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Cited by 30Planetary Science and ExplorationAstro and Planetary ScienceGeochemistry and Elemental Analysis

Major Volatiles Evolved From Eolian Materials in Gale Crater

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Stern, Jennifer C., Sutter, Brad, Archer, P. Douglas, Eigenbrode, Jennifer L., McAdam, Amy C., Franz, Heather B., Knudson, Christine, Ming, Douglas W. +6 more·2018·Geophysical Research Letters
DOI 10.1029/2018gl079059
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Abstract

The Sample Analysis at Mars on the Curiosity rover analyzed the major volatile content of four eolian samples at three locations in Gale crater. The Rocknest sample was taken from an inactive sand shadow with a significant component of dust‐sized grains, while Gobabeb and Ogunquit Beach samples were taken from different locations in the Bagnold Dune field and had dust‐free, fine sand sized grains. All eolian samples possessed more oxychlorine, carbon, and nitrate relative to sedimentary materials in Gale crater. Evolved CO 2 above 450 °C was consistent with ~0.7 and ~0.4 wt. % carbonate in the Bagnold Dunes and Rocknest materials, respectively, with a regional source inside Gale crater. The fine‐grained phase of Rocknest was enriched in adsorbed water and perhaps in Fe sulfate and Fe nitrate/nitrite compared to coarser Bagnold materials and was estimated to contain up to ~0.1 wt. % of organic carbon.

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  • Perchlorate is widely distributed across the Martian surface at concentrations of 1.5-5 g kg-1.

    “Perchlorate is widely distributed across the Martian surface at concentrations of 1.5-5 g kg -1 (B.C. Clark & Kounaves, 2016;Hecht et al., 2009;Stern et al., 2018)”

    From Simple and effective remediation strategies of Martian perchlorates (2026) · cites this paper as Stern et al., 2018

    The Discussion reports 0.15–0.36 wt.% perchlorate-equivalent concentrations (1.5–3.6 g kg⁻¹) in eolian samples from Gale Crater, supporting part of the stated range. It does not establish a 5 g kg⁻¹ upper value or that these concentrations occur widely across the Martian surface. The table note also cautions that some of the material counted as perchlorate may be chlorate. (LLM, conf=0.88)

    Experimental — accuracy not yet measured

  • Water will be released beginning around ∼100°C, along with other volatiles below the perchlorate degradation temperature.

    “Water will be released beginning around ∼100˚C, along with other volatiles below the perchlorate degradation temperature (Stern et al., 2018).”

    From Simple and effective remediation strategies of Martian perchlorates (2026) · cites this paper as Stern et al., 2018

    The Results (page not available in our copy) report water release across approximately 200–800°C in Bagnold materials and low-temperature water release at Rocknest, but do not establish an onset around 100°C. They also report NO release at Rocknest from 150°C, below the 400–600°C range associated with oxychlorine decomposition, supporting the claim that another volatile can be released earlier. (LLM, conf=0.86)

    Experimental — accuracy not yet measured

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Research works printed but not linked: 59

