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Boninite
Boninite

Mylonite
Mylonite



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Boninite
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Boninite vs Mylonite

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Definition

Definition

Boninite is a mafic extrusive rock which is high in magnesium and silica content, formed in fore-arc environments, typically during the early stages of subduction
Mylonite is a metamorphic rock formed by ductile deformation during intense shearing encountered during folding and faulting, a process termed cataclastic or dynamic metamorphism

History

Origin

Japan
New Zealand

Discoverer

Unknown
Unknown

Etymology

From its occurrence in the Izu-Bonin arc south of Japan
From Greek mulōn mill + -ite

Class

Igneous Rocks
Metamorphic 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, Opaque Rock

Texture

Texture

Aphanitic to Porphyritic
Foliated

Color

Bluish - Grey, Brown, Green, Grey
Black to Grey

Maintenance

Less
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Dull and Soft
Dull, Banded and Foilated

Uses

Architecture

Interior Uses

Decorative Aggregates, Homes, Kitchens
Decorative Aggregates, Interior Decoration

Exterior Uses

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

Other Architectural Uses

-
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, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories
for Road Aggregate, Landscaping, Roadstone

Medical Industry

-
-

Antiquity Uses

Artifacts
Artifacts, Monuments

Other Uses

Commercial Uses

An Oil and Gas Reservoir, Cemetery Markers, Creating Artwork, Soil Conditioner, Source of Magnesia (MgO)
Creating Artwork, Gemstone, Jewelry

Types

Types

Basalt
Blastomylonites, Ultramylonites and Phyllonites

Features

Available in Lots of Colors and Patterns, High Mg content, Is one of the oldest rock
Surfaces are often shiny

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Absent
Absent

Formation

Formation

Boninite is a type of Igneous rock which is formed through the cooling and solidification of lava or existing rocks.
Mylonites are ductilely deformed rocks formed by the accumulation of large shear strain, in ductile fault zones.

Composition

Mineral Content

Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite
Porphyroblasts

Compound Content

Silicon Dioxide
Aluminium Oxide, Calcium Sulfate, Chromium(III) Oxide, Iron(III) Oxide, Magnesium Carbonate, Silicon Dioxide

Transformation

Metamorphism

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism
-

Weathering

Types of Weathering

Biological Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Types of Erosion

Chemical Erosion, Coastal Erosion, Wind Erosion
Chemical Erosion, Sea Erosion, Wind Erosion

Properties

Physical Properties

Hardness

73-4
1 7
👆🏻

Grain Size

Fine Grained
Fine Grained

Fracture

Uneven
Conchoidal

Streak

White
White

Porosity

Less Porous
Highly Porous

Luster

Vitreous
Shiny

Compressive Strength

150.00 N/mm21.28 N/mm2
0.15 450
👆🏻

Cleavage

-
Conchoidal

Toughness

1.1
-

Specific Gravity

2.5-2.82.97-3.05
0 8.4
👆🏻

Transparency

Opaque
Opaque

Density

-9999 g/cm32.6-4.8 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K1.50 kJ/Kg K
0.14 3.2
👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

-
China, India, Indonesia, Saudi Arabia, South Korea

Africa

South Africa
Eritrea, Ethiopia, Ghana, South Africa, Western Africa

Europe

England, Finland, United Kingdom
England, Finland, France, Germany, Great Britain, Greece, United Kingdom

Others

Antarctica, Greenland
-

Deposits in Western Continents

North America

USA
USA

South America

Colombia, Uruguay
-

Deposits in Oceania Continent

Australia

New Zealand, Western Australia
Central Australia, Western Australia

Boninite vs Mylonite 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 Boninite and Mylonite Reserves. Boninite is a mafic extrusive rock which is high in magnesium and silica content, formed in fore-arc environments, typically during the early stages of subduction. Mylonite is a metamorphic rock formed by ductile deformation during intense shearing encountered during folding and faulting, a process termed cataclastic or dynamic metamorphism. 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 Boninite vs Mylonite information and Boninite vs Mylonite characteristics in the upcoming sections.

Boninite vs Mylonite 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. Boninite vs Mylonite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Boninite and Properties of Mylonite. Learn more about Boninite vs Mylonite in the next section. The interior uses of Boninite include Decorative aggregates, Homes and Kitchens whereas the interior uses of Mylonite include Decorative aggregates and Interior decoration. Due to some exceptional properties of Boninite and Mylonite, they have various applications in construction industry. The uses of Boninite 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, Cement manufacture, For road aggregate, Making natural cement, Manufacture of magnesium and dolomite refractories and that of Mylonite include For road aggregate, Landscaping, Roadstone.

More about Boninite and Mylonite

Here you can know more about Boninite and Mylonite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Boninite and Mylonite consists of mineral content and compound content. The mineral content of Boninite includes Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite and mineral content of Mylonite includes Porphyroblasts. You can also check out the list of all Igneous Rocks. When we have to compare Boninite vs Mylonite, the texture, color and appearance plays an important role in determining the type of rock. Boninite is available in bluish - grey, brown, green, grey colors whereas, Mylonite is available in black to grey colors. Appearance of Boninite is Dull and Soft and that of Mylonite is Dull, Banded and Foilated. Properties of rock is another aspect for Boninite vs Mylonite. The hardness of Boninite is 7 and that of Mylonite is 3-4. The types of Boninite are Basalt whereas types of Mylonite are Blastomylonites, Ultramylonites and Phyllonites. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Boninite and Mylonite is white. The specific heat capacity of Boninite is 0.84 kJ/Kg K and that of Mylonite is 1.50 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Boninite is heat resistant, impact resistant, pressure resistant, wear resistant whereas Mylonite is heat resistant, impact resistant, pressure resistant.