Eudialyte Urtite

Urtite is a coarse-grained alkali intrusive rock containing 80 to 90 percent Nepheline; rarely can contain almost exclusively Eudialyte in place of Nepheline. It may also contain as much as 10 percent aegirine or aegirine-augite, as well as admixtures of albite and sphene.

Urtite was first discovered in the Lovozero Massif (Luiavr-Urt) on the Kola Peninsula (hence the name). Urtite is not widely distributed and is frequently found with ijolite and may be associated with intrusive carbonatites. It occurs in the form of small, often sheetlike, bodies among other alkali rocks.

Bibliography



• Ron H. Vernon (2004): A pratical guide to rock microstructure. Cambridge editore
• Eric A.K. (1985): Middlemost Magmas and Magmatic Rocks. Longman, London


Foto
urtite(2).jpg

Colorless Eudialyte crystal and green Aegirine crystals. Urtite from Kola (Russia). PPL image , 2x (Field of view = 7mm)
urtite(3).jpg

Eudialyte crystal and green Aegirine crystals. Urtite from Kola (Russia). XPL image , 2x (Field of view = 7mm)
urtite(4).jpg

Colorless Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). PPL image , 2x (Field of view = 7mm)
urtite(5).jpg

Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). XPL image , 2x (Field of view = 7mm)
urtite(6).jpg

Colorless Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). PPL image , 2x (Field of view = 7mm)
urtite(7).jpg

Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). XPL image , 2x (Field of view = 7mm)
urtite(8).jpg

Colorless Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). PPL image , 2x (Field of view = 7mm)
urtite(9).jpg

Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). XPL image , 2x (Field of view = 7mm)
urtite(10).jpg

Colorless Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). PPL image , 2x (Field of view = 7mm)
urtite(11).jpg

Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). XPL image , 2x (Field of view = 7mm)
urtite(12).jpg

Colorless Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). PPL image , 2x (Field of view = 7mm)
urtite(13).jpg

Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). XPL image , 2x (Field of view = 7mm)
urtite(14).jpg

Colorless Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). PPL image , 2x (Field of view = 7mm)
urtite(15).jpg

Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). XPL image , 2x (Field of view = 7mm)
urtite(16).jpg

Colorless Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). PPL image , 2x (Field of view = 7mm)
urtite(17).jpg

Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). XPL image , 2x (Field of view = 7mm)
urtite(18).jpg

Colorless Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). PPL image , 2x (Field of view = 7mm)
urtite(19).jpg

Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). XPL image , 2x (Field of view = 7mm)
urtite(20).jpg

Colorless Eudialyte crystals, green Aegirine crystals and titanite. Urtite from Kola (Russia). PPL image , 2x (Field of view = 7mm)
urtite(21).jpg

Eudialyte crystals, green Aegirine crystals and titanite. Urtite from Kola (Russia). XPL image , 2x (Field of view = 7mm)
urtite(22).jpg

Aegirine crystals. Urtite from Kola (Russia). PPL image , 10x (Field of view = 2mm)
urtite(25).jpg

Colorless Eudialyte crystals and green Aegirine crystals. Urtite from Kola (Russia). PPL image , 10x (Field of view = 2mm)
urtite(26).jpg

Aegirine crystals. Urtite from Kola (Russia). PPL image , 10x (Field of view = 2mm)
urtite(27).jpg

Aegirine crystals. Urtite from Kola (Russia). XPL image , 10x (Field of view = 2mm)
urtite(28).jpg

Titanite and Aegirine crystals. Urtite from Kola (Russia). PPL image , 10x (Field of view = 2mm)
urtite(29).jpg

Aegirine crystals. Urtite from Kola (Russia). PPL image , 10x (Field of view = 2mm)
urtite(30).jpg

Aegirine crystals. Urtite from Kola (Russia). XPL image , 10x (Field of view = 2mm)
urtite(38).jpg

Colorless Eudialyte crystal and green Aegirine crystals. Urtite from Kola (Russia). PPL image , 10x (Field of view = 2mm)
urtite(39).jpg

Eudialyte crystal and green Aegirine crystals. Urtite from Kola (Russia). XPL image , 10x (Field of view = 2mm)
urtite(44).jpg

Aegirine crystals. Urtite from Kola (Russia). XPL image , 10x (Field of view = 2mm)