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Laouni West intrusion, Laouni, Ahaggar Mts (Hoggar Mts), Tamanghasset Province, Algeria

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The Laouni West intrusion forms one of four small intrusive massifs regrouped into the "Pan-African Laouni igneous Complex". The age of the intrusions ranges between 600 and 540 Ma. The ortho-ultrabasic cumulates are cyclic and show a succession of olivine-, chromite-, bronzite- and plagioclase-rich cumulates.

Reference:
Lorand, J.-P. et al. Occurrence and petrological significance of Loveringite in the Western Laouni Layered Complex, Southern Hoggar, Algeria. Can Miner. (1987) 25, 683-693




Group 4 - Oxides and Hydroxides
  		• Chromite4.BB.05
    FeCr
     
    2
    		O
     
    4
  		• Hercynite
    var: Picotite    		4.BB.05
    (Fe,Mg)(Al,Cr)
     
    2
    		O
     
    4
  		• Ilmenite4.CB.05
    Fe
    2+
     
    		TiO
     
    3
  		• Loveringite4.CC.40
    (Ca,Ce)(Ti,Fe,Cr,Mg)
     
    21
    		O
     
    38
  		• Pseudobrookite4.CB.15
    Fe
     
    2
    		TiO
     
    5
  		• Rutile4.DB.05
    TiO
     
    2
  		• Zirconolite4.DH.30
    CaZrTi
     
    2
    		O
     
    7
    Group 9 - Silicates
  		• Anorthite
    var: Labradorite    		9.FA.35
    (Ca,Na)[Al(Al,Si)Si
     
    2
    		O
     
    8
    		]
  		• Aspidolite9.EC.20
    NaMg
     
    3
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
  		• Enstatite9.DA.05
    Mg
     
    2
    		[SiO
     
    3
    		]
     
    2
  		• Forsterite9.AC.05
    Mg
     
    2
    		[SiO
     
    4
    		]
  		• Kaersutite9.DE.15
    [Na][Ca
     
    2
    		][Mg
     
    4
    		Ti][O|OH|Al
     
    2
    		Si
     
    6
    		O
     
    22
    		]
  		• Pargasite9.DE.15
    [Na][Ca
     
    2
    		][Mg
     
    4
    		Al][(OH)
     
    2
    		|Al
     
    2
    		Si
     
    6
    		O
     
    22
    		]
  		• Phlogopite9.EC.20
    KMg
     
    3
    		[(OH,F)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
      var: Chromian Phlogopite9.EC.20
    KMg
     
    3
    		[(OH,F)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    Unclassified Minerals
  		• 'Albite-Anorthite Series'-
  		• 'Apatite'-
  		• 'Clinopyroxene Subgroup'-
  		• 'Geikielite-Ilmenite Series'-
  		• 'Kennedyite'-
    MgFeTi
     
    3
    		O
     
    10
  		• 'Olivine'-
    (Mg,Fe
    2+
     
    		)
     
    2
    		[SiO
     
    4
    		]
  		• 'Orthopyroxene Subgroup'-


    22 entries listed. 15 valid minerals.

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