Results 1 to 10 of about 15,098 (153)

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

Trace element geochemistry of ordinary chondrite chondrules: the type I/type II chondrule dichotomy [PDF]

, 2015
We report trace element concentrations of silicate phases in chondrules from LL3 ordinary chondrites Bishunpur and Semarkona. Results are similar to previously reported data for carbonaceous chondrites, with rare earth element (REE) concentrations ...
Alard, Olivier, Gounelle, Matthieu, Jacquet, Emmanuel   +2 more
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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

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

Mixing in the Solar Nebula: Implications for Isotopic Heterogeneity and Large-Scale Transport of Refractory Grains [PDF]

, 2008
The discovery of refractory grains amongst the particles collected from Comet 81P/Wild 2 by the Stardust spacecraft (Brownlee et al. 2006) provides the ground truth for large-scale transport of materials formed in high temperature regions close to the ...
Alan P. Boss, Ali, Amelin, Andreasen, Andrews, Bizzarro, Boss, Boss, Boss, Boss, Boss, Boss, Boss, Brownlee, Ciesla, Ciesla, Cieza, Clayton, Clayton, Desch, Gail, Halliday, Hsu, Inaba, Kitamura, Krot, Krot, Lyons, Matsumura, Merín, Mostefaoui, Nuth, Sakamoto, Shu, Simon, Tachibana, Thrane, Tscharnuter, van Boekel, Vanhala, Yokoyama, Yurimoto   +41 more
core   +1 more source

Volatiles in protoplanetary disks [PDF]

, 2014
Volatiles are compounds with low sublimation temperatures, and they make up most of the condensible mass in typical planet-forming environments. They consist of relatively small, often hydrogenated, molecules based on the abundant elements carbon ...
Bergin, Edwin A., Brittain, Sean, Marty, Bernard, Mousis, Olvier, Oberg, Karin L., Pontoppidan, Klaus M., Salyk, Colette   +6 more
core   +2 more sources

The formation of Jupiter by hybrid pebble-planetesimal accretion [PDF]

, 2018
The standard model for giant planet formation is based on the accretion of solids by a growing planetary embryo, followed by rapid gas accretion once the planet exceeds a so-called critical mass.
Alibert, Yann, Ataiee, Sareh, Benz, Willy, Burn, Remo, Helled, Ravit, Mayer, Lucio, Mordasini, Christoph, Quanz, Sascha P., Schönbächler, Maria, Senecal, Luc, Venturini, Julia   +10 more
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A perspective from extinct radionuclides on a Young Stellar Object: The Sun and its accretion disk

, 2011
Meteorites, which are remnants of solar system formation, provide a direct glimpse into the dynamics and evolution of a young stellar object (YSO), namely our Sun.
Christophe Michel-Lévy M, Das JP, Dauphas N, Grimm RE, Hollenbach DJ, Hudson GB, Hutcheon ID, Jacobsen B, Kita NT, Kleine T, MacPherson GJ, Marc Chaussidon, Mostéfaoui S, Nagashima K, Nagashima K, Nicolas Dauphas, Safronov VS, Tang H, Wetherill GW., Wetherill GW., Yin Q-Z   +20 more
core   +1 more source

Obesity and climate change: co-crises with common solutions

Frontiers in Science
The global obesity crisis involves an unprecedented and rapid change to the human phenotype. Conferring vast levels of avoidable morbidity and mortality at enormous cost, it has proved refractory to previous policy-led action. This article reviews recent
Paul Behrens, Paul Behrens, Catherine M. Champagne, Jason C. G. Halford, Marj Moodie, Joseph Proietto, Guy A. Rutter, Guy A. Rutter, Guy A. Rutter, Guy A. Rutter, Katherine Samaras, Katherine Samaras, Katherine Samaras, Jeff M. P. Holly   +13 more
doaj   +1 more source

Radiogenic power and geoneutrino luminosity of the Earth and other terrestrial bodies through time

, 2020
We report the Earth's rate of radiogenic heat production and (anti)neutrino luminosity from geologically relevant short-lived radionuclides (SLR) and long-lived radionuclides (LLR) using decay constants from the geological community, updated nuclear ...
Enomoto S., Izidoro A., Kruijer T. S., McDonough W. F., McDonough W. F., Sato J., Wipperfurth S. A.   +6 more
core   +1 more source