  1. Achilles, C. N., Downs, R. T., Ming, D. W., Rampe, E. B., Morris, R. V., Treiman, A. H., et al. (2017). Mineralogy of an active eolian sediment from the Namib dune, Gale crater, Mars. Journal of Geophysical Research: Planets, 122, 2344-2361. https://doi.org/10.1002/2017JE005262 · DOI · Paper page
  2. Agnes, C., Erwin, D., Pierre-Yves, M., Olivier, F., Williams, A. J., Nathan, S., et al. (2017). Geochemistry of the Bagnold dune field as observed by ChemCam and comparison with other aeolian deposits at Gale Crater. Journal of Geophysical Research: Planets, 122, 2144-2162. https://doi.org/10.1002/2017JE005261 · DOI
  3. Applin, D. M., Izawa, M. R. M., Cloutis, E. A., Goltz, D., & Johnson, J. R. (2015). Oxalate minerals on Mars? Earth and Planetary Science Letters, 420, 127-139. https://doi.org/10.1016/j.epsl.2015.03.034 · DOI
  4. Archer, P. D., Franz, H. B., Sutter, B., Arevalo, R. D., Coll, P., Eigenbrode, J. L., et al. (2014). Abundances and implications of volatile-bearing species from evolved gas analysis of the Rocknest aeolian deposit, Gale Crater, Mars. Journal of Geophysical Research: Planets, 119, 237-254. https://doi.org/10.1002/2013JE004493 · DOI · Paper page
  5. Archer, P. D., Lauer, H., Ming, D., Niles, P., Morris, R., Rampe, E. & Sutter, B. (2014). Nanophase carbonates on Mars: Formation, detection, and implications, in Lunar and Planetary Science Conference, edited, p. 1075.
  6. Baker, M., Lapotre, M., Minitti, M., Newman, C., Sullivan, R., Weitz, C., et al. (2018). The Bagnold dunes in southern summer: Active sediment transport on Mars observed by the Curiosity rover. Geophysical Research Letters, 45. https://doi.org/10.1029/2018GL079040 · DOI
  7. Bandfield, J. L., Glotch, T. D., & Christensen, P. R. (2003). Spectroscopic identification of carbonate minerals in the Martian dust. Science, 301(5636), 1084-1087. https://doi.org/10.1126/science.1088054 · DOI
  8. Benner, S. A., Devine, K. G., Matveeva, L. N., & Powell, D. H. (2000). The missing organic molecules on Mars. Proceedings of the National Academy of Sciences, 97(6), 2425-2430. https://doi.org/10.1073/pnas.040539497 · DOI · Paper page
  9. Bish, D. L., Blake, D. F., Vaniman, D. T., Chipera, S. J., Morris, R. V., Ming, D. W., et al. (2013). X-ray diffraction results from Mars Science Laboratory: Mineralogy of Rocknest at Gale Crater. Science, 341(6153), 1238932. https://doi.org/10.1126/science.1238932 · DOI · Paper page
  10. Blake, D. F., Morris, R. V., Kocurek, G., Morrison, S. M., Downs, R. T., Bish, D., et al. (2013). Curiosity at Gale Crater, Mars: Characterization and analysis of the Rocknest sand shadow. Science, 341(6153), 1239505. https://doi.org/10.1126/science.1239505 · DOI · Paper page
  11. Bridges, N., Sullivan, R., Newman, C., Navarro, S., Van Beek, J., Ewing, R., et al. (2017). Martian aeolian activity at the Bagnold Dunes, Gale crater: The view from the surface and orbit. Journal of Geophysical Research: Planets, 122, 2077-2110. https://doi.org/10.1002/2017JE005263 · DOI
  12. Cannon, K., Sutter, B., Ming, D., Boynton, W., & Quinn, R. (2012). Perchlorate induced low temperature carbonate decomposition in the Mars Phoenix Thermal and Evolved Gas Analyzer (TEGA). Geophysical Research Letters, 39, L13203. https://doi.org/10.1029/2012GL051952 · DOI
  13. Carr, M. H., & Head, J. W. (2010). Geologic history of Mars. Earth and Planetary Science Letters, 294(3-4), 185-203. https://doi.org/10.1016/j.epsl.2009.06.042 · DOI
  14. Carrier, B. L., & Kounaves, S. P. (2015). The origins of perchlorate in the Martian soil. Geophysical Research Letters, 42, 3739-3745. https://doi. org/10.1002/2015GL064290 · DOI · Paper page
  15. Catling, D., Claire, M., Zahnle, K., Quinn, R., Clark, B., Hecht, M., & Kounaves, S. (2010). Atmospheric origins of perchlorate on Mars and in the Atacama. Journal of Geophysical Research, 115, E00E11. https://doi.org/10.1029/2009JE003425 · DOI
  16. Ehlmann, B. L., Edgett, K. S., Sutter, B., Achilles, C. N., Litvak, M. L., Lapotre, M. G. A., et al. (2017). Chemistry, mineralogy, and grain properties at Namib and High dunes, Bagnold dune field, Gale crater, Mars: A synthesis of curiosity rover observations. Journal of Geophysical Research: Planets, 122, 2510-2543. https://doi.org/10.1002/2017JE005267 · DOI
