Results 231 to 240 of about 20,684 (285)

A NEW ISOTOPE, SULFUR-38

open access: yes, 1957
Nethaway, F.R., Caretto, A.A.
openaire   +1 more source

Biogeochemistry of Sulfur Isotopes

Reviews in Mineralogy and Geochemistry, 2001
Sulfur, with an atomic weight of 32.06, has four stable isotopes. By far the most abundant is 32S, representing around 95% of the total sulfur on Earth. The next most abundant isotope is 34S, followed by 33S, and finally 36S is the least abundant contributing only 0.0136% to the total (Table 1⇓). The natural abundances of sulfur isotopes, however, vary
openaire   +3 more sources

Sulfur Isotopic Composition of Mangroves

Isotopes in Environmental and Health Studies, 1998
Abstract Sulfur isotope ratios of mangrove leaves of 19 species were compared to discuss the species-specific characteristics of sulfur uptake and assimilation. The members of Rhizophora and Bruguiera always show remarkable enrichments of the light isotope, giving negative δ(34)S values in most cases.
N, Okada, A, Sasaki
openaire   +2 more sources

Sulfur isotope signatures of eucrites and diogenites

open access: yesGeochimica Et Cosmochimica Acta, 2018
High precision sulfur isotope data on eight eucrites and two diogenites are reported to explore the provenance of sulfur and processes that affected the sulfur isotope composition and sulfur abundance within the HED (Howardite, Eucrite, Diogenite) parent
Nanping Wu   +2 more
exaly   +2 more sources

Deciphering sulfur cycling with multiple sulfur isotopes

Nature Reviews Earth & Environment, 2022
Laetitia Guibourdenche explains the use of multiple sulfur isotopes in understanding past and present sulfur cycling.
openaire   +2 more sources

Seawater Sulfur Isotope Fluctuations in the Cretaceous

Science, 2004
The exogenic sulfur cycle is tightly coupled with the carbon and oxygen cycles, and therefore a central component of Earth's biogeochemistry. Here we present a high-resolution record of the sulfur isotopic composition of seawater sulfate for the Cretaceous.
Adina, Paytan   +3 more
openaire   +2 more sources

Sources and Isotopic Composition of Atmospheric Sulfur

Science, 1961
In nonindustrial areas the prime source of SO--4in rain and snow is atmospherically oxidized H2S that is produced predominately along coastal belts by anaerobic bacteria. The δ S34analyses of atmospheric SO--4vary from +3.2 to +15.6 per mil in contrast to +20.7 per mil for sea water SO--4.
M L, Jensen, N, Nakai
openaire   +2 more sources

The isotopic composition of plant sulfur

Organic Geochemistry, 1980
Abstract The isotopic composition of sulfur has been studied in plants representative of various regions of the U.S.S.R., two oceanic islands, and atmospheric precipitations on land and in marine areas. In soils, the isotopic composition of sulfur in the atmospheric water varies as a result of sulfate reduction (increase of δ 34 S of the soil sulfate)
F.V. Chukhrov   +3 more
openaire   +1 more source

Sulfur Isotope Fractionation in the Biogeochemical Sulfur Cycle of Marine Sediments

Isotopes in Environmental and Health Studies, 2001
Abstract The sulfur isotopic record of sedimentary sulfides (mainly pyrite) and sulfates shows considerable variations in time and plays an important role in the biological and geochemical interpretation, e.g., of the evolution of life and the oxygen partial pressure of Earth's atmosphere (e.g. [1]).
openaire   +3 more sources

Sulfur isotopes and ore deposits

Economic Geology, 1960
A geochemical history of the sulfur isotopes in the crust of the earth is presented. New measurements of the S³²/S³⁴ ratio on sulfide minerals are used to show that transport and depositional processes do not appear to produce appreciable variation in the relative abundance of the sulfur isotopes.
Wayne Urban Ault, J. Laurence Kulp
openaire   +1 more source

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