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File:Thin section scan crossed polarizers Siilinjärvi R636-105.90 edit.jpg

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A sample from which the thin section was made.
English: Scanned image of thin section from Siilinjärvi apatite ore in cross polarised transmitted light. Actual sector size about 37 × 20 mm.

The thin section is only slightly oriented and shearing has barely effected to the rock. The grain size is quite large and carbonate content is high.

Tetraferriphlogopite is the main mineral of the thin section and it forms 50 % of the area. Grains are usually 1-3 mm in diameter and oval in shape. Smaller elongated chips are common between the grains.

Carbonates form one third of the thin section area. Calcite is the dominating carbonate mineral. Carbonates look unaltered in the thin section and they are grown into large mineral aggregates. Dolomite grains are commonly smaller than the calcite grains. The diameter of the grains is 0.2-2 mm.

Apatite is widespread mineral in the thin section, and usually found as big rounded grains. The grains are 0.5-2.5 mm in diameter and form 10 area-% of the thin section.

Amphiboles are found as variable sized sub- to euhedral grains. Biggest crystals are > 3 mm in diameter, and usually they are > 0.5 mm in diameter. However, even tiny crystals are found. Amphiboles form 7 area-% of the thin section.
Čeština: Mikroskopický snímek řezu geologického vzorku apatitické rudy z finského naleziště Siilinjärvi. Vzorek o velikosti 37 × 20 mm byl naskenován polarizačním mikroskopem ve zkříženém světle.
Español: Imagen escaneada de una sección delgada del mineral apatita de Siilinjärvi en luz polarizada cruzada. El tamaño real de esta muestra es aproximadamente 37 × 20 mm.
Magyar: A finnországi Siilinjärvi település karbonátitkomplexum anyagából készült vékonycsiszolat polarizációs mikroszkópi (keresztezett nikolállású) képe
Italiano: Immagine digitalizzata di una sottile sezione del minerale di apatite di Siilinjärvi in luce polarizzata incrociata. L'effettiva dimensione di questo settore è di circa 37 × 20 mm.
한국어: 얇게 자른 실리냬르비 인회석에 교차 편광을 쬐어 정밀 촬영한 모습. 실제 크기는 37 × 20 mm.
Македонски: Пресек на парче апатитска руда од Силинјерви, Финска.
Эрзянь: Siilinjärvi апатитэнь кшнимодань сканось кросс-поляризованной валдосо. Секторонь покшолмазо 37 × 20 mm.
Nederlands: Apatiet-kristallen onder gepolariseerd licht. Werkelijke grootte: ± 37 × 20 mm
Polski: Mikrofotografia cienkiego przekroju rudy bogatej w apatyt pochodzącej z kopalni Siilinjärvi w Finlandii wykonana z pomocą mikroskopu polaryzacyjnego. Rzeczywisty rozmiar próbki to około 37 × 20 mm.
Português: Imagem digitalizada da seção delgada do minério de apatita de Siilinjärvi, Finlândia, em luz polarizada cruzada. O tamanho real desta amostra é de aproximadamente 37 × 20 mm.
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