  17. Ehlmann, B. L., Mustard, J. F., Murchie, S. L., Poulet, F., Bishop, J. L., Brown, A. J., et al. (2008). Orbital identification of carbonate-bearing rocks on Mars. Science, 322(5909), 1828-1832. https://doi.org/10.1126/science.1164759 · DOI · Paper page
  18. Eigenbrode, J., Bower, H., & Archer Jr, P. (2014). Decarboxylation of carbon compounds as a potential source for CO 2 and CO observed by SAM at Yellowknife Bay, Gale Crater, Mars, in 45th Lunar and Planetary Science Conference, edited, p. 1605, Lunar and Planetary Institute, Houston.
  19. Eigenbrode, J. L., Summons, R. E., Steele, A., Freissinet, C., Millan, M. v., & Navarro-González, R., et al. (2018). Organic matter preserved in 3-billion-year-old mudstones at Gale crater, Mars. Science, 360(6393), 1096-1101. https://doi.org/10.1126/science.aas9185 · DOI · Paper page
  20. Franz, H. B., Trainer, M. G., Wong, M. H., Manning, H. L., Stern, J. C., Mahaffy, P. R., et al. (2014). Analytical techniques for retrieval of atmospheric composition with the quadrupole mass spectrometer of the Sample Analysis at Mars instrument suite on Mars Science Laboratory. Planetary and Space Science, 96, 99-113. https://doi.org/10.1016/j.pss.2014.03.005 · DOI
  21. Freissinet, C., Glavin, D. P., Mahaffy, P. R., Miller, K. E., Eigenbrode, J. L., Summons, R. E., et al. (2015). Organic molecules in the Sheepbed Mudstone, Gale Crater, Mars. Journal of Geophysical Research: Planets, 120, 495-514. https://doi.org/10.1002/2014JE004737 · DOI · Paper page
  22. Gilmour, I., & Pillinger, C. T. (1985). Stable carbon isotopic analysis of sedimentary organic matter by stepped combustion. Organic Geochemistry, 8(6), 421-426. https://doi.org/10.1016/0146-6380(85)90020-8 · DOI
  23. Glavin, D. P., Freissinet, C., Miller, K. E., Eigenbrode, J. L., Brunner, A. E., Buch, A., et al. (2013). Evidence for perchlorates and the origin of chlorinated hydrocarbons detected by SAM at the Rocknest aeolian deposit in Gale Crater. Journal of Geophysical Research: Planets, 118, 1955-1973. https://doi.org/10.1002/jgre.20144 · DOI
  24. Gordon, S., & Campbell, C. (1955). Differential thermal analysis of inorganic compounds. Analytical Chemistry, 27(7), 1102-1109. https://doi. org/10.1021/ac60103a018 · DOI
  25. Grotzinger, J. P., Gupta, S., Malin, M. C., Rubin, D. M., Schieber, J., Siebach, K., et al. (2015). Deposition, exhumation, and paleoclimate of an ancient lake deposit, Gale crater, Mars. Science, 350(6257), aac7575. https://doi.org/10.1126/science.aac7575 · DOI
  26. Hayward, R. K., Fenton, L. K., Titus, T. N., Colaprete, A., & Christensen, P. R. (2012). Mars global digital dune database: MC-30Rep., U.S. Geological Survey Jackson, W. A., Bohlke, J. K., Andraski, B. J., Fahlquist, L., Bexfield, L., Eckardt, F. D., et al. (2015). Global patterns and environmental controls of perchlorate and nitrate co-occurrence in arid and semi-arid environments. Geochimica et Cosmochimica Acta, 164, 502-522. https://doi. org/10.1016/j.gca.2015.05.016 · DOI
  27. Jackson, W. A., Davila, A. F., Böhlke, J. K., Sturchio, N. C., Sevanthi, R., Estrada, N., et al. (2016). Deposition, accumulation, and alteration of ClÀ, NO3À, ClO4À and ClO3À salts in a hyper-arid polar environment: Mass balance and isotopic constraints. Geochimica et Cosmochimica Acta, 182, 197-215. https://doi.org/10.1016/j.gca.2016.03.012 · DOI
  28. Keppler, F., Vigano, I., McLeod, A., Ott, U., Früchtl, M., & Röckmann, T. (2012). Ultraviolet-radiation-induced methane emissions from meteorites and the Martian atmosphere. Nature, 486(7401), 93-96. https://doi.org/10.1038/nature11203 · DOI
  29. Knudson, C., Perrett, G., McAdam, A., Campbell, J., Flannigan, E., Morris, R., et al. (2018). Investigation of mineral phase effects caused by sulfur bearing minerals in a Cumberland Simulant, using laboratory equivalents of SAM, APXS, and CheMin Mars Science Laboratory Instruments, in Lunar and Planetary Science Conference, edited, p. 2316.
