Results 121 to 130 of about 85,610 (304)

Mercurian impact ejecta: Meterorites and mantle

, 2008
We have examined the fate of impact ejecta liberated from the surface of Mercury due to impacts by comets or asteroids, in order to study (1) meteorite transfer to Earth, and (2) re-accumulation of an expelled mantle in giant-impact scenarios seeking to ...
Artemieva, Benz, Benz, Bottke, Boynton, Burns, Cameron, Dones, Gladman, Gladman, Gladman, Head, Love, Marchi, Markowski, Melosh, Morbidelli, Palme, Robertson, Sprague, Vokrouhlický, Wetherill, Wyatt   +22 more
core   +1 more source

Combustion and Pyrolysis EA‐IRMS Techniques to Determine the δ2H of Diamonds

Rapid Communications in Mass Spectrometry, Volume 40, Issue 10, 30 May 2026.
ABSTRACT Rationale Diamonds are generally considered to be metasomatic minerals originating from the Earth's mantle. They formed through the interaction of carbon‐bearing fluids or melts with the surrounding deep lithology. Most knowledge about the formation of diamonds comes from studying their mineral inclusions or stable isotopes.
François Fourel, Christophe Lécuyer, Emilie Thomassot, Etienne Deloule, Charles Ojeimi   +4 more
wiley   +1 more source

Fe isotopic composition of Martian meteorites [PDF]

, 2005
In the present work, we have measured iron isotope compositions of a group of Martian meteorites to establish a baseline Fe-isotope fractionation pattern in the case of high-temperature igneous rocks from ...
Anand, M., Grady, M. M., Mullane, E., Russell, S. S.   +3 more
core  

Acquisition of Self‐Reversed Magnetization in Greigite Driven by Antiparallel Vortex‐Core Coupling During Low‐Temperature Oxidation

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract Self‐reversed magnetization, acquired antiparallel to the external field, can complicate the interpretation of paleomagnetic directional records, particularly in altered greigite‐bearing sediments with anomalous magnetizations. The underlying physical process for this self‐reversal remains poorly constrained.
Shichu Chen, Liao Chang, Wyn Williams
wiley   +1 more source

Textural and minerochemical features of NWA 1807 and 2180, two new CV3 chondrites from northwest Africa [PDF]

, 2007
A textural and minerochemical study has been performed on NWA 1807 and 2180 chondrites in order to determine sizes and typologies of chondrules, relative abundances of mineral phases, compositions of main phases and bulk oxygen isotope ...
Franchi, I. A., Greenwood, R. C., Moggi-Cecchi, V., Pratesi, G., Salvadori, A.   +4 more
core  

Lithologic Mapping of HED Terrains on Vesta using Dawn Framing Camera Color Data

, 2013
The surface composition of Vesta, the most massive intact basaltic object in the asteroid belt, is interesting because it provides us with an insight into magmatic differentiation of planetesimals that eventually coalesced to form the terrestrial planets.
Corre, Lucille Le, Gaskell, Robert, Hiesinger, Harald, Li, Jian-Yang, Nathues, Andreas, Raymond, Carol, Reddy, Vishnu, Russell, Christopher T., Sanchez, Juan A., Sierks, Holger, Thangjam, Guneshwar   +10 more
core   +1 more source

Resolving the Internal Magnetic Domain Structure of Cloudy Zone Tetrataenite

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract Recent advances in magnetic imaging can directly capture the internal magnetization of natural and synthetic materials at resolutions <10 nm. This capability opens new possibilities to determine the magnetic domain state of ferromagnetic minerals that are fundamental for recording and retaining paleomagnetic records.
Elias N. Mansbach, Richard J. Harrison, Tim A. Butcher, Simone Finizio, Sergio Valencia, Thomas Ginnis   +5 more
wiley   +1 more source

Constraining the Hydration of Clay Minerals and Abundances of Amorphous Phases in Gale Crater, Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Both water and organic matter are required for the development and persistence of life. Phyllosilicates (clay minerals) have high surface areas that easily sorb water and organic matter. The Curiosity rover has investigated several hundred meters of stratigraphy in Gale crater, including where clays were detected from orbit.
Sean Czarnecki, Craig Hardgrove, Liz Rampe, Patrick Gasda   +3 more
wiley   +1 more source

In Situ Detection of Opal‐A in Jezero Crater, Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract We report the in situ detection of amorphous hydrated silica in the Bills Bay abrasion patch, located in the eastern portion of the Margin Unit between the rim of Jezero crater and the western delta. Here, hydrated silica co‐occurs with olivine, Fe‐Mg carbonates, secondary Fe‐Mg silicates, and hydrated Mg‐sulfate as determined by UV Raman ...
Sergei V. Bykov, Kenneth H. Williford, Anushree Srivastava, Andrew Steele, Linda C. Kah, Travis A. Olds, Sunanda Sharma, Richard V. Morris, Kimberly Poppy Sinclair, Ryan S. Jakubek, Nikole C. Haney, Francis M. McCubbin, Mariek E. Schmidt, Ashley E. Murphy, Sandra Siljeström, Eva L. Scheller, William Abbey, Sanford A. Asher, Kevin P. Hand, Kyle Uckert, Jeffrey T. Osterhout, Carina Lee, Rohit Bhartia, Michelle E. Minitti, Joanna V. Clark, Patrick Casbeer, Shiv K. Sharma   +26 more
wiley   +1 more source

Three-Step Proton Irradiation of Meteorites: Structural and Compositional Evolution Under Space-like Irradiation

Geosciences
This study reveals the effects of artificial space-like proton irradiation on three meteorite samples that are Northwest Africa (NWA) 4560 LL3.2 and NWA 5838 H6 chondrite meteorites, as well as the Dhofar (Dho) 007 eucrite.
Dániel Rezes, Ildikó Gyollai, Sándor Biri, Krisztián Fintor, Zoltán Juhász, Richárd Rácz, Béla Sulik, Máté Szabó, Bernadett D. Pál, Ákos Kereszturi   +9 more
doaj   +1 more source