Search Results - "McAdam, C A"
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Early diagenesis at and below Vera Rubin ridge, Gale crater, Mars
Published in Meteoritics & planetary science (01-10-2021)“…Data returned by NASA’s Mars Science Laboratory Curiosity rover showed evidence for abundant secondary materials, including Fe‐oxides, phyllosilicates, and an…”
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A Two‐Step K‐Ar Experiment on Mars: Dating the Diagenetic Formation of Jarosite from Amazonian Groundwaters
Published in Journal of geophysical research. Planets (01-12-2017)“…Following K‐Ar dating of a mudstone and a sandstone, a third sample has been dated by the Curiosity rover exploring Gale Crater. The Mojave 2 mudstone, which…”
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Indigenous and exogenous organics and surface–atmosphere cycling inferred from carbon and oxygen isotopes at Gale crater
Published in Nature astronomy (01-05-2020)“…Since landing at Gale crater, Mars, in August 2012, the Curiosity rover has searched for evidence of past habitability, such as organic compounds, which have…”
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In Situ Analysis of Opal in Gale Crater, Mars
Published in Journal of geophysical research. Planets (01-08-2018)“…Silica enrichments resulting in up to ~90 wt% SiO2 have been observed by the Curiosity rover's instruments in Gale crater, Mars, within the Murray and Stimson…”
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Brine-driven destruction of clay minerals in Gale crater, Mars
Published in Science (American Association for the Advancement of Science) (09-07-2021)“…Sedimentary rocks exposed in Gale crater on Mars contain extensive clay minerals. Bristow et al. analyzed drill samples collected by the Curiosity rover as it…”
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Sand Mineralogy Within the Bagnold Dunes, Gale Crater, as Observed In Situ and From Orbit
Published in Geophysical research letters (28-09-2018)“…Curiosity investigated active eolian sands near linear dunes during Phase 2 of the Bagnold Dunes campaign in Gale crater, Mars. Ogunquit Beach, a sample…”
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Evolved Gas Analyses of Sedimentary Rocks From the Glen Torridon Clay‐Bearing Unit, Gale Crater, Mars: Results From the Mars Science Laboratory Sample Analysis at Mars Instrument Suite
Published in Journal of geophysical research. Planets (01-09-2022)“…Evolved gas analysis (EGA) data from the Sample Analysis at Mars (SAM) instrument suite indicated Fe‐rich smectite, carbonate, oxidized organics, Fe/Mg…”
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Evolved Gas Analyses of Sedimentary Rocks and Eolian Sediment in Gale Crater, Mars: Results of the Curiosity Rover's Sample Analysis at Mars Instrument from Yellowknife Bay to the Namib Dune
Published in Journal of geophysical research. Planets (01-12-2017)“…The sample analysis at Mars instrument evolved gas analyzer (SAM-EGA) has detected evolved water, H2, SO2, H2S, NO, CO2, CO, O2, and HCl from two eolian…”
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Metagenome-Assembled Genome of a Putative Chemoheterotroph from Volcanic Terrain in Hawaii
Published in Microbiology resource announcements (17-11-2022)“…Here, we present the draft genome for a new putative species, Gaiellasilicea maunaloa, most closely related to Gaiella occulta, within the phylum This group…”
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Basaltic Lava Tube Hosts a Putative Novel Genus in the Family Solirubrobacteraceae
Published in Microbiology resource announcements (20-10-2022)“…We report the draft genome sequence of a putative new genus and species, Siliceabacter maunaloa, in the family Solirubrobacteraceae. The members of this family…”
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Sedimentary Organics in Glen Torridon, Gale Crater, Mars: Results From the SAM Instrument Suite and Supporting Laboratory Analyses
Published in Journal of geophysical research. Planets (01-11-2022)“…The Sample Analysis at Mars (SAM) suite instrument on board NASA's Curiosity rover has characterized the inorganic and organic chemical composition of seven…”
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Extreme Niche Partitioning and Microbial Dark Matter in a Mauna Loa Lava Tube
Published in Journal of geophysical research. Planets (01-06-2023)“…Lava tubes are key targets in the search for life on Mars. Their basaltic walls provide protection from radiation and changing environmental conditions, which…”
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Pyrolysis of Oxalate, Acetate, and Perchlorate Mixtures and the Implications for Organic Salts on Mars
Published in Journal of geophysical research. Planets (01-04-2021)“…Organic salts, such as Fe, Ca, and Mg oxalates and acetates, may be widespread radiolysis and oxidation products of organic matter in Martian surface…”
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Diagnostic biosignature transformation under simulated martian radiation in organic-rich sedimentary rocks
Published in Frontiers in astronomy and space sciences (08-08-2022)“…As we look for traces of ancient life on Mars, we need to consider the impact of ionizing radiation in the biosignature preservation process. Here, we…”
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Life Underground: Investigating Microbial Communities and Their Biomarkers in Mars‐Analog Lava Tubes at Craters of the Moon National Monument and Preserve
Published in Journal of geophysical research. Planets (01-11-2022)“…Craters of the Moon National Monument and Preserve (CotM) is a strong terrestrial analog for lava tube formations on Mars. The commonality of its basalt…”
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Constraining Alteration Processes Along the Siccar Point Group Unconformity, Gale Crater, Mars: Results From the Sample Analysis at Mars Instrument
Published in Journal of geophysical research. Planets (01-11-2022)“…Results from the Sample Analysis at Mars‐evolved gas analyzer on board the Mars Science Laboratory Curiosity rover constrained the alteration history and…”
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Magnesium Sulfate as a Key Mineral for the Detection of Organic Molecules on Mars Using Pyrolysis
Published in Journal of geophysical research. Planets (01-01-2016)“…Pyrolysis of soil or rock samples is the preferred preparation technique used on Mars to search for organic molecules up today. During pyrolysis, oxichlorines…”
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The Incorporation of Field Portable Instrumentation Into Human Planetary Surface Exploration
Published in Earth and space science (Hoboken, N.J.) (01-11-2018)“…Field portable instrumentation, such as in situ geochemical analyzers or broader field of view instruments like multispectral imagers or other imaging…”
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Spectroscopic comparisons of two different terrestrial basaltic environments: Exploring the correlation between nitrogen compounds and biomolecular signatures
Published in Icarus (New York, N.Y. 1962) (15-09-2023)“…Life detection in the solar system relies on the unambiguous identification of signatures of life and habitability. Organic molecules are essential to life as…”
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Psychosis and substance abuse: cause, effect or coincidence?
Published in Scottish medical journal (01-12-1995)“…An association between substance abuse and major psychiatric illness is increasingly well recognised, but most studies have been conducted in the USA and have…”
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