Matches in SemOpenAlex for { <https://semopenalex.org/work/W4237900675> ?p ?o ?g. }
Showing items 1 to 72 of
72
with 100 items per page.
- W4237900675 endingPage "379" @default.
- W4237900675 startingPage "373" @default.
- W4237900675 abstract "In this study, we present quadruple sulfur isotope values (QSI: 32S,33S,34S,36S) measured in sediments from two sulfur-rich Mars analogue environments: i) the glacially-fed hydrothermal pools in Iceland (Kerlingarfjöll and Kverkfjöll), and ii) the Lost Hammer hypersaline spring from Axel Heiberg Island, Nunavut, Canada. The localities host different physical and geochemical characteristics, including aqueous geochemistry, volcanic input, temperature, pH and salinity. The δ34S values of sulfur compounds from the Lost Hammer hypersaline spring exhibit large fractionations typical of microbial sulfate reduction (MSR) with or without additional oxidative sulfur cycling and microbial sulfur disproportionation (MSD) (34εSO4-CRS from −49.5 to −43.5‰), contrary to the small S isotope fractionations reported for the Icelandic hydrothermal sites (34εSO4-CRS from −9.9 to −0.7‰). Lost Hammer minor S isotope values (Δ33S and Δ36S), interpreted within the context of a sulfur cycling box model, are consistent with a biogeochemical S cycle including both MSR and MSD. In contrast, the small range in δ34S values within the Iceland hydrothermal pools are consistent with a large volcanic H2S flux and minimal biological S cycling. The minor S isotope values recorded in the hydrothermal pools, however, indicate further biogeochemical sulfur cycling. Our results demonstrate that contrasting physical and chemical characteristics between sites support different microbial S cycling processes, as recorded in the QSI sedimentary values. The QSI data and the derived models support the strong potential for QSI values to be used as biosignatures in the search for life in Martian S-rich environments. These results also suggests that extreme, metabolic energy-limited environments with low abiotic sulfur fluxes could be more likely to produce unequivocal biological QSI signals than those with more moderate conditions or abundant available energy. This finding carries significant implications for targeting sites on Mars for in situ measurements or future sample return missions." @default.
- W4237900675 created "2022-05-12" @default.
- W4237900675 creator A5011600750 @default.
- W4237900675 date "1987-01-01" @default.
- W4237900675 modified "2023-09-24" @default.
- W4237900675 title "International organizations news" @default.
- W4237900675 doi "https://doi.org/10.1016/0277-9390(87)90079-3" @default.
- W4237900675 hasPublicationYear "1987" @default.
- W4237900675 type Work @default.
- W4237900675 citedByCount "0" @default.
- W4237900675 crossrefType "journal-article" @default.
- W4237900675 hasAuthorship W4237900675A5011600750 @default.
- W4237900675 hasConcept C107872376 @default.
- W4237900675 hasConcept C127313418 @default.
- W4237900675 hasConcept C127636831 @default.
- W4237900675 hasConcept C151730666 @default.
- W4237900675 hasConcept C156622251 @default.
- W4237900675 hasConcept C166957645 @default.
- W4237900675 hasConcept C17409809 @default.
- W4237900675 hasConcept C178790620 @default.
- W4237900675 hasConcept C185592680 @default.
- W4237900675 hasConcept C1965285 @default.
- W4237900675 hasConcept C205649164 @default.
- W4237900675 hasConcept C2776152364 @default.
- W4237900675 hasConcept C2778343803 @default.
- W4237900675 hasConcept C2779343474 @default.
- W4237900675 hasConcept C2780416900 @default.
- W4237900675 hasConcept C518881349 @default.
- W4237900675 hasConcept C541528975 @default.
- W4237900675 hasConcept C6494504 @default.
- W4237900675 hasConcept C71915725 @default.
- W4237900675 hasConcept C74826761 @default.
- W4237900675 hasConceptScore W4237900675C107872376 @default.
- W4237900675 hasConceptScore W4237900675C127313418 @default.
- W4237900675 hasConceptScore W4237900675C127636831 @default.
- W4237900675 hasConceptScore W4237900675C151730666 @default.
- W4237900675 hasConceptScore W4237900675C156622251 @default.
- W4237900675 hasConceptScore W4237900675C166957645 @default.
- W4237900675 hasConceptScore W4237900675C17409809 @default.
- W4237900675 hasConceptScore W4237900675C178790620 @default.
- W4237900675 hasConceptScore W4237900675C185592680 @default.
- W4237900675 hasConceptScore W4237900675C1965285 @default.
- W4237900675 hasConceptScore W4237900675C205649164 @default.
- W4237900675 hasConceptScore W4237900675C2776152364 @default.
- W4237900675 hasConceptScore W4237900675C2778343803 @default.
- W4237900675 hasConceptScore W4237900675C2779343474 @default.
- W4237900675 hasConceptScore W4237900675C2780416900 @default.
- W4237900675 hasConceptScore W4237900675C518881349 @default.
- W4237900675 hasConceptScore W4237900675C541528975 @default.
- W4237900675 hasConceptScore W4237900675C6494504 @default.
- W4237900675 hasConceptScore W4237900675C71915725 @default.
- W4237900675 hasConceptScore W4237900675C74826761 @default.
- W4237900675 hasIssue "3" @default.
- W4237900675 hasLocation W42379006751 @default.
- W4237900675 hasOpenAccess W4237900675 @default.
- W4237900675 hasPrimaryLocation W42379006751 @default.
- W4237900675 hasRelatedWork W1566983389 @default.
- W4237900675 hasRelatedWork W2038553215 @default.
- W4237900675 hasRelatedWork W2053989893 @default.
- W4237900675 hasRelatedWork W2085980204 @default.
- W4237900675 hasRelatedWork W2086031805 @default.
- W4237900675 hasRelatedWork W2204676806 @default.
- W4237900675 hasRelatedWork W2593007083 @default.
- W4237900675 hasRelatedWork W2769163663 @default.
- W4237900675 hasRelatedWork W2963058833 @default.
- W4237900675 hasRelatedWork W4293582070 @default.
- W4237900675 hasVolume "14" @default.
- W4237900675 isParatext "false" @default.
- W4237900675 isRetracted "false" @default.
- W4237900675 workType "article" @default.