Granodiorite and Mylonite

Granodiorite

Mylonite

Definition

Granodiorite is a coarse-grained intrusive igneous rock containing quartz and plagioclase, and which has composition in between granite and diorite

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

History

Origin

Unknown

New Zealand

Discoverer

Unknown

Etymology

From granite + diorite

From Greek mulōn mill + -ite

Class

Igneous Rocks

Metamorphic Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Plutonic

Not Applicable

Other Categories

Coarse Grained Rock, Medium Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

Texture

Granular, Phaneritic

Foliated

Color

Black, Grey, Orange, Pink, White

Black to Grey

Maintenance

Less

Durability

Durable

Water Resistant

Yes

Scratch Resistant

Yes

Stain Resistant

Wind Resistant

Yes

Acid Resistant

Appearance

Veined or Pebbled

Dull, Banded and Foilated

Uses

Architecture

Interior Uses

Bathrooms, Countertops, Decorative Aggregates, Entryways, Floor Tiles, Flooring, Homes, Hotels, Interior Decoration, Stair Treads

Decorative Aggregates, Interior Decoration

Exterior Uses

As Building Stone, Bridges, Paving Stone, Garden Decoration, Office Buildings, Resorts

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

Other Architectural Uses

Not Yet Used

Curbing

Industry

Construction Industry

As Dimension Stone

for Road Aggregate, Landscaping, Roadstone

Medical Industry

Not Yet Used

Antiquity Uses

Artifacts, Monuments, Sculpture

Artifacts, Monuments

Other Uses

Commercial Uses

Curling, Gemstone, Laboratory bench tops, Tombstones

Creating Artwork, Gemstone, Jewelry

Types

Not Available

Blastomylonites, Ultramylonites and Phyllonites

Features

Available in Lots of Colors and Patterns

Surfaces are often shiny

Archaeological Significance

Monuments

Used

Famous Monuments

Data Not Available

Sculpture

Used

Famous Sculptures

Data Not Available

Pictographs

Used

Petroglyphs

Used

Figurines

Used

Fossils

Absent

Formation

Granodiorite is an intrusive igneous rock which is very hard, crystalline and is visibly homogeneous in texture and forms by melting of continental rocks.

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

Composition

Mineral Content

Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz

Porphyroblasts

Compound Content

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

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

Transformation

Metamorphism

Yes

Types of Metamorphism

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

Not Applicable

Weathering

Yes

Types of Weathering

Chemical Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Yes

Types of Erosion

Chemical Erosion, Glacier Erosion, Wind Erosion

Chemical Erosion, Sea Erosion, Wind Erosion

Properties

Physical Properties

Hardness

3-4

Grain Size

Medium to Coarse Grained

Fine Grained

Fracture

Not Available

Conchoidal

Streak

White

Porosity

Less Porous

Highly Porous

Luster

Grainy, Pearly and Vitreous

Shiny

Compressive Strength

175.00 N/mm²

1.28 N/mm²

Cleavage

Not Available

Conchoidal

Toughness

Not Available

Specific Gravity

2.6-2.7

2.97-3.05

Transparency

Opaque

Density

2.6-2.8 g/cm³

2.6-4.8 g/cm³

Thermal Properties

Specific Heat Capacity

0.79 kJ/Kg K

1.50 kJ/Kg K

Resistance

Heat Resistant, Wear Resistant

Heat Resistant, Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam

China, India, Indonesia, Saudi Arabia, South Korea

Africa

Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa

Eritrea, Ethiopia, Ghana, South Africa, Western Africa

Europe

Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic, Venezuela

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

Others

Not Yet Found

Deposits in Western Continents

North America

Canada, USA

USA

South America

Not Yet Found

Deposits in Oceania Continent

Australia

Not Yet Found

Central Australia, Western Australia

Summary >>

<< Reserves

All about Granodiorite and Mylonite Properties

Know all about Granodiorite and Mylonite properties here. All properties of rocks are important as they define the type of rock and its application. Granodiorite belongs to Igneous Rocks while Mylonite belongs to Metamorphic Rocks.Texture of Granodiorite is Granular, Phaneritic whereas that of Mylonite is Foliated. Granodiorite appears Veined or Pebbled and Mylonite appears Dull, Banded and Foilated. The luster of Granodiorite is grainy, pearly and vitreous while that of Mylonite is shiny. Granodiorite is available in black, grey, orange, pink, white colors whereas Mylonite is available in black to grey colors. The commercial uses of Granodiorite are curling, gemstone, laboratory bench tops, tombstones and that of Mylonite are creating artwork, gemstone, jewelry.