Results 91 to 100 of about 76,410 (310)

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

Structure–property insights into nanostructured electrodes for Li-ion batteries from local structural and diffusional probes [PDF]

, 2018
Microwave heating presents a faster, lower energy synthetic methodology for the realization of functional materials. Here, we demonstrate for the first time that employing this method also leads to a decrease in the occurrence of defects in olivine ...
Baker, Peter J., Billinge, Simon J.L., Corr, Serena A., Jensen, Kirsten M. Ø., Johnston, Beth, Paterson, Gary W., Playford, Helen Y., Tucker, Matthew G., Vidal Laveda, Josefa   +8 more
core   +2 more sources

Early Holocene jökulhlaup chronology and deglaciation dynamics in central Iceland

Boreas, EarlyView.
Glacial lake outburst floods (jökulhlaups) have occurred throughout the Quaternary in glaciated regions worldwide. Reconstructing flood chronology yields insight into deglaciation processes, environmental change and the role of extreme events in landscape evolution.
Greta H. Wells, Þorsteinn Sæmundsson, Edwin R. C. Baynes, Timothy Beach, Sheryl Luzzadder‐Beach   +4 more
wiley   +1 more source

Study of olivines from Omolon and Seymchan meteorites using X-ray diffraction and Mössbauer spectroscopy with a high velocity resolution [PDF]

, 2012
Study of olivine from Omolon and Seymchan meteorites was performed using X-ray diffraction and Mössbauer spectroscopy with a high velocity resolution. X-ray diffraction patterns were measured at room temperature while Mössbauer spectra were measured at ...
Chukin, A. V., Grokhovsky, V. I., Oshtrakh, M. I., Petrova, E. V., Semionkin, V. A., Shtoltz, A. K.   +5 more
core   +1 more source

New Magnetite Reference Material for SIMS δ18O Measurements and a Study of Precision and Accuracy Due to Crystal Orientation Effects

Geostandards and Geoanalytical Research, EarlyView.
Key Points A new magnetite reference material (PF21mt) is available for δ18O measurements by SIMS. Reproducibility of measurement results in two laboratories suggest orientation bias of ±2‰ (2s) at 20 keV. Repeatability improves to ±1‰ (2s) when using a 13 keV protocol, suggesting reduced orientation bias. In situ isotope ratio measurements provide the
Michelle Ulrich, Daniela Rubatto, Maria Rosa Scicchitano, Benita Putlitz, Thomas Bovay   +4 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

The Absence of Cold Dust and the Mineralogy and Origin of the Warm Dust Encircling BD +20 307

, 2010
Spitzer Space Telescope photometry and spectroscopy of BD +20 307 show that all of the dust around this remarkable Gyr-old spectroscopic binary arises within 1 AU. No additional cold dust is needed to fit the infrared excess.
Becklin, E. E., Song, I., Weinberger, A. J., Zuckerman, B.   +3 more
core   +1 more source

Interplay Between Mechanical and Petrochemical Models on the Fluid Extraction From Subduction Zones

Journal of Metamorphic Geology, EarlyView.
ABSTRACT The breakdown of hydrous minerals during subduction results in a densification of the rocks, producing volume changes that can trigger fluid pressure fluctuations and hydrofracturing. These volume changes are controlled by the Clapeyron slope of the reaction and are quantified here using a macroscopic framework that integrates a zero ...
Thorsten Andreas Markmann, Pierre Lanari   +1 more
wiley   +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

New knowledge about shock events that affected the L‐chondrite parent body from two heavily shocked L6 meteorite finds

Meteoritics &Planetary Science, EarlyView.
Abstract We report new results from a study of shock‐related features in the L6 ordinary chondrites Northwest Africa (NWA) 4672 and NWA 12841. Our observations confirm the occurrence of eight high‐pressure (HP) minerals in each meteorite, namely, ringwoodite, majorite, akimotoite, wadsleyite, albitic jadeite, lingunite, tuite, and xieite.
I. Baziotis, L. Ferrière, C. Ma, J. Hu, D. Palles, P. D. Asimow   +5 more
wiley   +1 more source