barents blue
barents blue
Main Type:
Massive stone (Granite)
Sub Type: Gneiss
Evaluation
Economical: Significant economic prospect ,
(Confirmed 16.des.2001 by NGU)
Operations
From - To Activity Comments
1989 - 1989 Detail mapping Company/Institution
:Finnmarksforskning
1989 - 1993 Test mining
1993 Regular production
Production
Prod. method: Open pit mining Production:
Prod. status: Periodic activity
Products: Barents
Blue (tiles) .
Commercial Name Product description : Barents Blue
Classification : Massive blocks Colour
:Bluish
Play of colours : Uniformity :Medium good
Lithology :Migmatite Grain
size :Fine - medium grained (<1mm - 3 mm)
Mineralogy:
Feldspar : Major
mineral (>10%)
Quartz:
Major mineral (>10%)
Biotite : Major
mineral (>10%)
Chlorite:
Subordinate mineral (1-10%)
Potassic feldspar Subordinate mineral (1-10%)
Sericite Accessory mineral (<1%)
Opaque Accessory
mineral (<1%)
Apatite
Accessory mineral (<1%)
Test of
Physical Properties:
Type of test Standard
Test value
Specific gravity DIN 52102
26,3 g/cm3
Bending strength DIN 52112 22,4 N/mm2
Compressive strength DIN
52105 182 N/mm2
Water absorption (weight %) DIN
52103 ,09 %
Wearing coefficient ASTM C241-85 1,73 mm
Deposit rock
Lithology: Weathering colour:
Era:
Archean Period:
Genesis: Metamorphic
formation Form: Lens
Main texture:
Migmatitic
Main grain size: &nb