Vesta's Pinaria region: Original basaltic achondrite material derived from mixing upper and lower crust

L. A. McFadden; J. P. Combe; E. Ammannito; A. Frigeri; K. Stephan; A. Longobardo; E. Palomba; F. Tosi; F. Zambon; K. Krohn; M. C. De Sanctis; V. Reddy; L. Le Corre; A. Nathues; C. M. Pieters; T. H. Prettyman; C. A. Raymond; C. T. Russell

doi:10.1016/j.icarus.2015.07.003

Vesta's Pinaria region: Original basaltic achondrite material derived from mixing upper and lower crust

L. A. McFadden, J. P. Combe, E. Ammannito, A. Frigeri, K. Stephan, A. Longobardo, E. Palomba, F. Tosi, F. Zambon, K. Krohn, M. C. De Sanctis, V. Reddy, L. Le Corre, A. Nathues, C. M. Pieters, T. H. Prettyman, C. A. Raymond, C. T. Russell

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Analysis of data from the Dawn mission shows that the Pinaria region of Vesta spanning a portion of the rim of the Rheasilvia basin is bright and anhydrous. Reflectance spectra, absorption band centers, and their variations, cover the range of pyroxenes from diogenite-rich to howardite and eucrite compositions, with no evidence of olivine in this region. By examining band centers and depths of the floor, walls and rims of six major craters in the region, we find a lane of diogenite-rich material next to howardite-eucrite material that does not follow the local topography. The source of this material is not clear and is probably ejecta from post-Rheasilvia impacts. Material of a howardite-eucrite composition originating from beyond the Rheasilvia basin is evident on the western edge of the region. Overall, the Pinaria region exposes the complete range of basaltic achondrite parent body material, with little evidence of contamination of non-basaltic achondrite material. With both high reflectance and low abundance of hydrated material, this region of Vesta may be considered the "Pinaria desert".

Original language	English (US)
Pages (from-to)	150-161
Number of pages	12
Journal	Icarus
Volume	259
DOIs	https://doi.org/10.1016/j.icarus.2015.07.003
State	Published - Jan 30 2015
Externally published	Yes

Keywords

Asteroid Vesta
Asteroids, composition
Asteroids, surfaces
Meteorites
Mineralogy

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1016/j.icarus.2015.07.003

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McFadden, L. A., Combe, J. P., Ammannito, E., Frigeri, A., Stephan, K., Longobardo, A., Palomba, E., Tosi, F., Zambon, F., Krohn, K., De Sanctis, M. C., Reddy, V., Le Corre, L., Nathues, A., Pieters, C. M., Prettyman, T. H., Raymond, C. A., & Russell, C. T. (2015). Vesta's Pinaria region: Original basaltic achondrite material derived from mixing upper and lower crust. Icarus, 259, 150-161. https://doi.org/10.1016/j.icarus.2015.07.003

McFadden, LA, Combe, JP, Ammannito, E, Frigeri, A, Stephan, K, Longobardo, A, Palomba, E, Tosi, F, Zambon, F, Krohn, K, De Sanctis, MC, Reddy, V, Le Corre, L, Nathues, A, Pieters, CM, Prettyman, TH, Raymond, CA & Russell, CT 2015, 'Vesta's Pinaria region: Original basaltic achondrite material derived from mixing upper and lower crust', Icarus, vol. 259, pp. 150-161. https://doi.org/10.1016/j.icarus.2015.07.003

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title = "Vesta's Pinaria region: Original basaltic achondrite material derived from mixing upper and lower crust",

abstract = "Analysis of data from the Dawn mission shows that the Pinaria region of Vesta spanning a portion of the rim of the Rheasilvia basin is bright and anhydrous. Reflectance spectra, absorption band centers, and their variations, cover the range of pyroxenes from diogenite-rich to howardite and eucrite compositions, with no evidence of olivine in this region. By examining band centers and depths of the floor, walls and rims of six major craters in the region, we find a lane of diogenite-rich material next to howardite-eucrite material that does not follow the local topography. The source of this material is not clear and is probably ejecta from post-Rheasilvia impacts. Material of a howardite-eucrite composition originating from beyond the Rheasilvia basin is evident on the western edge of the region. Overall, the Pinaria region exposes the complete range of basaltic achondrite parent body material, with little evidence of contamination of non-basaltic achondrite material. With both high reflectance and low abundance of hydrated material, this region of Vesta may be considered the {"}Pinaria desert{"}.",

