Results 201 to 210 of about 43,981 (268)

Newtonian flow of plagioclase/clinopyroxene aggregates

, 2004
Dimanov, A., Rybacki, E., Wirth, R., Dresen, G.   +3 more
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Kinetic partitioning of major and trace cations between clinopyroxene and phonotephritic melt under convective stirring conditions: New insights into clinopyroxene sector zoning and concentric zoning

Chemical Geology, 2021
Within subvolcanic plumbing systems, along volcanic conduits and post-eruptive emplacement, mineral textures and compositions are governed by complex kinetic (undercooling) and dynamic (convective) processes that deviate from theoretical models and ...
F. Fiore, S. Mollo, A. Vona, Alice MacDonald, T. Ubide, M. Nazzari, C. Romano, P. Scarlato   +7 more
semanticscholar   +1 more source

The role of undercooling during clinopyroxene growth in trachybasaltic magmas: Insights on magma decompression and cooling at Mt. Etna volcano

, 2020
Isothermal and undercooling experiments were conducted on one of the most primitive trachybasalts from Mt. Etna volcano in order to examine the crystallization mechanisms controlling the textural and compositional variability of clinopyroxene ...
M. Masotta, A. Pontesilli, S. Mollo, P. Armienti, T. Ubide, M. Nazzari, P. Scarlato   +6 more
semanticscholar   +1 more source

Sector-zoned clinopyroxene as a recorder of magma history, eruption triggers, and ascent rates

Geochimica et Cosmochimica Acta, 2019
Sector-zoned clinopyroxene is common in igneous rocks, but has been overlooked in the study of magmatic processes. Whilst concentric zoning is commonly used as a record of physicochemical changes in the melt feeding crystal growth, clinopyroxene is also ...
T. Ubide, S. Mollo, Jian-xin Zhao, M. Nazzari, P. Scarlato   +4 more
semanticscholar   +1 more source

Integrated major and trace element study of clinopyroxene in basic, intermediate and acidic volcanic rocks from the middle Okinawa Trough: Insights into petrogenesis and the influence of subduction component

, 2020
Magmatism is very common in the Okinawa Trough. However, the influence of magmatic processes, including fractional crystallization and magma mixing, on the petrogenesis of volcanic rocks is poorly understood.
Xiaohui Li, Z. Zeng, Hui-Feng Yang, Yuting Zhao, Xuebo Yin, Xiaoyuan Wang, Shuai Chen, Haiyan Qi, K. Guo   +8 more
semanticscholar   +1 more source

Textures and compositions of clinopyroxene in an Fe skarn with implications for ore-fluid evolution and mineral-fluid REE partitioning

, 2020
Clinopyroxene is a common phase in a variety of hydrothermal ore deposits, notably in skarn deposits where it typically occurs as a major constituent. It commonly displays variations in texture and composition due to changing physicochemical conditions ...
G. Wen, Jian-wei Li, A. Hofstra, A. Koenig, Bingquan Cui   +4 more
semanticscholar   +1 more source

Compressional behaviour of CaNiSi2O6 clinopyroxene: bulk modulus systematic and cation type in clinopyroxenes

Physics and Chemistry of Minerals, 2005
A single-crystal of composition CaNiSi2O6 (space group C2/c) was investigated at high pressure up to about 7.8  GPa by X-ray diffraction. The unit-cell parameters were measured at 18 different pressures. The P-V data were fitted by a third-order Birch-Murnaghan equation of state V0=435.21(1)  A3, K 0=117.6(3) GPa and K′=6.4(1).
NESTOLA F., BOFFA BALLARAN T., TRIBAUDINO, Mario, OHASHI H.   +3 more
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Properties of clinopyroxene LiFeGe2O6

Physics of the Solid State, 2010
The polycrystalline compound LiFeGe2O6 has been synthesized by the solid-phase reaction. The X-ray diffraction, Mossbauer, calorimetric, and magnetic investigations have been carried out. The Mossbauer spectrum at 300 K represents a single quadrupole doublet.
T. V. Drokina, G. A. Petrakovskiĭ, O. A. Bayukov, A. F. Bovina, R. Shimchak, D. A. Velikanov, A. V. Kartashev, A. L. Volkova, D. A. Ivanov, G. N. Stepanov   +9 more
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Raman spectroscopy of CaCoSi2O6–Co2Si2O6 clinopyroxenes

Physics and Chemistry of Minerals, 2014
Raman spectra were collected on a set of synthetic clinopyroxenes along the series CaCoSi2O6–Co2Si2O6. Changes in peak position and peak width show: (1) evidence of a phase transition from C2/c to P21/c, at Ca0.4Co1.6Si2O6, in agreement with previous X-ray observations; (2) peak broadening for intermediate compositions, with sharper peaks close to the ...
MANTOVANI, Luciana, TRIBAUDINO, Mario, ALIATIS, Irene, LAMBRUSCHI, Erica, LOTTICI, Pier Paolo, BERSANI, Danilo   +5 more
openaire   +2 more sources

An integrated P-T-H2O-lattice strain model to quantify the role of clinopyroxene fractionation on REE+Y and HFSE patterns of mafic alkaline magmas: Application to eruptions at Mt. Etna

Earth-Science Reviews, 2018
A correct description and quantification of the geochemical behaviour of REE+Y (rare earth elements and Y) and HFSE (high field strength elements) is a key requirement for modeling petrological and volcanological aspects of magma dynamics.
S. Mollo, J. Blundy, P. Scarlato, S. D. De Cristofaro, Vanni Tecchiato, F. Di Stefano, F. Vetere, F. Holtz, O. Bachmann   +8 more
semanticscholar   +1 more source