First description by Rosenbusch is dated in 1887.
) are mafic alkaline silicate rocks that belongs to the kimberlite family and are melilite-rich. The type locality (Stornäset or Näset ) from which alnöite was originally described and given the name "melilite basalt" by Törnebohm (1882), shows a black, dense rock with phenocrysts of gold-brown phlogopite and apatite.
• Andersson, M. (2015). 3D Structure and Emplacement of the Alnö Alkaline and Carbonatite Complex, Sweden: Integrated Geophysical and Physical Property Investigations.
• Kresten P (1980): The Alnö complex: tectonics of dyke emplacement. Lithos 13:153–158.
• Brueckner H.K, Rex DC (1980): K-A and Rb-Sr geochronology and Sr isotopic study of the Alnö alkaline complex , northeastern Sweden. Lithos 13:111–119.
Photo
![alnoite(1).jpg](/immagini/vulc/piccole/alnoite(1).jpg)
Phlogopite (brown), altered olivine (yello-green) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 1x (Field of view = 9mm) |
![alnoite(2).jpg](/immagini/vulc/piccole/alnoite(2).jpg)
Phlogopite (brown), altered olivine (yello-green) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 1x (Field of view = 9mm) |
![alnoite(3).jpg](/immagini/vulc/piccole/alnoite(3).jpg)
Phlogopite (brown) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 1x (Field of view = 9mm) |
![alnoite(4).jpg](/immagini/vulc/piccole/alnoite(4).jpg)
Phlogopite and apatite (I order gray) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. XPL image, 1x (Field of view = 9mm) |
![alnoite(5).jpg](/immagini/vulc/piccole/alnoite(5).jpg)
Phlogopite (brown) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 1x (Field of view = 9mm) |
![alnoite(6).jpg](/immagini/vulc/piccole/alnoite(6).jpg)
Phlogopite (brown) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 1x (Field of view = 9mm) |
![alnoite(7).jpg](/immagini/vulc/piccole/alnoite(7).jpg)
Phlogopite (brown) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 1x (Field of view = 9mm) |
![alnoite(8).jpg](/immagini/vulc/piccole/alnoite(8).jpg)
Phlogopite and apatite (I order gray) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. XPL image, 1x (Field of view = 9mm) |
![alnoite(9).jpg](/immagini/vulc/piccole/alnoite(9).jpg)
Phlogopite (brown) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 1x (Field of view = 9mm) |
![alnoite(10).jpg](/immagini/vulc/piccole/alnoite(10).jpg)
Phlogopite and apatite (I order gray) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. XPL image, 1x (Field of view = 9mm) |
![alnoite(11).jpg](/immagini/vulc/piccole/alnoite(11).jpg)
Phlogopite (brown), altered olivine (yello-green) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 1x (Field of view = 9mm) |
![alnoite(12).jpg](/immagini/vulc/piccole/alnoite(12).jpg)
Phlogopite (brown), altered olivine (yello-green) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 1x (Field of view = 9mm) |
![alnoite(13).jpg](/immagini/vulc/piccole/alnoite(13).jpg)
Phlogopite, altered olivine and apatite (I order gray) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. XPL image, 1x (Field of view = 9mm) |
![alnoite(14).jpg](/immagini/vulc/piccole/alnoite(14).jpg)
Phlogopite (brown), altered olivine (yello-green) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 1x (Field of view = 9mm) |
![alnoite(15).jpg](/immagini/vulc/piccole/alnoite(15).jpg)
Phlogopite (brown) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 1x (Field of view = 9mm) |
![alnoite(16).jpg](/immagini/vulc/piccole/alnoite(16).jpg)
Phlogopite (brown) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 1x (Field of view = 9mm) |
![alnoite(18).jpg](/immagini/vulc/piccole/alnoite(18).jpg)
Phlogopite (brown), altered olivine (yello-green) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 1x (Field of view = 9mm) |
![alnoite(20).jpg](/immagini/vulc/piccole/alnoite(20).jpg)
