Results 21 to 30 of about 20,684 (285)

High sulfur isotope fractionation associated with anaerobic oxidation of methane in a low sulfate, iron rich environment

Frontiers in Earth Science, 2016
Sulfur isotope signatures provide key information for the study of microbial activity in modern systems and the evolution of the Earth surface redox system.
Hannah Sophia Weber, Bo eThamdrup, Kirsten Silvia Habicht, Kirsten Silvia Habicht   +3 more
doaj   +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

Sulfur isotope signatures of sulfides from the Khibina and Lovozero massifs (Kola Alkaline Province, Fennoscandian Shield)

Vestnik MGTU, 2021
The sulfur isotope geochemistry of the Khibina and Lovozero agpaitic massifs provides an opportunity to understand the role of plume-lithosphere interaction processes responsible for the Paleozoic alkaline igneous activity in the north-eastern part of ...
Huber M, Mokrushin A. V.
doaj   +1 more source

Sulphur isotope geochemistry of black shale-hosted antimony mineralization, Arnsberg, northern Rhenish Massif, Germany [PDF]

, 2003
Vein-type and bedding-concordant mesothermal (180–410 °C) stibnite–sulphosalt mineralization at Arnsberg, NE Rhenish Massif, Germany, is hosted by Carboniferous pyrite-rich black shales and siliceous limestones.
Wagner, T., Boyce, A.J.
core   +1 more source

Fire and brimstone: the microbially mediated formation of elemental sulfur nodules from an isotope and major element study in the paleo-Dead Sea.

PLoS ONE, 2013
We present coupled sulfur and oxygen isotope data from sulfur nodules and surrounding gypsum, as well as iron and manganese concentration data, from the Lisan Formation near the Dead Sea (Israel).
Tom Bishop, Alexandra V Turchyn, Orit Sivan   +2 more
doaj   +1 more source

Constraining the rise of oxygen with oxygen isotopes

Nature Communications, 2019
The loss of anomalous sulfur isotope compositions from sedimentary rocks has been considered a symptom of permanent atmospheric oxygenation. Here the authors show sulfur and oxygen isotope evidence from 
B. A. Killingsworth, P. Sansjofre, P. Philippot, P. Cartigny, C. Thomazo, S. V. Lalonde   +5 more
doaj   +1 more source

Oxygen Isotopes and Volatiles in Martian Meteorite [PDF]

, 2013
Oxygen isotopes were measured in mineral separates from martian meteorites using laser fluorination and were found to be remarkably uniform in both δ18O and Δ17O, suggesting that martian magmas did not assimilate aqueously altered crust regardless of any
Channon, Melanie Beth
core   +1 more source

Carbon and sulfur isotope biosignatures in Mars-analogue hydrothermal environments [PDF]

, 2023
The study of terrestrial environments that bear similarity to Mars provides valuable information for interpreting data from missions, including how to find evidence of relict life on the red planet.
Moreras Martí, Arola
core   +1 more source

Evidence for life in the isotopic analysis of surface sulphates in the Haughton impact structure, and potential applications on Mars [PDF]

, 2012
The analysis of sulphur isotopic compositions in three sets of surface sulphate samples from the soil zone in the Haughton impact structure shows that they are distinct.
Izawa, M.R.M., Osinski, G.R., Boyce, A.J., Banerjee, N., Lee, P., Parnell, J., Flemming, R., Matthew, R.M.   +7 more
core   +1 more source

The Biogeochemical Sulfur Cycle of Marine Sediments

Frontiers in Microbiology, 2019
Microbial dissimilatory sulfate reduction to sulfide is a predominant terminal pathway of organic matter mineralization in the anoxic seabed. Chemical or microbial oxidation of the produced sulfide establishes a complex network of pathways in the sulfur ...
Bo Barker Jørgensen, Alyssa J. Findlay, André Pellerin   +2 more
doaj   +1 more source