Christopher H. House
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View article: Oxygen isotopic evidence that Gale crater, Mars, was home to an Early Hesperian water reservoir that underwent significant evaporation
Oxygen isotopic evidence that Gale crater, Mars, was home to an Early Hesperian water reservoir that underwent significant evaporation Open
Simultaneous measurements of HDO, H 2 18 O, and H 2 16 O in water evolved during pyrolysis of powdered rock samples acquired by the Curiosity rover within Gale crater’s clay-bearing units indicate extreme and variable heavy-isotope enrichm…
View article: Slow Radiolysis of Amino Acids in Mars-Like Permafrost Conditions: Applications to the Search for Extant Life on Mars
Slow Radiolysis of Amino Acids in Mars-Like Permafrost Conditions: Applications to the Search for Extant Life on Mars Open
Future missions dedicated to the search for extant life on Mars will require a clear understanding of the organic biosignature degradation processes in the shallow icy subsurface. Galactic and solar cosmic rays constantly bombard the marti…
View article: Trace Metal and Phosphorus Enrichments in Cyanobacteria Cells and Cyanobacterial Precipitated Minerals
Trace Metal and Phosphorus Enrichments in Cyanobacteria Cells and Cyanobacterial Precipitated Minerals Open
The enrichment of trace metals and other life-essential elements, like phosphorus, in carbonates may be a signature of microbial life. Enrichments of such elements in microbial carbonate facies in the rock record have been attributed to li…
View article: Long-chain alkanes preserved in a Martian mudstone
Long-chain alkanes preserved in a Martian mudstone Open
Organic molecules preserved in ancient Martian rocks provide a critical record of the past habitability of Mars and could be chemical biosignatures. Experiments conducted by the Sample Analysis at Mars instrument onboard the Curiosity rove…
View article: Abundant ammonia and nitrogen-rich soluble organic matter in samples from asteroid (101955) Bennu
Abundant ammonia and nitrogen-rich soluble organic matter in samples from asteroid (101955) Bennu Open
Organic matter in meteorites reveals clues about early Solar System chemistry and the origin of molecules important to life, but terrestrial exposure complicates interpretation. Samples returned from the B-type asteroid Bennu by the Origin…
View article: Environmental Changes Recorded in Sedimentary Rocks in the Clay‐Sulfate Transition Region in Gale Crater, Mars: Results From the Sample Analysis at Mars‐Evolved Gas Analysis Instrument Onboard the Mars Science Laboratory <i>Curiosity</i> Rover
Environmental Changes Recorded in Sedimentary Rocks in the Clay‐Sulfate Transition Region in Gale Crater, Mars: Results From the Sample Analysis at Mars‐Evolved Gas Analysis Instrument Onboard the Mars Science Laboratory <i>Curiosity</i> Rover Open
The Curiosity rover explored the region between the orbitally defined phyllosilicate‐bearing Glen Torridon trough and the overlying layered sulfate‐bearing unit, called the “clay‐sulfate transition region.” Samples were drilled from the to…
View article: Highly enriched carbon and oxygen isotopes in carbonate-derived CO <sub>2</sub> at Gale crater, Mars
Highly enriched carbon and oxygen isotopes in carbonate-derived CO <sub>2</sub> at Gale crater, Mars Open
Carbonate minerals are of particular interest in paleoenvironmental research as they are an integral part of the carbon and water cycles, both of which are relevant to habitability. Given that these cycles are less constrained on Mars than…
View article: Prebiotic thiol-catalyzed thioamide bond formation
Prebiotic thiol-catalyzed thioamide bond formation Open
Thioamide bonds are important intermediates in prebiotic chemistry. In cyanosulfidic prebiotic chemistry, they serve as crucial intermediates in the pathways that lead to the formation of many important biomolecules (e.g., amino acids). Th…
View article: Radiolytic Effects on Biological and Abiotic Amino Acids in Shallow Subsurface Ices on Europa and Enceladus
Radiolytic Effects on Biological and Abiotic Amino Acids in Shallow Subsurface Ices on Europa and Enceladus Open
Europa and Enceladus are key targets to search for evidence of life in our solar system. However, the surface and shallow subsurface of both airless icy moons are constantly bombarded by ionizing radiation that could degrade chemical biosi…
View article: RETRACTED: Sturtz, M.; House, C. Metal Catalysis Acting on Nitriles in Early Earth Hydrothermal Systems. Life 2023, 13, 1524
RETRACTED: Sturtz, M.; House, C. Metal Catalysis Acting on Nitriles in Early Earth Hydrothermal Systems. Life 2023, 13, 1524 Open
The Life Editorial Office retracts the article, “Metal Catalysis Acting on Nitriles in Early Earth Hydrothermal Systems” [...]
