Results 111 to 120 of about 111,627 (352)

Mid‐infrared detection and characterization of refractory inclusions in CM and CO chondrites: A non‐destructive approach for returned space samples

open access: yesMeteoritics &Planetary Science, Volume 60, Issue 3, Page 544-569, March 2025.
Abstract Refractory inclusions (RIs) in chondrites are widely used as tracers of early solar system formation conditions. In the context of sample‐return missions, a non‐destructive and non‐invasive analytical tool that can rapidly detect and characterize RIs in space samples during their early phase of study is highly needed.
Jean Charlier   +4 more
wiley   +1 more source

Plate Tectonics and Metamorphism: Teaching Complex Systems Using Videos and Animations

open access: yesGeosciences
Metamorphism is a complex geologic process that is often poorly covered in introductory geology courses. This study explores the effectiveness of a video-based instructional intervention in improving student understanding of metamorphism and its ...
Siloa Willis, Robert J. Stern
doaj   +1 more source

VIS‐to‐MIR reflectance and Raman spectroscopy of the CM2 NWA 12184 carbonaceous chondrite

open access: yesMeteoritics &Planetary Science, Volume 60, Issue 3, Page 570-595, March 2025.
Abstract The spectral analysis of CM meteorites can help to constrain the mineralogical composition of their parent body, the C‐type asteroids. The CM2 NWA 12184 was spectrally examined employing seven complementary techniques at different spatial resolutions, including VIS‐to‐MIR reflectance and Raman spectroscopy.
A. Galiano   +15 more
wiley   +1 more source

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

MENDERES MASİFİ'NİN PAN-AFRİKAN TEMEL VE PALEOZOYİK - ERKEN TERSİYER ÖRTÜ SERİLERİNİN POLİMETAMORFİK EVRİMİ

open access: yesBulletin of the Mineral Research and Exploration, 2011
Batı Anadolu'da yüzlek veren Menderes Masifi ana hatlarıyla Geç Alpin sıkışma tektoniği ile biçimlenmiş karmaşık bir tektonik iç yapı sunmaktadır. Bu kristalin kompleksin litostratigrafik istifi; 1-Pan-Afrikan temel (çekirdek serisi) ve 2-Paleozoyik ...
Osman CANDAN   +7 more
doaj  

Nature and origin of fluids in granulite facies metamorphism [PDF]

open access: yes
The various models for the nature and origin of fluids in granulite facies metamorphism were summarized. Field and petrologic evidence exists for both fluid-absent and fluid-present deep crustal metamorphism.
Newton, R. C.
core   +1 more source

On the variations of the elemental composition of the P3 component in presolar diamonds [PDF]

open access: yes, 2004
Analysis of noble gas element variations in the P3 component of presolar diamonds indicates that a special mechanism of element fractionation is required to explain the ...
Fisenko, A. V.   +4 more
core  

Evidence for late impact‐induced metasomatism on the brachinite parent body recorded by a phosphate assemblage in NWA 7828

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Brachinites are a group of ultramafic achondritic meteorites thought to sample a planetesimal from the early inner solar system. They yield predominately ancient crystallization ages within 4 Ma of CAI formation, and while the formation mechanism for these samples is debated, they are widely thought to be partial melt residues from a ...
L. F. White   +7 more
wiley   +1 more source

Snow metamorphism: a fractal approach

open access: yes, 2010
Snow is a porous disordered medium consisting of air and three water phases: ice, vapour and liquid. The ice phase consists of an assemblage of grains, ice matrix, initially arranged over a random load bearing skeleton.
A. D. Frolov   +7 more
core   +1 more source

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