Results 71 to 80 of about 9,742 (201)
A Microkrystite from the Australasian Tektite/Microtektite Strewn Field
Meteoritics &Planetary Science, EarlyView.Abstract Microkrystites are glassy impact spherules. They contain primary crystallites carrying information on the physical and chemical conditions prevailing during vaporization, melting, and ejection in large impact cratering events. We report on the geochemistry and mineralogy down to nanometer scale of the first microkrystite (ODP1144A,14) from the
Matteo Del Rio +4 more
wiley +1 more source
Sedimentology, EarlyView.ABSTRACT This study investigated the formation mechanism responsible for anomalously high permeability (AHP) observed in the Eocene sandstones at depths from 3824 to 3832 m in the Huizhou Sag, Pearl River Mouth Basin, China, using helium porosity and permeability measurements, thin section, scanning electron microscopy, electron probe X‐ray ...
Changgui Xu +12 more
wiley +1 more source
Albitization of granitic rocks: The mechanism of replacement of oligoclase by albite
, 2008 Large-scale metasomatic albitization in the albitite terranes of the Bamble sector of southeastern Norway has affected both mafic and granitic lithologies.
Fitz Gerald, J. +3 more
core +2 more sources
Petrology of blueschist facies metamorphic rocks of the Meliata Unit [PDF]
Acta Montanistica Slovaca, 1997 Meliata blueschists originated from basalts, limestones, pelites, psammitic and amphibolite facies basement rocks. Compositionally, the metabasalts have a geochemical signature mostly indicative of a transitional arc-MORB origin, but some mafic rocks ...
Faryad Shah Wali
doaj
Série d'abaques permettant la détermination rapide des feldspaths maclés albite
, 1950 Après un bref rappel de la méthode de Nieuwenkamp pour la détermination optique des feldspaths maclés, l'auteur montre que dans le cas des feldspaths maclés albite, la détermination peut être rendue très rapide.
Laffitte, Pierre
core +1 more source
Encontros Bibli, 2011 Analisa o uso da microfilmagem e da digitalização para a preservação e acesso de documentos em arquivos. Apresenta como algumas instituições internacionais na área estão lidando com a questão.
Sérgio Conde de Albite Silva
doaj
Terra Nova, Volume 38, Issue 5, Page 306-313, October 2026.ABSTRACT Significant porosity of more than 5% was found at depths of more than 8500 m in poorly sorted, calcareous mudstones of the Malmian Mikulov Formation. These overpressured rocks are the main hydrocarbon source rock in the Vienna Basin. Core samples from present‐day depths of 8150 m to 8550 m were analysed using X‐ray diffraction and scanning ...
Susanne Gier +3 more
wiley +1 more source
, 1974 There is abundant evidence of a composition gap in the plagioclase series at relatively low temperatures between nearly pure NaAlSi₃O₈ and a more calcic plagioclase in the range Ab₈₀An₂₀ to Ab₇₀An₃₀.
Orville, Philip
core +1 more source
High-pressure Raman spectroscopy on low albite [PDF]
, 2017 The pressure dependence of the Raman spectrum of low albite, NaAlSi3O8, has been investigated from 0.0001 to 10.4 GPa, at room temperature, on a single crystal compressed hydrostatically in a diamond anvil cell.
L. Mantovani +13 more
core +1 more source
Rapid Communications in Mass Spectrometry, Volume 40, Issue 18, 30 September 2026.ABSTRACT Rationale Approximately 3–4 kg of NBS 19 limestone, prepared in 1982 by the U.S. Geological Survey (USGS), serves as a primary reference for the carbon isotope scales VPDB and VPDB‐LSVEC and the oxygen isotope scale VPDB. Its consensus values are +1.95‰ for δ13C and −2.2‰ for δ18O measurements.
Haiping Qi +3 more
wiley +1 more source