Results 41 to 50 of about 22,412 (124)

Aluminum Phyllosilicate and Jarosite Formation Through Alteration of Reworked Al/Si‐Rich Volcaniclastic Sediments in Nili Fossae, Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 8, August 2026.
Abstract Aluminum phyllosilicates occur in 1–10s of km2 exposures of Noachian (∼3.7 Ga) rock across Mars and typically appear stratigraphically above Fe/Mg‐phyllosilicates. These units have been proposed to represent pedogenic basalt weathering sequences.
S. R. Baker, B. L. Ehlmann
wiley   +1 more source

Tracing the main belt origins of S-complex near-Earth objects: From space mission targets to meteorite sources

Astronomy & Astrophysics
Context. Space missions to near-Earth objects (NEOs) provide remarkable opportunities to study and characterise their physical and compositional properties in detail. Interpreting these results in a broader context requires knowledge of their provenance,
Simon P. N., Vernazza P., Marsset M., Brož M., Binzel R. P., DeMeo F., Thomas C. A., Jorda L.   +7 more
doaj   +1 more source

What Earth Erases: Weathering Diversity of Mineral Phases Formed in a Highly Reduced Environment Hosted in Aubrites

Journal of Geophysical Research: Planets, Volume 131, Issue 8, August 2026.
Abstract Meteorites serve as an exceptional source of insight into our planet and the Solar System. Most meteorite fragments were recovered hundreds to thousands of years after their fall, and therefore exhibit varying degrees of terrestrial weathering, which has altered or completely removed weather‐sensitive mineral phases.
M. Kołodziej, B. Pieterek, G. Zieliński, K. Załęski, E. Coy   +4 more
wiley   +1 more source

Geminids are initially cracked by atmospheric thermal stress

Astronomy & Astrophysics
Context. Geminids have the highest bulk density of all major meteor showers and their mechanical strength appears to depend on their mass. They are also the most active annual shower, enabling detailed studies of the dependence of their physical and ...
Henych Tomáš, Borovička Jiří, Čapek David, Vojáček Vlastimil, Spurný Pavel, Koten Pavel, Shrbený Lukáš   +6 more
doaj   +1 more source

Minerals in Iron and Titanium Skeletal Textures in Nakhlites MIL 090030, MIL 090136, MIL 090032, and MIL 03346: Comparative Analysis With Terrestrial Analogues From Canary Islands, Spain

Journal of Geophysical Research: Planets, Volume 131, Issue 8, August 2026.
Abstract The presence of minor minerals is a key factor distinguishing meteorite types, as they provide valuable insights into the formation processes, surface conditions, and evolutionary history of their parent bodies. In Martian nakhlites, one of the most distinctive minor phases is iron‐titanium oxides forming characteristic skeletal textures ...
Leire Coloma, Fernando Alberquilla, Julene Aramendia, Gorka Arana, Ed Cloutis, Juan Manuel Madariaga   +5 more
wiley   +1 more source

Fragmentation and densities of meteoroids [PDF]

, 1992
Photographic observations of meteors carried out in Dushanbe by the method of instantaneous exposure have shown clearly that meteoroids entering the Earth's atmosphere are subjected to different types of fragmentation.
Babadzhanov, Pulat B.
core  

Iron(II) sulphides in cosmic dust: Optical constants depending on iron deficiency and temperature

Astronomy & Astrophysics
Context. Modelling of spectral energy distributions of protoplanetary and debris disks relies on optical constants of the dust components. Iron(II) sulphides are a very likely component of the dust in these objects, and they could influence the dust ...
Kranhold C., Sadeghi A., Harries D., Mutschke H., Vegesna S. V., Langenhorst F., Stanca S. E., Plentz J., Krüger H.   +8 more
doaj   +1 more source

Stardust Mine: A 2024 gabbroic shergottite from Arizona, USA

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1826-1846, August 2026.
Abstract This study provides an initial characterization of Stardust Mine, a fresh gabbroic enriched shergottite collected in Arizona, USA, in September 2024 and is the first Martian meteorite to be unequivocably collected on US soil. Analysis was conducted on the type specimen and finds that Stardust Mine is composed of equal proportions of pyroxene ...
Jennifer T. Mitchell, Natasha R. Stephen, Zsuzsanna P. Allerton, Weiming Ding, Xin‐Yuan Zheng   +4 more
wiley   +1 more source

The meteorite analogs of (65803) Didymos and implications for its origin

Astronomy & Astrophysics
Context. Identifying meteorite analogs of asteroids is key to understanding their origin and evolution, evaluating planetary defense, and exploring potential space resources.
Zhai Ruoyu, Xu Tianyi, Peng Liuming, Khalid Azeem, Li Siyuan, Shu Min, Wu Yunzhao   +6 more
doaj   +1 more source

The Ames impact structure, Oklahoma: New radioisotopic constraints and implications for North American impact chronology

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 2103-2139, August 2026.
Abstract The Ames impact structure (Oklahoma) is thought to have formed during the Ordovician Meteor Event, based on conodont biostratigraphy of its crater fill. Here, U–Pb zircon dates from its impact‐melt portion, conducted using secondary ion mass spectrometry and laser ablation–inductively coupled plasma–mass spectrometry (n = 37 spots), yield a ...
Elizabeth J. Catlos, Andrew F. Parisi, Michael E. Brookfield, Timmons Erickson, Sean P.S. Gulick, Axel K. Schmitt, Daniel F. Stockli, Daniel P. Miggins, Ben Ruchte, Mark Cloos   +9 more
wiley   +1 more source