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
Cataclasite is a type of cataclastic rock that is formed by fracturing and comminution during faulting. It is normally cohesive and non-foliated, consisting of angular clasts in a finer-grained matrix
Origin
USA, Australia
Swiss Alps, Europe
Discoverer
Tornebohm
Michael Tellinger
Etymology
From an old Swedish mining term originally used to describe a type of silicate gangue or waste rock.
From the Italian word cataclasi
Class
Metamorphic Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock
Texture
Earthy, Mud-rich, Rough
Clastic
Color
Black, Brown, Green, Grey, White
Brown, Green, White, Yellow
Durability
Durable
Durable
Appearance
Dull
Dull and Banded
Interior Uses
Decorative Aggregates, Entryways, Interior Decoration
Decorative Aggregates, Homes
Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
As Building Stone, As Facing Stone, Paving Stone
Other Architectural Uses
Curbing
Curbing
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, Cement Manufacture, Construction Aggregate, for Road Aggregate
Antiquity Uses
Artifacts, Monuments, Sculpture
Artifacts
Commercial Uses
Creating Artwork, Gemstone, Jewelry, Metallurgical Flux, Source of Magnesia (MgO)
Commemorative Tablets, Creating Artwork
Types
Endoskarns
Protocataclasite, Mesocataclasite, Ultracataclasite and Foliated cataclasite
Features
Host Rock for Lead, Zinc and Copper Deposits
Easily splits into thin plates, Is one of the oldest rock
Archaeological Significance
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.
Cataclasiste rocks mainly form by pressure deep under the Earth's surface, from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.
Mineral Content
Calcite, Enstatite, Epidote, Garnet, Magnetite, Pyroxene, Titanite
Albite, Apatite, Augite, Biotite, Calcite, Enstatite, Epidote, Feldspar, Micas, Muscovite or Illite, Pyroxene, Quartz
Compound Content
Au, CaO, Carbon Dioxide, Cu, Fe, MgO
Silicon Dioxide
Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
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Types of Weathering
-
Mechanical Weathering
Types of Erosion
-
Coastal Erosion, Wind Erosion
Grain Size
Fine Grained
Fine Grained
Streak
Light to dark brown
Black
Porosity
Less Porous
Less Porous
Luster
Waxy and Dull
Vitreous
Specific Gravity
2.86
2.1
Transparency
Opaque
Translucent to Opaque
Density
2.8-2.9 g/cm3
2.9-3.1 g/cm3
Resistance
Heat Resistant
Heat Resistant, Impact Resistant, Pressure Resistant
Deposits in Eastern Continents
Asia
China, India, Russia, Saudi Arabia, South Korea, Sri Lanka
China, India, Russia, Saudi Arabia, South Korea
Africa
South Africa, Western Africa
Egypt, Ethiopia, Kenya, Madagascar, Morocco, South Africa
Europe
United Kingdom
England, Finland, France, Spain, United Kingdom
Deposits in Western Continents
North America
Canada
Canada, USA
South America
Brazil, Colombia, Paraguay
Argentina, Colombia
Deposits in Oceania Continent
Australia
Central Australia, Western Australia
Central Australia, Western Australia
All about Skarn and Cataclasite Properties
Know all about Skarn and Cataclasite properties here. All properties of rocks are important as they define the type of rock and its application. Skarn and Cataclasite belong to Metamorphic Rocks.Texture of Skarn is Earthy, Mud-rich, Rough whereas that of Cataclasite is Clastic. Skarn appears Dull and Cataclasite appears Dull and Banded. The luster of Skarn is waxy and dull while that of Cataclasite is vitreous. Skarn is available in black, brown, green, grey, white colors whereas Cataclasite is available in brown, green, white, yellow colors. The commercial uses of Skarn are creating artwork, gemstone, jewelry, metallurgical flux, source of magnesia (mgo) and that of Cataclasite are commemorative tablets, creating artwork.