Eclogite

Anorthosite

Eclogite and Anorthosite

Eclogite

Anorthosite

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Definition

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

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

History

Origin

Discoverer

René Just Haüy

Unknown

Etymology

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

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

Earthy

Foliated, Glassy

Color

Black, Brown, Green, Grey, Pink, White

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

Paving Stone, Garden Decoration

As Building Stone, As Facing Stone, Garden Decoration

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Cement Manufacture, for Road Aggregate

Medical Industry

In Chemical and Pharmaceutical Industry, Medicines and Cosmetics

Antiquity Uses

Artifacts

Artifacts, Sculpture, Small Figurines

Other Uses

Commercial Uses

Creating Artwork, Gemstone

Creating Artwork, Curling

Types

Eclogite

Proterozoic Anorthosite and Archean Anorthosite

Features

Available in Lots of Colors and Patterns, Generally rough to touch, Is one of the oldest rock

Generally rough to touch, Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

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

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

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

Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene

Compound Content

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

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Mechanical Weathering

Biological Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Sea Erosion

Chemical Erosion, Wind Erosion

Properties

Physical Properties

Hardness

3.5-45-6

1 7

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Grain Size

Fine Grained

Coarse Grained

Fracture

Irregular

Streak

White

Porosity

Less Porous

Luster

Subvitreous to Dull

Pearly to Subvitreous

Compressive Strength

200.00 N/mm²180.00 N/mm²

0.15 450

👆🏻

Cleavage

Perfect

Toughness

Specific Gravity

2.86-2.872.62-2.82

0 8.4

👆🏻

Transparency

Opaque

Translucent

Density

3.2-3.6 g/cm³2.7-4 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.75 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant

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

Reserves

Deposits in Eastern Continents

Asia

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

Africa

Ethiopia, Morocco, South Africa

Europe

France, Germany, Italy, Norway, Scotland

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

Others

Greenland

Deposits in Western Continents

North America

Canada, Costa Rica, Panama, USA

Canada

South America

Argentina, Brazil, Colombia, Ecuador

Bolivia, Colombia

Deposits in Oceania Continent

Australia

Central Australia, New Zealand, Queensland

Central Australia, South Australia, Western Australia

All about Eclogite and Anorthosite Properties

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