Liu, Y. and Tice, M. M. and Schmidt, M. E. and Treiman, A. H. and Kizovski, T. V. and Hurowitz, J. A. and Allwood, A. C. and Henneke, J. and Pedersen, D. A. K. and VanBommel, S. J. and Jones, M. W. M. and Knight, A. L. and Orenstein, B. J. and Clark, B. C. and Elam, W. T. and Heirwegh, C. M. and Barber, T. and Beegle, L. W. and Benzerara, K. and Bernard, S. and Beyssac, O. and Bosak, T. and Brown, A. J. and Cardarelli, E. L. and Catling, D. C. and Christian, J. R. and Cloutis, E. A. and Cohen, B. A. and Davidoff, S. and Fairén, A. G. and Farley, K. A. and Flannery, D. T. and Galvin, A. and Grotzinger, J. P. and Gupta, S. and Hall, J. and Herd, C. D. K. and Hickman-Lewis, K. and Hodyss, R. P. and Horgan, B. H. N. and Johnson, J. R. and Jørgensen, J. L. and Kah, L. C. and Maki, J. N. and Mandon, L. and Mangold, N. and McCubbin, F. M. and McLennan, S. M. and Moore, K. and Nachon, M. and Nemere, P. and Nothdurft, L. D. and Núñez, J. I. and O’Neil, L. and Quantin-Nataf, C. M. and Sautter, V. and Shuster, D. L. and Siebach, K. L. and Simon, J. I. and Sinclair, K. P. and Stack, K. M. and Steele, A. and Tarnas, J. D. and Tosca, N. J. and Uckert, K. and Udry, A. and Wade, L. A. and Weiss, B. P. and Wiens, R. C. and Williford, K. H. and Zorzano, M.-P. (2022) An olivine cumulate outcrop on the floor of Jezero crater, Mars. Science, 377 (6614). pp. 1513-1519. ISSN 0036-8075. doi:10.1126/science.abo2756. https://resolver.caltech.edu/CaltechAUTHORS:20221215-431170800.7
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Abstract
The geological units on the floor of Jezero crater, Mars, are part of a wider regional stratigraphy of olivine-rich rocks, which extends well beyond the crater. We investigated the petrology of olivine and carbonate-bearing rocks of the Séítah formation in the floor of Jezero. Using multispectral images and x-ray fluorescence data, acquired by the Perseverance rover, we performed a petrographic analysis of the Bastide and Brac outcrops within this unit. We found that these outcrops are composed of igneous rock, moderately altered by aqueous fluid. The igneous rocks are mainly made of coarse-grained olivine, similar to some martian meteorites. We interpret them as an olivine cumulate, formed by settling and enrichment of olivine through multistage cooling of a thick magma body.
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| Additional Information: | We are grateful to the Mars 2020 team members who participated in tactical and strategic science operations. Detailed comments by K. Edgett are greatly appreciated. Y.L. thanks L. P. Keszthelyi for the discussion about Earth and Mars lava flows; N. Williams for providing the base maps used in Fig. 1, A and C; and J. Bell for providing the image used in Fig. 1D. The work described in this paper was partially carried out at the Jet Propulsion Laboratory (JPL), California Institute of Technology, under a prime contract with the National Aeronautics and Space Administration (80NM0018D0004). Y.L., M.M.T., A.C.A., J.A.H., C.M.H., S.D., R.P.H., J.H., D.A.K.P., J.L.J., K.A.F., K.M.S., J.D.T., B.C.C., E.L.C., K.M., L.W.B., L.A.W., J.P.G., A.H.T., B.H.N.H., J.R.J., W.T.E., S.M.M., A.G., R.C.W., and K.U. were supported by NASA grant 80NM0018D0004 through JPL. J.R.J. was also supported by ASU subcontract 15-707. R.C.W. was also supported by NASA grant NNH13ZDA018O for Supercam to LANL. D.T.F. was supported by Australian Research Council grant DE210100205. E.A.C. was supported by Canadian Space Agency grant 19PACOI0 and Natural Sciences and Engineering Research Council of Canada grant RGPIN-2021-02995. C.D.K.H., T.V.K., and M.E.S. were supported by Canadian Space Agency M2020 Participating Scientist grants. A.U., S.J.V., B.A.C., M.N., D.L.S., J.I.S., K.L.S., T.Bo., and B.P.W. were supported by NASA Mars 2020 Participating Scientist grants. The work of K.B., S.B., O.B., L.M., N.M., C.M.Q.-N., and V.S. on Mars 2020 was supported by CNES. K.H.-L. was supported by a UK Space Agency Aurora Research Fellowship. T.Bo. was supported by the Simons Foundation Collaboration on the Origins of Life. S.G. was supported by the UK Space Agency and the Royal Society (grant SRF\R1\21000106). A.G.F. was supported by the European Research Council CoG #818602. | ||||||||||||||||||||||||||
| Group: | Division of Geological and Planetary Sciences | ||||||||||||||||||||||||||
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| Issue or Number: | 6614 | ||||||||||||||||||||||||||
| DOI: | 10.1126/science.abo2756 | ||||||||||||||||||||||||||
| Record Number: | CaltechAUTHORS:20221215-431170800.7 | ||||||||||||||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20221215-431170800.7 | ||||||||||||||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||||||||||
| ID Code: | 118387 | ||||||||||||||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||||||||||||||
| Deposited By: | Research Services Depository | ||||||||||||||||||||||||||
| Deposited On: | 18 Jan 2023 15:08 | ||||||||||||||||||||||||||
| Last Modified: | 18 Jan 2023 19:02 |
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