Results 11 to 20 of about 9,785 (280)

A Critical Look at the Combined Use of Sulfur and Oxygen Isotopes to Study Microbial Metabolisms in Methane-Rich Environments

Frontiers in Microbiology, 2018
Separating the contributions of anaerobic oxidation of methane and organoclastic sulfate reduction in the overall sedimentary sulfur cycle of marine sediments has benefited from advances in isotope biogeochemistry.
Gilad Antler, Gilad Antler, Gilad Antler, André Pellerin   +3 more
doaj   +2 more sources

Sulfur isotopes of hydrothermal vent fossils and insights into microbial sulfur cycling within a lower Paleozoic (Ordovician-early Silurian) vent community. [PDF]

Geobiology, 2022
Symbioses between metazoans and microbes involved in sulfur cycling are integral to the ability of animals to thrive within deep-sea hydrothermal vent environments; the development of such interactions is regarded as a key adaptation in enabling animals ...
Georgieva MN, Little CTS, Herrington RJ, Boyce AJ, Zerkle AL, Maslennikov VV, EIMF, Glover AG.   +7 more
europepmc   +2 more sources

Major excursions in sulfur isotopes linked to permafrost change in Eurasia during the last 50,000 years. [PDF]

Nat Geosci
We identify a major sulfur isotope excursion in Eurasian faunal bone collagen from the last 50,000 years, here termed the Late Pleniglacial Sulfur Excursion.
Stevens RE, Reade H, Sayle KL, Tripp JA, Frémondeau D, Lister A, Barnes I, Germonpré M, Street M, Murton JB, Bottrell SH, James DH, Higham TFG.   +12 more
europepmc   +3 more sources

Geochemical transformations of sulfur in salt lakes (Transbaikalia) [PDF]

E3S Web of Conferences, 2023
The water column in brackish and saline lakes hosts various forms of sulfur including sulfide (hydrosulfide), elemental, thiosulfate, and sulfate sulfur.
Borzenko Svetlana
doaj   +1 more source

Analysis of Sulfur Isotope Composition of Gypsum Samples by Elemental Analyzer-Isotope Mass Spectrometry

Yankuang ceshi, 2020
BACKGROUND The conventional method for the measurement of sulfur isotopes in sulfate includes mainly barite conversion coupled with dual-inlet SO2 methods. These methods are facile and reliable.
GAO Jian-fei, XU Yan-ming, FAN Chang-fu, HU Bin, LI Yan-he   +4 more
doaj   +1 more source

Sulfur isotopes in Finnish nickel-copper occurrences [PDF]

Bulletin of the Geological Society of Finland, 1980
The sulfur isotope composition of the Hitura, Kotalahti and Kylmäkoski Ni-Cu ores was analyzed. The results have been compared with earlier sulfur isotope analyses of the Vammala, Laukunkangas and Oravainen Ni-Cu occurrences. Altogether 183 analyses were
H. Papunen, M. Mäkelä
doaj   +1 more source

Nature of Isomerism in Exotic Sulfur Isotopes [PDF]

Physical Review Letters, 2015
We clarify the origin of the anomalously hindered $E2$ decay from the $4^+_1$ level in $^{44}$S by performing a novel many-body analysis in the shell model. Within a unified picture about the occurrence of isomerism in neutron-rich sulfur isotopes, the $4^+_1$ state is demonstrated to be a $K=4$ isomer dominated by the two-quasiparticle configuration ...
Utsuno, Yutaka, Shimizu, Noritaka, Otsuka, Takaharu, Yoshida, Tooru, Tsunoda, Yusuke   +4 more
openaire   +3 more sources

Sulfur isotopes as biosignatures for Mars and Europa exploration [PDF]

, 2022
Sulfur (S) isotopes are used to trace metabolic pathways associated with biological S-cycling in past and present environments on Earth. These pathways (sulfate reduction, sulfur disproportionation, and sulfide oxidation) can produce unique S isotope ...
Moreras-Marti, A., Fox-Powell, M., Cousins, C. R., Zerkle, A.L., Macey, M. C.   +4 more
core   +1 more source

SQUID-SIMS is a useful approach to uncover primary signals in the Archean sulfur cycle [PDF]

, 2014
The Agouron Institute and National Aeronautic and Space Administration Exobiology Award NNX09AM91G supported this work.Many aspects of Earth's early sulfur cycle, from the origin of mass-anomalous fractionations to the degree of biological participation,
Guan, Yunbin, Woodward W. Fischer, Fike, David A., Fike, David A, Jena E. Johnson, Raub, Timothy D, David A. Fike, Fischer, Woodward W., Johnson, Jena E, Eiler, John M, Timothy D. Raub, Raub, Timothy D., Yunbin Guan, Kirschvink, Joseph L., Johnson, Jane E., Joseph L. Kirschvink, John M. Eiler, Fischer, Woodward W, Kirschvink, Joseph L, Eiler, John M.   +19 more
core   +1 more source

Fire and ice : understanding volcanic histories from sulfur isotopes in ice cores

, 2023
Reconstructing the history of explosive volcanic eruptions is important for understanding the frequency of eruptions and the climatic forcing of these events.
Crick, Laura
core   +1 more source