Results 11 to 20 of about 305 (130)

MORPHOLOGICAL NOTES ABOUT AMAZONITE [PDF]

open access: yesМинералогия, 2018
Morphological features of amazonite cause some onthogenic models of K-feldspars. The crystals of amazonite are zonal and sectorial. «Microcline lattice» of stresses in K-feldspar is formed after its growth during polymorphic transformation of monoclinic ...
V.A. Popov
doaj   +3 more sources

The evolution of the Čanište epidote-bearing pegmatite, Republic of Macedonia: evidence from mineralogical and geochemical features [PDF]

open access: yesGeologia Croatica, 2012
The epidote-bearing Čanište pegmatite and adjacent Upper Carboniferous granodiorites cut Precambrian gneises, at the western slopes of the Selečka Mts., the Eastern Pelagonian zone, FYRO Macedonia.
Sabina Strmić Palinkaš   +6 more
doaj   +4 more sources

Mineralogy and petrology of the amazonite pegmatite at Bakstevalåsen, øvre Eiker [PDF]

open access: yes, 2013
An exotic pegmatite classified as a rare-element gadolinite type amazonite pegmatite is situated in Paleozoic sedimentary rocks, and associated with the peralkaline ekerite granites in the Permian Oslo Region. The amazonite pegmatite is approximately 16 meters long and consists of a coarse-grained, subhedral, green microcline feldspar (amazonite ...
Sunde, Øyvind
openaire   +3 more sources

MICAS FROM PEGMATITES OF THE ILMENY STATE RESERVE [PDF]

open access: yesМинералогия, 2016
Most comprehensive review of micas from pegmatites of the Ilmeny State Reserve is presented. Correlation between the composition of micas and the type of pegmatite is shown. The data on evolution of micas from amazonite pegmatites are provided.
E.V. Belogub   +2 more
doaj   +2 more sources

CHARACTERISTICS OF THE UNIQUE Y-HREE-F-RICH PEGMATITE SYSTEM REVEALED BY ZIRCON GEOCHEMISTRY: A CASE STUDY FROM MT. PLOSKAYA AMAZONITE DEPOSIT, KOLA PENINSULA [PDF]

open access: yesМинералогия
An amazonite-quartz-albite pegmatite body of the Mt. Ploskaya intrudes a metavolcanic complex of the Keivy Terrane (Kola Peninsula) and is unique in its diversity and an assemblage of ore and accessory Y-Yb-Ta-Nb-Be-Pb-F mineralization.
D.R. Zozulya   +3 more
doaj   +3 more sources

40Ar-39Ar Dating of Muscovite from the Zhaojinggou Nb-Ta Polymetallic Deposit in Wuchuan County of Inner Mongolia and Its Geological Implications

open access: yesYankuang ceshi, 2017
The Zhaojinggou Nb-Ta polymetallic deposit in Inner Mongolia is a newly discovered large rare metal ore deposit. The reserve of Nb-Ta oxides is more than 8200 tons.
GAO Yun   +5 more
doaj   +1 more source

Mineralogical characteristic of amazonite from Čanište- Republic of Macedonia [PDF]

open access: yes, 2014
Mineralogy of amazonite from Čanište is presented in this paper including physical properties and chemical composition. Several samples of amazonite were analysed by scanning electron microscope (SEM). SEM is especially useful because it gives elemental,
Sijakova-Ivanova, Tena, Mircovski, Vojo
core   +2 more sources

Mineralogical–Geochemical Characteristics of Amazonite from Five Localities in Northwest China

open access: yesYankuang ceshi
Amazonite was a significant gemstone in ancient China, and determining its provenance is crucial for understanding early interregional resource use and cultural exchange patterns.
Yifei PENG   +5 more
doaj   +1 more source

Amazonite (variety of microcline) with amazonite: Colorado, Park County, Lake George district

open access: yes, 2022
The mineral specimen comes from the Lake George pegmatite district, Park County, Colorado. This locale is known for its amazonite specimens."3.5 x 3.1 x 2.1 in."The following information applies to the digital image:The mineral specimen comes from the ...

core  

INTERRELATIONS BETWEEN MINERAL BODIES IN FENITE HALO OF THE WESTERN CONTACT OF THE ILMENOGORSKY MIASKITE COMPLEX [PDF]

open access: yesМинералогия, 2017
The northwestern contact of the Ilmenogorsky miaskite complex exhibits a succession of rocks from early banded meso- and melanocratic syenites to granosyenites and granites and further complex series of leucocratic syenites, carbonatites, syenitic and ...
V.A. Popov, V.A. Muftakhov
doaj  

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