Behoite and mimetite from the Saharjok alkaline intrusion, Kola Peninsula

2010 ◽  
Vol 52 (7) ◽  
pp. 641-645 ◽  
Author(s):  
L. M. Lyalina ◽  
Ye. E. Savchenko ◽  
E. A. Selivanova ◽  
D. R. Zozulya
Keyword(s):  
Kola Peninsula ◽  
Alkaline Intrusion

scholarly journals On the mineralogy and paragenesis of tugtupite Na8Al2Be2Si8O24(Cl,S)2 from the Ilímaussaq alkaline intrusion, South Greenland

1971 ◽  
Vol 95 ◽  
pp. 3-57
Author(s):  
H Sørensen ◽  
M Danø ◽  
O.V Petersen ◽  
A.S Povarennykh ◽  
A.N Platonov ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Kola Peninsula ◽  
Alkaline Intrusion ◽  
Hydrothermal Veins

Tugtupite, Na8Al2Be2Si8O24(Cl,S) 2, is colourless to red, tetragonal, pseudocubic and forms triplet twins on {101}. c: a = 1.0269 ± 0.0003, d = 2.33 g/cm3, nε = 1.499 ± 0.001, nα = 1.495 ± 0.001. a0 = 8.637-8.643, c0 = 8.867 - 8.870, V0 = 662 Å3. The description of the crystal structure is taken from Danø (1966). The mineral occurs in hydrothermal veins in the Ilímaussaq alkaline intrusion, South Greenland, and in the Lovozero alkaline intrusion, Kola Peninsula (beryllosodalite). A number of occurrences of tugtupite in Ilimaussaq are described. Tugtupite is most commonly associated with albite, analcime and Li-mica and is generally secondary after chkalovite. The paragenesis and origin of the mineral and a number of associated beryllium silicates are discussed.

scholarly journals Tourism, Scientific, and Didactic Potential of the Ultrabasic-Alkaline Intrusion in Afrikanda with Perovskite Mineral (Kola Peninsula, N Russia) and of the Related Built Heritage

Heritage ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 3892-3907
Author(s):  
Miłosz Huber ◽  
Olga Iakovleva
Keyword(s):  
Kola Peninsula ◽  
Present Article ◽  
Good Condition ◽  
Conservation Area ◽  
Built Heritage ◽  
Hiking Trails ◽  
Alkaline Intrusion ◽  
Historical Sites ◽  
Railroad Station ◽  
Protected Zone

The present article is an example of research on the tourism, scientific, and teaching potential of the ultrabasic-alkaline intrusion with perovskite minerals in Afrikanda (Kola Peninsula, North Russia) and the possibility of its development as part of a local geopark site. A proposal to create a protected zone in this site, to expose sites of geological, natural, historical, and tourist interest is presented. Didactic routes and locations of geo-point visitors are proposed. Currently, there are numerous quarries and other mining objects of high historical, technical, and geological value. In the vicinity, there is a trough lake and post-glacial formations that can supplement knowledge about this region and add interest to would-be visitors. The remains of a historical camp for workers and miners are also visible in the intrusion area. In the vicinity of Afrikanda village, there is an international railroad line to Murmansk and St. Petersburg with a working railroad station. The place has high historical and geological potential for tourists and very rare and interesting mineralization. The last is a key value. The location is associated with 30 alkaline intrusions in NE Fennoskandia. There are opportunities to create a museum with a park where, with relatively little funding (most of the existing infrastructure buildings are in good condition), the intrusions can be shown to tourists. We proposed a conservation area with exposures, quarries, mine infrastructure, and historical sites, along with the location of geosites, hiking trails, and a geo-point for visitors. These sites are prospective for the economic revival of Afrikanda village and can protect the unique exposures.

scholarly journals Eudidymite and epididymite from the Ilímaussaq alkaline intrusion, South Greenland

1966 ◽  
Vol 63 ◽  
pp. 1-21
Author(s):  
E.I Semenov ◽  
H Sørensen
Keyword(s):  
Optical Properties ◽  
Kola Peninsula ◽  
Axial Plane ◽  
Alkali Granite ◽  
Chemical Analyses ◽  
X Ray ◽  
Fine Grained ◽  
Alkaline Intrusion ◽  
Mode Of Occurrence

Eudidymite has been discovered as lamellar or spherulitic aggregates in veins of albitite in alkali granite and in poikilitic nepheline-sodalite syenite (naujaite) in the Ilímaussaq alkaline intrusion, South Greenland. In the veins in granite it is associated with microcline, quartz, albite, arfvedsonite, ægirine, polylithionite, narsarsukite, monazite and elpidite. In naujaite eudidymite is associated with albite, microcline, fluorite, analcime, tugtupite, epididymite, genthelvite, neptunite, schizolite, lithium mica, ægirine, katapleiite, etc. Epididymite occurs as microcrystalline or fine-grained masses associated with analcime, albite, tugtupite, eudidymite leucophane, schizolite, etc. in veins of albitite in naujaite. The optical properties of the two minerals are: eudidymite: nα = 1.545, nγ = 1.549, 2 Vγ = 25°; epididymite: nα = 1.540, nγ = 1.544, 2 Vα = 16-26° with a pronounced crossed axial plane dispersion. Both minerals are polysynthetically twinned. Chemical analyses of the two minerals are recorded. The X-ray powder diagrams are identical with those of epididymite and eudidymite from Lovozero. Eudidymite and epididymite were formed during late albitization of naujaite. Their mode of occurrence recalls that of these two minerals at Lovozero, the Kola peninsula.

About the composition of meliphanite from nepheline syenite pegmatite of the Sakharjok massif (Kola Peninsula)

2018 ◽  
Vol 147 (2) ◽  
pp. 79-91 ◽  
Author(s):  
Lyalina L. М. ◽  
◽  
Kadyrova G. I. ◽  
Selivanova E. A. ◽  
Zolotarev A. A. jr. ◽  
...  
Keyword(s):  
Kola Peninsula ◽  
Nepheline Syenite

Natrophosphate from the Ilímaussaq alkaline complex, South Greenland

2001 ◽  
pp. 139-141
Author(s):  
Ole V. Petersen ◽  
Alexander P. Khomyakov ◽  
Henning Sørensen
Keyword(s):  
Refractive Index ◽  
Kola Peninsula ◽  
Unit Cell Parameter ◽  
Cell Parameter ◽  
Water Soluble ◽  
Type Locality ◽  
Drill Core ◽  
Alkaline Complex ◽  
First Time ◽  
Alkaline Complexes

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Petersen, O. V., Khomyakov, A. P., & Henning. (2001). Natrophosphate from the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin, 190, 139-141. https://doi.org/10.34194/ggub.v190.5184 _______________ The rare mineral natrophosphate has been identified for the first time in the Ilímaussaq alkaline complex in a drill core from the Kvanefjeld area. It occurs sparsely in zoned veinlets with cores of natrophosphate and borders of fibrous trona. The natrophosphate is more or less smoky, transparent and unaltered. The refractive index n = 1.448 ± 0.005 is low compared to that given for the material from the type locality, Khibina alkaline complex, Kola Peninsula; the unit cell parameter a = 27.76 ± 0.05 Å is in excellent agreement with that given for the material from the type locality. The veins occur in hyper-agpaitic naujakasite lujavrite; villiaumite is an associated mineral. Only a few water-soluble minerals have so far been found in the Ilímaussaq alkaline complex compared to the wealth of such minerals in the Khibina and Lovozero alkaline complexes. This is possibly at least partly due to lack of necessary precautions during sampling.

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