Results 11 to 20 of about 16,929 (223)

Constraints on Martian Chronology from Meteorites

Geosciences, 2020
Martian meteorites provide the only direct constraints on the timing of Martian accretion, core formation, magmatic differentiation, and ongoing volcanism. While many radiogenic isotope chronometers have been applied to a wide variety of Martian samples,
Zoltán Váci, Carl Agee
doaj   +1 more source

Radiogenic isotope: not just about words

Applied Geochemistry, 2022
This viewpoint is a short comment on gender issues with isotope terminology. The terms "parent"/"daughter" should be avoided in favor of the more descriptive "precursor ion" and "product ion" terms.
Olivier Pourret, Karen Johannesson
openaire   +3 more sources

Distinct iron cycling in a Southern Ocean eddy

Nature Communications, 2020
Eddies are common ocean features that isolate large swaths of seawater, but it is unclear how they influence productivity of phytoplankton trapped inside.
Michael J. Ellwood, Robert F. Strzepek, Peter G. Strutton, Thomas W. Trull, Marion Fourquez, Philip W. Boyd   +5 more
doaj   +1 more source

Landslide-Induced Weathering in Tectonically Active Mountains: Evidence From Dissolved Radiogenic Uranium Isotopes

Frontiers in Earth Science, 2022
Understanding weathering processes in landslide-dominated catchments is critical for evaluating the role of landslides in chemical weathering and the global carbon cycle.
Laifeng Li, Laifeng Li, Laifeng Li, Gen K. Li, Le Li, Le Li, Gaojun Li, Gaojun Li   +7 more
doaj   +1 more source

Radiogenic heat production in granitoids from the Sierras de Córdoba, Argentina

Geothermal Energy, 2021
One of the most important processes of heat generation from the Earth's interior is the radioactive decay of isotopes. The main hosts of the major radiogenic elements U, Th and K in the crust are granitoids.
M. Pleitavino, M. E. Carro Pérez, E. García Aráoz, M. A. Cioccale   +3 more
doaj   +1 more source

Amphibole: A major carrier of helium isotopes in crustal rocks [PDF]

, 2016
The first evidence for a specific role of amphiboles in He isotope balance of crustal rocks was presented in early contributions by Gerling et al. (1971, 1976).
A.B. Verchovsky, Andrews, Ashkinadze, Baxter, Baxter, Baxter, Begemann, Belkov, Damon, Farley, Gaber, Gannibal, Gerling, Gerling, Gerling, Gerling, Gorshkov, Graham, Helz, Hilton, I.L. Kamensky, I.N. Tolstikhin, Jackson, Jackson, Jackson, Kalita, Kamensky, Kamensky, Kelley, Kendrick, Komarov, Komarov, Kremenetsky, Lee, Lee, Lee, Lee, Lippolt, M.A. Gannibal, Mamyrin, Martel, Matsumoto, Morozova, Morrison, Petrov, Pujol, S.V. Tarakanov, Scarsi, Shelby, Sherlock, Staudacher, Tolstikhin, Tolstikhin, Tolstikhin, Tolstikhin, Tolstikhin, Tolstikhin, Trull, V.I. Skiba, V.R. Vetrin, Verchovsky, Vetrin, Vetrin, Wartho, Wright, Wright   +65 more
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Evidence of hydrological control of Sr behavior in stream water (Strengbach catchment, Vosges mountains, France) [PDF]

, 2002
Strontium and particularly 87Sr/86Sr ratios in stream water have often been used to calculate weathering rates in catchments. Nevertheless, in the literature, discharge variation effects on the geochemical behavior of Sr are often omitted or considered ...
Amiotte-Suchet, Anne Probst, Aubert, Bailey, Bain, Bain, Bonhomme, Clow, Dambrine, Daniel Viville, Depaolo, Dominique Aubert, Elias, Fichter, Fichter, Gosz, Gosz, Graustein, Graustein, Idir, Jacks, Krishnaswami, Ladouche, Land, Lasaga, Lefèvre, Likens, McNutt, Miller, Négrel, Négrel, Palmer, Peter Stille, Pionke, Pionke, Probst, Probst, Probst, Probst, Probst, Probst, Rice, Riotte, Stottlemyer, Tricca, Åberg, Åberg, Åberg, Åberg   +48 more
core   +2 more sources

Neodymium isotopic composition and concentration in the western North Atlantic Ocean: results from the GEOTRACES GA02 section [PDF]

, 2015
The neodymium (Nd) isotopic composition of seawater is commonly used as a proxy to study past changes in the thermohaline circulation. The modern database for such reconstructions is however poor and the understanding of the underlying processes is ...
Coles, B, Crocket, K, De Baar, HJW, Gerringa, LJA, Kreissig, K, Lambelet, M, Rehkamper, M, Rijkenberg, MJA, Steinfeldt, R, Van de Flierdt, T   +9 more
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Radiogenic p-isotopes from type Ia supernova, nuclear physics uncertainties, and galactic chemical evolution compared with values in primitive meteorites [PDF]

, 2014
The nucleosynthesis of proton-rich isotopes is calculated for multi-dimensional Chandrasekhar-mass models of Type Ia supernovae (SNe Ia) with different metallicities.
Arlandini, Bennett, Bisterzo, Borg, C. Travaglio, Dauphas, Dauphas, Davis, Dillmann, Dillmann, F. K. Röpke, Friedman, Gallino, Hayakawa, Howard, Jacobsen, Kiss, Kusakabe, Lodders, Marganiec, Meissner, Meyer, N. Dauphas, Qian, R. Gallino, Rauscher, Rauscher, Rauscher, Rauscher, Rauscher, Rauscher, Rauscher, Rauscher, Rayet, Schönbächler, Somorjai, T. Rauscher, Travaglio, Travaglio, Travaglio, Travaglio, Travaglio, W. Hillebrandt   +42 more
core   +2 more sources

Human and faunal stable and radiogenic isotope data from four Bahraini and three Jordanian assemblages c. 5300 B.C. to 1500 AD

Data in Brief, 2021
This dataset presents carbon, nitrogen, oxygen (carbonates and phosphates) and strontium data from human and faunal remains from that portion of seven assemblages from Jordan and Bahrain currently curated at the Smithsonian Institution's National Museum ...
Damien Huffer
doaj   +1 more source