Results 31 to 40 of about 27,724 (241)

PHYSICO-CHEMICAL PARAMETERS OF MINERAL-FORMING PROCESSES IN PEGMATITES OF THE ILMENOGORSK ALKALINE COMPLEX (SOUTH URALS) AND ALTAI-SAYANY REGION (SOUTH SIBERIA) [PDF]

Минералогия, 2020
The conditions of mineral formation in non-granite pegmatites of the Urals and Siberia are examined. The physico-chemical parameters of the crystallization of minerals in miaskite-pegmatites of the Ilmenogorsk alkaline complex (South Urals) and ...
V.A. Simonov
doaj   +1 more source

The structure and petrology of the Cnoc nan Cuilean Intrusion, Loch Loyal Syenite Complex, NW Scotland [PDF]

, 2013
In NW Scotland, several alkaline intrusive complexes of Silurian age intrude the Caledonian orogenic front. The most northerly is the Loch Loyal Syenite Complex, which is divided into three separate intrusions (Ben Loyal, Beinn Stumanadh and Cnoc nan ...
Goodenough, Kathryn M., Gunn, A. Gus, Hughes, Hannah S.R., Lacinska, Alicja, McCormac, Michael, Walters, Abigail S.   +5 more
core   +3 more sources

Zoned Pyroxenes as Prospectivity Indicators for Magmatic Ni-Cu Sulfide Mineralization

Frontiers in Earth Science, 2020
Small intrusions dominated by olivine- and pyroxene-rich cumulates are well known to be favorable hosts to magmatic Ni-Cu-(Platinum Group Element—PGE) sulfide mineralization.
Louise Schoneveld, Stephen J. Barnes, Hannu V. Makkonen, Margaux Le Vaillant, David J. Paterson, Valentina Taranovic, Kai-Yuan Wang, Kai-Yuan Wang, Ya-Jing Mao   +8 more
doaj   +1 more source

Hydrogen Diffusion in Clinopyroxene at Low Temperatures (195°C–400°C) and Consequences for Subsurface Processes

Geochemistry, Geophysics, Geosystems, 2022
Studying diffusion of hydrogen in nominally anhydrous minerals, like clinopyroxene, at low temperatures is a challenging task due to experimental and analytical difficulties.
Thilo Bissbort, Kendra J. Lynn, Hans‐Werner Becker, Sumit Chakraborty   +3 more
doaj   +1 more source

Magmatic Processes at Euganean Hills (Veneto Volcanic Province, Italy): Clinopyroxene Investigation to Unravel Magmatic Interactions

Geosciences, 2022
The Euganean Hills (NE Italy) magmatic district represents the final volcanic activity of the Veneto Volcanic Province. Alkaline to subalkaline magmatic suite dominated by intermediate to felsic volcanic rocks characterises the latest volcanic activity ...
Sabrina Nazzareni, Daniele Morgavi, Maurizio Petrelli, Omar Bartoli, Diego Perugini   +4 more
doaj   +1 more source

Impulsive supply of volatile-rich magmas in the shallow plumbing system of Mt. Etna volcano [PDF]

, 2018
Magma dynamics at Mt. Etna volcano are frequently recognized as the result of complex crystallization regimes that, at shallow crustal levels, unexpectedly change from H2O -undersaturated to H2O-saturated conditions, due to the impulsive and irregular ...
Gaeta, Mario, Mollo, Silvio, Palladino, Danilo Mauro, Perinelli, Cristina, Pia De Cristofaro, Serena, Scarlato, Piergiorgio   +5 more
core   +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

Thermobar: An open-source Python3 tool for thermobarometry and hygrometry

Volcanica, 2022
We present Thermobar, a new open-source Python3 package for calculating pressures, temperatures, and melt compositions from mineral and mineral-melt equilibrium.
Penny Wieser, Maurizio Petrelli, Jordan Lubbers, Eric Wieser, Sinan Ozaydin, Adam Kent, Christy Till   +6 more
doaj   +1 more source

Temperature effects on the 15-85-micron spectra of olivines and pyroxenes [PDF]

, 2001
Far-infrared spectra of laboratory silicates are normally obtained at room temperature even though the grains responsible for astronomical silicate emission bands seen at wavelengths >20 micron are likely to be at temperatures below ~150 K.
A. M. Hofmeister, C. Lee, C. Tucker, Hofmeister, Hofmeister, J. E. Bowey, M. J. Barlow, P. A. R. Ade   +7 more
core   +2 more sources

Partial Melting of Lower Oceanic Crust Gabbro: Constraints From Poikilitic Clinopyroxene Primocrysts

Frontiers in Earth Science, 2018
Successive magma batches underplate, ascend, stall and erupt along spreading ridges, building the oceanic crust. It is therefore important to understand the processes and conditions under which magma differentiates at mid ocean ridges.
Julien Leuthold, C. Johan Lissenberg, Brian O'Driscoll, Ozge Karakas, Trevor Falloon, Dina N. Klimentyeva, Peter Ulmer   +6 more
doaj   +1 more source