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Gabbroic troctolite layer, Horoman peridotite body, Samani-cho, Samani-gun, Hidaka Province, Hokkaido Island, Japan

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Ref.: T. Morishita and S. Arai, Journal of Petrology, 2001, V 42, N 7, pp. 1279-1299.

Mafic layer in peridotite.
Corundum-bearing type II mafic HP gabbroic-troctolitic rock (mantle residue : olivine-plagioclase-clinopyroxene cumulate / P< 1.0 GPa).
Corundum : P > 1.5 GPa (posterior to cumulate formation).





Group 4 - Oxides and Hydroxides
  		• Corundum4.CB.05
    Al
     
    2
    		O
     
    3
  		• Spinel4.BB.05
    MgAl
     
    2
    		O
     
    4
    Group 9 - Silicates
  		• Anorthite9.FA.35
    Ca[Al
     
    2
    		Si
     
    2
    		O
     
    8
    		]
  		• Forsterite9.AC.05
    Mg
     
    2
    		[SiO
     
    4
    		]
    Unclassified Minerals
  		• 'Clinopyroxene Subgroup'-


    5 entries listed. 4 valid minerals.

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