View article: Extracting Meaningful Environmental and Age Information From a c. 2.4–2.2 Ga Peritidal Phosphorite: The Turee Creek Group, Western Australia
Extracting Meaningful Environmental and Age Information From a c. 2.4–2.2 Ga Peritidal Phosphorite: The Turee Creek Group, Western Australia Open
Phosphorites can record oceanic conditions during their deposition, but the faithful retention of primary information in Paleoproterozoic deposits can be mitigated by post‐depositional processes. Here, we examine a peritidal phosphorite wi…
View article: THE AMAPARI MARKER BAND, GALE CRATER, MARS: METAL ENRICHMENTS AND POTENTIAL MECHANISMS OF FORMATION
THE AMAPARI MARKER BAND, GALE CRATER, MARS: METAL ENRICHMENTS AND POTENTIAL MECHANISMS OF FORMATION Open
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View article: Low effective ultraviolet exposure ages for organics at the surface of Enceladus
Low effective ultraviolet exposure ages for organics at the surface of Enceladus Open
The saturnian moon Enceladus presents a remarkable opportunity in our solar system for searching for evidence of life, given its habitable ocean and plume that deposits organic-bearing ocean material onto the surface. Organic ocean materia…
View article: Tunable Laser Spectrometers for Planetary Science
Tunable Laser Spectrometers for Planetary Science Open
Distinguishing planetary formation and evolution pathways and understanding the origins of volatiles on planetary bodies requires determination of relative abundances and isotope ratios in the noble gases, and also of the isotope ratios in…
View article: Observations of Elemental Composition of Enceladus Consistent with Generalized Models of Theoretical Ecosystems
Observations of Elemental Composition of Enceladus Consistent with Generalized Models of Theoretical Ecosystems Open
Recent analysis of data from the Cassini Cosmic Dust Analyzer confirm geochemical modeling work that shows that the ocean of Enceladus contains considerable quantities of inorganic phosphorus as well as ammonium [55]. Technological advance…
View article: Distinctive microfossil supports early Paleoproterozoic rise in complex cellular organisation
Distinctive microfossil supports early Paleoproterozoic rise in complex cellular organisation Open
The great oxidation event (GOE), ~2.4 billion years ago, caused fundamental changes to the chemistry of Earth's surface environments. However, the effect of these changes on the biosphere is unknown, due to a worldwide lack of well‐preserv…
View article: Manganese-Iron Phosphate Nodules at the Groken Site, Gale Crater, Mars
Manganese-Iron Phosphate Nodules at the Groken Site, Gale Crater, Mars Open
The MSL Curiosity rover investigated dark, Mn-P-enriched nodules in shallow lacustrine/fluvial sediments at the Groken site in Glen Torridon, Gale Crater, Mars. Applying all relevant information from the rover, the nodules are interpreted …
View article: RETRACTED: Metal Catalysis Acting on Nitriles in Early Earth Hydrothermal Systems
RETRACTED: Metal Catalysis Acting on Nitriles in Early Earth Hydrothermal Systems Open
Hydrothermal systems are areas in which heated fluids and organic molecules rush through basaltic material rich in metals and minerals. By studying malononitrile and acetonitrile, we examine the effects of metal and mineral nanoparticles o…
View article: Sedimentary Organics in Glen Torridon, Gale Crater, Mars: Results From the SAM Instrument Suite and Supporting Laboratory Analyses
Sedimentary Organics in Glen Torridon, Gale Crater, Mars: Results From the SAM Instrument Suite and Supporting Laboratory Analyses Open
The Sample Analysis at Mars (SAM) suite instrument on board NASA's Curiosity rover has characterized the inorganic and organic chemical composition of seven samples from the Glen Torridon (GT) clay‐bearing unit. A variety of organic molecu…
View article: Reply to Schoell: Implications of a temperature trend in methane evolved from Cumberland during Mars evolved gas analyses experiments
Reply to Schoell: Implications of a temperature trend in methane evolved from Cumberland during Mars evolved gas analyses experiments Open
Microbial communities are found throughout the biosphere, from human guts to glaciers, from soil to activated sludge. Understanding the statistical properties of such diverse communities can pave the way to elucidate the common mechanisms …
View article: Organic carbon concentrations in 3.5-billion-year-old lacustrine mudstones of Mars
Organic carbon concentrations in 3.5-billion-year-old lacustrine mudstones of Mars Open
The Sample Analysis at Mars instrument stepped combustion experiment on a Yellowknife Bay mudstone at Gale crater, Mars revealed the presence of organic carbon of Martian and meteoritic origins. The combustion experiment was designed to ac…
View article: 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
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 Open
Evolved gas analysis (EGA) data from the Sample Analysis at Mars (SAM) instrument suite indicated Fe‐rich smectite, carbonate, oxidized organics, Fe/Mg sulfate, and chloride in sedimentary rocks from the Glen Torridon (GT) region of Gale c…