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The Notional Plan for Sample Collections by the Perseverance Rover for Mars Sample Return
  • +13
  • Christopher Herd,
  • Tanja Bosak,
  • Kathryn Stack,
  • Vivian Sun,
  • Sanjeev Gupta,
  • David Shuster,
  • Svetlana Shkolyar,
  • Benjamin Weiss,
  • Meenakshi Wadhwa,
  • Keyron Hickman-Lewis,
  • Sandra Siljeström,
  • Lisa Mayhew,
  • Elisabeth Hausrath,
  • Adrian Brown,
  • Kenneth Williford,
  • Kenneth Farley
Christopher Herd
Univ Alberta

Corresponding Author:[email protected]

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Tanja Bosak
MIT, Earth, Atmospheric and Planetary Sciences
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Kathryn Stack
NASA Jet Propulsion Laboratory
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Vivian Sun
Jet Propulsion Laboratory
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Sanjeev Gupta
Imperial College London
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David Shuster
University of California Berkeley
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Svetlana Shkolyar
NASA Goddard Space Flight Center
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Benjamin Weiss
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Meenakshi Wadhwa
Arizona State University
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Keyron Hickman-Lewis
Natural History Museum
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Sandra Siljeström
RISE Research Institutes of Sweden
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Lisa Mayhew
University of Colorado at Boulder
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Elisabeth Hausrath
University of Nevada Las Vegas
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Adrian Brown
Plancius Research
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Kenneth Williford
Blue Marble Space Institute of Science
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Kenneth Farley
California Institute of Technology
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The NASA Mars 2020 Perseverance rover mission will collect a suite of scientifically compelling samples for return to Earth. On the basis of orbital data, the Mars 2020 science team* identified two notional sample caches to study (1) the geology of Jezero crater, collected during the prime mission and (2) the ancient crust outside of Jezero crater, collected during a possible extended mission. Jezero crater geology consists of well-preserved, Early Hesperian to Late Noachian deltaic and lacustrine deposits sourced from a river system that drained Noachian terrain. The crater floor comprises at least two distinct units of sedimentary or volcanic origin whose relationship to the deltaic deposits is presently unclear. Remotely-sensed data reveal signatures of carbonate+olivine and clay minerals within crater floor and crater margin units. Samples from within Jezero that comprise the prime mission notional sample collection thus include: crater floor units; fine- and coarse-grained delta facies, the former with potential to preserve organic matter and/or biosignatures, the latter to possibly constrain the type and timing of sediment deposition; chemical sediments with the potential to preserve biosignatures; a sample of crater rim bedrock; and at least one sample of regolith. The region of southern Nili Planum, directly outside the western rim of Jezero crater, is geologically distinct from Jezero crater and contains diverse Early or even Pre-Noachian lithologies, that may contain records of early planetary differentiation, magnetism, paleoclimate and habitability. The notional sample collection from this region will include: layered and other basement rocks; megabreccias, which may represent blocks of (pre-)Noachian crust; basement-hosted hydrothermal fracture fill; olivine+carbonate rocks that are regionally significant and may be related to units within Jezero crater; and mafic cap unit rocks. The samples described are notional and may change with ongoing surface investigations. However, the samples we anticipate collecting align well with community priorities for Mars exploration, addressing geologic diversity, potential ancient biologic activity on Mars, planetary evolution, volatiles, and human health hazards. *Many other Mars 2020 team members were involved in this planning