  30. Lapotre, M., Ewing, R., Lamb, M., Fischer, W., Grotzinger, J., Rubin, D., et al. (2016). Large wind ripples on Mars: A record of atmospheric evolution. Science, 353(6294), 55-58. https://doi.org/10.1126/science.aaf3206 10.1029/2018GL079059 Geophysical Research Letters STERN ET AL. 10,247 · DOI
  31. Lapotre, M. G. A., & Rampe, E. B. (2018). Curiosity's investigation of the Bagnold dunes, Gale crater: Overview of the two-phase scientific campaign and introduction to the special collection. Geophysical Research Letters, 45. https://doi.org/10.1029/2018GL079032 · DOI
  32. Lasue, J., Cousin, A., Meslin, P.-Y., Mangold, N., Wiens, R. C., Berger, G., et al. (2018). Martian eolian dust probed by ChemCam. Geophysical Research Letters. https://doi.org/10.1029.2018GL079210
  33. Leshin, L. A., Mahaffy, P. R., Webster, C. R., Cabane, M., Coll, P., Conrad, P. G., et al. (2013). Volatile, isotope, and organic analysis of Martian fines with the Mars curiosity rover. Science, 341(6153), 1238937. https://doi.org/10.1126/science.1238937 · DOI · Paper page
  34. Lybrand, R. A., Bockheim, J. G., Ge, W., Graham, R. C., Hlohowskyj, S. R., Michalski, G., et al. (2016). Nitrate, perchlorate, and iodate co-occur in coastal and inland deserts on Earth. Chemical Geology, 442, 174-186. https://doi.org/10.1016/j.chemgeo.2016.05.023 · DOI
  35. Mahaffy, P. R., Webster, C., Cabane, M., Conrad, P., Coll, P., Atreya, S., et al. (2012). The sample analysis at Mars investigation and instrument suite. Space Science Reviews, 170(1-4), 401-478. https://doi.org/10.1007/s11214-012-9879-z · DOI
  36. Malespin, C. A., Freissinet, C., Glavin, D. P., Mahaffy, P. R., Millan, M., Buch, A., et al. (2018). The first complete SAM wet chemistry experiment on Mars, in 49th Lunar and Planetary Science Conference, edited, p. 2083, Lunar and Planetary Institute, Houston.
  37. Mancinelli, R. L. (1996). The search for nitrogen compounds on the surface of Mars. Advances in Space Research, 18(12), 241-248. https://doi. org/10.1016/0273-1177(96)00113-5 · DOI · Paper page
  38. McAdam, A. C., Franz, H. B., Sutter, B., Archer, P. D., Freissinet, C., Eigenbrode, J. L., et al. (2014). Sulfur-bearing phases detected by evolved gas analysis of the Rocknest aeolian deposit, Gale Crater, Mars. Journal of Geophysical Research: Planets, 119, 373-393. https://doi.org/10.1002/2013JE004518 · DOI
  39. Ming, D., Archer, P., Glavin, D., Eigenbrode, J., Franz, H., Sutter, B., et al. (2014). Volatile and organic compositions of sedimentary rocks in Yellowknife Bay, Gale crater, Mars. Science, 343(6169), 1245267. https://doi.org/10.1126/science.1245267 · DOI
  40. Minitti, M., Kah, L., Yingst, R., Edgett, K., Anderson, R., Beegle, L., et al. (2013). MAHLI at the Rocknest sand shadow: Science and science enabling activities. Journal of Geophysical Research: Planets, 118, 2338-2360. https://doi.org/10.1002/2013JE004426 · DOI
  41. Morris, R. V., Ruff, S. W., Gellert, R., Ming, D. W., Arvidson, R. E., Clark, B. C., et al. (2010). Identification of carbonate-rich outcrops on Mars by the Spirit rover. Science, 329(5990), 421-424. https://doi.org/10.1126/science.1189667 · DOI · Paper page
  42. Mu, J., & Perlmutter, D. (1982). Thermal decomposition of metal nitrates and their hydrates. Thermochimica Acta, 56(3), 253-260. https://doi. org/10.1016/0040-6031(82)87033-0 · DOI · Paper page
  43. Nachon, M., Mangold, N., Forni, O., Kah, L. C., Cousin, A., Wiens, R. C., et al. (2017). Chemistry of diagenetic features analyzed by ChemCam at Pahrump Hills, Gale crater, Mars. Icarus, 281, 121-136. https://doi.org/10.1016/j.icarus.2016.08.026 · DOI
  44. Navarro-González, R., Coll, P., Sutter, B., Stern, J., Mckay, C., Martín-Torres, F., et al. (2018). Detection of nitrites by the Sample Analysis at Mars (SAM) instrument. Implications for the oxidation state of the atmosphere, in Lunar and Planetary Science Conference, edited, p. 1754.
  45. O'Connell-Cooper, C. D., Spray, J. G., Thompson, L. M., Gellert, R., Berger, J. A., Boyd, N. I., et al. (2017). APXS derived chemistry of the Bagnold dune sands: Comparisons with Gale crater soils and the global Martian average. Journal of Geophysical Research: Planets, 122, 2623-2643. https://doi.org/10.1002/2017JE005268 · DOI
