Exploring Exogenic Sources for the Olivine on Asteroid (4) Vesta
The detection of olivine on Vesta is interesting because it may provide critical insights into planetary differentiation early in our Solar System's history. Ground-based and Hubble Space Telescope (HST) observations of asteroid (4) Vesta have suggested the presence of olivine on the surface. T...
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ftdatacite:10.48550/arxiv.1502.03189 2023-05-15T18:23:09+02:00 Exploring Exogenic Sources for the Olivine on Asteroid (4) Vesta Corre, Lucille Le Reddy, Vishnu Sanchez, Juan A. Dunn, Tasha Cloutis, Edward A. Izawa, Matthew R. M. Mann, Paul Nathues, Andreas 2015 https://dx.doi.org/10.48550/arxiv.1502.03189 https://arxiv.org/abs/1502.03189 unknown arXiv https://dx.doi.org/10.1016/j.icarus.2015.01.018 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Earth and Planetary Astrophysics astro-ph.EP Geophysics physics.geo-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 2015 ftdatacite https://doi.org/10.48550/arxiv.1502.03189 https://doi.org/10.1016/j.icarus.2015.01.018 2022-04-01T12:27:24Z The detection of olivine on Vesta is interesting because it may provide critical insights into planetary differentiation early in our Solar System's history. Ground-based and Hubble Space Telescope (HST) observations of asteroid (4) Vesta have suggested the presence of olivine on the surface. These observations were reinforced by the discovery of olivine-rich HED meteorites from Vesta in recent years. However, analysis of data from NASA's Dawn spacecraft has shown that this olivine-bearing unit is actually impact melt in the ejecta of Oppia crater. The lack of widespread mantle olivine, exposed during the formation of the 19 km deep Rheasilvia basin on Vesta's South Pole, further complicated this picture. Ammannito et al., (2013a) reported the discovery of local scale olivine-rich units in the form of excavated material from the mantle using the Visible and InfraRed spectrometer (VIR) on Dawn. Here we explore alternative sources for the olivine in the northern hemisphere of Vesta by reanalyzing the data from the VIR instrument using laboratory spectral measurements of meteorites. We suggest that these olivine exposures could be explained by the delivery of olivine-rich exogenic material. Based on our spectral band parameters analysis, the lack of correlation between the location of these olivine-rich terrains and possible mantle-excavating events, and supported by observations of HED meteorites, we propose that a probable source for olivine seen in the northern hemisphere are remnants of impactors made of olivine-rich meteorites. Best match suggests these units are HED material mixed with either ordinary chondrites, or with some olivine-dominated meteorites such as R-chondrites. : 62 pages, 12 figures, 4 tables; Icarus, Available online 30 January 2015, ISSN 0019-1035, http://dx.doi.org/10.1016/j.icarus.2015.01.018 Text South pole DataCite Metadata Store (German National Library of Science and Technology) Hubble ENVELOPE(158.317,158.317,-80.867,-80.867) South Pole |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Earth and Planetary Astrophysics astro-ph.EP Geophysics physics.geo-ph FOS Physical sciences |
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Earth and Planetary Astrophysics astro-ph.EP Geophysics physics.geo-ph FOS Physical sciences Corre, Lucille Le Reddy, Vishnu Sanchez, Juan A. Dunn, Tasha Cloutis, Edward A. Izawa, Matthew R. M. Mann, Paul Nathues, Andreas Exploring Exogenic Sources for the Olivine on Asteroid (4) Vesta |
topic_facet |
Earth and Planetary Astrophysics astro-ph.EP Geophysics physics.geo-ph FOS Physical sciences |
description |
The detection of olivine on Vesta is interesting because it may provide critical insights into planetary differentiation early in our Solar System's history. Ground-based and Hubble Space Telescope (HST) observations of asteroid (4) Vesta have suggested the presence of olivine on the surface. These observations were reinforced by the discovery of olivine-rich HED meteorites from Vesta in recent years. However, analysis of data from NASA's Dawn spacecraft has shown that this olivine-bearing unit is actually impact melt in the ejecta of Oppia crater. The lack of widespread mantle olivine, exposed during the formation of the 19 km deep Rheasilvia basin on Vesta's South Pole, further complicated this picture. Ammannito et al., (2013a) reported the discovery of local scale olivine-rich units in the form of excavated material from the mantle using the Visible and InfraRed spectrometer (VIR) on Dawn. Here we explore alternative sources for the olivine in the northern hemisphere of Vesta by reanalyzing the data from the VIR instrument using laboratory spectral measurements of meteorites. We suggest that these olivine exposures could be explained by the delivery of olivine-rich exogenic material. Based on our spectral band parameters analysis, the lack of correlation between the location of these olivine-rich terrains and possible mantle-excavating events, and supported by observations of HED meteorites, we propose that a probable source for olivine seen in the northern hemisphere are remnants of impactors made of olivine-rich meteorites. Best match suggests these units are HED material mixed with either ordinary chondrites, or with some olivine-dominated meteorites such as R-chondrites. : 62 pages, 12 figures, 4 tables; Icarus, Available online 30 January 2015, ISSN 0019-1035, http://dx.doi.org/10.1016/j.icarus.2015.01.018 |
format |
Text |
author |
Corre, Lucille Le Reddy, Vishnu Sanchez, Juan A. Dunn, Tasha Cloutis, Edward A. Izawa, Matthew R. M. Mann, Paul Nathues, Andreas |
author_facet |
Corre, Lucille Le Reddy, Vishnu Sanchez, Juan A. Dunn, Tasha Cloutis, Edward A. Izawa, Matthew R. M. Mann, Paul Nathues, Andreas |
author_sort |
Corre, Lucille Le |
title |
Exploring Exogenic Sources for the Olivine on Asteroid (4) Vesta |
title_short |
Exploring Exogenic Sources for the Olivine on Asteroid (4) Vesta |
title_full |
Exploring Exogenic Sources for the Olivine on Asteroid (4) Vesta |
title_fullStr |
Exploring Exogenic Sources for the Olivine on Asteroid (4) Vesta |
title_full_unstemmed |
Exploring Exogenic Sources for the Olivine on Asteroid (4) Vesta |
title_sort |
exploring exogenic sources for the olivine on asteroid (4) vesta |
publisher |
arXiv |
publishDate |
2015 |
url |
https://dx.doi.org/10.48550/arxiv.1502.03189 https://arxiv.org/abs/1502.03189 |
long_lat |
ENVELOPE(158.317,158.317,-80.867,-80.867) |
geographic |
Hubble South Pole |
geographic_facet |
Hubble South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://dx.doi.org/10.1016/j.icarus.2015.01.018 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1502.03189 https://doi.org/10.1016/j.icarus.2015.01.018 |
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1766202642857459712 |