Aqueously altered igneous rocks sampled on the floor of Jezero crater, Mars

Research output: Contribution to journalJournal articleResearchpeer-review


  • Fulltext

    Accepted author manuscript, 5.31 MB, PDF document

  • K. A. Farley
  • K. M. Stack
  • D. L. Shuster
  • B. H. N. Horgan
  • J. A. Hurowitz
  • J. D. Tarnas
  • J. I. Simon
  • V. Z. Sun
  • E. L. Scheller
  • K. R. Moore
  • S. M. McLennan
  • P. M. Vasconcelos
  • R. C. Wiens
  • A. H. Treiman
  • L. E. Mayhew
  • O. Beyssac
  • T. V. Kizovski
  • N. J. Tosca
  • K. H. Williford
  • L. S. Crumpler
  • L. W. Beegle
  • J. F. Bell
  • B. L. Ehlmann
  • Y. Liu
  • J. N. Maki
  • M. E. Schmidt
  • A. C. Allwood
  • H. E. F. Amundsen
  • R. Bhartia
  • T. Bosak
  • A. J. Brown
  • B. C. Clark
  • A. Cousin
  • O. Forni
  • T. S. J. Gabriel
  • Y. Goreva
  • S. Gupta
  • S.-E. Hamran
  • C. D. K. Herd
  • K. Hickman-Lewis
  • J. R. Johnson
  • L. C. Kah
  • P. B. Kelemen
  • L. Mandon
  • N. Mangold
  • C. Quantin-Nataf
  • M. S. Rice
  • P. S. Russell
  • S. Sharma
  • S. Siljeström
  • A. Steele
  • R. Sullivan
  • M. Wadhwa
  • B. P. Weiss
  • A. J. Williams
  • B. V. Wogsland
  • P. A. Willis
  • T. A. Acosta-Maeda
  • P. Beck
  • K. Benzerara
  • S. Bernard
  • A. S. Burton
  • E. L. Cardarelli
  • B. Chide
  • E. Clavé
  • E. A. Cloutis
  • B. A. Cohen
  • A. D. Czaja
  • V. Debaille
  • E. Dehouck
  • A. G. Fairén
  • D. T. Flannery
  • S. Z. Fleron
  • T. Fouchet
  • B. J. Garczynski
  • E. F. Gibbons
  • E. M. Hausrath
  • A. G. Hayes
  • J. Henneke
  • J. L. Jørgensen
  • E. M. Kelly
  • J. Lasue
  • S. Le Mouélic
  • J. M. Madariaga
  • S. Maurice
  • M. Merusi
  • P.-Y. Meslin
  • S. M. Milkovich
  • C. C. Million
  • R. C. Moeller
  • J. I. Nuñez
  • A. M. Ollila
  • G. Paar
  • D. A. Paige
  • D. A. K. Pedersen
  • P. Pilleri
  • C. Pilorget
  • P. C. Pinet
  • J. W. Rice
  • C. Royer
  • V. Sautter
  • M. Schulte
  • M. A. Sephton
  • S. K. Sharma
  • S. F. Sholes
  • N. Spanovich
  • M. St. Clair
  • C. D. Tate
  • K. Uckert
  • S. J. VanBommel
  • A. G. Yanchilina
  • M.-P. Zorzano

The Perseverance rover landed in Jezero crater, Mars, to investigate ancient lake and river deposits. We report observations of the crater floor, below the crater's sedimentary delta, finding that the floor consists of igneous rocks altered by water. The lowest exposed unit, informally named Seitah, is a coarsely crystalline olivine-rich rock, which accumulated at the base of a magma body. Magnesium-iron carbonates along grain boundaries indicate reactions with carbon dioxide-rich water under water-poor conditions. Overlying Seitah is a unit informally named Maaz, which we interpret as lava flows or the chemical complement to Seitah in a layered igneous body. Voids in these rocks contain sulfates and perchlorates, likely introduced by later near-surface brine evaporation. Core samples of these rocks have been stored aboard Perseverance for potential return to Earth.

Original languageEnglish
Article numbereabo2196
Issue number6614
Number of pages12
Publication statusPublished - 30 Sep 2022

    Research areas


ID: 329574677