Anouk Borst's Photo Gallery

Spodumene pegmatite in outcrop, Roche Dure pit, Kitotolo district

Manono-Kitotolo mine, Tanganyika, DR Congo

Large white spodumene crystals in outcrop in the southern part of the Manono-Kitotolo pegmatites, Manono, Tanganyika, DRC.
Partially drained (previously flooded) Roche Dure pit from historic tin mining in the background. Photo taken August 2022.

N3E-EXLArfvedsonite [Na][Na₂][Fe²⁺₄Fe³⁺]Si₈O₂₂(OH)₂ , Sodalite Na₄(Si₃Al₃)O₁₂Cl , Eudialyte Na₁₅Ca₆Fe₃Zr₃Si(Si₂₅O₇₃)(O,OH,H₂O)₃(Cl,OH)₂

Kringlerne, Kangerluarsuk Fjord, Ilímaussaq complex, Kujalleq, Greenland

Dimensions: 10 mm x 7.5 mm x 5 mm
Field of View: 12.4 cm
Largest Crystal Size: 2 cm

Euhedral eudialyte crystals (red) in pegmatitic Arfvedsonite (black), on fine-grained matrix of nepheline (grey), sodalite (grey), alkali feldspar (white) and eudialyte (red).
Collected in 2013, Anouk Borst

4LG-RQYGittinsite CaZrSi₂O₇ , Catapleiite Na₂Zr(Si₃O₉)·2H₂O , Eudialyte Na₁₅Ca₆Fe₃Zr₃Si(Si₂₅O₇₃)(O,OH,H₂O)₃(Cl,OH)₂ , Fergusonite-(Y) YNbO₄ , Analcime Na(AlSi₂O₆)·H₂O , Annite KFe²⁺₃(AlSi₃O₁₀)(OH)₂ , Arfvedsonite [Na][Na₂][Fe²⁺₄Fe³⁺]Si₈O₂₂(OH)₂

Kringlerne, Kangerluarsuk Fjord, Ilímaussaq complex, Kujalleq, Greenland

Dimensions: 5 cm x 5 cm x 5 cm
Field of View: 500 μm

Gittinsite partially replacing secondary catapleiite laths in a pseudomorphic aggregate after eudialyte, composed of analcime (dark matrix), catapleiite (intermediate grey in laths), gittinsite (brighter areas in catapleiite laths), fergusonite-(Y) (white crystals in catapleiite) and annite (intergrown with catapleiite).

Borst et al.(2016) Zirconosilicates in the kakortokites of the Ilímaussaq Complex, South Greenland: Implications for fluid evolution and high-field-strength and rare-earth element mineralization in agpaitic systems, Mineralogical Magazine 80, no. 1, pp. 5-30. DOI: 10.1180/minmag.2016.080.046