Mylonite

Eclogite

Mylonite and Eclogite

Mylonite

Eclogite

Add ⊕

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

Eclogite is an extreme metamorphic rock, formed by regional metamorphism of basalt rock under very high pressure and temperature

History

Origin

New Zealand

Discoverer

Unknown

René Just Haüy

Etymology

From Greek mulōn mill + -ite

From French, Greek eklogē selection with reference to the selective content of the rock + -ite1

Class

Metamorphic Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Other Categories

Fine Grained Rock, Opaque Rock

Texture

Foliated

Earthy

Color

Black to Grey

Black, Brown, Green, Grey, Pink, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull, Banded and Foilated

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration

Exterior Uses

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

Paving Stone, Garden Decoration

Other Architectural Uses

Curbing

Industry

Construction Industry

for Road Aggregate, Landscaping, Roadstone

Medical Industry

In Chemical and Pharmaceutical Industry, Medicines and Cosmetics

Antiquity Uses

Artifacts, Monuments

Artifacts

Other Uses

Commercial Uses

Creating Artwork, Gemstone, Jewelry

Creating Artwork, Gemstone

Types

Blastomylonites, Ultramylonites and Phyllonites

Eclogite

Features

Surfaces are often shiny

Available in Lots of Colors and Patterns, 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.

Eclogite forms from high-pressure metamorphism of mafic igneous rocks mainly, basalt or gabbro as it plunges into the mantle in a subduction zone.

Composition

Mineral Content

Porphyroblasts

Amphibole, Coesite, Corundum, Dolomite, Garnet, Kyanite, Lawsonite, Paragonite, Phengite, Pyroxene, Quartz, Rutile, Zoisite

Compound Content

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

Aluminium Oxide, NaCl, CaO, Carbon Dioxide, Iron(III) Oxide, Magnesium Carbonate, MgO, Sodium Oxide, Potassium, Sodium

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

Chemical Erosion, Sea Erosion

Properties

Physical Properties

Hardness

3-43.5-4

1 7

👆🏻

Grain Size

Fine Grained

Fracture

Conchoidal

Streak

White

Porosity

Highly Porous

Less Porous

Luster

Shiny

Subvitreous to Dull

Compressive Strength

1.28 N/mm²200.00 N/mm²

0.15 450

👆🏻

Cleavage

Conchoidal

Perfect

Toughness

Specific Gravity

2.97-3.052.86-2.87

0 8.4

👆🏻

Transparency

Opaque

Density

2.6-4.8 g/cm³3.2-3.6 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

1.50 kJ/Kg K0.75 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant

Heat Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India, Indonesia, Saudi Arabia, South Korea

India, Kazakhstan, Kuwait, Russia, South Korea, Thailand, Turkey

Africa

Eritrea, Ethiopia, Ghana, South Africa, Western Africa

Ethiopia, Morocco, South Africa

Europe

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

France, Germany, Italy, Norway, Scotland

Others

Greenland

Deposits in Western Continents

North America

USA

Canada, Costa Rica, Panama, USA

South America

Argentina, Brazil, Colombia, Ecuador

Deposits in Oceania Continent

Australia

Central Australia, Western Australia

Central Australia, New Zealand, Queensland

All about Mylonite and Eclogite Properties

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