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Skarn
Skarn

Adakite
Adakite



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Skarn
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Adakite

Skarn vs Adakite

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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
Adakite is an intermediate to felsic volcanic rock that has geochemical characteristics of magma which is said to be formed by partial melting of altered basalt that is subducted below volcanic arcs

History

Origin

USA, Australia
Adak, Aleutian Islands

Discoverer

Tornebohm
Defant and Drummond

Etymology

From an old Swedish mining term originally used to describe a type of silicate gangue or waste rock.
From Adak, Aleutian Islands

Class

Metamorphic Rocks
Igneous Rocks

Sub-Class

Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock

Family

Group

-
Volcanic

Other Categories

Fine Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Texture

Earthy, Mud-rich, Rough
Porphyritic

Color

Black, Brown, Green, Grey, White
Black, Brown, Light to Dark Grey

Maintenance

Less
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Dull
Dull and Soft

Uses

Architecture

Interior Uses

Decorative Aggregates, Entryways, Interior Decoration
Decorative Aggregates, Floor Tiles, Homes, Hotels, Kitchens

Exterior Uses

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

Other Architectural Uses

Curbing
Whetstones

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, Cobblestones, Rail Track Ballast, Roadstone

Medical Industry

-
-

Antiquity Uses

Artifacts, Monuments, Sculpture
Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Creating Artwork, Gemstone, Jewelry, Metallurgical Flux, Source of Magnesia (MgO)
Commemorative Tablets, Pottery, Used in aquariums

Types

Types

Endoskarns
Intermediate volcanic rock

Features

Host Rock for Lead, Zinc and Copper Deposits
Has High structural resistance against erosion and climate, Host rock for Diamond, Very fine grained rock

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

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.
Adakite rocks are formed when the hydrous fluids are released from minerals that break down in metamorphosed basalt, and rise into the mantle they initiate partial melting.

Composition

Mineral Content

Calcite, Enstatite, Epidote, Garnet, Magnetite, Pyroxene, Titanite
Olivine, Plagioclase, Pyroxene

Compound Content

Au, CaO, Carbon Dioxide, Cu, Fe, MgO
Aluminium Oxide, MgO, Silicon Dioxide

Transformation

Metamorphism

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

Types of Weathering

-
Chemical Weathering, Mechanical Weathering

Erosion

Types of Erosion

-
Coastal Erosion, Sea Erosion, Water Erosion

Properties

Physical Properties

Hardness

6.53-4
1 7
👆🏻

Grain Size

Fine Grained
Fine to Medium Grained

Fracture

Irregular
Conchoidal

Streak

Light to dark brown
Bluish Black

Porosity

Less Porous
Less Porous

Luster

Waxy and Dull
Grainy, Pearly and Vitreous

Compressive Strength

70.00 N/mm2200.00 N/mm2
0.15 450
👆🏻

Cleavage

Slaty
-

Toughness

2.4
-

Specific Gravity

2.86-9999
0 8.4
👆🏻

Transparency

Opaque
Opaque

Density

2.8-2.9 g/cm3-9999 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

0.92 kJ/Kg K0.84 kJ/Kg K
0.14 3.2
👆🏻

Resistance

Heat Resistant
Heat Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India, Russia, Saudi Arabia, South Korea, Sri Lanka
India, Russia

Africa

South Africa, Western Africa
Ethiopia, Somalia, South Africa

Europe

United Kingdom
Iceland

Others

-
-

Deposits in Western Continents

North America

Canada
Canada, USA

South America

Brazil, Colombia, Paraguay
Brazil

Deposits in Oceania Continent

Australia

Central Australia, Western Australia
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Skarn vs Adakite Information

Earth’s outer layer is covered by rocks and these rocks have different physical and chemical properties. As two rocks are not same, it’s fun to compare them. You can also know more about Skarn and Adakite Reserves. Skarns are formed during regional or contact metamorphism and from a variety of metasomatic processes involving fluids of magmatic, metamorphic, and/or marine origin. Adakite is an intermediate to felsic volcanic rock that has geochemical characteristics of magma which is said to be formed by partial melting of altered basalt that is subducted below volcanic arcs. These rocks are composed of many distinct minerals. The process of formation of rocks is different for various rocks. Rocks are quarried from many years for various purposes. You can check out Skarn vs Adakite information and Skarn vs Adakite characteristics in the upcoming sections.

Skarn vs Adakite Characteristics

Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Skarn vs Adakite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Skarn and Properties of Adakite. Learn more about Skarn vs Adakite in the next section. The interior uses of Skarn include Decorative aggregates, Entryways and Interior decoration whereas the interior uses of Adakite include Decorative aggregates, Floor tiles, Homes, Hotels and Kitchens. Due to some exceptional properties of Skarn and Adakite, they have various applications in construction industry. The uses of Skarn in construction industry include 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 and that of Adakite include As dimension stone, Cobblestones, Rail track ballast, Roadstone.

More about Skarn and Adakite

Here you can know more about Skarn and Adakite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Skarn and Adakite consists of mineral content and compound content. The mineral content of Skarn includes Calcite, Enstatite, Epidote, Garnet, Magnetite, Pyroxene, Titanite and mineral content of Adakite includes Olivine, Plagioclase, Pyroxene. You can also check out the list of all Metamorphic Rocks. When we have to compare Skarn vs Adakite, the texture, color and appearance plays an important role in determining the type of rock. Skarn is available in black, brown, green, grey, white colors whereas, Adakite is available in black, brown, light to dark grey colors. Appearance of Skarn is Dull and that of Adakite is Dull and Soft. Properties of rock is another aspect for Skarn vs Adakite. The hardness of Skarn is 6.5 and that of Adakite is 3-4. The types of Skarn are Endoskarns whereas types of Adakite are Intermediate volcanic rock. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Skarn is light to dark brown while that of Adakite is bluish black. The specific heat capacity of Skarn is 0.92 kJ/Kg K and that of Adakite is 0.84 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Skarn is heat resistant whereas Adakite is heat resistant, pressure resistant, wear resistant.