Results 31 to 40 of about 13,108 (235)

西南日本の熱変成超苦鉄質岩体中のかんらん石と輝石の組成変化に関する覚書 [PDF]

, 2010
This short article presents some diagrams showing the compositional variations of primary and metamorphic olivine, orthopyroxene and clinopyroxene in peridotites and serpentinites from thermally metamorphosed ultramafic complexes in SW Japan. In contrast
Nozaka, Toshio
core   +1 more source

Adjustment errors of sunstones in the first step of sky-polarimetric Viking navigation: studies with dichroic cordierite/ tourmaline and birefringent calcite crystals [PDF]

Royal Society Open Science, 2016
According to an old but still unproven theory, Viking navigators analysed the skylight polarization with dichroic cordierite or tourmaline, or birefringent calcite sunstones in cloudy/foggy weather.
Dénes Száz, Alexandra Farkas, Miklós Blahó, András Barta, Ádám Egri, Balázs Kretzer, Tibor Hegedüs, Zoltán Jäger, Gábor Horváth   +8 more
doaj   +1 more source

Geochemistry and mineral chemistry of pelitic gneiss of Ikare area, southwestern Nigeria

Heliyon, 2021
This study conducts Electron Probe Microanalysis (EPMA), X-ray Fluorescence (XRF) and Laser Ablation Inductively Coupled Plasma Spectrometry (LA-ICP-MS) analysis on the pelitic gneiss of the Basement complex of Nigeria.
Ehitua Julius Oziegbe, Onesmus Ojok Ocan, Gelu Costin, Péter Horváth   +3 more
doaj   +1 more source

The formation of boundary clinopyroxenes and associated glass veins in type B1 CAIs [PDF]

, 2009
We used focused ion beam thin section preparation and scanning transmission electron microscopy (FIB/STEM) to examine the interfacial region between spinel and host melilite for spinel grains in type B1 inclusions from the Allende and Leoville ...
Abreu, Armstrong, Bacon, Barber, Barber, Beckett, Beckett, Beckett, Bernatowicz, Bleiner, Blum, Blum, Bradley, Caillet, Caillet, Cain, Campbell, Clayton, Connolly, Connolly, Connolly, Croat, Daulton, Daulton, Fahey, Floss, Fransolet, Gaetani, Giannuzzi, Giannuzzi, Goresy, Gray, Greshake, Grossman, Grossman, Grossman, Heaney, Hill, Ireland, Ito, Keller, Keller, Kennedy, Kieffer, Komorowski, Kuehner, Kurat, Lee, Lin, Lin, Lundstrom, MacPherson, MacPherson, MacPherson, Marvin, Mendybaev, Nakamura, Nguyen, Obst, Overwijk, Palme, Paque, Paque, Paque, Peters, Prenitzer, Reid, Richter, Richter, Richter, Rives, Simon, Simon, Simon, Simon, Stolper, Stolper, Streck, Stroud, Sylvester, Vidal, Weber, Wei, Wirth   +83 more
core   +1 more source

Statics and dynamics of domain patterns in hexagonal-orthorhombic ferroelastics

, 2000
We study the statics and the dynamics of domain patterns in proper hexagonal-orthorhombic ferroelastics; these patterns are of particular interest because they provide a rare physical realization of disclinations in crystals.
A. C. E. Reid, A. C. E. Reid, A. E. Jacobs, A. E. Jacobs, A. E. Jacobs, A. E. Jacobs, A. Onuki, A. Putnis, B. Yangui, C. Boulesteix, C. Manolikas, C. Manolikas, E. K. H. Salje, G. R. Barsch, J. F. Blackburn, J. F. Blackburn, J. Sapriel, J. Vicens, K. Aizu, K. Fuchizaki, L. D. Landau, R. Sinclair, R. V. Kohn, S. H. Curnoe, S. H. Curnoe, S. R. Shenoy, V. Venkatesh, W. C. Kerr, W. F. Müller, Y. H. Wen, Y. H. Wen, Y. Kitano, Y. Kitano   +32 more
core   +1 more source

Kinetics of specific surface area change using the Boltzmann model [PDF]

Science of Sintering, 2009
During sintering of the 2MgO-2Al2O3-5SiO2 system, cordierite, an attractive ceramic material because of its properties, is obtained. Effects of mechanochemical activation of stoichiometric mixtures, performed to investigate possibilities of lowering ...
Đorđević N., Martinović S., Vlahović M., Jovanić P., Vidojković V., Boljanac T.   +5 more
doaj   +1 more source

Jadeite in Continental Subduction: Its Preservation, Breakdown and Pseudomorphic Replacement in Erzgebirge UHP Gneisses

Journal of Metamorphic Geology, EarlyView.
ABSTRACT The absence of jadeite in regions where subduction of continental crust has been documented by other high‐pressure (HP) or ultrahigh‐pressure (UHP) minerals is striking. This study presents only the second discovery of jadeite in the crystalline rocks of the Erzgebirge, a region known for its occurrences of microdiamond, coesite and omphacite ...
Ondrej Lexa, Martin Racek, Petr Jeřábek, Benjamin Paddon   +3 more
wiley   +1 more source

Emissions control catalysts: links between Fecralloy preoxidation and coating adherence [PDF]

, 2011
Tightening emissions legislation for vehicles across the world has caused the use of monolith catalysts in automobile emission control to become ubiquitous.
Adegbite, Stephen
core   +3 more sources

Variable Sr Diffusion and Implications for Rb–Sr Biotite Geochronology

Journal of Metamorphic Geology, EarlyView.
ABSTRACT The rubidium–strontium (Rb–Sr) system has a long pedigree as a geochronological tool that relies on the application of an isochron approach. In particular, biotite contains strongly radiogenic Rb–Sr isotopes, and thus can yield meaningful crystallisation or cooling ages via this approach. However, the response of the Rb–Sr system in biotite to
Riley Rohrer, Christopher L. Kirkland, Hugo Olierook, Tim Johnson, Katy Evans   +4 more
wiley   +1 more source

P–T Modelling Constrains the Depth of Emplacement of the Porto Azzurro Pluton and Implies Minor Exhumation Caused by the Zuccale Fault (Island of Elba, Italy)

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Understanding the pressure of emplacement of granitic intrusions is crucial to understanding the exhumation history of plutons and constraining the tectonic setting of magma emplacement. However, P–T and geochronological constraints from exhumed plutons are often characterized by large uncertainties, especially in shallow crustal settings with
Samuele Papeschi, Marco Bonini, Matteo Lupi, Chiara Del Ventisette, Domenico Montanari   +4 more
wiley   +1 more source