Mylonite

Cataclasite

Mylonite and Cataclasite

Mylonite

Cataclasite

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Definition

Mylonite is a metamorphic rock formed by ductile deformation during intense shearing encountered during folding and faulting, a process termed cataclastic or dynamic metamorphism

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

History

Origin

New Zealand

Swiss Alps, Europe

Discoverer

Unknown

Michael Tellinger

Etymology

From Greek mulōn mill + -ite

From the Italian word cataclasi

Class

Metamorphic Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Other Categories

Fine Grained Rock, Opaque Rock

Texture

Foliated

Clastic

Color

Black to Grey

Brown, Green, White, Yellow

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull, Banded and Foilated

Dull and Banded

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration

Decorative Aggregates, Homes

Exterior Uses

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

As Building Stone, As Facing Stone, Paving Stone

Other Architectural Uses

Curbing

Industry

Construction Industry

for Road Aggregate, Landscaping, Roadstone

As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate

Medical Industry

Antiquity Uses

Artifacts, Monuments

Artifacts

Other Uses

Commercial Uses

Creating Artwork, Gemstone, Jewelry

Commemorative Tablets, Creating Artwork

Types

Blastomylonites, Ultramylonites and Phyllonites

Protocataclasite, Mesocataclasite, Ultracataclasite and Foliated cataclasite

Features

Surfaces are often shiny

Easily splits into thin plates, Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Mylonites are ductilely deformed rocks formed by the accumulation of large shear strain, in ductile fault zones.

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.

Composition

Mineral Content

Porphyroblasts

Albite, Apatite, Augite, Biotite, Calcite, Enstatite, Epidote, Feldspar, Micas, Muscovite or Illite, Pyroxene, Quartz

Compound Content

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

Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Sea Erosion, Wind Erosion

Coastal Erosion, Wind Erosion

Properties

Physical Properties

Hardness

3-43-4

1 7

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Grain Size

Fine Grained

Fracture

Conchoidal

Streak

White

Black

Porosity

Highly Porous

Less Porous

Luster

Shiny

Vitreous

Compressive Strength

1.28 N/mm²50.00 N/mm²

0.15 450

👆🏻

Cleavage

Conchoidal

Toughness

Specific Gravity

2.97-3.052.1

0 8.4

👆🏻

Transparency

Opaque

Translucent to Opaque

Density

2.6-4.8 g/cm³2.9-3.1 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

1.50 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India, Indonesia, Saudi Arabia, South Korea

China, India, Russia, Saudi Arabia, South Korea

Africa

Eritrea, Ethiopia, Ghana, South Africa, Western Africa

Egypt, Ethiopia, Kenya, Madagascar, Morocco, South Africa

Europe

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

England, Finland, France, Spain, United Kingdom

Others

Deposits in Western Continents

North America

USA

Canada, USA

South America

Argentina, Colombia

Deposits in Oceania Continent

Australia

Central Australia, Western Australia

All about Mylonite and Cataclasite Properties

Know all about Mylonite and Cataclasite properties here. All properties of rocks are important as they define the type of rock and its application. Mylonite and Cataclasite belong to Metamorphic Rocks.Texture of Mylonite is Foliated whereas that of Cataclasite is Clastic. Mylonite appears Dull, Banded and Foilated and Cataclasite appears Dull and Banded. The luster of Mylonite is shiny while that of Cataclasite is vitreous. Mylonite is available in black to grey colors whereas Cataclasite is available in brown, green, white, yellow colors. The commercial uses of Mylonite are creating artwork, gemstone, jewelry and that of Cataclasite are commemorative tablets, creating artwork.