Diagenesis of Vera Rubin Ridge, Gale Crater, Mars, From Mastcam Multispectral Images

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Diagenesis of Vera Rubin Ridge, Gale Crater, Mars, From Mastcam Multispectral Images. / Horgan, Briony H.N.; Johnson, Jeffrey R.; Fraeman, Abigail A.; Rice, Melissa S.; Seeger, Christina; Bell, James F.; Bennett, Kristen A.; Cloutis, Edward A.; Edgar, Lauren A.; Frydenvang, Jens; Grotzinger, John P.; L'Haridon, Jonas; Jacob, Samantha R.; Mangold, Nicolas; Rampe, Elizabeth B.; Rivera-Hernandez, Frances; Sun, Vivian Z.; Thompson, Lucy M.; Wellington, Danika.

In: Journal of Geophysical Research: Planets, Vol. 125, No. 11, e2019JE006322, 11.2020.

Research output: Contribution to journalJournal articleResearchpeer-review

Harvard

Horgan, BHN, Johnson, JR, Fraeman, AA, Rice, MS, Seeger, C, Bell, JF, Bennett, KA, Cloutis, EA, Edgar, LA, Frydenvang, J, Grotzinger, JP, L'Haridon, J, Jacob, SR, Mangold, N, Rampe, EB, Rivera-Hernandez, F, Sun, VZ, Thompson, LM & Wellington, D 2020, 'Diagenesis of Vera Rubin Ridge, Gale Crater, Mars, From Mastcam Multispectral Images', Journal of Geophysical Research: Planets, vol. 125, no. 11, e2019JE006322. https://doi.org/10.1029/2019JE006322

APA

Horgan, B. H. N., Johnson, J. R., Fraeman, A. A., Rice, M. S., Seeger, C., Bell, J. F., ... Wellington, D. (2020). Diagenesis of Vera Rubin Ridge, Gale Crater, Mars, From Mastcam Multispectral Images. Journal of Geophysical Research: Planets, 125(11), [e2019JE006322]. https://doi.org/10.1029/2019JE006322

Vancouver

Horgan BHN, Johnson JR, Fraeman AA, Rice MS, Seeger C, Bell JF et al. Diagenesis of Vera Rubin Ridge, Gale Crater, Mars, From Mastcam Multispectral Images. Journal of Geophysical Research: Planets. 2020 Nov;125(11). e2019JE006322. https://doi.org/10.1029/2019JE006322

Author

Horgan, Briony H.N. ; Johnson, Jeffrey R. ; Fraeman, Abigail A. ; Rice, Melissa S. ; Seeger, Christina ; Bell, James F. ; Bennett, Kristen A. ; Cloutis, Edward A. ; Edgar, Lauren A. ; Frydenvang, Jens ; Grotzinger, John P. ; L'Haridon, Jonas ; Jacob, Samantha R. ; Mangold, Nicolas ; Rampe, Elizabeth B. ; Rivera-Hernandez, Frances ; Sun, Vivian Z. ; Thompson, Lucy M. ; Wellington, Danika. / Diagenesis of Vera Rubin Ridge, Gale Crater, Mars, From Mastcam Multispectral Images. In: Journal of Geophysical Research: Planets. 2020 ; Vol. 125, No. 11.

Bibtex

@article{13bdcda8f65c453bb4fb6b5bc9ac421f,
title = "Diagenesis of Vera Rubin Ridge, Gale Crater, Mars, From Mastcam Multispectral Images",
abstract = "Images from the Mars Science Laboratory (MSL) mission of lacustrine sedimentary rocks of Vera Rubin ridge on “Mt. Sharp” in Gale crater, Mars, have shown stark color variations from red to purple to gray. These color differences crosscut stratigraphy and are likely due to diagenetic alteration of the sediments after deposition. However, the chemistry and timing of these fluid interactions is unclear. Determining how diagenetic processes may have modified chemical and mineralogical signatures of ancient Martian environments is critical for understanding the past habitability of Mars and achieving the goals of the MSL mission. Here we use visible/near-infrared spectra from Mastcam and ChemCam to determine the mineralogical origins of color variations in the ridge. Color variations are consistent with changes in spectral properties related to the crystallinity, grain size, and texture of hematite. Coarse-grained gray hematite spectrally dominates in the gray patches and is present in the purple areas, while nanophase and fine-grained red crystalline hematite are present and spectrally dominate in the red and purple areas. We hypothesize that these differences were caused by grain-size coarsening of hematite by diagenetic fluids, as observed in terrestrial analogs. In this model, early primary reddening by oxidizing fluids near the surface was followed during or after burial by bleaching to form the gray patches, possibly with limited secondary reddening after exhumation. Diagenetic alteration may have diminished the preservation of biosignatures and changed the composition of the sediments, making it more difficult to interpret how conditions evolved in the paleolake over time.",
keywords = "diagenesis, Mars, mineralogy, spectroscopy",
author = "Horgan, {Briony H.N.} and Johnson, {Jeffrey R.} and Fraeman, {Abigail A.} and Rice, {Melissa S.} and Christina Seeger and Bell, {James F.} and Bennett, {Kristen A.} and Cloutis, {Edward A.} and Edgar, {Lauren A.} and Jens Frydenvang and Grotzinger, {John P.} and Jonas L'Haridon and Jacob, {Samantha R.} and Nicolas Mangold and Rampe, {Elizabeth B.} and Frances Rivera-Hernandez and Sun, {Vivian Z.} and Thompson, {Lucy M.} and Danika Wellington",
year = "2020",
month = "11",
doi = "10.1029/2019JE006322",
language = "English",
volume = "125",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "11",