Phlogopite (brown), altered olivine (yello-green) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 1x (Field of view = 9mm) |
![alnoite(21).jpg](/immagini/vulc/piccole/alnoite(21).jpg)
Phlogopite (brown) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 2x (Field of view = 7mm) |
![alnoite(22).jpg](/immagini/vulc/piccole/alnoite(22).jpg)
Phlogopite (brown), altered olivine (yello-green) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 2x (Field of view = 7mm) |
![alnoite(23).jpg](/immagini/vulc/piccole/alnoite(23).jpg)
Phlogopite (brown), altered olivine (yello-green) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 2x (Field of view = 7mm) |
![alnoite(24).jpg](/immagini/vulc/piccole/alnoite(24).jpg)
Phlogopite (brown) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 2x (Field of view = 7mm) |
![alnoite(25).jpg](/immagini/vulc/piccole/alnoite(25).jpg)
Phlogopite (brown), altered olivine (yello-green) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 2x (Field of view = 7mm) |
![alnoite(26).jpg](/immagini/vulc/piccole/alnoite(26).jpg)
Phlogopite (brown) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 2x (Field of view = 7mm) |
![alnoite(29).jpg](/immagini/vulc/piccole/alnoite(29).jpg)
Phlogopite (brown) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 2x (Field of view = 7mm) |
![alnoite(30).jpg](/immagini/vulc/piccole/alnoite(30).jpg)
Phlogopite and apatite (I order gray) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 2x (Field of view = 7mm) |
![alnoite(31).jpg](/immagini/vulc/piccole/alnoite(31).jpg)
Phlogopite (brown) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 2x (Field of view = 7mm) |
![alnoite(35).jpg](/immagini/vulc/piccole/alnoite(35).jpg)
Phlogopite (brown) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 2x (Field of view = 7mm) |
![alnoite(36).jpg](/immagini/vulc/piccole/alnoite(36).jpg)
Phlogopite (brown) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 2x (Field of view = 7mm) |
![alnoite(37).jpg](/immagini/vulc/piccole/alnoite(37).jpg)
Phlogopite (brown) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 2x (Field of view = 7mm) |
![alnoite(41).jpg](/immagini/vulc/piccole/alnoite(41).jpg)
Phlogopite (brown), altered olivine (yello-green) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 10x (Field of view = 2mm) |
![alnoite(42).jpg](/immagini/vulc/piccole/alnoite(42).jpg)
Phlogopite, altered olivine and apatite (I order gray) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. XPL image, 10x (Field of view = 2mm) |
![alnoite(43).jpg](/immagini/vulc/piccole/alnoite(43).jpg)
Altered olivine (yello-green) crystal in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 10x (Field of view = 2mm) |
![alnoite(50).jpg](/immagini/vulc/piccole/alnoite(50).jpg)
Phlogopite (brown), altered olivine (yello-green) and apatite (colorles) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 10x (Field of view = 2mm) |
![alnoite(51).jpg](/immagini/vulc/piccole/alnoite(51).jpg)
Phlogopite (brown), calcite (after melilite) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 10x (Field of view = 2mm) |
![alnoite(52).jpg](/immagini/vulc/piccole/alnoite(52).jpg)
Phlogopite, calcite (after melilite) crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. XPL image, 10x (Field of view = 2mm) |
![alnoite(53).jpg](/immagini/vulc/piccole/alnoite(53).jpg)
Phlogopite (brown), calcite (after melilite) and apatite crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 10x (Field of view = 2mm) |
![alnoite(54).jpg](/immagini/vulc/piccole/alnoite(54).jpg)
Phlogopite, calcite (after melilite) and apatite crystals in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 10x (Field of view = 2mm) |
![alnoite(55).jpg](/immagini/vulc/piccole/alnoite(55).jpg)
Phlogopite (brown) in a fine-grained groundmass. Alnöite, Alnö complex, Sweden. PPL image, 10x (Field of view = 2mm) |