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Trachyandesite
Trachyandesite

Skarn
Skarn



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Trachyandesite
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Skarn

Trachyandesite vs Skarn

Definition

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

History

Origin

Indonesia
USA, Australia

Discoverer

Unknown
Tornebohm

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.

Class

Igneous Rocks
Metamorphic Rocks

Sub-Class

Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock

Family

Group

Volcanic
-

Other Categories

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

Texture

Texture

Glassy, Massive, Porphyritic, Scoriaceous, Vesicular
Earthy, Mud-rich, Rough

Color

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

Maintenance

Less
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Dull and Soft
Dull

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Homes, Interior Decoration
Decorative Aggregates, Entryways, Interior Decoration

Exterior Uses

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

Other Architectural Uses

Curbing
Curbing

Industry

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

Medical Industry

-
-

Antiquity Uses

Artifacts, Sculpture
Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

Creating Artwork, Pottery
Creating Artwork, Gemstone, Jewelry, Metallurgical Flux, Source of Magnesia (MgO)

Types

Types

Basaltic Trachyandesite
Endoskarns

Features

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

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Absent
Absent

Formation

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.

Composition

Mineral Content

Alkali feldspar, Biotite, Olivine, Plagioclase, Pyroxene, Sodic plagioclase
Calcite, Enstatite, Epidote, Garnet, Magnetite, Pyroxene, Titanite

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

Transformation

Metamorphism

Types of Metamorphism

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

Weathering

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering
-

Erosion

Types of Erosion

Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion
-

Properties

Physical Properties

Hardness

4-56.5
1 7
👆🏻

Grain Size

Fine Grained
Fine Grained

Fracture

Conchoidal
Irregular

Streak

Light to dark brown
Light to dark brown

Porosity

Less Porous
Less Porous

Luster

Earthy
Waxy and Dull

Compressive Strength

37.40 N/mm270.00 N/mm2
0.15 450
👆🏻

Cleavage

Perfect
Slaty

Toughness

2.3
2.4

Specific Gravity

2.8-32.86
0 8.4
👆🏻

Transparency

Opaque
Opaque

Density

2.9-3.1 g/cm32.8-2.9 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K0.92 kJ/Kg K
0.14 3.2
👆🏻

Resistance

Heat Resistant, Pressure Resistant, Wear Resistant
Heat Resistant

Reserves

Deposits in Eastern Continents

Asia

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

Africa

South Africa
South Africa, Western Africa

Europe

Iceland
United Kingdom

Others

-
-

Deposits in Western Continents

North America

Canada, USA
Canada

South America

Brazil
Brazil, Colombia, Paraguay

Deposits in Oceania Continent

Australia

-
Central Australia, Western Australia

Trachyandesite vs Skarn 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 Trachyandesite and Skarn Reserves. 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. 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 Trachyandesite vs Skarn information and Trachyandesite vs Skarn characteristics in the upcoming sections.

Trachyandesite vs Skarn 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. Trachyandesite vs Skarn characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Trachyandesite and Properties of Skarn. Learn more about Trachyandesite vs Skarn in the next section. The interior uses of Trachyandesite include Countertops, Decorative aggregates, Homes and Interior decoration whereas the interior uses of Skarn include Decorative aggregates, Entryways and Interior decoration. Due to some exceptional properties of Trachyandesite and Skarn, they have various applications in construction industry. The uses of Trachyandesite in construction industry include Building houses or walls, Cobblestones, For road aggregate, Rail track ballast, Roadstone and that of Skarn 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.

More about Trachyandesite and Skarn

Here you can know more about Trachyandesite and Skarn. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Trachyandesite and Skarn consists of mineral content and compound content. The mineral content of Trachyandesite includes Alkali feldspar, Biotite, Olivine, Plagioclase, Pyroxene, Sodic plagioclase and mineral content of Skarn includes Calcite, Enstatite, Epidote, Garnet, Magnetite, Pyroxene, Titanite. You can also check out the list of all Igneous Rocks. When we have to compare Trachyandesite vs Skarn, the texture, color and appearance plays an important role in determining the type of rock. Trachyandesite is available in black, brown, light to dark grey colors whereas, Skarn is available in black, brown, green, grey, white colors. Appearance of Trachyandesite is Dull and Soft and that of Skarn is Dull. Properties of rock is another aspect for Trachyandesite vs Skarn. The hardness of Trachyandesite is 4-5 and that of Skarn is 6.5. The types of Trachyandesite are Basaltic Trachyandesite whereas types of Skarn are Endoskarns. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Trachyandesite and Skarn is light to dark brown. The specific heat capacity of Trachyandesite is 0.84 kJ/Kg K and that of Skarn is 0.92 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Trachyandesite is heat resistant, pressure resistant, wear resistant whereas Skarn is heat resistant.