remain identifiable today. Positive topographic features, including a tholus underlying Ahuna Mons, may represent relaxed cryovolcanic structures. A composition for Ahuna Mons of >40% ice explains the observed distribution of cryovolcanic structures because viscous relaxation renders old cryovolcanoes unrecognizable.

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Section: Discussionmentioning

confidence: 99%

The vanishing cryovolcanoes of Ceres

Sori

Byrne

Bland

et al. 2017

Geophysical Research Letters

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“…The data suggest that the maximum boulder survival time is around 150 Ma, where we note that the age of the oldest crater in the figure (Gaue) is very uncertain. Support for this maximum age comes from craters of this age for which we did not find boulders: One such, unnamed, crater at (162 • E, +78 • ) has an estimated age of 89-252 Ma (Ruesch et al 2018). Two others, Messor at (234 • E, +50 • ) and an unnamed crater at (186 • E, +23 • ), have estimated ages of 96-192 Ma and 88-205 Ma, respectively (Scully et al 2018).…”

Section: Boulder Lifetimementioning

confidence: 69%

The brittle boulders of dwarf planet Ceres

Schröder¹,

Carsenty²,

Hauber³

et al. 2021

Preprint

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We mapped all boulders larger than 105 m on the surface of dwarf planet Ceres using images of the Dawn framing camera acquired in the Low Altitude Mapping Orbit (lamo). We find that boulders on Ceres are more numerous towards high latitudes and have a maximum lifetime of 150 ± 50 Ma, based on crater counts. These characteristics are distinctly different from those of boulders on asteroid (4) Vesta, an earlier target of Dawn, which implies that Ceres boulders are mechanically weaker. Clues to their properties can be found in the composition of Ceres' complex crust, which is rich in phyllosilicates and salts. As water ice is though to be present only meters below the surface, we suggest that boulders also harbor ice. Furthermore, the boulder size-frequency distribution is best fit by a Weibull distribution rather than the customary power law, just like for Vesta boulders. This finding is robust in light of possible types of size measurement error.

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“…The geologic mapping investigation of Ceres led to a global geologic image with a scale of 1:10,000,000, HAMO maps at 1:1,000,000 scale, and 15 maps based on LAMO observations with a scale of 1:500,000, as well as research papers for 13 quadrangle investigations [29,[55][56][57][58][59][60][61][62][63][64][65]. The global map has not been officially published and is available upon request only [66].…”

Section: Discussion Of Resultsmentioning

confidence: 99%

A Cartographic Perspective on the Planetary Geologic Mapping Investigation of Ceres

Naß,

van Gasselt

2023

Remote Sensing

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The NASA Dawn spacecraft visited asteroid 4 Vesta between 2011 and 2012 and dwarf planet 1 Ceres between 2015 and 2018 to investigate their surfaces through optical and hyperspectral imaging and their composition through gamma-ray and neutron spectroscopy. For the global mapping investigation of both proto-planets, geologic mappers employed Geographic Information System (GIS) software to map 15 quadrangles using optical and hyperspectral data and to produce views of the geologic evolution through individual maps and research papers. While geologic mapping was the core motivation of the mapping investigation, the project never aimed to produce homogeneous and consistent map representations. The chosen mapping approach and its implementation led to a number of inconsistencies regarding cartographic representation, including differential generalization through varying mapping scales, topologic inconsistencies, lack of semantic integrity, and scale consistency, and ultimately, to the management of reusable research data. Ongoing data acquisition during the mapping phase created additional challenges for the homogenization of mapping results and a potential derivation of a global map. This contribution reviews cartographic and data perspectives on the mapping investigation of Ceres and highlights (a) data sources, (b) the cartographic concept, (c) mapping conduct, and (d) dissemination as well as research-data management arrangements. It furthermore discusses decisions and experiences made during mapping and finishes with a set of recommendations from the viewpoint of the cartographic sciences.

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Geology of Ceres’ North Pole quadrangle with Dawn FC imaging data

Cited by 8 publications

References 42 publications

The vanishing cryovolcanoes of Ceres

The vanishing cryovolcanoes of Ceres

The brittle boulders of dwarf planet Ceres

A Cartographic Perspective on the Planetary Geologic Mapping Investigation of Ceres

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