Results 71 to 80 of about 10,085 (234)

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  

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, Luigi Folco, Matteo Masotta, Ana Černok, Enrico Mugnaioli   +4 more
wiley   +1 more source

Variation in the composition of muscovite and albite in a pegmatite dike near Yellowknife

, 1970
Regular and irregular variations were found in the concentration of elements in muscovite and albite in relation to the distance from margin to center of a pegmatite dike near Yellow knife.
Ralph Kretz
core   +1 more source

Metasomatic Replacement of Albite in Nature and Experiments [PDF]

, 2018
Replacement of albite by sodium-rich, secondary phases is a common phenomenon, observed in different geological settings and commonly attributed to alkaline metasomatism.
Kirsten Drüppel, Wirth, Richard, Drüppel, Kirsten, Richard Wirth   +3 more
core   +1 more source

Propiedades termoluminiscentes de una albita de minas Geraes (Brasil)

Boletín de la Sociedad Española de Cerámica y Vidrio, 2004
Albite sodium feldspar is studied by thermoluminescent methods using the blue region of the spectra (circa 400nm) and the possible uses as a dosimeter are explored.
García-Guinea, J., Pitalua, F., Correcher, V., Sánchez-Muñoz, L., Valle-Fuentes, F. J., Lopez-Arce, P.   +5 more
doaj  

Frictional properties of anorthite (feldspar): implications for the lower boundary of the seismogenic zone

Earth, Planets and Space, 2020
Earthquake magnitude is closely related to the depth extent of the seismogenic zone, and higher magnitude earthquakes occur where the seismogenic zone is thicker.
Koji Masuda
doaj   +1 more source

Origin of Albite Porphyroblasts [PDF]

Geological Magazine, 1962
Author9s reply to discussion of a paper on albite porphyroblasts in rocks of western Perthshire, Scotland and continued discussion by A. F. Trendall.
openaire   +1 more source

Coupled plagioclase dissolution and K‐feldspar overgrowth precipitation preserve anomalously high permeability in deeply buried sandstones

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, Huan Li, Wei Wang, Yangdong Gao, Guangrong Peng, Lin Ding, Eric O. Ansah, Pei Liu, Xiaoyan Li, Saju Menacherry, Hongtao Zhu, Xianghua Yang, Zhiwei Zeng   +12 more
wiley   +1 more source

Conditions and timing for the precipitation of early marine diagenetic dolomite in the Triassic Dolomia Principale (northern Italy)

Sedimentology, EarlyView.
ABSTRACT Thermodynamic constraints and empirical evidence often suggest that fabric‐retentive replacement dolomites are stable carbonate minerals that preserve ancient seawater properties. This study evaluates this hypothesis by examining the Upper Triassic Dolomia Principale in Northern Italy.
Vivien Folliot, Giovanna Della Porta, Mathias Mueller, Fabrizio Berra, Benjamin F. Walter, Aratz Beranoaguirre, Sylvia Riechelmann, Oskar Schramm, Adrian Immenhauser   +8 more
wiley   +1 more source

Albite Feldspar Mineral Raman and ATR-IR Fingerprints obtained with q-Gaussian and q-BWF deconvolutions made by means of Fityk Software [PDF]

This work is proposing the fingerprints of Raman and ATR-IR spectra of feldspar Albite minerals. The Raman fingerprints are based on q-Gaussian functions deconvolution, whereas the ATR-IR fingerprints are obtained with q-Gaussian and q-BWF functions ...
Amelia Carolina Sparavigna
core   +1 more source