  46. Rampe, E. B., Lapotre, M., Bristow, T. F., Arvidson, R. E., Morris, R. V., Achilles, C. N., et al. (2018). Sand mineralogy within the Bagnold Dunes, Gale crater, as observed in situ and from orbit. Geophysical Research Letters, 45. https://doi.org/10.1029/2018GL079073 · DOI
  47. Rogers, A. D., & Bandfield, J. L. (2009). Mineralogical characterization of Mars Science Laboratory candidate landing sites from THEMIS and TES data. Icarus, 203(2), 437-453. https://doi.org/10.1016/j.icarus.2009.04.020 · DOI
  48. Schmidt, M. E., Campbell, J. L., Gellert, R., Perrett, G. M., Treiman, A. H., Blaney, D. L., et al. (2014). Geochemical diversity in first rocks examined by the Curiosity Rover in Gale crater: Evidence for and significance of an alkali and volatile rich igneous source. Journal of Geophysical Research: Planets, 119, 64-81. https://doi.org/10.1002/2013JE004481 · DOI
  49. Sephton, M. (2012). Pyrolysis and mass spectrometry studies of meteoritic organic matter. Mass Spectrometry Reviews, 31(5), 560-569. https://doi.org/10.1002/mas.20354 · DOI
  50. Smith, M. L., Claire, M. W., Catling, D. C., & Zahnle, K. J. (2014). The formation of sulfate, nitrate and perchlorate salts in the Martian atmosphere. Icarus, 231, 51-64. https://doi.org/10.1016/j.icarus.2013.11.031 · DOI
  51. Stern, J. C., Sutter, B., Jackson, W. A., Navarro-González, R., McKay, C. P., Ming, D. W., et al. (2017). The nitrate/(per) chlorate relationship on Mars. Geophysical Research Letters, 44, 2643-2651. https://doi.org/10.1002/2016GL072199 · DOI
  52. Sullivan, R., Arvidson, R., Bell, J. F., Gellert, R., Golombek, M., Greeley, R., et al. (2008). Wind-driven particle mobility on Mars: Insights from Mars Exploration Rover observations at El Dorado and surroundings at Gusev Crater. Journal of Geophysical Research, 113, E06S07. https://doi.org/10.1029/2008JE003101 · DOI
  53. Sullivan, R., & Kok, J. F. (2017). Aeolian saltation on Mars at low wind speeds. Journal of Geophysical Research: Planets, 122, 2111-2143. https://doi.org/10.1002/2017JE005275 · DOI
  54. Sutter, B., Boynton, W. V., Ming, D. W., Niles, P. B., Morris, R. V., Golden, D. C., et al. (2012). The detection of carbonate in the martian soil at the Phoenix landing site: A laboratory investigation and comparison with the thermal and evolved gas analyzer (TEGA) data. Icarus, 218(1), 290-296. https://doi.org/10.1016/j.icarus.2011.12.002 · DOI
  55. Sutter, B., McAdam, A. C., Mahaffy, P. R., Ming, D. W., Edgett, K. S., Rampe, E. B., et al. (2017). Evolved gas analyses of sedimentary rocks and eolian sediment in Gale Crater, Mars: Results of the Curiosity Rover's Sample Analysis at Mars (SAM) instrument from Yellowknife Bay to the Namib Dune. Journal of Geophysical Research: Planets, 122, 2574-2609. https://doi.org/10.1002/2016JE005225 · DOI · Paper page
  56. Treiman, A. H., Bish, D. L., Vaniman, D. T., Chipera, S. J., Blake, D. F., Ming, D. W., et al. (2016). Mineralogy, provenance, and diagenesis of a potassic basaltic sandstone on Mars: CheMin X-ray diffraction of the Windjana sample (Kimberley area, Gale crater). Journal of Geophysical Research: Planets, 121, 75-106. https://doi.org/10.1002/2015JE004932 · DOI
  57. Vaniman, D., Bish, D., Ming, D., Bristow, T., Morris, R., Blake, D., et al. (2014). Mineralogy of a mudstone at Yellowknife Bay, Gale crater, Mars. Science, 343(6169), 1243480. https://doi.org/10.1126/science.1243480 · DOI
  58. Weitz, C. M., Sullivan, R. J., Lapotre, M. G. A., Rowland, S. K., Grant, J. A., Baker, M., & Yingst, R. A. (2018). Sand grain sizes and shapes in Aeolian Bedforms at Gale Crater, Mars. Geophysical Research Letters, 45. https://doi.org/10.1029/2018GL078972 · DOI
  59. Wilson, E. H., Atreya, S. K., Kaiser, R. I., & Mahaffy, P. R. (2016). Perchlorate formation on Mars through surface radiolysis initiated atmospheric chemistry: A potential mechanism. Journal of Geophysical Research: Planets, 121, 1472-1487. https://doi.org/10.1002/ · DOI

