Aqueously altered igneous rocks sampled on the floor of Jezero crater, Mars
Kenneth A. Farley(California Institute of Technology), K. M. Stack(Jet Propulsion Laboratory), David L. Shuster(Planetary Science Institute), B. Horgan(Purdue University West Lafayette), J. A. Hurowitz(Stony Brook University), Jesse Tarnas(Jet Propulsion Laboratory), Justin I. Simon(Johnson Space Center), V. Z. Sun(Jet Propulsion Laboratory), Eva L. Scheller(California Institute of Technology), Kelsey Moore(California Institute of Technology), S. M. McLennan(Stony Brook University), Paulo Vasconcelos(The University of Queensland), R. C. Wiens(Los Alamos National Laboratory), A. H. Treiman(Universities Space Research Association), L. E. Mayhew(University of Colorado Boulder), Olivier Beyssac(Sorbonne Université), T. V. Kizovski(Brock University), Nicholas J. Tosca(University of Cambridge), Kenneth H. Williford(Blue Marble Space), L. S. Crumpler(New Mexico Museum of Natural History and Science), L. W. Beegle(Jet Propulsion Laboratory), J. F. Bell(Arizona State University), B. L. Ehlmann(California Institute of Technology), Yang Liu(Jet Propulsion Laboratory), J. N. Maki(Jet Propulsion Laboratory), M. E. Schmidt(Brock University), Abigail C. Allwood(Jet Propulsion Laboratory), H. E. F. Amundsen(University Graduate Center), R. Bhartia(Photon Systems (United States)), Tanja Bosak(Massachusetts Institute of Technology), A. J. Brown, B. C. Clark(Space Science Institute), A. Cousin(Université Toulouse III - Paul Sabatier), O. Forni(Université Toulouse III - Paul Sabatier), T. S. J. Gabriel(United States Geological Survey), Y. S. Goreva(Jet Propulsion Laboratory), Sanjeev Gupta(Imperial College London), Svein‐Erik Hamran(University Graduate Center), C. D. K. Herd(University of Alberta), Keyron Hickman‐Lewis(Natural History Museum), J. R. Johnson(Johns Hopkins University), Linda C. Kah(University of Tennessee at Knoxville), P. B. Kelemen(Lamont-Doherty Earth Observatory), K. M. Kinch(University of Copenhagen), Lucia Mandon(Université Paris Cité), N. Mangold(Université Nantes Angers Le Mans), Cathy Quantin‐Nataf(Université Claude Bernard Lyon 1), M. S. Rice(Western Washington University), P. St. J. Russell(Planetary Science Institute), Sunanda Sharma(University of Hawaiʻi at Mānoa), Sandra Siljeström(RISE Research Institutes of Sweden), A. Steele(Planetary Science Institute), R. Sullivan(Planetary Science Institute), M. Wadhwa(Arizona State University), B. P. Weiss(Jet Propulsion Laboratory), Amy J. Williams(University of Florida), Brittan Wogsland(University of Tennessee at Knoxville), Peter A. Willis(Jet Propulsion Laboratory), T. A. Acosta-Maeda(University of Hawaiʻi at Mānoa), Pierre Beck(Institut de Planétologie et d'Astrophysique de Grenoble), Karim Benzerara(Sorbonne Université), Sylvain Bernard(Sorbonne Université), Aaron S. Burton(Johnson Space Center), Emily Cardarelli(Jet Propulsion Laboratory), Baptiste Chide(Los Alamos National Laboratory), Elise Clavé(Université de Bordeaux), E. A. Cloutis(University of Winnipeg), B. A. Cohen(Goddard Space Flight Center), Andrew D. Czaja(University of Cincinnati), Vinciane Debaille(Université Libre de Bruxelles), E. Dehouck(Université Claude Bernard Lyon 1), Alberto González Fairén(Cornell University), David Flannery(Queensland University of Technology), Stephanie Fleron(University of Copenhagen), Thierry Fouchet(Université Paris Cité), J. Frydenvang(University of Copenhagen), Bradley Garczynski(Purdue University West Lafayette), Erin Gibbons(McGill University), Elisabeth M. Hausrath(University of Nevada, Las Vegas), Alexander G. Hayes(Cornell University), Jesper Henneke(DTU Space), John Leif Jørgensen(DTU Space), Evan M. Kelly(University of Hawaiʻi at Mānoa), J. Lasue(Université Toulouse III - Paul Sabatier), Stéphane Le Mouëlic(Université Nantes Angers Le Mans), Juan Manuel Madariaga(University of the Basque Country), S. Maurice(Université Toulouse III - Paul Sabatier), Marco Merusi(University of Copenhagen), Pierre‐Yves Meslin(Université Toulouse III - Paul Sabatier), S. M. Milkovich(Jet Propulsion Laboratory), Chase Million(Dynamic Concepts (United States)), R. Moeller(Jet Propulsion Laboratory), Jorge I. Núñez(Johns Hopkins University), A. Ollila(Los Alamos National Laboratory), Gerhard Paar(Joanneum Research), D. A. Paige(Planetary Science Institute), David A. K. Pedersen(DTU Space), P. Pilleri(Université Toulouse III - Paul Sabatier), C. Pilorget(Institut Universitaire de France), P. Pinet(Université Toulouse III - Paul Sabatier), J. W. Rice(Arizona State University), Clément Royer(Sorbonne Université), V. Sautter(Sorbonne Université), M. Schulte, Mark A. Sephton(Imperial College London), Shiv K. Sharma(University of Hawaiʻi at Mānoa), Steven Sholes(Jet Propulsion Laboratory), N. Spanovich(Jet Propulsion Laboratory), Michael St. Clair(Dynamic Concepts (United States)), Christian Tate(Cornell University), Kyle Uckert(Jet Propulsion Laboratory), S. J. VanBommel(Washington University in St. Louis), Anastasia Yanchilina(Molecular Sensing (United States)), María‐Paz Zorzano(Cornell University)
Cited by 180Open Access
Abstract
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 Séítah, 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 Séítah is a unit informally named Máaz, which we interpret as lava flows or the chemical complement to Séítah 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.
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