Results 51 to 60 of about 2,908 (168)

Microfluidic immersion freezing of binary mineral mixtures containing microcline, montmorillonite, or quartz [PDF]

Atmospheric Chemistry and Physics
Mineral dusts are among the most active ice-nucleating particles present in cloud droplets, with their properties influencing radiative properties and precipitation formation.
N. Shardt, N. Shardt, F. N. Isenrich, J. Nette, C. Dreimol, C. Dreimol, N. Ma, Z. A. Kanji, A. J. deMello, C. Marcolli   +9 more
doaj   +1 more source

Alkali-silica reaction (ASR) - Investigation of crystallographic parameters of natural sands by backscattered electron diffraction

Revista IBRACON de Estruturas e Materiais, 2021
: This study involved analyzing several natural sands to ascertain the possible causes for distress due to ASR. The analyses were performed using the following techniques: X-ray diffractometry, accelerated mortar bar tests (AMBT), electron backscattering
Kleber Franke Portella, Leonardo Evangelista Lagoeiro, Jeferson Luiz Bronholo, Dayane de Cristo Miranda, Mariana D’Orey Gaivão Portella Bragança, Bruna Gomes Dias, Nicole Pagan Hasparyk, Selmo Chapira Kuperman   +7 more
doaj   +1 more source

Surface ages of alluvial fans in the southern Central Andes recorded by ground‐ and space‐based hyperspectral reflectance

Earth Surface Processes and Landforms, Volume 51, Issue 8, August 2026.
Secondary weathering of alluvial‐fan surfaces records the relative, and even absolute, ages of deposited sediments up to 300 ka. Hyperspectral imagery quantifies evolving mineral‐weathering pathways to unlock high‐resolution mapping and dating of these sedimentary landscapes.
Henry T. Crawford, Mitch K. D'Arcy, Andreas Ruby, Ana Laura Martínez López, Philippa J. Mason, Taylor F. Schildgen, Ricardo N. Alonso   +6 more
wiley   +1 more source

Ductile and Brittle Rio Grande Rift Deformation in Oligocene Granite Records a Two‐Stage Rift History in Southern Colorado

Tectonics, Volume 45, Issue 8, August 2026.
Abstract The timing and nature of early deformation in the Rio Grande Rift remains poorly constrained. We present evidence for the earliest structural signature of rift extension in the Sangre de Cristo Range, southern Colorado, based on new geologic mapping, structural analysis, rock magnetic data, and thermochronology. These analyses focus on the ∼30.
Samantha Malavarca, John Singleton, Mark Hudson, Gabrielle Ursin, Jeffrey M. Rahl, Martin Wong, Miriam Primus, Hunter Broeder   +7 more
wiley   +1 more source

Microcline - dng

RAW photogrammetry captures in .dng file format. Location of specimen collection: Norway, Oxford County, Maine, USA. http://minecat.rc.fas.harvard.edu/objects/55951/microcline?ctx=7e62ca38-765f-4896-a8c5-283c70d8431a&idx=
Kellie, Adam
core   +1 more source

Exhumation History of the Sangre de Cristo Range, Colorado, From Mid‐ to Low‐Temperature Thermochronology: New Insights Into Laramide Contraction and Oligocene–Miocene Extension in the Northern Rio Grande Rift, USA

Tectonics, Volume 45, Issue 8, August 2026.
Abstract The Sangre de Cristo Range in southern Colorado records a complex tectonic history that includes Late Cretaceous–Eocene Laramide contraction and Oligocene–Quaternary Rio Grande rift extension. We present new thermochronologic data (40Ar/39Ar, fission‐track, (U‐Th)/He) and thermal history models that provide insight into this polyphase history ...
John Singleton, Samantha Malavarca, Alexis K. Ault, Omar Ghamedi, M. Cole Sitar, Paul O’Sullivan, Martin Wong, Jonathan Saul Caine, James Metcalf, Dylan Frawley, Jeffrey M. Rahl   +10 more
wiley   +1 more source

Amazonite Microcline - dng

RAW photogrammetry captures in .dng file format. Location of specimen collection: Florissant, Teller Co., Colorado, USA http://minecat.rc.fas.harvard.edu/objects/116507/microcline?ctx=08786542-2569-4e7f-8222-17d3abcc4ae8&idx=
Kellie, Adam
core   +1 more source

K-metasomatism of plagioclase to produce microcline megacrysts in the Cathedral Peak granodiorite, Sierra Nevada, California, USA [PDF]

, 2001
Higgins (1999) proposed that microcline megacrysts in the Cathedral Peak granodiorite resulted from Ostwald ripening in which textural coarsening of earlier formed small K-feldspar crystals were sacrificed to feed the growth of a select few larger ...
Collins, Barbara J., Collins, Lorence G.
core   +1 more source

Ionoluminiscencia de silicatos de utilización en cerámica a temperaturas criogenicas

Boletín de la Sociedad Española de Cerámica y Vidrio, 2004
Requirements on accurate physical properties need new characterization techniques for structural defects. The use of light ions such as H+ and He+ with MeV energies allows penetration to a depth of several microns in most materials producing strong ...
García-Guinea, J., Hole, D., Finch, A., Correcher, V., Valle-Fuentes, F. J., Can, N., Townsend, P. D.   +6 more
doaj  

First-Principles Study of the Structural Evolution of Microcline Under High Pressure

Crystals
Microcline is an important rock-forming mineral in the Earth’s crust, and characterizing its structural behavior under compression is essential for understanding the high-pressure response of feldspar minerals under geological conditions.
Baoyun Wang, Meisu Xiang
doaj   +1 more source