Results 121 to 130 of about 193 (140)

Alkali-F-Rich Albite Zones in Evolved NYF Pegmatites: The Product of Melt–melt Immiscibility

Canadian Mineralogist, 2018
Axel Müller, John Spratt, Rainer Thomas   +2 more
exaly   +4 more sources

Synthetic Alkali Aluminosilicate-Hydroxide Systems as an Analogue to Optimize Lithium Recovery from LCT Pegmatites

Minerals, Metals and Materials Series
Yves Thibault, Joanne Gamage Mcevoy
exaly   +2 more sources

On the mineralogy and geochemistry of niobium and tantalum in some granite pegmatites and alkali granites of Africa

Bulletin de Minéralogie, 1981
On étudie la minéralisation niobium˗tantale associée aux pegmatites de granite et aux roches granitiques alcalines d'Afrique et on présente une sélection de 124 analyses chimiques de divers minéraux de niobium et de tantale rencontrés au cours de cette étude.
von Knorring, Oleg, Fadipe, Akinola
openaire   +2 more sources

Minerals of the gadolinite-(Y)-hingganite-(Y) series in the alkali granite pegmatites of the Kola Peninsula

Geology of Ore Deposits, 2014
Minerals of the gadolinite-(Y)-hingganite-(Y) series pertaining to the gadolinite-datolite group have been found in the alkali granite pegmatites of the Kola Peninsula. Gadolinite-(Y) is distinguished by its unique natural crystalline state. The unit-cell parameters of this mineral have elevated values as compared with those of gadolinite-(Y) from ...
L. M. Lyalina, E. A. Selivanova, Ye. E. Savchenko, D. R. Zozulya, G. I. Kadyrova   +4 more
openaire   +1 more source

Hydrated CO3-Bearing Analog of Manganoeudialyte from Alkali Pegmatites of the Konder Pluton, Khabarovsk Krai

Geology of Ore Deposits, 2018
The chemical composition, crystal structure, and infrared (IR) spectrum of a hydrated CO3-bearing analog of manganoeudialyte from alkali pegmatites of the Konder pluton (Khabarovsk krai) are studied. The chemical composition of the mineral corresponds to the formula N[Na6.94H2O5.13(Y,REE)0.58.
A. S. Osipov, A. A. Antonov, T. L. Panikorovskii, A. A. Zolotarev   +3 more
openaire   +1 more source

Trace element distributions between the perthite phases of alkali feldspars from pegmatites

Mineralogical Magazine, 1982
AbstractThe distribution of various trace elements between the K-feldspar and albite phases of perthites from several pegmatites was determined by ion microprobe. Ranges in distribution coefficients (wt. % in K-feldspar/wt. % in albite) are: Li, 1.2–780; Mg, 0.2–1.1; P, 0.1–17; Ca, 0.02–1.6; Cs, 32–820; Ba, 24–284; Pb, 1.6–30; Fe, 0.3–0.7; Rb, 59–5505;
openaire   +1 more source

Phosphorus in alkali feldspars as an indicator for prospecting for pegmatite-type rare-metal ore deposits in Altay, NW China

Geochemistry: Exploration, Environment, Analysis, 2013
The phosphorus contents of alkali feldspars of 80 pegmatite veins from the Chinese Altay, NW China, were determined by electron microprobe in this study. The alkali feldspars of the barren pegmatites are poor in phosphorus and range from <0.01–0.05 wt% P 2 O 5 .
Tang Yong, Zhang Hui, Su Guizhen
openaire   +1 more source

The evolution of alkali elements and the division of geochemical process for pegmatite Vein No. 3, Altai, Xinjiang, China

Geochemistry, 1982
According to the evolution of alkali elements (e.g. K, Na, Li) and the relationship among them in the melt-solution of pegmatitic magma, the author divides the pegmatitic process for Vein No. 3 into three main geochemical stages associated with mineralization, i.e., K-Na, Na-Li and K stages.
openaire   +1 more source

MINERAL PARAGENESES AND ANALYSIS OF MINERAL EQUILIBRIA IN RARE ALKALI-METAL METASOMATIC ROCKS OF PEGMATITE FIELDS

International Geology Review, 1988
openaire   +1 more source

Na and K distribution in agpaitic pegmatites☆

Lithos, 2007
Michael A W Marks, Gregor Markl
exaly