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Skarn and Granulite


Granulite and Skarn


Definition

Definition
Skarns are formed during regional or contact metamorphism and from a variety of metasomatic processes involving fluids of magmatic, metamorphic, and/or marine origin   
Granulite is fine to medium grained metamorphic rock with a granular of polygonal crystals.   

History
  
  

Origin
USA, Australia   
Central Europe   

Discoverer
Tornebohm   
Unknown   

Etymology
From an old Swedish mining term originally used to describe a type of silicate gangue or waste rock.   
From Latin granulum, a little grain or fine grained   

Class
Metamorphic Rocks   
Metamorphic Rocks   

Sub-Class
Durable Rock, Hard Rock   
Durable Rock, Hard Rock   

Family
  
  

Group
Not Applicable   
Not Applicable   

Other Categories
Fine Grained Rock, Opaque Rock   
Coarse Grained Rock, Medium Grained Rock, Opaque Rock   

Texture

Texture
Earthy, Mud-rich, Rough   
Granoblastic   

Color
Black, Brown, Colourless, Green, Grey, White   
Black, Brown   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
Yes   
Yes   

Stain Resistant
No   
Yes   

Wind Resistant
Yes   
No   

Acid Resistant
Yes   
No   

Appearance
Dull   
Veined or Pebbled   

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Entryways, Interior Decoration   
Bathrooms, Countertops, Decorative Aggregates, Entryways, Flooring, Homes, Hotels, Interior Decoration, Kitchens, Stair Treads   

Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone   
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone   

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
As a Flux in the Production of Steel and Pig Iron, As a Sintering Agent in Steel Industry to process Iron Ore, As Dimension Stone, Gold and Silver production, Manufacture of Magnesium and Dolomite Refractories   
As Dimension Stone, Building houses or walls   

Medical Industry
Not Applicable   
Not Yet Used   

Antiquity Uses
Artifacts, Monuments, Sculpture   
Artifacts, Monuments, Sculpture   

Other Uses
  
  

Commercial Uses
Creating Artwork, Gemstone, Jewelry, Metallurgical Flux, Source of Magnesia (MgO)   
Curling, Gemstone, Laboratory bench tops, Soil Conditioner, Tombstones   

Types

Types
Endoskarns   
Not Available   

Features
Host Rock for Lead, Zinc and Copper Deposits   
Clasts are smooth to touch   

Archaeological Significance
  
  

Monuments
Used   
Used   

Famous Monuments
Data Not Available   
Data Not Available   

Sculpture
Used   
Used   

Famous Sculptures
Data Not Available   
Data Not Available   

Pictographs
Not Used   
Not Used   

Petroglyphs
Not Used   
Not Used   

Figurines
Used   
Used   

Fossils
Absent   
Absent   

Formation

Formation
Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Skarn is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.   
Granulite is a fine-grained granular metamorphic rock in which the main component minerals are feldspars and quartz and forms at high temperature and pressure conditions.   

Composition
  
  

Mineral Content
Calcite, Enstatite, Epidote, Garnet, Magnetite, Pyroxene, Titanite   
Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Quartz   

Compound Content
Au, CaO, Carbon Dioxide, Cu, Fe, MgO   
Aluminium Oxide, CaO, Carbon Dioxide, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Sulfur Dioxide, Titanium Dioxide   

Transformation
  
  

Metamorphism
Yes   
No   

Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism   
Not Applicable   

Weathering
No   
Yes   

Types of Weathering
Not Applicable   
Biological Weathering, Chemical Weathering   

Erosion
No   
Yes   

Types of Erosion
Not Applicable   
Chemical Erosion, Water Erosion, Wind Erosion   

Properties

Physical Properties
  
  

Hardness
6.5   
6-7   

Grain Size
Fine Grained   
Medium to Coarse Grained   

Fracture
Irregular   
Not Available   

Streak
Light to dark brown   
White   

Porosity
Less Porous   
Very Less Porous   

Luster
Waxy and Dull   
Vitreous   

Compressive Strength
Not Available   
175.00 N/mm2   
13

Cleavage
Slaty   
Imperfect   

Toughness
2.4   
Not Available   

Specific Gravity
2.86   
2.8-3.0   

Transparency
Opaque   
Opaque   

Density
2.8-2.9 g/cm3   
3.06-3.33 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
0.92 kJ/Kg K   
10
0.14 kJ/Kg K   
26

Resistance
Heat Resistant   
Heat Resistant, Wear Resistant   

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India, Russia, Saudi Arabia, South Korea, Sri Lanka   
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam   

Africa
South Africa, Western Africa   
Angola, Egypt, Madagascar, Nigeria, South Africa   

Europe
United Kingdom   
Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic, Venezuela   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Canada   
Canada, USA   

South America
Brazil, Colombia, Paraguay   
Not Yet Found   

Deposits in Oceania Continent
  
  

Australia
Central Australia, Western Australia   
Not Yet Found   

Summary >>
<< Reserves

All about Skarn and Granulite Properties

Know all about Skarn and Granulite properties here. All properties of rocks are important as they define the type of rock and its application. Skarn and Granulite belong to Metamorphic Rocks.Texture of Skarn is Earthy, Mud-rich, Rough whereas that of Granulite is Granoblastic. Skarn appears Dull and Granulite appears Veined or Pebbled. The luster of Skarn is waxy and dull while that of Granulite is vitreous. Skarn and Granulite are available in black, brown, colourless, green, grey, white colors. The commercial uses of Skarn are creating artwork, gemstone, jewelry, metallurgical flux, source of magnesia (mgo) and that of Granulite are curling, gemstone, laboratory bench tops, soil conditioner, tombstones.

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