Large-scale troughs on Vesta

A signature of planetary tectonics

D. L. Buczkowski, D. Y. Wyrick, K. A. Iyer, E. G. Kahn, J. E C Scully, A. Nathues, R. W. Gaskell, T. Roatsch, F. Preusker, P. M. Schenk, L. Le Corre, V. Reddy, R. A. Yingst, S. Mest, David Williams, W. B. Garry, O. S. Barnouin, R. Jaumann, C. A. Raymond, C. T. Russell

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Images of Vesta taken by the Dawn spacecraft reveal large-scale linear structural features on the surface of the asteroid. We evaluate the morphology of the Vesta structures to determine what processes caused them to form and what implications this has for the history of Vesta as a planetary body. The dimensions and shape of these features suggest that they are graben similar to those observed on terrestrial planets, not fractures or grooves such as are found on smaller asteroids. As graben, their vertical displacement versus length relationship could be evaluated to describe and interpret the evolution of the component faults. Linear structures are commonly observed on smaller asteroids and their formation has been tied to impact events. While the orientation of the large-scale Vesta structures does imply that their formation is related to the impact events that formed the Rheasilvia and Veneneia basins, their size and morphology is greatly different from impact-formed fractures on the smaller bodies. This is consistent with new analyses that suggest that Vesta is fully differentiated, with a mantle and core. We suggest that impact into a differentiated asteroid such as Vesta could result in graben, while grooves and fractures would form on undifferentiated asteroids.

Original languageEnglish (US)
Article numberL18205
JournalGeophysical Research Letters
Volume39
Issue number17
DOIs
StatePublished - 2012

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asteroids
troughs
asteroid
tectonics
trough
signatures
graben
grooves
terrestrial planets
spacecraft
Earth mantle
planet
histories
mantle
history
basin

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Geophysics

Cite this

Buczkowski, D. L., Wyrick, D. Y., Iyer, K. A., Kahn, E. G., Scully, J. E. C., Nathues, A., ... Russell, C. T. (2012). Large-scale troughs on Vesta: A signature of planetary tectonics. Geophysical Research Letters, 39(17), [L18205]. https://doi.org/10.1029/2012GL052959

Large-scale troughs on Vesta : A signature of planetary tectonics. / Buczkowski, D. L.; Wyrick, D. Y.; Iyer, K. A.; Kahn, E. G.; Scully, J. E C; Nathues, A.; Gaskell, R. W.; Roatsch, T.; Preusker, F.; Schenk, P. M.; Le Corre, L.; Reddy, V.; Yingst, R. A.; Mest, S.; Williams, David; Garry, W. B.; Barnouin, O. S.; Jaumann, R.; Raymond, C. A.; Russell, C. T.

In: Geophysical Research Letters, Vol. 39, No. 17, L18205, 2012.

Research output: Contribution to journalArticle

Buczkowski, DL, Wyrick, DY, Iyer, KA, Kahn, EG, Scully, JEC, Nathues, A, Gaskell, RW, Roatsch, T, Preusker, F, Schenk, PM, Le Corre, L, Reddy, V, Yingst, RA, Mest, S, Williams, D, Garry, WB, Barnouin, OS, Jaumann, R, Raymond, CA & Russell, CT 2012, 'Large-scale troughs on Vesta: A signature of planetary tectonics', Geophysical Research Letters, vol. 39, no. 17, L18205. https://doi.org/10.1029/2012GL052959
Buczkowski DL, Wyrick DY, Iyer KA, Kahn EG, Scully JEC, Nathues A et al. Large-scale troughs on Vesta: A signature of planetary tectonics. Geophysical Research Letters. 2012;39(17). L18205. https://doi.org/10.1029/2012GL052959
Buczkowski, D. L. ; Wyrick, D. Y. ; Iyer, K. A. ; Kahn, E. G. ; Scully, J. E C ; Nathues, A. ; Gaskell, R. W. ; Roatsch, T. ; Preusker, F. ; Schenk, P. M. ; Le Corre, L. ; Reddy, V. ; Yingst, R. A. ; Mest, S. ; Williams, David ; Garry, W. B. ; Barnouin, O. S. ; Jaumann, R. ; Raymond, C. A. ; Russell, C. T. / Large-scale troughs on Vesta : A signature of planetary tectonics. In: Geophysical Research Letters. 2012 ; Vol. 39, No. 17.
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