Results 81 to 90 of about 24,591 (277)

Phosphorus Coupling Obfuscates Lithium Geospeedometry in Olivine

Frontiers in Earth Science, 2020
Lithium zoning in zircon and olivine provides a powerful record of crystal histories and magmatic processes in volcanic systems. Characterizing Li behavior in olivine is important because it is one of the few elements in basaltic systems that track short-
Kendra J. Lynn, Michael O. Garcia, Thomas Shea   +2 more
doaj   +1 more source

Modeling the Thermal Properties of Hydrogen‐Based Direct Reduced Iron Using Computational Thermodynamics and Machine Learning

steel research international, EarlyView.
Hydrogen‐based direct reduced iron (H‐DRI) melts differently from scrap and carbon‐bearing DRI. This work combines differential scanning calorimetry experiments, FactSage thermodynamics, and simple composition‐based regression to predict solidus, liquidus, heat capacity, and enthalpy for H‐DRI.
Ankur Agnihotri, Petri Sulasalmi, Pasquale Cavaliere, Ville‐Valtteri Visuri   +3 more
wiley   +1 more source

Iron Physiology and Its Impact on Atopic Diseases: An EAACI Taskforce Report

Allergy, EarlyView.
ABSTRACT Iron is essential for oxygen transport, energy metabolism, and immune regulation. Yet iron deficiency is the most common micronutrient disorder across all age groups, affecting nearly one quarter of the global population. Iron deficiency triggers nutritional immunity, a host defense mechanism that withholds and redistributes iron, contributing
Franziska Roth‐Walter, Ioana Agache, Beatriz Cabanillas, Roberto Berni Canani, Pasquale Comberiati, Holger Garn, Cristina Gomez‐Casado, Karin Hufnagl, Ekaterina Khaleva, Gregorio P. Milani, Daniel Munblit, Nikolaos Douladiris, Liam O'Mahony, Frank Redegeld, Carmen Riggioni, Peter K. Smith, Betty van Esch, Emilia Vassilopoulou, Carina Venter, Diego G. Peroni   +19 more
wiley   +1 more source

Comparative effects of olivine and sand on KOH-treated clayey soil

Open Geosciences
Improving the strength of clayey soils remains a key concern in geotechnical practice. This study presents a comparative investigation of the effects of olivine waste and sand grains on a clayey soil, both in the absence and presence of potassium ...
Tahir Abdelmaoula Mahamoud, Sert Sedat, Arslan Eylem, Bol Ertan, Özocak Aşkın, Atlı İbrahim   +5 more
doaj   +1 more source

Variable Sr Diffusion and Implications for Rb–Sr Biotite Geochronology

Journal of Metamorphic Geology, EarlyView.
ABSTRACT The rubidium–strontium (Rb–Sr) system has a long pedigree as a geochronological tool that relies on the application of an isochron approach. In particular, biotite contains strongly radiogenic Rb–Sr isotopes, and thus can yield meaningful crystallisation or cooling ages via this approach. However, the response of the Rb–Sr system in biotite to
Riley Rohrer, Christopher L. Kirkland, Hugo Olierook, Tim Johnson, Katy Evans   +4 more
wiley   +1 more source

Volcanological implications inferred from chemical analyses of olivines collected at São Jorge Island (Azorean Archipelago, Portugal) [PDF]

, 2023
openThe Azorean Archipelago, situated in the North Atlantic Ocean, is composed of nine active volcanic islands, put in place during the Quaternary. They are a result of the interaction between the Azores hotspot and the Mid-Atlantic Ridge (MAR).
BEGHINI, ERICA LUCE
core  

P–T Modelling Constrains the Depth of Emplacement of the Porto Azzurro Pluton and Implies Minor Exhumation Caused by the Zuccale Fault (Island of Elba, Italy)

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Understanding the pressure of emplacement of granitic intrusions is crucial to understanding the exhumation history of plutons and constraining the tectonic setting of magma emplacement. However, P–T and geochronological constraints from exhumed plutons are often characterized by large uncertainties, especially in shallow crustal settings with
Samuele Papeschi, Marco Bonini, Matteo Lupi, Chiara Del Ventisette, Domenico Montanari   +4 more
wiley   +1 more source

Olivine-hosted melt inclusions in Hawaiian picrites: equilibration, melting, and plume source characteristics

, 2002
Olivine-hosted melt inclusions in tholeiitic picrites from five Hawaiian volcanoes (Koolau, Mauna Loa, Kilauea, Loihi, and Hualalai) have major and trace element compositions that illustrate the magmatic characteristics of ocean island volcanoes and the ...
Vadim Kamenetsky (14740705), Norman, MD (15487847), Nielsen, RL (15492014), Garcia, MO (15487850)   +3 more
core   +1 more source

The Effect of Intracrystalline Water on the Mechanical Properties of Olivine at Room Temperature

Geophysical Research Letters
The effect of small concentrations of intracrystalline water on the strength of olivine is significant at asthenospheric temperatures but is poorly constrained at lower temperatures applicable to the shallow lithosphere.
Kathryn M. Kumamoto, Lars N. Hansen, Thomas Breithaupt, David Wallis, Bo‐Shiuan Li, David E. J. Armstrong, David L. Goldsby, Yang (Will) Li, Jessica M. Warren, Angus J. Wilkinson   +9 more
doaj   +1 more source

An olivine-clinopyroxene geothermometer

Contributions to Mineralogy and Petrology, 1976
The olivine-clinopyroxene (Fe-Mg partition) geothermometer of Powell and Powell (1974) was derived on the basis of clinopyroxene mixing parameters which imply a large miscibility gap in CaFeSi2O6-CaMgSi2O6-CaAl2SiO6 clinopyroxenes at 950° C. Application of the Powell and Powell thermometer in an empirical way (ignoring likely errors in mixing ...
openaire   +1 more source