Jump to content

File:Fenite (Late Devonian; Selsurt Mountain, Kola Peninsula, Russia) 1.jpg

Page contents not supported in other languages.
This is a file from the Wikimedia Commons
From Wikipedia, the free encyclopedia

Original file (2,445 × 2,928 pixels, file size: 5.42 MB, MIME type: image/jpeg)

Summary

Description
English: Fenite from the Devonian of Russia.

Fenite is a rare variety of metasomatite, a metamorphic rock formed solely by chemical alteration of previously existing rocks. The type locality for this lithology is the Ediacaran to Cambrian-aged Fen Carbonatite Complex in Norway. Fenites occur next to carbonatite complexes and form by CO2 chemical alteration.

This fenite sample is from northwestern Russia's Lovozero Alkaline Massif (Late Devonian, ~360 to 370 Ma). The dark gray matrix is the fenite. Three minerals occur in the sample as large crystals embedded in fenite: 1) murmanite (= buff-colored blocky crystal at top), a rare hydrous sodium titanium silicate (Na2Ti2(Si2O7)O2·2H2O); 2) aegirine (= long, slender black sticks), a type of pyroxene, sodium iron silicate (NaFeSi2O6); and 3) eudialyte (= reddish-purplish colored masses), a rare complex silicate mineral whose formula varies from reference to reference (for example, Na4(Ca,Ce)2(Fe,Mn,Y)ZrSi8O22(OH,Cl)2).

Locality: Selsurt Mountain (= Flora Mountain), Lovozero Massif, Kola Peninsula, far-northwestern Russia


See more info. at:

Murmanite: www.mindat.org/min-2813.html

Aegirine: www.mindat.org/min-31.html

Eudialyte: www.mindat.org/min-1420.html

Lovozero Alkaline Massif: www.mindat.org/loc-2697.html and wiki.riteme.site/wiki/Lovozero_Massif and wiki.riteme.site/wiki/Kola_Alkaline_Province and

Mikhailova et al. (2019) - Petrogenesis of the Eudialyte Complex of the Lovozero Alkaline Massif (Kola Peninsula, Russia). Minerals 2019(9)(10)(581). 31 pp. (www.mdpi.com/2075-163X/9/10/581)
Date
Source https://www.flickr.com/photos/47445767@N05/50675018122/
Author James St. John

Licensing

w:en:Creative Commons
attribution
This file is licensed under the Creative Commons Attribution 2.0 Generic license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/50675018122. It was reviewed on 18 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

18 December 2020

Captions

Add a one-line explanation of what this file represents

Items portrayed in this file

depicts

2 December 2020

0.01666666666666666666 second

11.614 millimetre

image/jpeg

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current15:22, 18 December 2020Thumbnail for version as of 15:22, 18 December 20202,445 × 2,928 (5.42 MB)Ser Amantio di NicolaoUploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50675018122/ with UploadWizard

The following 2 pages use this file:

Global file usage

The following other wikis use this file:

Metadata