Results 11 to 20 of about 45,209 (160)

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
core   +2 more sources

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

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

A refractory inclusion with solar oxygen isotopes and the rarity of such objects in the meteorite record

Meteoritics and Planetary Science, 2020
NASA's Genesis mission revealed that the Sun is enriched in 16O compared to the Earth and Mars (the Sun's Δ17O, defined as δ17O–0.52×δ18O, is –28.4 ± 3.6‰; McKeegan et al. 2011). Materials as 16O‐rich as the Sun are extremely rare in the meteorite record.
L. Kööp, K. Nagashima, A. Davis, A. Krot   +3 more
semanticscholar   +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

Refractory inclusions in carbonaceous chondrites: Records of early solar system processes

Meteoritics and Planetary Science, 2019
Chondrites consist of three major components: refractory inclusions (Ca,Al‐rich inclusions [CAIs] and amoeboid olivine aggregates), chondrules, and matrix.
A. Krot
semanticscholar   +1 more source

Collisional stripping of planetary crusts [PDF]

, 2017
Geochemical studies of planetary accretion and evolution have invoked various degrees of collisional erosion to explain differences in bulk composition between planets and chondrites.
Carter, Philip J., Elliott, Tim, Leinhardt, Zoë M., Stewart, Sarah T., Walter, Michael J.   +4 more
core   +3 more sources

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

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
core   +2 more sources

Condensation of refractory minerals on igneous compact type A Ca‐Al‐rich inclusion from Northwest Africa 7865 CV chondrite

Meteoritics & Planetary Science
A melilite‐rich, compact type A Ca‐Al‐rich inclusion (CAI), KU‐N‐02, from the reduced CV3 chondrite Northwest Africa 7865, is mantled by an åkermanite‐poor layer.
A. Suzumura, N. Kawasaki, H. Yurimoto, S. Itoh   +3 more
semanticscholar   +1 more source