Results 1 to 10 of about 45,209 (160)

First Optical Constants of Laboratory-generated Organic Refractory Materials (Tholins) Produced in the NASA Ames COSmIC Facility from the Visible to the Near Infrared (0.4–1.6 μm): Application to Titan’s Aerosols

The Planetary Science Journal, 2023
We have measured the complex refractive indices, from 0.4 to 1.6 μm, of five laboratory-generated organic refractory materials (tholins) produced at low temperature (150 K) using plasma chemistry in the stream of a supersonic expansion in NASA Ames ...
E. Sciamma-O’Brien, T. Roush, P. Rannou, D. Dubois, Farid Salama   +4 more
semanticscholar   +1 more source

Breaking Degeneracies in Formation Histories by Measuring Refractory Content in Gas Giants

The Astrophysical Journal, 2023
Relating planet formation to atmospheric composition has been a long-standing goal of the planetary science community. So far, most modeling studies have focused on predicting the enrichment of heavy elements and the C/O ratio in giant planet atmospheres.
Yayaati Chachan, Heather A. Knutson, Joshua Lothringer, Geoffrey A. Blake   +3 more
doaj   +1 more source

Disk transport rates from Ti isotopic signatures of refractory inclusions

Meteoritics & Planetary Science, 2022
The early solar system was a dynamic period during which the formation of early solids set into motion the process of planet building. Although both astrophysical observations and theoretical modeling demonstrate the presence of widespread transport of ...
J. Render, J. Bryson, S. Ebert, G. Brennecka   +3 more
semanticscholar   +1 more source

Survival of presolar p-nuclide carriers in the nebula revealed by stepwise leaching of Allende refractory inclusions

Science Advances, 2021
Step leaching of fine-grained refractory inclusions from Allende reveals the presence of large 84Sr anomalies. The 87Rb-87Sr radiochronometer provides key insights into the timing of volatile element depletion in planetary bodies, yet the unknown ...
B. Charlier, F. Tissot, H. Vollstaedt, N. Dauphas, C. Wilson, R. Marquez   +5 more
semanticscholar   +1 more source

A super‐refractory inclusion containing nonstoichiometric spinel from the CO3.0 chondrite Yamato 81020

Meteoritics and Planetary Science, 2021
We studied a unique super‐refractory inclusion with a core‐mantle structure from CO3.0 Yamato 81020 by secondary ion mass spectrometry, electron microprobe, and scanning electron microscope techniques.
H. Yurimoto, A. Rubin, S. Itoh, J. Wasson, A. Krot   +4 more
semanticscholar   +1 more source

From stellar nebula to planets: the refractory components [PDF]

, 2014
We computed the abundance of refractory elements in planetary bodies formed in stellar systems with solar chemical composition by combining models for chemical composition and planet formation.
Alibert, Yann, Cabral, Nahuel, Leya, Ingo, Marboeuf, Ulysse, Mezger, Klaus, Thiabaud, Amaury   +5 more
core   +1 more source

Nongravitational Forces in Planetary Systems [PDF]

The Planetary Science Journal
Nongravitational forces play surprising and, sometimes, centrally important roles in shaping the motions and properties of small planetary bodies. In the solar system, the morphologies of comets, the delivery of meteorites, and the shapes and dynamics of
David Jewitt
semanticscholar   +1 more source

Beckettite, Ca2V6Al6O20, a new mineral in a Type A refractory inclusion from Allende and clues to processes in the early solar system

Meteoritics and Planetary Science, 2021
Beckettite (Ca2V6Al6O20; IMA 2015‐001) is a newly discovered refractory mineral, occurring as micrometer‐sized grains intergrown with hibonite and perovskite, and surrounded by secondary grossular, anorthite, coulsonite, hercynite, and corundum.
Chi Ma, A. Krot, J. Paque, O. Tschauner, K. Nagashima   +4 more
semanticscholar   +1 more source

The formation of boundary clinopyroxenes and associated glass veins in type B1 CAIs [PDF]

, 2009
We used focused ion beam thin section preparation and scanning transmission electron microscopy (FIB/STEM) to examine the interfacial region between spinel and host melilite for spinel grains in type B1 inclusions from the Allende and Leoville ...
Abreu, Armstrong, Bacon, Barber, Barber, Beckett, Beckett, Beckett, Bernatowicz, Bleiner, Blum, Blum, Bradley, Caillet, Caillet, Cain, Campbell, Clayton, Connolly, Connolly, Connolly, Croat, Daulton, Daulton, Fahey, Floss, Fransolet, Gaetani, Giannuzzi, Giannuzzi, Goresy, Gray, Greshake, Grossman, Grossman, Grossman, Heaney, Hill, Ireland, Ito, Keller, Keller, Kennedy, Kieffer, Komorowski, Kuehner, Kurat, Lee, Lin, Lin, Lundstrom, MacPherson, MacPherson, MacPherson, Marvin, Mendybaev, Nakamura, Nguyen, Obst, Overwijk, Palme, Paque, Paque, Paque, Peters, Prenitzer, Reid, Richter, Richter, Richter, Rives, Simon, Simon, Simon, Simon, Stolper, Stolper, Streck, Stroud, Sylvester, Vidal, Weber, Wei, Wirth   +83 more
core   +1 more source

Geochemistry and petrogenesis of the Feshark intrusion (NE Isfahan city)

Journal of Economic Geology, 2017
Introduction Granitic rocks are the most abundant rock types in various tectonic settings and they have originated from mantle-derived magmas and/or partial melting of crustal rocks.
Ali Kananian, Fatemeh Ghahramani, Fatemeh Sarjoughian, Jamshid Ahmadian , Kazem Kazemi   +4 more
doaj   +1 more source