Climate driven carbon and microbial signatures through the last ice age
J. D’Andrilli, H.J. Smith, M. Dieser, C.M. Foreman
Ice cores preserve diverse materials as millennial-scale proxies for Earth’s history. While major ions and elemental analyses are commonly investigated in palaeoclimate reconstructions, the integration of biological measurements is rapidly developing. [...]
Stable strontium isotopic heterogeneity in the solar system from double-spike data
B.L.A. Charlier, I.J. Parkinson, K.W. Burton, M.M. Grady, C.J.N. Wilson, E.G.C. Smith
Strontium isotopic anomalies in meteorites are important in assessing nucleosynthetic sources to, and measuring the timing of, early solar system processes. However, conventional use [...]
Running out of gas: Zircon 18O-Hf-U/Pb evidence for Snowball Earth preconditioned by low degassing
J. Hartmann, G. Li, A.J. West
The general long-term stability of Earth’s climate over geologic time was punctuated by dramatic excursions. Between ca. 2.5 and 0.5 billion years ago (Ga), these events included the globally extensive glaciations [...]
The gravitas of gravitational isotope fractionation revealed in an isolated aquifer
T. Giunta, O. Devauchelle, M. Ader, R. Locke, P. Louvat, M. Bonifacie, F. Métivier, P. Agrinier
Despite the ubiquitous effects of gravitation on Earth, its potential influence on relative distribution of isotopic substances has remained elusive – and so far only identified in confined gaseous systems (Craig et al., 1988; Severinghaus et al., 1996, 1998). [...]
Magma dynamics of ancient Mt. Etna inferred from clinopyroxene isotopic and trace element systematics
S.A. Miller, M. Myers, M.F. Fahnestock, J. Bryce, J. Blichert-Toft
Dynamic magmatic processes driving volcanic eruptions, including melting, fractionation, and assimilation, provide critical insights into plumbing systems supporting long-lived magmatism.
The solubility of heat-producing elements in Earth’s core
I. Blanchard, J. Siebert, S. Borensztajn, J. Badro
The long term thermal and dynamic evolution of Earth’s core depends on its energy budget, and models have shown that radioactive decay due to K and U disintegration can contribute significantly to core dynamics [...]
