Results 21 to 30 of about 10,594 (229)

Experimental constraints on amphibole stability in primitive alkaline and calc-alkaline magmas [PDF]

open access: yes, 2017
Equilibrium crystallization experiments were carried out on two primitive basaltic rocks (APR16: Na2O+K2O=4.40 wt%; CM42: Na2O+K2O=2.59 wt%) with the aim to investigate the amphibole stability in the differentiation processes at deep crustal level, of
Bonechi, Barbara   +4 more
core   +1 more source

A boulder of Ouachitite from Inderskär, Åland Islands, Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1975
The ouachitite is composed of phenocrysts of olivine, diopside, phlogopite, set in a fine-grained matrix with phlogopite, clinopyroxene, ore and calcite. Analyses of the rock and of several minerals are given. It is concluded that the boulder most likely
P. Kresten, N. Edelman
doaj   +1 more source

Cement-rock interaction : infiltration of a high-pH solution into a fractured granite core [PDF]

open access: yes, 2010
Within the framework of the HPF project (Hyperalkaline Plume in Fractured Rock) at the Grimsel Test Site (Switzerland), a small scale core infiltration experiment was performed at the University of Bern.
Mäder, Urs K., Soler, Josep M.
core   +5 more sources

Geology and Geochemistry of the Early Proterozoic Kortejärvi and Laivajoki Carbonatites, Central Fennoscandian Shield, Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1997
This paper provides for the first time extensive petrological, mineralogical and geochemical data on the early Proterozoic Kortejärvi and Laivajoki carbonatites, northern Finland, which form metamorphosed and highly strained bodies 2 and 4 km long within
J. Nykänen, K. Laajoki, J. Karhu
doaj   +1 more source

Mineral chemistry of late Variscan gabbros from central Spain: constraints on crystallisation processes and nature of the parental magmas [PDF]

open access: yes, 2015
© 2016. Universidad Complutense de Madrid. The commercial rights of the printed and online versions of Journal of Iberian Geology are property of the Universidad Complutense de Madrid (UCM) and the Consejo Superior de Investigaciones CientÍficas (CSIC),
Jeffries, T   +3 more
core   +3 more sources

Syntheses of trioctahedral micas in the compositional join phlogopite-sodium phlogopite.

open access: yesJournal of the Mineralogical Society of Japan, 1986
The mica minerals were synthesized in the compositional join phlogopite(Ph)-sodium phlogopite at 1 kbar water pressure and 550°C by using starting oxide mixtures. The resulting phases were phlogopite, phlogopite solid solutions and saponite-like hydrate. Phlogopite was obtained from a Ph100 composition.
Toshihiko MATSUDA, Kitinosuke HENMI
openaire   +2 more sources

Conversion of Fluor-Phlogopite to Hydroxy-Phlogopite in NaOH and LiOH Hydrothermal Solutions

open access: yesJournal of the Ceramic Society of Japan, 1991
Exchange of fluorine for hydroxide ions in synthetic fluor-phlogopite (KMg3AlSi3O10F2) was studied in hydrothermal solutions of various concentrations of NaOH and LiOH. The pressure applied was fixed at 100MPa, temperatures were 300°, 450° and 600°C, and the experimental duration was 7 days.
Taketoshi FUJITA   +2 more
openaire   +2 more sources

ZONATION OF PHLOGOPITE OF CARBONATITE-PEGMATITES OF THE BULDYM DEPOSIT OF THE VISHNEVYE MOUNTAINS (SOUTH URALS) [PDF]

open access: yesМинералогия, 2017
In a plate 19 cm in size from the columnar crystal of phlogopite Buldym deposit in the Southern Urals, we studied the composition of alternating greenish-brown, yellowish-brown and darker brown areas by electron-probe microanalysis.
V.I. Popova   +3 more
doaj  

Petrogenesis of phlogopite-pyroxenite from Southern India: Implications for the link between Proterozoic subduction- to rift-related arc magmatism

open access: yesGeosystems and Geoenvironment, 2022
In this study, we investigate phlogopite-rich pyroxenite from a major terrain boundary, i.e., the interface of Nallamalai Fold Belt and Nellore schist belt, in southern India.
Tushar Meshram   +5 more
doaj   +1 more source

The lithospheric mantle and lower crust-mantle relationships under Scotland: a xenolithic perspective [PDF]

open access: yes, 2011
In the British Isles the majority of volcanic rocks containing upper mantle and lower crustal xenoliths occur in Scotland. Most of the occurrences are of Carboniferous–Permian age.
Arai   +17 more
core   +1 more source

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