Please use this identifier to cite or link to this item:
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Diverse Lithologies and Alteration Events on the Rim of Noachian-Aged Endeavour Crater, Meridiani Planum, Mars: In-Situ Compositional Evidence
Author(s): Mittlefehldt, David
Gellert, Ralf
VanBommel, Scott
Ming, Douglas
Yen, Albert
Clark, Benton C
Morris, Richard
Schröder, Christian
Crumpler, Larry S
Grant, John A
Jolliff, Bradley L
Arvidson, Raymond E
Farrand, William H
Herkenhoff, Kenneth E
Bell, James
Cohen, Barbara
Klingelhöfer, Göstar
Schrader, Christian
Rice, James
Contact Email:
Keywords: Mars Exploration Rover
Endeavour Crater
impact breccia
Mars alteration
Issue Date: 31-May-2018
Citation: Mittlefehldt D, Gellert R, VanBommel S, Ming D, Yen A, Clark BC, Morris R, Schröder C, Crumpler LS, Grant JA, Jolliff BL, Arvidson RE, Farrand WH, Herkenhoff KE, Bell J, Cohen B, Klingelhöfer G, Schrader C & Rice J (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, 123 (5), pp. 1255-1306.
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 46 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 pre-impact 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.
DOI Link: 10.1002/2017JE005474
Rights: [820292_2_merged_1518031799.pdf] The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
[Mittlefehldt_et_al-2018-Journal_of_Geophysical_Research3A_Planets.pdf] Mittlefehldt, D. W., Gellert, R., vanBommel, S., Ming, D. W., Yen, A. S., Clark, B. C., et al. ( 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, 123, 1255– 1306.

Files in This Item:
File Description SizeFormat 
820292_2_merged_1518031799.pdfFulltext - Accepted Version23.91 MBAdobe PDFUnder Permanent Embargo    Request a copy
2017JE005474R-SI01.pdfFulltext - Accepted Version141.7 kBAdobe PDFUnder Permanent Embargo    Request a copy
Mittlefehldt_et_al-2018-Journal_of_Geophysical_Research3A_Planets.pdfFulltext - Published Version8.04 MBAdobe PDFView/Open

This item is protected by original copyright

Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

If you believe that any material held in STORRE infringes copyright, please contact providing details and we will remove the Work from public display in STORRE and investigate your claim.