Catálogo de publicaciones - revistas
American Mineralogist
Resumen/Descripción – provisto por la editorial
No disponible.
Palabras clave – provistas por la editorial
No disponibles.
Disponibilidad
| Institución detectada | Período | Navegá | Descargá | Solicitá |
|---|---|---|---|---|
| No detectada | desde feb. 1998 / hasta dic. 2023 | GeoScienceWorld |
Información
Tipo de recurso:
revistas
ISSN impreso
0003-004X
ISSN electrónico
1945-3027
País de edición
Estados Unidos
Fecha de publicación
1916-
Cobertura temática
Tabla de contenidos
doi: 10.2138/am-2022-8429
High-temperature phase relations of hydrous aluminosilicates at 22 GPa in the AlOOH-AlSiO3OH system
Palabras clave: Geochemistry and Petrology; Geophysics.
Pp. No disponible
doi: 10.2138/am-2022-8580
Thermal expansion of minerals in the tourmaline supergroup
Palabras clave: Geochemistry and Petrology; Geophysics.
Pp. No disponible
doi: 10.2138/am-2022-8381
A shallow salt pond analog for aqueous alteration on ancient Mars: Spectroscopy, mineralogy, and geochemistry of sediments from Antarctica’s Dry Valleys
Palabras clave: Geochemistry and Petrology; Geophysics.
Pp. No disponible
doi: 10.2138/am-2022-8410
Single-crystal X-ray diffraction of fluorapatite to 61 GPa
Palabras clave: Geochemistry and Petrology; Geophysics.
Pp. No disponible
doi: 10.2138/am-2022-8527
Pyrite geochemistry in a porphyry-skarn Cu (Au) system and implications for ore formation and prospecting: Perspective from Xinqiao deposit, Eastern China
Palabras clave: Geochemistry and Petrology; Geophysics.
Pp. No disponible
doi: 10.2138/am-2022-8392
Microchemistry and magnesium isotope composition of the Purang ophiolitic chromitites (SW Tibet): New genetic inferences
Palabras clave: Geochemistry and Petrology; Geophysics.
Pp. No disponible
doi: 10.2138/am-2022-8434
The iron spin transition of deep nitrogen-bearing mineral Fe3N1.2 at high pressure
Palabras clave: Geochemistry and Petrology; Geophysics.
Pp. No disponible
doi: 10.2138/am-2022-8453
Hydrothermal fluid signatures of the Yulong porphyry Cu-Mo deposit: Clues from the composition and U-Pb dating of W-bearing rutile
Palabras clave: Geochemistry and Petrology; Geophysics.
Pp. No disponible
doi: 10.2138/am-2022-8541
Viscosity of Earth’s inner core constrained by Fe–Ni interdiffusion in Fe–Si alloy in an internal-resistive-heated diamond anvil cell
Palabras clave: Geochemistry and Petrology; Geophysics.
Pp. No disponible
doi: 10.2138/am-2022-8025
Estimating kaolinite crystallinity using near-infrared spectroscopy: Implications for its geology on Earth and Mars
Maxime Pineau
; Maximilien Mathian; Fabien Baron; Benjamin Rondeau; Laetitia Le Deit; Thierry Allard; Nicolas Mangold
<jats:title>Abstract</jats:title> <jats:p>Kaolinite is an Al-rich phyllosilicate commonly observed on Earth as a product of the chemical weathering of aluminosilicates. It has also been detected on the martian surface by orbital remote sensing observations. While the determination of the geological processes of formation of terrestrial kaolinite (i.e., hydrothermal activity, continental surface weathering, diagenesis) involves the coupling of field observation and multiple laboratory measurements, only geomorphology and associated minerals are generally available to determine their geological origin on Mars. Kaolinite crystallinity depends on many physicochemical parameters reflecting its conditions of crystallization. To determine if the near-infrared (NIR) spectral signature of kaolinite enables estimation of its crystallinity and furthermore if this method can be used to identify the geological processes involved in kaolinite formation, we carried out an in-depth analysis of NIR spectra of reference terrestrial kaolinites that formed in various geological contexts. We calculated second and third derivatives for each spectrum to highlight subtle variations in the spectral properties of kaolinite. This allowed the identification of 27 spectral contributions for the 4500 and 7000 cm−1 Al-OH-related regions of absorption bands. The position shifts and shape variations of these spectral contributions were intimately linked to variations of crystallinity, which was qualitatively estimated using Hinckley and Liétard XRD (dis)order indices. The results obtained show that the NIR signature of kaolinite is influenced by the stacking disorder of layers that has some influence on the vibrations of the interfoliar and inner Al-OH groups. Our study also confirms that: (1) well-ordered kaolinites are not restricted to hydrothermal deposits; (2) kaolinites from a similar sedimentary or pedogenetic context often display contrasting degrees of crystalline order; and (3) poorly ordered kaolinites are more likely to have a sedimentary or pedogenetic origin. Finally, this work highlights that obtaining spectra with sufficient spectral resolution could help to estimate the crystallinity of kaolinite and, in the best cases, its geological origin, both on Earth and Mars, especially with in situ NIR measurements.</jats:p>
Palabras clave: Geochemistry and Petrology; Geophysics.
Pp. 1453-1469