}

RIS

TY - JOUR

T1 - Diagenesis of Vera Rubin Ridge, Gale Crater, Mars, From Mastcam Multispectral Images

AU - Horgan, Briony H.N.

AU - Johnson, Jeffrey R.

AU - Fraeman, Abigail A.

AU - Rice, Melissa S.

AU - Seeger, Christina

AU - Bell, James F.

AU - Bennett, Kristen A.

AU - Cloutis, Edward A.

AU - Edgar, Lauren A.

AU - Frydenvang, Jens

AU - Grotzinger, John P.

AU - L'Haridon, Jonas

AU - Jacob, Samantha R.

AU - Mangold, Nicolas

AU - Rampe, Elizabeth B.

AU - Rivera-Hernandez, Frances

AU - Sun, Vivian Z.

AU - Thompson, Lucy M.

AU - Wellington, Danika

PY - 2020/11

Y1 - 2020/11

N2 - Images from the Mars Science Laboratory (MSL) mission of lacustrine sedimentary rocks of Vera Rubin ridge on “Mt. Sharp” in Gale crater, Mars, have shown stark color variations from red to purple to gray. These color differences crosscut stratigraphy and are likely due to diagenetic alteration of the sediments after deposition. However, the chemistry and timing of these fluid interactions is unclear. Determining how diagenetic processes may have modified chemical and mineralogical signatures of ancient Martian environments is critical for understanding the past habitability of Mars and achieving the goals of the MSL mission. Here we use visible/near-infrared spectra from Mastcam and ChemCam to determine the mineralogical origins of color variations in the ridge. Color variations are consistent with changes in spectral properties related to the crystallinity, grain size, and texture of hematite. Coarse-grained gray hematite spectrally dominates in the gray patches and is present in the purple areas, while nanophase and fine-grained red crystalline hematite are present and spectrally dominate in the red and purple areas. We hypothesize that these differences were caused by grain-size coarsening of hematite by diagenetic fluids, as observed in terrestrial analogs. In this model, early primary reddening by oxidizing fluids near the surface was followed during or after burial by bleaching to form the gray patches, possibly with limited secondary reddening after exhumation. Diagenetic alteration may have diminished the preservation of biosignatures and changed the composition of the sediments, making it more difficult to interpret how conditions evolved in the paleolake over time.

AB - Images from the Mars Science Laboratory (MSL) mission of lacustrine sedimentary rocks of Vera Rubin ridge on “Mt. Sharp” in Gale crater, Mars, have shown stark color variations from red to purple to gray. These color differences crosscut stratigraphy and are likely due to diagenetic alteration of the sediments after deposition. However, the chemistry and timing of these fluid interactions is unclear. Determining how diagenetic processes may have modified chemical and mineralogical signatures of ancient Martian environments is critical for understanding the past habitability of Mars and achieving the goals of the MSL mission. Here we use visible/near-infrared spectra from Mastcam and ChemCam to determine the mineralogical origins of color variations in the ridge. Color variations are consistent with changes in spectral properties related to the crystallinity, grain size, and texture of hematite. Coarse-grained gray hematite spectrally dominates in the gray patches and is present in the purple areas, while nanophase and fine-grained red crystalline hematite are present and spectrally dominate in the red and purple areas. We hypothesize that these differences were caused by grain-size coarsening of hematite by diagenetic fluids, as observed in terrestrial analogs. In this model, early primary reddening by oxidizing fluids near the surface was followed during or after burial by bleaching to form the gray patches, possibly with limited secondary reddening after exhumation. Diagenetic alteration may have diminished the preservation of biosignatures and changed the composition of the sediments, making it more difficult to interpret how conditions evolved in the paleolake over time.

KW - diagenesis

KW - Mars

KW - mineralogy

KW - spectroscopy

U2 - 10.1029/2019JE006322

DO - 10.1029/2019JE006322

M3 - Journal article

AN - SCOPUS:85091623493

VL - 125

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - 11

M1 - e2019JE006322

ER -

ID: 252406115