Results 41 to 50 of about 27,054 (290)

Ancient stardust in fine-grained chondrule dust rims from carbonaceous chondrites [PDF]

Earth and Planetary Science Letters, 2016
Abstract Carbonaceous chondrites are fragments from primitive parent asteroids, which represent some of the most primitive meteorites accessible for laboratory analysis and offer therefore the best opportunity to explore the chemical and physical conditions in the early Solar System.
Jan Leitner, Christian Vollmer, Christine Floss, Jutta Zipfel, Peter Hoppe   +4 more
openaire   +2 more sources

Superiority of Thiourea Au Extraction from Low Graphiticity Carbonaceous Gold Ores

Journal of MMIJ
Double refractory gold ores (DRGOs), in which few percentages of carbonaceous matter are present and gold grains are encapsulated in sulfides, have been abandoned to develop due to economic loss caused by adsorption of Au(CN)2− on carbonaceous matter ...
Ikumi SUYAMA, Kojo T.KONADU, Keiko SASAKI   +2 more
doaj   +1 more source

The global dust SED: Tracing the nature and evolution of dust with DustEM [PDF]

, 2010
The Planck and Herschel missions are currently measuring the farIR-mm emission of dust, which combined with existing IR data, will for the first time provide the full SED of the galactic ISM dust emission with an unprecedented sensitivity and angular ...
A. Jones, Adamson, Agladze, Arendt, Asplund, Banhart, Bauschlicher, Bernard, Berné, Bohlin, Boudet, Boulanger, Boulanger, Cardelli, Cayrel, Cecchi-Pestellini, Chiar, Chlewicki, Colangeli, Compiègne, D. Paradis, Dartois, Dartois, Dartois, Demyk, Dickinson, Draine, Draine, Draine, Draine, Draine, Draine, Draine, Duley, Duley, Dupac, Dwek, Désert, Désert, Désert, F. Boulanger, Fitzpatrick, Fitzpatrick, Flagey, Flagey, Frisch, Giard, Gillmon, Goto, Greenberg, Hoang, Iatì, J. Le Bourlot, J.-P. Bernard, Jones, Jones, Jones, Jones, Juvela, Jäger, Kalberla, Kemper, Kim, Kim, L. Verstraete, Li, Li, Li, Li, Li, Lillie, M. Compiègne, Malloci, Mathis, Mathis, Mathis, Mathis, Mennella, Mennella, Mennella, Meny, Meyer, Micelotta, Micelotta, Michelsen, Morgan, N. Flagey, N. Ysard, Paradis, Paradis, Petrie, Pety, Pino, Podio, Rachford, Rapacioli, Reynolds, Reynolds, Serra Díaz-Cano, Shetty, Shetty, Siebenmorgen, Sironi, Slavin, Snow, Sofia, Stecher, Steglich, Stepnik, Tielens, Verstraete, Weingartner, Weingartner, Welty, Ysard, Zhukovska, Zubko, Zubko   +117 more
core   +5 more sources

Exploring the dusty Universe

Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2005
Dust is an ubiquitous inhabitant of the interstellar medium, and leaves an unmistakable signature in its optical properties, and physico-chemical evolution.
Borghese, F, Denti, P, Giusto, A, Saija, R, Iati', MA   +4 more
doaj   +1 more source

13C-depleted moissanites in subduction-related rocks: tracers of slab fluids in the Earth’s mantle and a new diamond exploration tool [PDF]

E3S Web of Conferences, 2019
A magnesian low-Ti shoshonite dike intruding Archean Norwegian Terrane includes numerous grains of black, blue and gray moissanite (SiC). Moissanite contains inclusions of native Si, Fe and Al, Fe-Cr carbides, Fe-Cr-Mn alloys and diamond.
Kepezhinskas Pavel, Kepezhinskas Nikita
doaj   +1 more source

THE APPLICATION OF SCANNING ELECTRON MICROSCOPY USING ENERGY- AND WAVELENGTH DISPERSIVE SPECTROMETERS FOR CHEMICAL DATING OF URANIUM MINERALIZATION ON THE EXAMPLE OF CARBONACEOUS SHALES OF THE DABANZHALGA SUITE (EAST SAYAN)

Геодинамика и тектонофизика, 2022
On the one hand, the widespread use of electron microprobe analysis in the version of a scanning electron microscope (SEM) equipped with an energy dispersive spectrometer (EDS) and, on the other hand, the comparability of the metrological characteristics
D. K. Belyanin, N. S. Karmanov, E. V. Airiyants, S. M. Zhmodik   +3 more
doaj   +1 more source

Life Cycle of Dust in the Magellanic Clouds and the Milky Way

, 2014
To a great extent, our understanding of the life cycle of dust is based on the observational and theoretical studies of the Milky Way and the Magellanic Clouds, which will be the topic of this contribution. Over past years, a large volume of observations
Henning, Thomas, Zhukovska, Svitlana
core   +1 more source

Halite and stable chlorine isotopes in the Zag H3-6 breccia [PDF]

, 2004
Zag is an H3-6 chondrite regolith breccia within which we have studied 14 halite grains ?3mm. The purity of the associated NaCl-H2O brine is implied by freezing characteristics of fluid inclusions in the halite and EPMA analyses together with a lack of ...
Banks, D.A., Bridges, J.C., Grady, M.M., Smith, M.   +3 more
core   +1 more source

Evolution of dust extinction curves in galaxy simulation

, 2017
To understand the evolution of extinction curve, we calculate the dust evolution in a galaxy using smoothed particle hydrodynamics simulations incorporating stellar dust production, dust destruction in supernova shocks, grain growth by accretion and ...
Aoyama, Shohei, Hirashita, Hiroyuki, Hou, Kuan-Chou, Nagamine, Kentaro, Shimizu, Ikkoh   +4 more
core   +1 more source

Coordinated analysis of two graphite grains from the CO3.0 LAP 031117 meteorite: First identification of a CO Nova graphite and a presolar iron sulfide subgrain [PDF]

, 2016
Presolar grains constitute remnants of stars that existed before the formation of the solar system. In addition to providing direct information on the materials from which the solar system formed, these grains provide ground-truth information for ...
Amari, S., Floss, C., Gyngard, F., Haenecour, P., Jadhav, M., José Pont, Jordi, Lodders, K., Wang, A.   +7 more
core   +3 more sources