Tonalite

Mylonite

Tonalite and Mylonite

Tonalite

Mylonite

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1 Definition

1.1 Definition

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

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

1.2 History

1.2.1 Origin

Tonale, Italy

New Zealand

1.2.2 Discoverer

Unknown

1.3 Etymology

From Tonale Pass, northern Italy, + -ite1

From Greek mulōn mill + -ite

1.4 Class

Igneous Rocks

Metamorphic Rocks

1.4.1 Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

1.5 Family

1.5.1 Group

Plutonic

Not Applicable

1.6 Other Categories

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

Fine Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Phaneritic

Foliated

2.2 Color

Black, Brown, Light to Dark Grey, White

Black to Grey

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

2.4.2 Scratch Resistant

✔ ✘

2.4.3 Stain Resistant

✔ ✘

2.4.4 Wind Resistant

✔ ✘

2.4.5 Acid Resistant

✔ ✘

2.5 Appearance

Banded and Foilated

Dull, Banded and Foilated

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

Decorative Aggregates, Interior Decoration

3.1.2 Exterior Uses

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

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

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

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

for Road Aggregate, Landscaping, Roadstone

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts, Sculpture

Artifacts, Monuments

3.4 Other Uses

3.4.1 Commercial Uses

Cemetery Markers, Creating Artwork

Creating Artwork, Gemstone, Jewelry

4 Types

4.1 Types

Dacite

Blastomylonites, Ultramylonites and Phyllonites

4.2 Features

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

Surfaces are often shiny

4.3 Archaeological Significance

4.3.1 Monuments

Not Yet Used

Used

4.3.2 Famous Monuments

Not Applicable

Data Not Available

4.3.3 Sculpture

Used

4.3.4 Famous Sculptures

Data Not Available

4.3.5 Pictographs

Not Used

Used

4.3.6 Petroglyphs

Not Used

Used

4.3.7 Figurines

Used

4.4 Fossils

Absent

5 Formation

5.1 Formation

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

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

5.2 Composition

5.2.1 Mineral Content

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

Porphyroblasts

5.2.2 Compound Content

NaCl, CaO, MgO, Silicon Dioxide

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

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

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

Not Applicable

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Wind Erosion

Chemical Erosion, Sea Erosion, Wind Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

6-73-4

1 7

6.1.2 Grain Size

Medium to Fine Coarse Grained

Fine Grained

6.1.3 Fracture

Conchoidal

6.1.4 Streak

Bluish Black

White

6.1.5 Porosity

Very Less Porous

Highly Porous

6.1.6 Luster

Subvitreous to Dull

Shiny

6.1.7 Compressive Strength

NA1.28 N/mm²

0.15 450

6.1.8 Cleavage

Not Available

Conchoidal

6.1.9 Toughness

2.1

Not Available

6.1.10 Specific Gravity

2.86-32.97-3.05

0 8.4

6.1.11 Transparency

Opaque

6.1.12 Density

2.73 g/cm³2.6-4.8 g/cm³

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

0.92 kJ/Kg K1.50 kJ/Kg K

0.14 3.2

6.2.2 Resistance

Heat Resistant, Pressure Resistant, Water Resistant

Heat Resistant, Impact Resistant, Pressure Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

Not Yet Found

China, India, Indonesia, Saudi Arabia, South Korea

7.1.2 Africa

Egypt

Eritrea, Ethiopia, Ghana, South Africa, Western Africa

7.1.3 Europe

Finland, Germany, Italy, Romania, Sweden, Turkey

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

7.1.4 Others

Not Yet Found

7.2 Deposits in Western Continents

7.2.1 North America

USA

7.2.2 South America

Argentina, Bolivia, Chile, Colombia, Ecuador, Peru

Not Yet Found

7.3 Deposits in Oceania Continent

7.3.1 Australia

New Zealand, South Australia, Western Australia

Central Australia, Western Australia

All about Tonalite and Mylonite Properties

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