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Authors
Stern, J. C., Sutter, B., Archer, P. D., Eigenbrode, J. L., McAdam, A. C., Franz, H. B., Knudson, C., Ming, D. W., Wong, G., Freissinet, C., Malespin, C. A., Navarro‐Gonzalez, R., Szopa, C., & Mahaffy, P. R.
Affiliations
  • Goddard Space Flight Center (US)
  • Johnson Space Center (US)
  • Pennsylvania State University (US)
  • Centre National de la Recherche Scientifique (FR)
  • Institito de Ciencias Nucleares Universidad Nacional Autónoma de México México City Mexico
Corresponding author
Stern, Jennifer C.
ORCID
Venue
Geophysical Research Letters
Publisher
American Geophysical Union (AGU)
Published
2018-10-12
Volume
45
Issue
19
Pages
10,240-10,248
ISSN
  • 0094-8276 (ISSN-L)
  • 1944-8007
DOI
10.1029/2018gl079059
OpenAlex
W2891292667
Cited by
30
References
2
Citations by year
2026: 5 · 2025: 3 · 2024: 3 · 2023: 1 · 2022: 4 · 2021: 5 · 2020: 1 · 2019: 2 · 2018: 6
FWCI
1.83
Type
journal article
Language
en
Open access
Licence
Locations
  • Geophysical Research Letters (publishedVersion, public-domain)
  • HAL (submittedVersion, other-oa)
Funders
National Aeronautics and Space Administration
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Planetary Science and Exploration
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astro and Planetary Science
  • Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geochemistry and Elemental Analysis
Keywords
Martian volatiles, aeolian dust, Gale Crater, Curiosity rover, Sample Analysis at Mars, carbonates, adsorbed water, organic carbon, Rocknest, Gobabeb, Mars atmosphere

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