Results 51 to 60 of about 9,098 (128)

Petrography and Geochemistry of Feldspathic Angkorean Arenites Are Linked to Magnetic Susceptibility and Suggest Different Igneous Sources

Geoarchaeology, Volume 40, Issue 6, November/December 2025.
ABSTRACT Magnetic susceptibility of feldspathic arenites in Angkorean temples has been used to interpret distinct quarry sources. However, magnetic properties can be affected by grain sorting and weathering of magnetic minerals, leaving ambiguity in the interpretations.
Fabian Dellefant, Iuliia V. Sleptsova, Aaron Bufe, Melanie Kaliwoda   +3 more
wiley   +1 more source

The Impact of Accurate Extinction Measurements for X-ray Spectral Models

, 2015
Interstellar extinction includes both absorption and scattering of photons from interstellar gas and dust grains, and it has the effect of altering a source's spectrum and its total observed intensity.
Corrales, Lia, Smith, Randall K., Valencic, Lynne A.   +2 more
core   +1 more source

Infrared optical signature reveals the source-dependency and along-transport evolution of dust mineralogy as shown by laboratory study. [PDF]

Sci Rep, 2023
Di Biagio C, Doussin JF, Cazaunau M, Pangui E, Cuesta J, Sellitto P, Ródenas M, Formenti P.   +7 more
europepmc   +1 more source

Reflected Light from Sand Grains in the Terrestrial Zone of a Protoplanetary Disk

, 2008
We show that grains have grown to ~mm size (sand sized) or larger in the terrestrial zone (within ~3 AU) of the protoplanetary disk surrounding the 3 Myr old binary star KH 15D.
A Isella, A Natta, AP Boss, AT Tokunaga, C Dominik, Catrina M. Hamilton, Christopher M. Johns-Krull, CM Hamilton, CM Hamilton, CM Hamilton, DA Golimowski, E Agol, EI Chiang, J Eisner, JA Johnson, JA Johnson, JA Johnson, JN Winn, JN Winn, Joshua N. Winn, Katherine LeDuc, KE Kearns, Mansur Ibrahimov, N Kusakabe, P Artymowicz, R van Boekel, Reinhard Mundt, SJ Wolk, TH Burbine, W Herbst, William Herbst   +30 more
core   +1 more source

Surface composition and taxonomic classification of a group of near-Earth and Mars-crossing asteroids

, 2013
In the past, constraining the surface composition of near-Earth asteroids (NEAs) has been difficult due to the lack of high quality near-IR spectral data (0.7-2.5 microns) that contain mineralogically diagnostic absorption bands. Here we present visible (
Michelsen, René, Nathues, Andreas, Reddy, Vishnu, Sanchez, Juan A.   +3 more
core   +1 more source

The composition and size distribution of the dust in the coma of comet Hale-Bopp

, 2005
We discuss the composition and size distribution of the dust in the coma of comet Hale-Bopp. We do this by fitting simultaneously the infrared emission spectrum measured by the infrared space observatory (ISO) and the measured degree of linear ...
de Koter, A., Dominik, C., Hovenier, J. W., Min, M., Waters, L. B. F. M.   +4 more
core   +1 more source

Presence of asbestiform minerals in lightweight concretes: their environmental impact [PDF]

, 2015
Lightweight concrete has a lower unit weight than conventional concrete and a high thermal insulation capacity. It is manufactured with either natural or artificial lightweight aggregates. Vermiculite, one of the natural lightweight aggregates used, is a
Bonalumi, Aldo, Lescano, Leticia, Maiza, Pedro, Marfil, Silvina Andrea, Sfragulla, Jorge   +4 more
core  

Yamato 980459: Mineralogy and petrology of a new shergottite-related rock from Antarctica [PDF]

, 2004
Y980459, a new Martian meteorite from Antarctica, is composed of coarse porphyritic olivine grains (up to 2mm) set in the groundmass of olivine and pyroxene with abundant glassy mesostasis containing dendritic olivine and pyroxene.
Chokai,Jun, Koizumi,Eisuke, McKay,Gordon, Mikouchi,Takashi, Miyamoto,Masamichi, Monkawa,Akira, Ueda,Yuji   +6 more
core   +1 more source

Temperature-driven micro-fracturing in granite: The interplay between microstructure, mineralogy and tensile strength. [PDF]

Heliyon, 2023
Alcock T, Bullen D, Benson PM, Vinciguerra S.   +3 more
europepmc   +1 more source

Shocked Quartz in Polymict Impact Breccia from the Upper Cretaceous Yallalie Impact Structure in Western Australia [PDF]

Yallalie is a ~12 km diameter circular structure located ~200 km north of Perth, Australia. Previous studies have proposed that the buried structure is a complex impact crater based on geophysical data.
Bland, Phil A., Cavosie, Aaron J., Cox, Morgan A., Erickson, Timmons M., Ferriere, Ludovic, Hess, Brian, Miljkovic, Katarina, Timms, Nicholas E.   +7 more
core   +1 more source