Consolidated Chemical Provinces on Mars: Implications for Geologic Interpretations

Rani, A.; Sarbadhikari, A. Basu; Hood, D. R.; Gasnault, O.; Nambiar, S.; Karunatillake, S.

doi:10.1029/2022gl099235

Cited by 4 publications

(10 citation statements)

References 58 publications

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“…These uncertainties are based on the GRS pixel‐level uncertainties, which in turn are archived in Rani et al. (2022).…”

Section: Resultsmentioning

confidence: 99%

“…It is possible to do this via ratio‐based estimates; Baratoux et al. (2014) developed methods to estimate oxide abundances using meteoritic ratios, used in subsequent literature (e.g., Hood et al., 2016; Rani et al., 2022). However, the meteoritic ratios used by Baratoux et al.…”

Section: Methodsmentioning

confidence: 99%

“…The mass fractions of P 2 O 5 , MnO, MgO, TiO 2 and Na 2 O must then be estimated. It is possible to do this via ratio-based estimates; Baratoux et al (2014) developed methods to estimate oxide abundances using meteoritic ratios, used in subsequent literature (e.g., Hood et al, 2016;Rani et al, 2022). However, the meteoritic ratios used by Baratoux et al (2014) are not necessarily representative of the martian surface (McSween et al, 2009).…”

Section: Regional Geochemical Analysesmentioning

confidence: 99%

“…GRS-derived "chemical maps" of the martian crust cover the midlatitudes and equatorial regions, approximately spanning 50ºN to 50ºS, with a 5°× 5°J ournal of Geophysical Research: Planets 10.1029/2024JE008461 resolution. Percentage mass fractions of 9 major elements are determined to decimeter depth scales: Ca, Al, Fe, Si, K, Th, H, S and Cl (Boynton et al, 2007;Karunatillake et al, 2007;Ojha et al, 2021;Rani et al, 2022). The current updated maps are analyzed and archived by Rani et al (2022).…”

Section: Regional Geochemical Analysesmentioning

confidence: 99%

“…GRS data for the elements Ca, Al, Fe, Si, K, Th, H, S and Cl used for this work are available via Rani et al. (2022). MgO wt.% maps are available in the Georgia Institute of Technology data repository for this paper (Hughes et al., 2024).…”

Section: Data Availability Statementmentioning

confidence: 99%

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Water‐Limited Hydrothermalism and Volcanic Resurfacing of Eridania Basin, Mars

Hughes,

Wray,

Karunatillake

et al. 2024

JGR Planets

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The Eridania Basin system, located in the martian southern highlands, may have hosted long‐lived lacustrine hydrothermalism. Despite its multi‐basin scale and suggested longevity that should pervasively alter the landscape, evidence for consistent compositional signatures of lacustrine hydrothermalism across varying spatial scales is poorly known. Here we synthesize orbital data sets (derived from the Gamma Ray Spectrometer, GRS; Thermal Emission Spectrometer, TES; and Compact Reconnaissance Imaging Spectrometer for Mars, CRISM) to characterize the composition of Eridania's landscape from regional to outcrop scales. The bulk geochemistry representing decimeter depths is broadly on par with mafic igneous compositions seen elsewhere on Mars. The landscape‐scale mineralogy of Eridania suggests a compositional distinction between Eridania's northernmost basin and the remaining basins. Meanwhile, chloride mapping and analyses of amorphous silica and acid‐altered clay phases at the outcrop scale both show that mineralogical evidence for hydrothermal alteration and putative lacustrine activity is broadly limited to the northernmost basin, and that most other amorphous silica in Eridania is consistent with low‐to‐minimal water/rock weathering. This suggests either limited regional hydrothermalism or extensive mafic resurfacing occurred in Eridania, the latter of which is consistent with previous studies. Our findings collectively suggest that Eridania underwent local crystal hydrothermal alteration, perhaps confined to the northernmost basin, while much of the remainder of the Eridania's basins either experienced low‐temperature weathering or extensive resurfacing to at least meter scale depths by later volcanism. This supports prior inferences of spatially and temporally limited surface hydrology on Mars and extensive volcanic resurfacing of basins, as in the Gusev Crater.

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“…These uncertainties are based on the GRS pixel‐level uncertainties, which in turn are archived in Rani et al. (2022).…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Regional Geochemical Analysesmentioning

confidence: 99%

Section: Regional Geochemical Analysesmentioning

confidence: 99%

Section: Data Availability Statementmentioning

confidence: 99%

See 3 more Smart Citations

Water‐Limited Hydrothermalism and Volcanic Resurfacing of Eridania Basin, Mars

Hughes,

Wray,

Karunatillake

et al. 2024

JGR Planets

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Bounding the unknowns of martian crustal heat flow from a synthesis of regional geochemistry and InSight mission data

Frizzell

Ojha

Karunatillake

2023

Icarus

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The Role of Ice and Latitude‐Dependent Mantling on Boulder Distributions Across the Martian Northern Lowlands

Cohen‐Zada,

Hood,

Ewing

et al. 2024

JGR Planets

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Boulders are ubiquitous on rocky planets and provide valuable information about planetary processes. The abundance, size, and distribution of boulders offer insights into the primary processes that form them and the secondary processes that modify their position and size. However, the roles of varying environmental processes, including cryospheric processes, are poorly known. In this study, we analyze over 20 million boulders in the northern lowlands of Mars (50–70°N) to evaluate their distribution and identify environmental factors that might influence their clustering. We used spatial statistics to quantify the degree of boulder clustering across the northern plains. We found two latitudinal trends: overall decreasing clustering with increasing latitude (50–70°N) and a sub‐trend of increased clustering at higher latitudes (65–70°N). Our findings suggest that boulder distribution patterns are linked to the latitude‐dependent mantle (LDM) and subsurface ice. Boulders exhibit higher spatial clustering at higher latitudes, where the ice is thick and continuously present, and the LDM is more pristine. Lower clustering occurs at lower latitudes or regions where the ice loss is likely during interglacial periods, and the LDM degrades, exposing more boulders of varying sizes. We also discovered an anomalous region where boulder clustering is nearly random, located on the edge of the Alba Mons Patera. This area displays distinct geophysical characteristics compared to the rest of the lowlands. Although these characteristics do not indicate a specific process for the variation of boulder distribution in this study, the data suggest a coupling between cryospheric processes and boulder evolution, warranting further research.

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Consolidated Chemical Provinces on Mars: Implications for Geologic Interpretations

Cited by 4 publications

References 58 publications

Water‐Limited Hydrothermalism and Volcanic Resurfacing of Eridania Basin, Mars

Water‐Limited Hydrothermalism and Volcanic Resurfacing of Eridania Basin, Mars

Bounding the unknowns of martian crustal heat flow from a synthesis of regional geochemistry and InSight mission data

The Role of Ice and Latitude‐Dependent Mantling on Boulder Distributions Across the Martian Northern Lowlands

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