Mylonite

Anorthosite

Mylonite and Anorthosite

Mylonite

Anorthosite

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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

Anorthosite is a granular igneous rock composed largely of labradorite or plagioclase

History

Origin

New Zealand

Discoverer

Unknown

Etymology

From Greek mulōn mill + -ite

From French anorthose plagioclase + -ite1

Class

Metamorphic Rocks

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Plutonic

Other Categories

Fine Grained Rock, Opaque Rock

Coarse Grained Rock, Opaque Rock

Texture

Foliated

Foliated, Glassy

Color

Black to Grey

Black, Bluish - Grey, Brown, Green, Grey, Light Greenish Grey, Pink, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull, Banded and Foilated

Layered, Banded, Veined and Shiny

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration

Decorative Aggregates, Floor Tiles, Homes, Interior Decoration

Exterior Uses

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

As Building Stone, As Facing Stone, Garden Decoration

Other Architectural Uses

Curbing

Industry

Construction Industry

for Road Aggregate, Landscaping, Roadstone

As Dimension Stone, Cement Manufacture, for Road Aggregate

Medical Industry

Antiquity Uses

Artifacts, Monuments

Artifacts, Sculpture, Small Figurines

Other Uses

Commercial Uses

Creating Artwork, Gemstone, Jewelry

Creating Artwork, Curling

Types

Blastomylonites, Ultramylonites and Phyllonites

Proterozoic Anorthosite and Archean Anorthosite

Features

Surfaces are often shiny

Generally rough to touch, 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.

Anorthosite is a phaneritic, intrusive igneous rock which is characterized by a predominance of plagioclase feldspar which is almost 90–100%, and a minimal mafic component.

Composition

Mineral Content

Porphyroblasts

Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene

Compound Content

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

Ca, CaO, Chromium(III) Oxide, MgO, Sulfur Trioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Biological Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Sea Erosion, Wind Erosion

Chemical Erosion, Wind Erosion

Properties

Physical Properties

Hardness

3-45-6

1 7

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Grain Size

Fine Grained

Coarse Grained

Fracture

Conchoidal

Irregular

Streak

White

Porosity

Highly Porous

Less Porous

Luster

Shiny

Pearly to Subvitreous

Compressive Strength

1.28 N/mm²180.00 N/mm²

0.15 450

👆🏻

Cleavage

Conchoidal

Toughness

Specific Gravity

2.97-3.052.62-2.82

0 8.4

👆🏻

Transparency

Opaque

Translucent

Density

2.6-4.8 g/cm³2.7-4 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

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

Reserves

Deposits in Eastern Continents

Asia

China, India, Indonesia, Saudi Arabia, South Korea

Africa

Eritrea, Ethiopia, Ghana, South Africa, Western Africa

Europe

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

Bulgaria, France, Germany, Greece, Hungary, Italy, Latvia, Lithuania, Malta, Poland, Portugal, Romania, Slovenia, Spain, Sweden, The Czech Republic

Others

Deposits in Western Continents

North America

USA

Canada

South America

Bolivia, Colombia

Deposits in Oceania Continent

Australia

Central Australia, Western Australia

Central Australia, South Australia, Western Australia

All about Mylonite and Anorthosite Properties

Know all about Mylonite and Anorthosite properties here. All properties of rocks are important as they define the type of rock and its application. Mylonite belongs to Metamorphic Rocks while Anorthosite belongs to Igneous Rocks.Texture of Mylonite is Foliated whereas that of Anorthosite is Foliated, Glassy. Mylonite appears Dull, Banded and Foilated and Anorthosite appears Layered, Banded, Veined and Shiny. The luster of Mylonite is shiny while that of Anorthosite is pearly to subvitreous. Mylonite is available in black to grey colors whereas Anorthosite is available in black, bluish - grey, brown, green, grey, light greenish grey, pink, white colors. The commercial uses of Mylonite are creating artwork, gemstone, jewelry and that of Anorthosite are creating artwork, curling.