keywords = "Asteroid Vesta, Asteroids, composition, Asteroids, surfaces, Meteorites, Mineralogy",

author = "McFadden, {L. A.} and Combe, {J. P.} and E. Ammannito and A. Frigeri and K. Stephan and A. Longobardo and E. Palomba and F. Tosi and F. Zambon and K. Krohn and {De Sanctis}, {M. C.} and V. Reddy and {Le Corre}, L. and A. Nathues and Pieters, {C. M.} and Prettyman, {T. H.} and Raymond, {C. A.} and Russell, {C. T.}",

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year = "2015",

month = jan,

day = "30",

doi = "10.1016/j.icarus.2015.07.003",

language = "English (US)",

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TY - JOUR

T1 - Vesta's Pinaria region

T2 - Original basaltic achondrite material derived from mixing upper and lower crust

AU - McFadden, L. A.

AU - Combe, J. P.

AU - Ammannito, E.

AU - Frigeri, A.

AU - Stephan, K.

AU - Longobardo, A.

AU - Palomba, E.

AU - Tosi, F.

AU - Zambon, F.

AU - Krohn, K.

AU - De Sanctis, M. C.

AU - Reddy, V.

AU - Le Corre, L.

AU - Nathues, A.

AU - Pieters, C. M.

AU - Prettyman, T. H.

AU - Raymond, C. A.

AU - Russell, C. T.

PY - 2015/1/30

Y1 - 2015/1/30

N2 - Analysis of data from the Dawn mission shows that the Pinaria region of Vesta spanning a portion of the rim of the Rheasilvia basin is bright and anhydrous. Reflectance spectra, absorption band centers, and their variations, cover the range of pyroxenes from diogenite-rich to howardite and eucrite compositions, with no evidence of olivine in this region. By examining band centers and depths of the floor, walls and rims of six major craters in the region, we find a lane of diogenite-rich material next to howardite-eucrite material that does not follow the local topography. The source of this material is not clear and is probably ejecta from post-Rheasilvia impacts. Material of a howardite-eucrite composition originating from beyond the Rheasilvia basin is evident on the western edge of the region. Overall, the Pinaria region exposes the complete range of basaltic achondrite parent body material, with little evidence of contamination of non-basaltic achondrite material. With both high reflectance and low abundance of hydrated material, this region of Vesta may be considered the "Pinaria desert".

AB - Analysis of data from the Dawn mission shows that the Pinaria region of Vesta spanning a portion of the rim of the Rheasilvia basin is bright and anhydrous. Reflectance spectra, absorption band centers, and their variations, cover the range of pyroxenes from diogenite-rich to howardite and eucrite compositions, with no evidence of olivine in this region. By examining band centers and depths of the floor, walls and rims of six major craters in the region, we find a lane of diogenite-rich material next to howardite-eucrite material that does not follow the local topography. The source of this material is not clear and is probably ejecta from post-Rheasilvia impacts. Material of a howardite-eucrite composition originating from beyond the Rheasilvia basin is evident on the western edge of the region. Overall, the Pinaria region exposes the complete range of basaltic achondrite parent body material, with little evidence of contamination of non-basaltic achondrite material. With both high reflectance and low abundance of hydrated material, this region of Vesta may be considered the "Pinaria desert".

KW - Asteroid Vesta

KW - Asteroids, composition

KW - Asteroids, surfaces

KW - Meteorites

KW - Mineralogy

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DO - 10.1016/j.icarus.2015.07.003

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JO - Icarus

JF - Icarus

ER -

Vesta's Pinaria region: Original basaltic achondrite material derived from mixing upper and lower crust

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