Results 141 to 150 of about 73,396 (320)

Isotopic analysis of tochilinite (carbonate and magnetite) in Winchcombe: Temperature constraints on early‐stage aqueous alteration in the CM parent body

Meteoritics &Planetary Science, EarlyView.
Abstract We report the first oxygen isotope measurements of tochilinite (δ17O: 11.0 ± 2.1‰, δ18O: 23.5 ± 4.0‰ and Δ17O: −1.1 ± 1.2‰) in a CM chondrite (Winchcombe, lithology C [CM2.2/2.3]). We analyzed type‐I tochilinite‐cronstedtite intergrowths (TCIs)—formed by pseudomorphic replacement of kamacite.
M. D. Suttle, R. Findlay, I. A. Franchi, C. Biagioni, X. Zhao, F. A. J. Abernethy, L. Riches, L. Folco   +7 more
wiley   +1 more source

Olivine structure of cadmium ortho-germanate [PDF]

, 1965
P. Tarte
openalex   +1 more source

The nature and formation of silica minerals in eucrite meteorites: Insight into the protoplanetary magma crystallization

Meteoritics &Planetary Science, EarlyView.
Abstract Silica polymorphs in meteorites provide critical constraints on crystallization processes associated with thermal activity in the early solar system. A detailed investigation of silica polymorphs in eucrites (the largest group of achondrites) using cathodoluminescence imaging and laser‐Raman spectroscopy revealed significant variations in the ...
Rei Kanemaru, Akira Yamaguchi, Naoya Imae, Ryoga Maeda, Makoto Kimura, Kenji Horie, Takashi Mikouchi, Masaaki Miyahara, Masahiro Yasutake, Atsushi Takenouchi, Haruka Ono, Aiko Nakato, Junko Isa, Tomohiro Usui, Hirotsugu Nishido   +14 more
wiley   +1 more source

Dynamic Recrystallization of Olivine During Simple Shear: Evolution of Microstructure and Crystallographic Preferred Orientation From Full‐Field Numerical Simulations

Geochemistry, Geophysics, Geosystems
Upper mantle deformation is mainly controlled by the mechanical behavior of olivine. Crystallographic preferred orientations (CPOs) develop in olivine due to crystal‐plastic deformation during mantle flow, where the a‐axes of olivine polycrystalline ...
Y. Yu, A. Griera, E. Gomez‐Rivas, P. D. Bons, D. García‐Castellanos, B. Hao, R. A. Lebensohn, M.‐G. Llorens   +7 more
doaj   +1 more source

Distribution of iron between coexisting olivines and calcium-poor pyroxenes in peridotites, gabbros, and other magnesian environments [PDF]

, 1963
M. J. O’Hara
openalex   +1 more source

Löpönvaara: A new phosphorus‐rich iron meteorite from Finland

Meteoritics &Planetary Science, EarlyView.
Abstract Löpönvaara is a rare new phosphorus‐rich iron meteorite find from Löpönvaara, Finland. The ~164 g meteorite was discovered in 2017 from the same area as the ungrouped Lieksa pallasite. Löpönvaara was classified as an ungrouped iron meteorite due to its unusually high concentration of P (>4 wt%), coupled with a moderate concentration of Ni (~11 
Laura Kotomaa, Markku Väisänen, Jussi S. Heinonen, Ermei Mäkilä, Hugh O'Brien, Arto Peltola   +5 more
wiley   +1 more source

Three‐dimensional morphological analysis of Chang'e‐5 lunar soil using deep learning‐automated segmentation on computed tomography scans

Computer-Aided Civil and Infrastructure Engineering, EarlyView.
Abstract Grain morphology is a fundamental characteristic of lunar soil that influences its mechanical properties, sintering behavior, and in situ resource utilization. However, traditional two‐dimensional imaging methods are time‐consuming and lack full three‐dimensional (3D) structural information. This study presents an automated deep learning‐based
Siqi Zhou, Yu Jiang, Xinyang Tao, Feng Li, Chi Zhang, Wei Yang, Yangming Gao   +6 more
wiley   +1 more source

An Olivine-Bearing Hornfels from South-Eastern Queensland—A Correction [PDF]

, 1961
Evan R. Phillips
openalex   +1 more source

Fe Oxidation State and Oxygen Isotope Composition of Diverse Metasomatized Peridotite Rocks

Terra Nova, EarlyView.
ABSTRACT Metasomatic fluids are thought to be oxidising agents that react with the surrounding mantle rocks, causing changes in the bulk Fe3+/ΣFe, their redox state, and affecting the partitioning of trace elements and the fractionation of O isotopes. Worldwide distributed metasomatized peridotites represent the ideal case study to investigate the role
Federica Benedetti, Giulia Marras, Enrico Cannaò, Gianluca Bianchini, Daniele Brunelli, Luigi Dallai, Vincenzo Stagno   +6 more
wiley   +1 more source

Structural Evolution of Olivine during Mechanochemically Assisted Mineral Carbonation under CO₂ Flow

Inorganics
The mechanism of the mechanically assisted mineral carbonation of commercial olivine under the flow of a carbon dioxide (CO2)/nitrogen (N2) mixture has been elucidated by ex situ powder X-ray diffraction and Fourier-transform infrared spectroscopy.
Costantino Cau, Alessandro Taras, Gabriele Masia, Laura Caggiu, Stefano Enzo, Sebastiano Garroni, Fabrizio Murgia, Gabriele Mulas   +7 more
doaj   +1 more source