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Trachyandesite
Trachyandesite

Skarn
Skarn



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Trachyandesite
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Skarn

Trachyandesite and Skarn

1 Definition
1.1 Definition
Trachyandesite is an extrusive igneous rock.
Skarns are formed during regional or contact metamorphism and from a variety of metasomatic processes involving fluids of magmatic, metamorphic, and/or marine origin
1.2 History
1.2.1 Origin
Indonesia
USA, Australia
1.2.2 Discoverer
Unknown
Tornebohm
1.3 Etymology
From French trachyandésite, trachy + andésite andesite, a lava intermediate in composition between trachyte and andesite
From an old Swedish mining term originally used to describe a type of silicate gangue or waste rock.
1.4 Class
Igneous Rocks
Metamorphic Rocks
1.4.1 Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
1.5 Family
1.5.1 Group
Volcanic
Not Applicable
1.6 Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock
2 Texture
2.1 Texture
Glassy, Massive, Porphyritic, Scoriaceous, Vesicular
Earthy, Mud-rich, Rough
2.2 Color
Black, Brown, Light to Dark Grey
Black, Brown, Colourless, Green, Grey, White
2.3 Maintenance
Less
Less
2.4 Durability
Durable
Durable
2.4.1 Water Resistant
2.4.2 Scratch Resistant
2.4.3 Stain Resistant
2.4.4 Wind Resistant
2.4.5 Acid Resistant
2.5 Appearance
Dull and Soft
Dull
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Countertops, Decorative Aggregates, Homes, Interior Decoration
Decorative Aggregates, Entryways, Interior Decoration
3.1.2 Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
3.1.3 Other Architectural Uses
Curbing
Curbing
3.2 Industry
3.2.1 Construction Industry
Building houses or walls, Cobblestones, for Road Aggregate, Rail Track Ballast, Roadstone
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
3.2.2 Medical Industry
Not Yet Used
Not Applicable
3.3 Antiquity Uses
Artifacts, Sculpture
Artifacts, Monuments, Sculpture
3.4 Other Uses
3.4.1 Commercial Uses
Creating Artwork, Pottery
Creating Artwork, Gemstone, Jewelry, Metallurgical Flux, Source of Magnesia (MgO)
4 Types
4.1 Types
Basaltic Trachyandesite
Endoskarns
4.2 Features
Has High structural resistance against erosion and climate, Very fine grained rock
Host Rock for Lead, Zinc and Copper Deposits
4.3 Archaeological Significance
4.3.1 Monuments
Not Yet Used
Used
4.3.2 Famous Monuments
Not Applicable
Data Not Available
4.3.3 Sculpture
Used
Used
4.3.4 Famous Sculptures
Data Not Available
Data Not Available
4.3.5 Pictographs
Used
Not Used
4.3.6 Petroglyphs
Used
Not Used
4.3.7 Figurines
Used
Used
4.4 Fossils
Absent
Absent
5 Formation
5.1 Formation
Trachyandesite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.
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.
5.2 Composition
5.2.1 Mineral Content
Alkali feldspar, Biotite, Olivine, Plagioclase, Pyroxene, Sodic plagioclase
Calcite, Enstatite, Epidote, Garnet, Magnetite, Pyroxene, Titanite
5.2.2 Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
Au, CaO, Carbon Dioxide, Cu, Fe, MgO
5.3 Transformation
5.3.1 Metamorphism
5.3.2 Types of Metamorphism
Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
5.3.3 Weathering
5.3.4 Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Not Applicable
5.3.5 Erosion
5.3.6 Types of Erosion
Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion
Not Applicable
6 Properties
6.1 Physical Properties
6.1.1 Hardness
4-56.5
Coal
1 7
6.1.2 Grain Size
Fine Grained
Fine Grained
6.1.3 Fracture
Conchoidal
Irregular
6.1.4 Streak
Light to dark brown
Light to dark brown
6.1.5 Porosity
Less Porous
Less Porous
6.1.6 Luster
Earthy
Waxy and Dull
6.1.7 Compressive Strength
37.40 N/mm2NA
What Is Obsidian
0.15 450
6.1.8 Cleavage
Perfect
Slaty
6.1.9 Toughness
2.3
2.4
6.1.10 Specific Gravity
2.8-32.86
Granite
0 8.4
6.1.11 Transparency
Opaque
Opaque
6.1.12 Density
2.9-3.1 g/cm32.8-2.9 g/cm3
Granite
0 1400
6.2 Thermal Properties
6.2.1 Specific Heat Capacity
0.84 kJ/Kg K0.92 kJ/Kg K
What Is Granulite
0.14 3.2
6.2.2 Resistance
Heat Resistant, Pressure Resistant, Wear Resistant
Heat Resistant
7 Reserves
7.1 Deposits in Eastern Continents
7.1.1 Asia
India, Russia
China, India, Russia, Saudi Arabia, South Korea, Sri Lanka
7.1.2 Africa
South Africa
South Africa, Western Africa
7.1.3 Europe
Iceland
United Kingdom
7.1.4 Others
Not Yet Found
Not Yet Found
7.2 Deposits in Western Continents
7.2.1 North America
Canada, USA
Canada
7.2.2 South America
Brazil
Brazil, Colombia, Paraguay
7.3 Deposits in Oceania Continent
7.3.1 Australia
Not Yet Found
Central Australia, Western Australia

All about Trachyandesite and Skarn Properties

Know all about Trachyandesite and Skarn properties here. All properties of rocks are important as they define the type of rock and its application. Trachyandesite belongs to Igneous Rocks while Skarn belongs to Metamorphic Rocks.Texture of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Skarn is Earthy, Mud-rich, Rough. Trachyandesite appears Dull and Soft and Skarn appears Dull. The luster of Trachyandesite is earthy while that of Skarn is waxy and dull. Trachyandesite is available in black, brown, light to dark grey colors whereas Skarn is available in black, brown, colourless, green, grey, white colors. The commercial uses of Trachyandesite are creating artwork, pottery and that of Skarn are creating artwork, gemstone, jewelry, metallurgical flux, source of magnesia (mgo).