Results 111 to 120 of about 84,873 (223)

Impact Reactivation of a Hydrothermal System in Basalt in the Vargeão Dome Impact Structure, Brazil

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract As hydrous minerals have been observed in impact craters on Mars, impact‐generated hydrothermal systems (IGHSs) have been considered as potential habitats for life on that planet. The Vargeão Dome, a 12 km wide impact structure in southern Brazil, was formed in basalts with at least two hydrothermal alteration stages.
Jitse Alsemgeest, Fraukje M. Brouwer, Luis F. Auqué, Kirsten van Zuilen, Natalia Hauser, Wolf Uwe Reimold   +5 more
wiley   +1 more source

Microimaging Spectroscopy of Carbonaceous Chondrites and Comparison to the Spectral Diversity of Asteroids

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Primitive asteroids and carbonaceous chondrites (CCs) record the history of processes in the early solar system. Visible and shortwave infrared (VSWIR) spectroscopy of primitive asteroids and bulk‐powdered CCs has identified shared spectral features suggestive of shared parent body origins.
S. A. Parra, R. N. Greenberger, B. L. Ehlmann   +2 more
wiley   +1 more source

Sedimentary Architecture of the Stimson Formation at the Naukluft Plateau, Gale Crater, Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Sedimentary texture, facies, and architecture can be used to reconstruct the palaeoenvironment under which sediments accumulate. On Mars, palaeoenvironmental reconstructions are used to understand ancient Martian atmospheric circulation, surface sedimentary processes, and the presence of water, to provide insight into ancient habitability and ...
Amy E. Dean, Steven G. Banham, Gerhard Paar, Sanjeev Gupta, Joel M. Davis, Ashwin R. Vasavada   +5 more
wiley   +1 more source

Water Vapor Vertical Distribution on Mars After Six Years of TGO/NOMAD Solar Occultations: 2. Cross‐Validation Within TGO and Comparison With MPCM

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract This is the second part of an investigation of water vapor in the Martian atmosphere using solar occultation observations by the Nadir and Occultation for MArs Discovery (NOMAD) spectrometer on board the ExoMars Trace Gas Orbiter. Following the analysis of six Earth years of NOMAD observations performed in the first part, a cross‐validation ...
A. Brines, M. A. López‐Valverde, F. González‐Galindo, S. Aoki, A. Fedorova, D. Belyaev, F. Forget, E. Vos, F. Montmessin, B. Funke, J. J. Lopez‐Moreno, J. Rodriguez‐Gomez, F. Daerden, I. R. Thomas, L. Trompet, A. Modak, G. L. Villanueva, M. R. Patel, G. Bellucci, A. C. Vandaele   +19 more
wiley   +1 more source

Origin of the Bulge Topography Within Caloris Basin, Mercury

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Caloris basin on Mercury has a massive circular bulge topography imprinted with unique fault sets. A variety of deformational processes have been proposed to have influenced their formation, including both global contraction and basin evolution, as well as the deposition and weight of the volcanic infill.
G. Schmidt, V. Galluzzi, A. Sepe, S. Buoninfante, B. De Toffoli, L. Ferranti, P. Palumbo   +6 more
wiley   +1 more source

Characteristics of Natural Remanence Records in Fine‐Grained Particles Returned From Asteroid Ryugu

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Particles collected from the asteroid Ryugu by the Hayabusa2 spacecraft offer a unique opportunity to investigate the magnetic record of the primitive solar system, as any terrestrial magnetic contamination is minimal and can be accounted for.
Masahiko Sato, Yuki Kimura, Tadahiro Hatakeyama, Tomoki Nakamura, Satoshi Okuzumi, Sei‐ichiro Watanabe, Seiji Sugita, Satoshi Tanaka, Shogo Tachibana, Hisayoshi Yurimoto, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Fuyuto Terui, Satoru Nakazawa, Yuichi Tsuda   +27 more
wiley   +1 more source

Lens Modeling of STRIDES Strongly Lensed Quasars Using Neural Posterior Estimation

The Astronomical Journal
Strongly lensed quasars can be used to constrain cosmological parameters through time-delay cosmography. Models of the lens masses are a necessary component of this analysis.
Sydney Erickson, Sebastian Wagner-Carena, Phil Marshall, Martin Millon, Simon Birrer, Aaron Roodman, Thomas Schmidt, Tommaso Treu, Stefan Schuldt, Anowar J. Shajib, Padma Venkatraman, The LSST Dark Energy Science Collaboration   +11 more
doaj   +1 more source

Tracing a Wet Past and Diverse Provenances in Gale Crater, Mars, With Lithium Content Using ChemCam on the Curiosity Rover

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract The incompatible behavior of Lithium during magmatic differentiation and high mobility during aqueous alteration make it a valuable tracer of crustal processes on Mars. Its preferential incorporation into secondary phyllosilicates further links Li to clay‐forming environments, which are critical for evaluating past aqueous activity and ...
K. W. Nikolajsen, J. Frydenvang, E. Dehouck, R. C. Wiens, P. J. Gasda, L. Le Deit, G. Caravaca, C. C. Bedford, A. Ollila, A. Cousin, S. Maurice, O. Gasnault, N. L. Lanza   +12 more
wiley   +1 more source

Obscuration of Crystalline Ca‐Sulfate in XRD and Raman Data When Coated by Amorphous Ferric Sulfate: Implications for the Amorphous Components at Gale Crater

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Throughout Gale crater on Mars, the Curiosity rover has found high abundances (15–73 wt%) of X‐ray amorphous materials in the rocks and sediments. The composition of this amorphous fraction is primarily calculated by subtracting crystalline abundances measured by the Chemistry & Mineralogy X‐Ray Diffractometer (CheMin) from bulk elemental ...
R. J. Hopkins, A. D. Rogers, L. Ehm
wiley   +1 more source

A Study on CO2 ${\text{CO}}_{2}$ Supersaturation in the Martian Southern Polar Night Using Mars Global Surveyor Radio Occultation Profiles Rederived With Mars Climate Sounder Temperature Climatology

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract We investigate CO2 ${\text{CO}}_{2}$ supersaturation in the Martian southern polar night using rederived vertical profiles from Mars Global Surveyor (MGS) radio occultation (RO) measurements. Supersaturation, which affects not only local condensation but also the polar and global atmospheric dynamics, occurs when temperatures fall below the ...
Katsuyuki Noguchi, Armin Kleinböhl, Sylvain Piqueux   +2 more
wiley   +1 more source