Epidosite and Tonalite

Epidosite

Tonalite

Definition

Epidosite is a highly altered epidote and quartz bearing rock which is a type of metasomatite, essentially altered basalt

Tonalite is a coarse-grained plutonic rock consisting mainly of sodic plagioclase, quartz, and hornblende or other mafic minerals with phaneritic texture

History

Origin

Unknown

Tonale, Italy

Discoverer

Unknown

Etymology

Not Available

From Tonale Pass, northern Italy, + -ite1

Class

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

Family

Group

Volcanic

Plutonic

Other Categories

Coarse Grained Rock, Fine Grained Rock, Opaque Rock

Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Glassy, Massive, Porphyritic, Scoriaceous, Vesicular

Phaneritic

Color

Black, Brown, Light to Dark Grey

Black, Brown, Light to Dark Grey, White

Maintenance

Less

Durability

Durable

Water Resistant

Yes

Scratch Resistant

Yes

Stain Resistant

Yes

Wind Resistant

Yes

Acid Resistant

Yes

Appearance

Dull and Soft

Banded and Foilated

Uses

Architecture

Interior Uses

Decorative Aggregates, Floor Tiles, Homes, Hotels, Interior Decoration

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

Exterior Uses

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

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

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

As Dimension Stone, Cement Manufacture, Cobblestones, Construction Aggregate, for Road Aggregate

Medical Industry

Not Yet Used

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts, Sculpture

Other Uses

Commercial Uses

Commemorative Tablets, Creating Artwork

Cemetery Markers, Creating Artwork

Types

Alkaline Basalt, Boninite, High Alumina Basalt, Mid Ocean Ridge Basalt (MORB), Tholeiitic Basalt, Basaltic trachyandesite, Mugearite and Shoshonite

Dacite

Features

Has High structural resistance against erosion and climate, Very fine grained rock

Is one of the oldest rock, Typically speckled black and white.

Archaeological Significance

Monuments

Used

Not Yet Used

Famous Monuments

Data Not Available

Not Applicable

Sculpture

Used

Famous Sculptures

Data Not Available

Pictographs

Used

Not Used

Petroglyphs

Used

Not Used

Figurines

Used

Fossils

Absent

Formation

Epidosite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.

When alkali feldspar is extracted from granite, it changes to granitoid and later, it becomes tonalite with quartz as major mineral.

Composition

Mineral Content

Olivine, Plagioclase, Pyroxene

Albite, Amphibole, Apatite, Biotite, Feldspar, Hornblade, Ilmenite, Magnetite, Manganese Oxides, Olivine, Plagioclase, Pyroxene, Quartz, Sulfides, Titanite, Zircon

Compound Content

Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide

NaCl, CaO, MgO, Silicon Dioxide

Transformation

Metamorphism

Yes

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

Yes

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Yes

Types of Erosion

Not Applicable

Wind Erosion

Properties

Physical Properties

Hardness

6-7

Grain Size

Fine to Coarse Grained

Medium to Fine Coarse Grained

Fracture

Conchoidal

Streak

White to Grey

Bluish Black

Porosity

Less Porous

Very Less Porous

Luster

Not Available

Subvitreous to Dull

Cleavage

Not Available

Toughness

2.3

2.1

Specific Gravity

2.8-3

2.86-3

Transparency

Opaque

Density

Not Available

2.73 g/cm³

Thermal Properties

Specific Heat Capacity

Not Available

0.92 kJ/Kg K

Resistance

Heat Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Pressure Resistant, Water Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Russia

Not Yet Found

Africa

South Africa

Egypt

Europe

Iceland

Finland, Germany, Italy, Romania, Sweden, Turkey

Others

Not Yet Found

Deposits in Western Continents

North America

Canada, USA

USA

South America

Brazil

Argentina, Bolivia, Chile, Colombia, Ecuador, Peru

Deposits in Oceania Continent

Australia

Not Yet Found

New Zealand, South Australia, Western Australia

Summary >>

<< Reserves

All about Epidosite and Tonalite Properties

Know all about Epidosite and Tonalite properties here. All properties of rocks are important as they define the type of rock and its application. Epidosite and Tonalite belong to Igneous Rocks.Texture of Epidosite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Tonalite is Phaneritic. Epidosite appears Dull and Soft and Tonalite appears Banded and Foilated. The luster of Epidosite is not available while that of Tonalite is subvitreous to dull. Epidosite is available in black, brown, light to dark grey colors whereas Tonalite is available in black, brown, light to dark grey, white colors. The commercial uses of Epidosite are commemorative tablets, creating artwork and that of Tonalite are cemetery markers, creating artwork.