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 +9 more
core +1 more source
Contrasting Mechanisms Controlling Pb Isotopes of Dust in Inland and Marine Archives
Geophysical Research LettersLead (Pb) isotopes are powerful tools for tracing dust provenance and reconstructing paleoclimate. However, variations in Pb isotopic compositions among different grain‐size fractions in sediments complicate their use.
Ruxi Dou +10 more
doaj +1 more source
A normalised seawater strontium isotope curve: possible implications for Neoproterozoic-Cambrian weathering rates and the further oxygenation of the Earth [PDF]
, 2007 The strontium isotope composition of seawater is strongly influenced on geological time scales by changes in the rates of continental weathering relative to ocean crust alteration.
Shields, GA
core +1 more source
The iodine-plutonium-xenon age of the Moon-Earth system revisited
, 2014 From iodine-plutonium-xenon isotope systematics, we re-evaluate time constraints on the early evolution of the Earth-atmosphere system and, by inference, on the Moon-forming event. Two extinct radioactivites (129I, T1/2 = 15.6 Ma, and 244Pu, T1/2 = 80 Ma)
Avice, Guillaume, Marty, Bernard
core +3 more sources
Tracer Applications of Noble Gas Radionuclides in the Geosciences
, 2013 The noble gas radionuclides, including 81Kr (half-life = 229,000 yr), 85Kr (11 yr), and 39Ar (269 yr), possess nearly ideal chemical and physical properties for studies of earth and environmental processes.
Fischer, T. P. +10 more
core +3 more sources
Chemical Geodynamics Insights From a Machine Learning Approach
Geochemistry, Geophysics, Geosystems, 2022 The radiogenic isotope heterogeneity of oceanic basalts is often assessed using 2D isotope ratio diagrams. But because the underlying data are at least six dimensional (87Sr/86Sr, 143Nd/144Nd, 176Hf/177Hf, and 208,207,206Pb/204Pb), it is important to ...
A. Stracke +4 more
doaj +1 more source
Discriminating among Earth composition models using geo-antineutrinos [PDF]
, 2003 It has been estimated that the entire Earth generates heat corresponding to about 40 TW (equivalent to 10,000 nuclear power plants) which is considered to originate mainly from the radioactive decay of elements like U, Th and K, deposited in the crust ...
+26 more
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A Youthful Titan Implied by Improved Impact Simulations
Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.Abstract The small number of impact craters found on Titan suggests that its surface is relatively young. Previous work estimated its surface age to be between 200 and 1000 Myr. This estimate, however, is based on crater scaling laws for water and sand, which are not representative of the composition of Titan's icy surface.
S. Wakita +3 more
wiley +1 more source
N-body simulations of oligarchic growth of Mars: Implications for Hf-W chronology
, 2013 Dauphas and Pourmand (2011) [Nature 473, 489--492] estimated the accretion timescale of Mars to be 1.8 $^{+0.9}_{-1.0}$ Myr from the W isotopes of martian meteorites.
Golabek, Gregor +2 more
core +1 more source
Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.Abstract Soil production, through bedrock weathering, regulates landscape evolution, biogeochemical cycles, and societal sustainability, yet quantifying soil production rates (SPRs) remains difficult due to limited tools. Here, we present a new framework for measuring SPRs based on uranium comminution ages and validate this approach at a deep granitic ...
Shenghui Ouyang +3 more
wiley +1 more source