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  Sample n° 5819
          Minerals found in the sample
          
            
	       
                
           
 
        
        
      
         | Mineral | Formula | Category | Subcategory | Importance | 
|---|---|---|---|---|
| MICROCLINE | K(AlSi3O8) | tektosilicates | feldspar | major | 
           Description
            
       
           
    
               Description:
               mass of pink crystals with prominent cleavage
            
                         
                Information:
                geochronology - Cahen, L., Delhal, J., Ledent, D. & Reinharz, M., 1963. L'âge des migmatites de Boma et de l'orogenèse ouest-congolienne. Indications préliminaires sur l'âge des formations Mayumbiennes et antérieures. Annales de la Société Géologique de Belgique 86, 229-269.
                        
     
      Origin
    
   
  
    - Country: Congo (RDC)
- Region: Bas-Congo
- Locality: Boma, Carrière des Voies Navigables
        Specification
    
    
      
    
 
    
  - 
          Donors: BecquaertDonation year: 1955
- 
          Sampling year:Registration date:
- 
          Quantity: 1Size: 2
- 
          Dimension code 1>2>3: 3Quality code 1>2>3: 1
- 
          Holotype: noParatype: noRadioactive: no
- 
          Thin section: noChemical analysis: noX-Ray spectra: no