Results 31 to 40 of about 42,943 (169)

Microtextures and structures in metal–sulfide grains in NWA 869 meteorite and their relation to thermal history of L‐chondrite parent body

open access: yesMeteoritics &Planetary Science, Volume 60, Issue 3, Page 616-631, March 2025.
Abstract Results of microanalysis study of NWA 869 meteorite, an ordinary chondrite, where silicates, Fe‐Ni alloys, and troilite are major constituents, are reported. The presented study of microtextures in metallic and sulfide grains provides information on processes occurring from the asteroid's accretion, through the impacts until cooling.
Paulina Skirak   +4 more
wiley   +1 more source

Mineralogy and Surface Composition of Asteroids

open access: yes, 2015
Methods to constrain the surface mineralogy of asteroids have seen considerable development during the last decade with advancement in laboratory spectral calibrations and validation of our interpretive methodologies by spacecraft rendezvous missions ...
Burbine, Thomas H.   +4 more
core   +1 more source

Rock‐buffered versus fluid‐buffered geochemistry of structurally controlled, hydrothermal dolomite: Insights from the Sichuan Basin, China

open access: yesSedimentology, EarlyView.
ABSTRACT Structurally controlled hydrothermal dolomitization, commonly driven by high‐pressure, high‐temperature fluid–rock reactions, offers insights into the tectonic evolution of sedimentary basins and the geochemical composition of their diagenetic fluids.
Huachuan Jiang   +7 more
wiley   +1 more source

Silica in Protoplanetary Disks

open access: yes, 2008
Mid-infrared spectra of a few T Tauri stars (TTS) taken with the Infrared Spectrograph (IRS) on board the Spitzer Space Telescope show prominent narrow emission features indicating silica (crystalline silicon dioxide).
A. Li   +82 more
core   +1 more source

HD 145263: Spectral Observations of Silica Debris Disk Formation via Extreme Space Weathering?

open access: yes, 2020
We report here time domain infrared spectroscopy and optical photometry of the HD145263 silica-rich circumstellar disk system taken from 2003 through 2014.
Britt, D. T.   +11 more
core   +1 more source

Extinction and optical depth retrievals for CALIPSO's Version 4 data release

open access: yesAtmospheric Measurement Techniques, 2018
. The Cloud–Aerosol Lidar with Orthogonal Polarization (CALIOP) on board the Cloud–Aerosol Lidar Infrared Pathfinder Satellite Observations (CALIPSO) satellite has been making near-global height-resolved measurements of cloud and aerosol layers since mid-
S. Young   +5 more
semanticscholar   +1 more source

Optical properties of photoresists for femtosecond 3D printing: refractive index, extinction, luminescence-dose dependence, aging, heat treatment and comparison between 1-photon and 2-photon exposure

open access: yesOptical Materials Express, 2019
Femtosecond 3D printing has emerged as an important technology for manufacturing nano- and microscopic optical devices and elements. Detailed knowledge of the dispersion in the visible and near-infrared spectral range is crucial for the design of these ...
Michael A. Schmid   +2 more
semanticscholar   +1 more source

Strong Under‐Ice Heating of Central Asian Shallow Lakes

open access: yesGeophysical Research Letters, Volume 52, Issue 14, 28 July 2025.
Abstract Shallow lakes (<2 m depth) of Central Asian, receiving strong solar radiation and low precipitation, are sensitive to atmospheric forcing because of their low heat capacity, yet their under‐ice thermal conditions remain poorly investigated.
Puzhen Huo   +6 more
wiley   +1 more source

Incorporation of H_2 in vitreous silica, qualitative and quantitative determination from Raman and infrared spectroscopy [PDF]

open access: yes, 1998
Incorporation mechanisms of H_2 in silica glass were studied with Raman and infrared (IR) microspectroscopy. Hydrogenated samples were prepared at temperatures between 800 deg C and 955 deg C at 2 kbar total pressure.
Bény, Jean-Michel   +2 more
core   +2 more sources

Atmospheric Convection and Aerosol Absorption Boost Wildfire Smoke Injection

open access: yesGeophysical Research Letters, Volume 52, Issue 14, 28 July 2025.
Abstract Smoke released from increasingly severe wildfires has exerted widening impacts on the climate, ecosystem, and human life. Precisely quantifying these effects requires accurately representing smoke injection height in climate and air quality models.
Rui Xu   +5 more
wiley   +1 more source

Home - About - Disclaimer - Privacy