The geologically recent giant impact basins at Vesta's south pole

Paul Schenk, David P. O'Brien, Simone Marchi, Robert Gaskell, Frank Preusker, Thomas Roatsch, Ralf Jaumann, Debra Buczkowski, Thomas McCord, Harry Y. McSween, David Williams, Aileen Yingst, Carol Raymond, Chris Russell

Research output: Contribution to journalArticle

132 Citations (Scopus)

Abstract

Dawn's global mapping of Vesta reveals that its observed south polar depression is composed of two overlapping giant impact features. These large basins provide exceptional windows into impact processes at planetary scales. The youngest, Rheasilvia, is 500 kilometers wide and 19 kilometers deep and finds its nearest morphologic analog among large basins on low-gravity icy satellites. Extensive ejecta deposits occur, but impact melt volume is low, exposing an unusual spiral fracture pattern that is likely related to faulting during uplift and convergence of the basin floor. Rheasilvia obliterated half of another 400-kilometer-wide impact basin, Veneneia. Both basins are unexpectedly young, roughly 1 to 2 billion years, and their formation substantially reset Vestan geology and excavated sufficient volumes of older compositionally heterogeneous crustal material to have created the Vestoids and howardite-eucrite-diogenite meteorites.

Original languageEnglish (US)
Pages (from-to)694-697
Number of pages4
JournalScience
Volume336
Issue number6082
DOIs
StatePublished - May 11 2012

Fingerprint

Hypogravity
Meteoroids
Geology
Bone Fractures

ASJC Scopus subject areas

  • General

Cite this

Schenk, P., O'Brien, D. P., Marchi, S., Gaskell, R., Preusker, F., Roatsch, T., ... Russell, C. (2012). The geologically recent giant impact basins at Vesta's south pole. Science, 336(6082), 694-697. https://doi.org/10.1126/science.1223272

The geologically recent giant impact basins at Vesta's south pole. / Schenk, Paul; O'Brien, David P.; Marchi, Simone; Gaskell, Robert; Preusker, Frank; Roatsch, Thomas; Jaumann, Ralf; Buczkowski, Debra; McCord, Thomas; McSween, Harry Y.; Williams, David; Yingst, Aileen; Raymond, Carol; Russell, Chris.

In: Science, Vol. 336, No. 6082, 11.05.2012, p. 694-697.

Research output: Contribution to journalArticle

Schenk, P, O'Brien, DP, Marchi, S, Gaskell, R, Preusker, F, Roatsch, T, Jaumann, R, Buczkowski, D, McCord, T, McSween, HY, Williams, D, Yingst, A, Raymond, C & Russell, C 2012, 'The geologically recent giant impact basins at Vesta's south pole', Science, vol. 336, no. 6082, pp. 694-697. https://doi.org/10.1126/science.1223272
Schenk P, O'Brien DP, Marchi S, Gaskell R, Preusker F, Roatsch T et al. The geologically recent giant impact basins at Vesta's south pole. Science. 2012 May 11;336(6082):694-697. https://doi.org/10.1126/science.1223272
Schenk, Paul ; O'Brien, David P. ; Marchi, Simone ; Gaskell, Robert ; Preusker, Frank ; Roatsch, Thomas ; Jaumann, Ralf ; Buczkowski, Debra ; McCord, Thomas ; McSween, Harry Y. ; Williams, David ; Yingst, Aileen ; Raymond, Carol ; Russell, Chris. / The geologically recent giant impact basins at Vesta's south pole. In: Science. 2012 ; Vol. 336, No. 6082. pp. 694-697.
@article{6f50da42c2614cdd9afe4ace4cefc541,
title = "The geologically recent giant impact basins at Vesta's south pole",
abstract = "Dawn's global mapping of Vesta reveals that its observed south polar depression is composed of two overlapping giant impact features. These large basins provide exceptional windows into impact processes at planetary scales. The youngest, Rheasilvia, is 500 kilometers wide and 19 kilometers deep and finds its nearest morphologic analog among large basins on low-gravity icy satellites. Extensive ejecta deposits occur, but impact melt volume is low, exposing an unusual spiral fracture pattern that is likely related to faulting during uplift and convergence of the basin floor. Rheasilvia obliterated half of another 400-kilometer-wide impact basin, Veneneia. Both basins are unexpectedly young, roughly 1 to 2 billion years, and their formation substantially reset Vestan geology and excavated sufficient volumes of older compositionally heterogeneous crustal material to have created the Vestoids and howardite-eucrite-diogenite meteorites.",
author = "Paul Schenk and O'Brien, {David P.} and Simone Marchi and Robert Gaskell and Frank Preusker and Thomas Roatsch and Ralf Jaumann and Debra Buczkowski and Thomas McCord and McSween, {Harry Y.} and David Williams and Aileen Yingst and Carol Raymond and Chris Russell",
year = "2012",
month = "5",
day = "11",
doi = "10.1126/science.1223272",
language = "English (US)",
volume = "336",
pages = "694--697",
journal = "Science",
issn = "0036-8075",
publisher = "American Association for the Advancement of Science",
number = "6082",

}

TY - JOUR

T1 - The geologically recent giant impact basins at Vesta's south pole

AU - Schenk, Paul

AU - O'Brien, David P.

AU - Marchi, Simone

AU - Gaskell, Robert

AU - Preusker, Frank

AU - Roatsch, Thomas

AU - Jaumann, Ralf

AU - Buczkowski, Debra

AU - McCord, Thomas

AU - McSween, Harry Y.

AU - Williams, David

AU - Yingst, Aileen

AU - Raymond, Carol

AU - Russell, Chris

PY - 2012/5/11

Y1 - 2012/5/11

N2 - Dawn's global mapping of Vesta reveals that its observed south polar depression is composed of two overlapping giant impact features. These large basins provide exceptional windows into impact processes at planetary scales. The youngest, Rheasilvia, is 500 kilometers wide and 19 kilometers deep and finds its nearest morphologic analog among large basins on low-gravity icy satellites. Extensive ejecta deposits occur, but impact melt volume is low, exposing an unusual spiral fracture pattern that is likely related to faulting during uplift and convergence of the basin floor. Rheasilvia obliterated half of another 400-kilometer-wide impact basin, Veneneia. Both basins are unexpectedly young, roughly 1 to 2 billion years, and their formation substantially reset Vestan geology and excavated sufficient volumes of older compositionally heterogeneous crustal material to have created the Vestoids and howardite-eucrite-diogenite meteorites.

AB - Dawn's global mapping of Vesta reveals that its observed south polar depression is composed of two overlapping giant impact features. These large basins provide exceptional windows into impact processes at planetary scales. The youngest, Rheasilvia, is 500 kilometers wide and 19 kilometers deep and finds its nearest morphologic analog among large basins on low-gravity icy satellites. Extensive ejecta deposits occur, but impact melt volume is low, exposing an unusual spiral fracture pattern that is likely related to faulting during uplift and convergence of the basin floor. Rheasilvia obliterated half of another 400-kilometer-wide impact basin, Veneneia. Both basins are unexpectedly young, roughly 1 to 2 billion years, and their formation substantially reset Vestan geology and excavated sufficient volumes of older compositionally heterogeneous crustal material to have created the Vestoids and howardite-eucrite-diogenite meteorites.

UR - http://www.scopus.com/inward/record.url?scp=84860804991&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84860804991&partnerID=8YFLogxK

U2 - 10.1126/science.1223272

DO - 10.1126/science.1223272

M3 - Article

VL - 336

SP - 694

EP - 697

JO - Science

JF - Science

SN - 0036-8075

IS - 6082

ER -