Results 31 to 40 of about 47,686 (243)

Sulfur loss from subducted altered oceanic crust and implications for mantle oxidation [PDF]

open access: yes, 2020
© The Author(s), [year]. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Walters, J. B., Cruz-Uribe, A. M., & Marschall, H. R.
Cruz‐Uribe, Alicia M.   +2 more
core   +1 more source

Hydrochemical determination of source water contributions to Lake Lungo and Lake Ripasottile (central Italy) [PDF]

open access: yes, 2016
Lake Lungo and Lake Ripasottile are two shallow (4-5 m) lakes located in the Rieti Basin, central Italy, that have been described previously as surface outcroppings of the groundwater table.
Archer, Claire   +8 more
core   +3 more sources

Modeling pN2 through Geological Time: Implications for Planetary Climates and Atmospheric Biosignatures [PDF]

open access: yes, 2016
Nitrogen is a major nutrient for all life on Earth and could plausibly play a similar role in extraterrestrial biospheres. The major reservoir of nitrogen at Earth's surface is atmospheric N2, but recent studies have proposed that the size of this ...
Buick, R.   +5 more
core   +2 more sources

A black shale protolith for gold-tellurium mineralisation in the Dalradian Supergroup (Neoproterozoic) of Britain and Ireland [PDF]

open access: yes, 2017
The Dalradian Supergroup of Britain and Ireland is mineralised by gold-tellurium vein deposits. The host succession includes carbonaceous, pyritic shales (pelites) which were a source of trace elements, including gold and tellurium.
Armstrong, J.   +5 more
core   +1 more source

Tracing the Early Emergence of Microbial Sulfur Metabolisms

open access: yesGeomicrobiology Journal, 2020
Hydrogen sulfide (nH2S) and sulfur oxide (SO n ; n = 1, 2, 3) gases in early Earth’s globally anoxic atmosphere were subjected to gas-phase chemical transformations by UV light.
P. R. Morrison, S. Mojzsis
semanticscholar   +1 more source

SNR-calibrated Type Ia supernova models [PDF]

open access: yes, 2019
Current Type Ia supernova (SN Ia) models can reproduce most visible+IR + UV observations. In the X-ray band, the determination of elemental abundance ratios in supernova remnants (SNRs) through their spectra has reached enough precision to constrain SN ...
Badenes Montoliu, Carles   +2 more
core   +2 more sources

The triple oxygen isotope composition of marine sulfate and 130 million years of microbial control

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2022
Significance Stable isotopes in marine sulfate preserve information about Earth’s climate. Interpretations of geologic marine sulfate records infer changes in weathering states, microbial activity, volcanic events, and even atmospheric oxygen levels in ...
A. Waldeck   +4 more
semanticscholar   +1 more source

Degassing history of water, sulfur, and carbon in submarine lavas from Kilauea volcano, Hawaii [PDF]

open access: yes, 1991
Major, minor, and dissolved volatile element concentrations were measured in tholeiitic glasses from the submarine portion (Puna Ridge) of the east rift zone of Kilauea Volcano, Hawaii.
Clague, David A.   +2 more
core   +1 more source

Seasonal changes in microbial dissolved organic sulfur transformations in coastal waters [PDF]

open access: yes, 2020
The marine trace gas dimethylsulfide (DMS) is the single most important biogenic source of atmospheric sulfur, accounting for up to 80% of global biogenic sulfur emissions.
Dixon, Joanna L.   +3 more
core   +1 more source

Evidence for an impact-induced biosphere from the δ34S signature of sulphides in the Rochechouart impact structure, France [PDF]

open access: yes, 2017
The highly eroded 23 km diameter Rochechouart impact structure, France, has extensive evidence for post-impact hydrothermal alteration and sulphide mineralization.
Boyce, A.J.   +4 more
core   +1 more source

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