Diverse Lithologies and Alteration Events on the Rim of Noachian-Aged Endeavour Crater, Meridiani Planum, Mars

In Situ Compositional Evidence

David W. Mittlefehldt, Ralf Gellert, Scott vanBommel, Douglas W. Ming, Albert S. Yen, Benton C. Clark, Richard V. Morris, Christian Schröder, Larry S. Crumpler, John A. Grant, Bradley L. Jolliff, Raymond E. Arvidson, William H. Farrand, Kenneth E. Herkenhoff, James Bell, Barbara A. Cohen, Göstar Klingelhöfer, Christian M. Schrader, James W. Rice

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We report the results of geological studies by the Opportunity Mars rover on the Endeavour Crater rim. Four major units occur in the region (oldest to youngest): the Matijevic, Shoemaker, Grasberg, and Burns formations. The Matijevic formation, consisting of fine-grained clastic sediments, is the only pre-Endeavour-impact unit and might be part of the Noachian etched units of Meridiani Planum. The Shoemaker formation is a heterogeneous polymict impact breccia; its lowermost member incorporates material eroded from the underlying Matijevic formation. The Shoemaker formation is a close analog to the Bunte Breccia of the Ries Crater, although the average clast sizes are substantially larger in the latter. The Grasberg formation is a thin, fine-grained, homogeneous sediment unconformably overlying the Shoemaker formation and likely formed as an airfall deposit of unknown areal extent. The Burns formation sandstone overlies the Grasberg, but compositions of the two units are distinct; there is no evidence that the Grasberg formation is a fine-grained subfacies of the Burns formation. The rocks along the Endeavour Crater rim were affected by at least four episodes of alteration in the Noachian and Early Hesperian: (i) vein formation and alteration of preimpact Matijevic formation rocks, (ii) low-water/rock alteration along the disconformity between the Matijevic and Shoemaker formations, (iii) alteration of the Shoemaker formation along fracture zones, and (iv) differential mobilization of Fe and Mn, and CaSO4-vein formation in the Grasberg and Shoemaker formations. Episodes (ii) and (iii) possibly occurred together, but (i) and (iv) are distinct from either of these.

Original languageEnglish (US)
Pages (from-to)1255-1306
Number of pages52
JournalJournal of Geophysical Research: Planets
Volume123
Issue number5
DOIs
StatePublished - May 1 2018

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Temazepam
Lithology
lithology
rims
craters
mars
crater
Mars
rocks
Rocks
breccia
Sediments
rock
Bunter
sediments
clastic sediment
fine grained sediment
sandstone
Sandstone
fracture zone

Keywords

  • Endeavour Crater
  • geochemistry
  • impact breccia
  • Mars alteration
  • Mars Exploration Rover

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

Diverse Lithologies and Alteration Events on the Rim of Noachian-Aged Endeavour Crater, Meridiani Planum, Mars : In Situ Compositional Evidence. / Mittlefehldt, David W.; Gellert, Ralf; vanBommel, Scott; Ming, Douglas W.; Yen, Albert S.; Clark, Benton C.; Morris, Richard V.; Schröder, Christian; Crumpler, Larry S.; Grant, John A.; Jolliff, Bradley L.; Arvidson, Raymond E.; Farrand, William H.; Herkenhoff, Kenneth E.; Bell, James; Cohen, Barbara A.; Klingelhöfer, Göstar; Schrader, Christian M.; Rice, James W.

In: Journal of Geophysical Research: Planets, Vol. 123, No. 5, 01.05.2018, p. 1255-1306.

Research output: Contribution to journalArticle

Mittlefehldt, DW, Gellert, R, vanBommel, S, Ming, DW, Yen, AS, Clark, BC, Morris, RV, Schröder, C, Crumpler, LS, Grant, JA, Jolliff, BL, Arvidson, RE, Farrand, WH, Herkenhoff, KE, Bell, J, Cohen, BA, Klingelhöfer, G, Schrader, CM & Rice, JW 2018, 'Diverse Lithologies and Alteration Events on the Rim of Noachian-Aged Endeavour Crater, Meridiani Planum, Mars: In Situ Compositional Evidence', Journal of Geophysical Research: Planets, vol. 123, no. 5, pp. 1255-1306. https://doi.org/10.1002/2017JE005474
Mittlefehldt, David W. ; Gellert, Ralf ; vanBommel, Scott ; Ming, Douglas W. ; Yen, Albert S. ; Clark, Benton C. ; Morris, Richard V. ; Schröder, Christian ; Crumpler, Larry S. ; Grant, John A. ; Jolliff, Bradley L. ; Arvidson, Raymond E. ; Farrand, William H. ; Herkenhoff, Kenneth E. ; Bell, James ; Cohen, Barbara A. ; Klingelhöfer, Göstar ; Schrader, Christian M. ; Rice, James W. / Diverse Lithologies and Alteration Events on the Rim of Noachian-Aged Endeavour Crater, Meridiani Planum, Mars : In Situ Compositional Evidence. In: Journal of Geophysical Research: Planets. 2018 ; Vol. 123, No. 5. pp. 1255-1306.
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AU - Gellert, Ralf

AU - vanBommel, Scott

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