Results 1 to 10 of about 33,794 (49)
Simple Stochastic Modeling of Snowball Probability Throughout Earth History [PDF]
, 2022 Over its multibillion-year history, Earth has exhibited a wide range of climates. Its history ranges from snowball episodes where the surface was mostly or entirely covered by ice to periods much warmer than today, where the cryosphere was virtually absent.
arxiv +1 more source
GEOCHEMICAL JOURNAL, 2001 Geochmeical studies reporting lanthanide tetrad effects in natural samples often cite the original examples of tetrad effect depicted by log Kd(org/aq) for Ln(III) in the two solvent-extraction systems (Peppard et al., 1969) and its theoretical interpretation (Jorgensen, 1970; Nugent, 1970).
Akimasa Masuda, Iwao Kawabe
openaire +3 more sources
Cost-Effective Cementitious Material Compatible with Yucca Mountain Repository Geochemistry [PDF]
, 2004 The current plans for the Yucca Mountain (YM) repository project (YMP) use steel structures to stabilize the disposal drifts and connecting tunnels that are collectively over 100 kilometers in length. The potential exist to reduce the underground construction cost by 100s of millions of dollars and improve the repository's performance.
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PLoS ONEPalynological analysis of surface soil and sub-surface sediments from the outwash plain of Hamtah Glacier, Lahaul-Spiti, India, has brought out the vegetation and climatic changes in the area during the last 1580 years.
Ruchika B Mohanty +6 more
doaj +1 more source
Dynamical Geochemistry: Mantle dynamics and its role in the formation of geochemical heterogeneity [PDF]
arXiv, 2023 Chemical geodynamics is a term coined nearly forty years ago to highlight the important link between Earth's geochemical evolution and plate tectonics & mantle convection. Significant progress in our understanding of this connection has taken place since then through advances in the analytical precision of geochemical measurements, dramatically ...
arxiv
Radioactive heat production of six geologically important nuclides [PDF]
Geochemistry, Geophysics, Geosystems 18(9), 3530-3541 (2017), 2017 Heat production rates for the geologically important nuclides ${}^{26}$Al, ${}^{40}$K, ${}^{60}$Fe, ${}^{232}$Th, ${}^{235}$U, and ${}^{238}$U are calculated on the basis of recent data on atomic and nuclear properties. The revised data differ by several per cent from some older values, but indicate that more recent analyses converge toward values with
arxiv +1 more source
Novel color center platforms enabling fundamental scientific discovery [PDF]
, 2020 Color centers are versatile systems that generate quantum light, sense magnetic fields and produce spin-photon entanglement. We review how these properties have pushed the limits of fundamental knowledge in a variety of scientific disciplines, from rejecting local-realistic theories to sensing superconducting phase transitions.
arxiv +1 more source
Influence of Geochemistry on Toughening Behavior of Organic-Rich Shale [PDF]
, 2018 Our research objective is to understand the influence of geochemistry on the fracture behavior of organic-rich shale at multiple length-scales. Despite an increasing focus on the fracture behavior of organic-rich shale, the relationships between geochemistry and fracture behavior remain unclear and there is a scarcity of experimental data available. To
arxiv +1 more source
Devolatilization of Subducting Slabs, Part I: Thermodynamic Parameterization and Open System Effects [PDF]
Geochemistry, Geophysics,Geosystems, 20 (2019), 2019 The amount of H$_2$O and CO$_2$ that is carried into deep mantle by subduction beyond subarc depths is of fundamental importance to the deep volatile cycle but remains debated. Given the large uncertainties surrounding the spatio-temporal pattern of fluid flow and the equilibrium state within subducting slabs, a model of H$_2$O and CO$_2$ transport in ...
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Devolatilization of Subducting Slabs, Part II: Volatile Fluxes and Storage [PDF]
Geochemistry, Geophysics, Geosystems, 20 (2019), 2019 Subduction is a crucial part of the long-term water and carbon cycling between Earth's exosphere and interior. However, there is broad disagreement over how much water and carbon is liberated from subducting slabs to the mantle wedge and transported to island-arc volcanoes.
arxiv +1 more source