Results 121 to 130 of about 45,209 (160)

Calcium‐aluminum‐rich inclusion found in the Ivuna CI chondrite: Are CI chondrites a good proxy for the bulk composition of the solar system?

Meteoritics & Planetary Science, 2023
Cosmochemists have relied on CI carbonaceous chondrites as proxies for chemical composition of the non‐volatile elements in the solar system because these meteorites are fine‐grained, chemically homogeneous, and have well‐determined bulk compositions ...
David R. Frank, G. Huss, M. Zolensky, K. Nagashima, L. Le   +4 more
semanticscholar   +1 more source

The Diverse Planetary Ingassing/Outgassing Paths Produced over Billions of Years of Magmatic Activity

Space Science Reviews, 2021
Fabrice Gaillard, M. Bouhifd, E. Füri, V. Malavergne, Yves, Marrocchi, L. Noack, Giovanni Ortenzi, Mathieu Roskosz, S. Vulpius   +9 more
semanticscholar   +2 more sources

Infall and Disk Processes – the Message from Meteorites

Space Science Reviews
How do planetary systems, in general, and our own Solar System (SS), in particular, form? In conjunction, Astronomy and Isotope Cosmochemistry provide us with powerful tools to answer this age-old question. In this contribution, we review recent advances
F. L. Tissot, C. Burkhardt, Aleksandra Kuznetsova, A. Pack, Martin Schiller, F. Spitzer, Elishevah van Kooten, T. E. Yap   +7 more
semanticscholar   +1 more source

Volume measurement of microparticles using SEM photogrammetry and 3‐D reconstruction

Meteoritics & Planetary Science
In this paper, we introduce a method for volume measurement of microparticles that includes scanning electron microscope photogrammetry with 3‐D model construction.
Y. Zheng, X. Yang, M. Valdes, A. M. Davis, P. R. Heck   +4 more
semanticscholar   +1 more source

Highly siderophile element nano‐nuggets in Wabar impact glass

Meteoritics & Planetary Science
Circa 300 years ago, a ~15‐m iron asteroid impacted sand dunes in the Empty Quarter of Saudi Arabia, creating the Wabar craters and fragments of the IIIAB Wabar iron meteorite. A significant portion of the asteroid dissolved into the sand, forming a wide
Axel Wittmann, Marc Biren
semanticscholar   +1 more source

Abundance, sizes, and major element compositions of components in CR and LL chondrites: Formation from single reservoirs

Meteoritics & Planetary Science
Abundances, apparent sizes, and individual chemical compositions of chondrules, refractory inclusions, other objects, and surrounding matrix have been determined for Semarkona (LL3.00) and Renazzo (CR2) using consistent methods and criteria on X‐ray ...
Denton S. Ebel, M. Gemma, S. Alpert, J. Bayron, A. Lobo, M. Weisberg   +5 more
semanticscholar   +1 more source

Metal–forsterite condensate nodules and H‐L‐LL compositions

Meteoritics & Planetary Science
Compared to the carbonaceous chondrites (CCs), ordinary chondrites (OCs) are depleted in Mg and refractory lithophile elements. The OCs are classified by a trend from high metal (H) to low total iron (L) to low total iron and low metal (LL) compositions ...
Denton S. Ebel, M. Gemma, M. Weisberg, Jon M. Friedrich   +3 more
semanticscholar   +1 more source

Corundum ± magnesium‐deltalumite ± hibonite‐bearing objects in the CH chondrite Sayh al Uhaymir 290

Meteoritics & Planetary Science
Isolated corundum grains and corundum ± Mg‐deltalumite [(Al,Mg)(Al,◻)2O4] ± hibonite assemblages were investigated in the CH3.0 metal‐rich carbonaceous chondrite Sayh al Uhaymir (SaU) 290.
Konstantin M. Ryazantsev, A. Krot, Chiu‐Shun Ma, Marina A. Ivanova, C. A. Lorenz, Vasily D. Shcherbakov   +5 more
semanticscholar   +1 more source

Distribution analysis of rare earth elements in fine‐grained CAIs of the Allende meteorite using multiple‐spot femtosecond LA‐ICP‐MS

Meteoritics & Planetary Science
Calcium–aluminum‐rich inclusions (CAIs) in chondrites are one of the oldest materials in the solar system. Presence of refractory minerals in CAIs suggests that they formed thorough a condensation process from nebular gas of solar composition.
Y. Masuda, S. Niki, Takafumi Hirata, T. Yokoyama   +3 more
semanticscholar   +1 more source

Multiple CV chondrite lithologies in Camel Donga 003 (CK3): Implications for the CV and CK parent bodies

Meteoritics & Planetary Science
Camel Donga 003 (CD 003) was originally classified as a CK3 chondrite based on its coarse‐grained matrix, Ni‐rich sulfides, Cr‐rich magnetite, and CK‐like silicate mineralogy.
E. G. Alevy, T. Dunn, A. Krot, Paul Cardon‐Pilotaz, J. Gross   +4 more
semanticscholar   +1 more source