Results 71 to 80 of about 662 (146)

Vanadium Isotopic Compositions of the High‐3He/4He Baffin Island Lavas

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract The isotopic composition of vanadium (V) in hotspot lavas provides new insight into the source of deep mantle heterogeneities. We measured V isotopic compositions in Paleogene Baffin Island lavas, which erupted above the Iceland plume head, to constrain the mantle plume source. These lavas have V isotopic compositions that are lighter (−0.96 ± 
Jonas Kaare‐Rasmussen, Forrest Horton, Maureen Auro, Andy W. Heard, Sune G. Nielsen   +4 more
wiley   +1 more source

Comparisons of insect and pathogen leaf damage on early Eocene <i>Eucalyptus</i> (Myrtaceae) from Patagonia and extant Australasian gum trees. [PDF]

PhytoKeys
Giraldo LA.
europepmc   +1 more source

Basal Force Probability Distributions in Thin‐Layer Granular Flows

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 8, August 2026.
Abstract Extreme geophysical flows, such as granular and debris flows, can significantly shape the landscape in steep lands and generate seismic signals that can be recorded over long distances. However, direct field measurements needed to constrain the granular physics remain difficult due to the damage potential of those flows.
Jun Fang, Hui Tang, Yifei Cui, Jens M. Turowski, Lu Jing, Clarence Edward Choi   +5 more
wiley   +1 more source

Mineralogical evidence for hydrothermal alteration of Bennu samples. [PDF]

Nat Geosci
Zega TJ, McCoy TJ, Russell SS, Keller LP, Gainsforth Z, Singerling SA, Manga VR, Harrison C, Libourel G, Prince BS, Thomas-Keprta K, King A, Portail M, Guigoz V, Tu V, Le L, Thompson M, Benner MC, Kerrison NA, Barnes JJ, Ong I, Haenecour P, Chaves L, Smith L, Kontogiannis M, Vega Santiago N, Hill D, Zeszut Z, Domanik K, Chang YJ, Corrigan CM, Ray S, Wardell LR, Gooding T, Rose TR, Bates HC, Schofield PF, Almeida NV, Salge T, Najorka J, Seifert LB, Lunning N, Righter K, Nguyen AN, Brenker FE, Eckley SA, Dworkin JP, Jones RH, Sandford SA, Marcus MA, Bechtel HA, Dominguez G, Yurimoto H, Kawasaki N, Bajo K, Sakamoto N, Zanetta PM, Tachibana S, Busemann H, Hamilton VE, Franchi IA, Grady M, Greenwood RC, Tait K, Timms N, Bland P, Jourdan F, Reddy SM, Rickard W, Saxey D, Vincze L, Connolly HC, Lauretta DS.   +72 more
europepmc   +1 more source

Automated Mineral Identification and Rock‐Type Classification of Lunar Mare Basalts Using SEM Images

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 4, August 2026.
Abstract We present an automated system for identifying minerals and classifying rock types in Apollo lunar mare basalts using scanning electron microscopy (SEM) imagery. Mineral segmentation is based on a U‐Net architecture, supplemented by two scale‐aware models designed to incorporate pixel size information.
Ji‐In Jung, Sonia M. Tikoo, Jaehong Chung, Claire I. O. Nichols   +3 more
wiley   +1 more source

Robust and automatic beamstop shadow outlier rejection: combining crystallographic statistics with modern clustering under a semi-supervised learning strategy. [PDF]

Acta Crystallogr D Struct Biol
Gao Y, Ginn HM, Thorn A.
europepmc   +1 more source

Supervised Machine Learning Approach to Iron Meteorite Classification Using Random Forest: A Predictive Model to Classify Ungrouped Irons

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract Iron meteorites provide insight into the formation processes of planetary cores from the early Solar System. Through further classifying individual irons into specific groups, which are assumed to represent a common parent body, greater information can be yielded into the formation processes of those bodies.
A. F. Rogers, L. Doucet, L. V. Forman, K. Rankenburg, G. K. Benedix   +4 more
wiley   +1 more source

A Mixed Methods Evaluation of Pharmacists' Readiness to Provide Long-Acting Injectable HIV Pre-exposure Prophylaxis in California. [PDF]

J Acquir Immune Defic Syndr
Beltran RM, Beltran RM, Hunter LA, Packel LJ, De Martini L, Holloway IW, Dong BJ, Lam J, McCoy SI, Ochoa AM.   +9 more
europepmc   +1 more source

Experimental Constraints on the Formation of Niningerite and Oldhamite Under Highly Reducing Conditions: Implications for Sulfide Formation in EH3 Chondrites

Journal of Geophysical Research: Planets, Volume 131, Issue 8, August 2026.
Abstract Enstatite chondrites record highly reducing conditions in the early solar nebula, yet the origin of their abundant sulfides remains unclear. Niningerite (MgS) and oldhamite (CaS) are ubiquitous in EH3 enstatite chondrites and distinguish them from other chondrite groups.
N. Imae
wiley   +1 more source

A new crystal form of the DNA-free full-length XPD helicase from Thermoplasma acidophilum. [PDF]

Acta Crystallogr F Struct Biol Commun
Bravo M, Fan L.
europepmc   +1 more source